{ "ok": true, "mode": "JS8", "tool": "webftr-js8-timing-boundary-candidate-sweep", "tool_version": "step42-direct-primary-bounded-repair", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "profile_scan_json": "/decoders/js8_decoder/logs/20260527T055654Z_real_run_profile_scan_output.json", "anchor_json": "/decoders/js8_decoder/logs/20260527T055654Z_real_run_auto_ldpc_probe_output.json", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step42_timing_boundary_syndrome_sweep_no_message_unpack", "anchor_selection": { "source": "profile_scan_json", "path": "/decoders/js8_decoder/logs/20260527T055654Z_real_run_profile_scan_output.json", "selection": "profile_scan_selected_profile", "nsps": 6400, "start_seconds": 4.8, "base_freq_hz": 1025.0, "tone_spacing_hz": 1.875 }, "partial": false, "partial_reason": "complete", "sweep_elapsed_seconds": 158.859, "sweep_grid": { "start_offsets_s": [ 0.03, 0.06, 0.09 ], "base_freq_offsets_hz": [ 2.5, 2.75, 3.0, 3.25, 3.5 ], "tone_spacing_offsets_hz": [ 0.015, 0.03, 0.045 ], "max_combinations": 45, "actual_combinations": 45, "processed_combinations": 45, "time_budget_seconds": 210.0 }, "decode_found": false, "best_final_syndrome_weight": 22, "best_candidate": { "combination_index": 23, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:23" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, "top_candidates": [ { "combination_index": 23, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:23" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 140, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 107.311136, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b59638aa8882d6", "codeword174_sha256_16": "0228efbd612c9092" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.67241, "min_abs": 0.015278, "max_abs": 4.092886, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.68964, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "6a76c3f6f4855f72", "codeword174_sha256_16": "e94fe0f75c74d230" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.591212, "min_abs": 0.003661, "max_abs": 4.126624, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 106.364848, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "90bdd003a67ea079" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.64278, "min_abs": 0.002394, "max_abs": 4.126624, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 106.57112, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "4f673c96b1f1de5c", "codeword174_sha256_16": "eb17c3d482c6c1fa" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 83, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 99.529872, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "e3f175dd3a2c81b2", "codeword174_sha256_16": "d5da07ca10be5a38" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 138, "llr_stats": { "count": 174, "avg_abs": 2.265758, "min_abs": 0.020953, "max_abs": 4.126624, "positive": 35, "negative": 139, "zero": 0 }, "source_rank_score": 109.063032, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d5fd881ddc0d6fa3", "codeword174_sha256_16": "524f6b31360d4b54" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 121, "llr_stats": { "count": 174, "avg_abs": 1.882468, "min_abs": 0.003299, "max_abs": 4.126624, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 111.529872, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "eaf8f2e0f46bfa41" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.827784, "min_abs": 0.008053, "max_abs": 4.126624, "positive": 36, "negative": 138, "zero": 0 }, "source_rank_score": 111.311136, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "b5db807c301847ac", "codeword174_sha256_16": "3bc0238a33865be3" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 34, "offsets": { "start_offset_s": 0.09, "base_freq_offset_hz": 2.75, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.89, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58680, "start_seconds": 4.89, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:34" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 122, "llr_stats": { "count": 174, "avg_abs": 1.349276, "min_abs": 0.000824, "max_abs": 3.832662, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 105.397104, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "f0b9fd8275af36c7", "codeword174_sha256_16": "a2df0840cd4835fb" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 122, "llr_stats": { "count": 174, "avg_abs": 1.349276, "min_abs": 0.000824, "max_abs": 3.832662, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 105.397104, "syndrome_weight": 22, "valid_codeword_hard_decision": false, "message91_sha256_16": "f0b9fd8275af36c7", "codeword174_sha256_16": "a2df0840cd4835fb" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 31, "llr_stats": { "count": 174, "avg_abs": 2.062752, "min_abs": 0.015792, "max_abs": 4.062193, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 108.251008, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "9ff5d9aede7d6cb9", "codeword174_sha256_16": "c5d7db01a6e72868" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 148, "llr_stats": { "count": 174, "avg_abs": 2.421507, "min_abs": 0.016094, "max_abs": 4.062193, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 109.686028, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "31e68b38619644e3", "codeword174_sha256_16": "56f6e3eee1194db0" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 33, "llr_stats": { "count": 174, "avg_abs": 2.004834, "min_abs": 0.011334, "max_abs": 4.062193, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 108.019336, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "9ff5d9aede7d6cb9", "codeword174_sha256_16": "f6c9985e3b4f0c3a" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 122, "llr_stats": { "count": 174, "avg_abs": 1.349276, "min_abs": 0.000824, "max_abs": 3.832662, "positive": 48, "negative": 126, "zero": 0 }, "source_rank_score": 105.397104, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "473d813dca6fa058", "codeword174_sha256_16": "280938c2b2bceff7" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 2.004834, "min_abs": 0.011334, "max_abs": 4.062193, "positive": 33, "negative": 141, "zero": 0 }, "source_rank_score": 126.019336, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "39fdca8a564f75d1", "codeword174_sha256_16": "c860a66dc39291cd" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.801076, "min_abs": 0.011334, "max_abs": 3.832662, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 117.204304, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "39fdca8a564f75d1", "codeword174_sha256_16": "c860a66dc39291cd" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 39, "llr_stats": { "count": 174, "avg_abs": 2.062752, "min_abs": 0.015792, "max_abs": 4.062193, "positive": 144, "negative": 30, "zero": 0 }, "source_rank_score": 112.251008, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "8fb2d18adf6d12a0", "codeword174_sha256_16": "e257f609e418cd23" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 17, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:17" }, "best_row": { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.889166, "min_abs": 0.023337, "max_abs": 4.389904, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 111.556664, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "339b76da8237e87f", "codeword174_sha256_16": "89e62c1df19546da" }, "top_rows": [ { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.889166, "min_abs": 0.023337, "max_abs": 4.389904, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 111.556664, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "339b76da8237e87f", "codeword174_sha256_16": "89e62c1df19546da" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.699718, "min_abs": 0.023337, "max_abs": 3.983109, "positive": 45, "negative": 129, "zero": 0 }, "source_rank_score": 109.798872, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "339b76da8237e87f", "codeword174_sha256_16": "89e62c1df19546da" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 128, "llr_stats": { "count": 174, "avg_abs": 1.958645, "min_abs": 0.001909, "max_abs": 4.389904, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 111.83458, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "339b76da8237e87f", "codeword174_sha256_16": "7f5e77fbd6502d39" }, { "variant": "reverse_full_bitstream", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 128, "llr_stats": { "count": 174, "avg_abs": 1.769196, "min_abs": 0.001909, "max_abs": 3.983109, "positive": 39, "negative": 135, "zero": 0 }, "source_rank_score": 110.076784, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "339b76da8237e87f", "codeword174_sha256_16": "7f5e77fbd6502d39" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 139, "llr_stats": { "count": 174, "avg_abs": 1.958645, "min_abs": 0.001909, "max_abs": 4.389904, "positive": 28, "negative": 146, "zero": 0 }, "source_rank_score": 107.83458, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c6a1e6c5b701ae09", "codeword174_sha256_16": "a5675f82762f2950" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 35, "llr_stats": { "count": 174, "avg_abs": 1.958645, "min_abs": 0.001909, "max_abs": 4.389904, "positive": 146, "negative": 28, "zero": 0 }, "source_rank_score": 107.83458, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "967cb52d8f49fa2f", "codeword174_sha256_16": "4e74d4ad99e81b39" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.889166, "min_abs": 0.023337, "max_abs": 4.389904, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 107.556664, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "75d9cca113318b71", "codeword174_sha256_16": "5b3a16c7d8de82d0" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.889166, "min_abs": 0.023337, "max_abs": 4.389904, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 107.556664, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "c6a1e6c5b701ae09", "codeword174_sha256_16": "92bf3b362ca2fc1d" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 31, "offsets": { "start_offset_s": 0.09, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.89, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58680, "start_seconds": 4.89, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:31" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.305805, "min_abs": 0.009668, "max_abs": 4.051845, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 109.22322, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "e63e2dff4d094385", "codeword174_sha256_16": "111c5c6e6c16fbd1" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.305805, "min_abs": 0.009668, "max_abs": 4.051845, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 109.22322, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "e63e2dff4d094385", "codeword174_sha256_16": "111c5c6e6c16fbd1" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 125, "llr_stats": { "count": 174, "avg_abs": 1.239198, "min_abs": 0.000225, "max_abs": 3.772346, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 104.956792, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "cf4abb6a65fe7e7c", "codeword174_sha256_16": "b5adfbc8c1e943cd" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.713292, "min_abs": 0.008399, "max_abs": 3.772346, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 124.853168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "78045427f8b643b0", "codeword174_sha256_16": "937e096a3d463604" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.850344, "min_abs": 0.008399, "max_abs": 4.04042, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 117.401376, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "78045427f8b643b0", "codeword174_sha256_16": "937e096a3d463604" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 135, "llr_stats": { "count": 174, "avg_abs": 1.796418, "min_abs": 0.031925, "max_abs": 3.772346, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 107.185672, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "c0dca813515c5608", "codeword174_sha256_16": "dae498783f10cdea" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.713292, "min_abs": 0.008399, "max_abs": 3.772346, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.853168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "78045427f8b643b0", "codeword174_sha256_16": "937e096a3d463604" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.713292, "min_abs": 0.008399, "max_abs": 3.772346, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.853168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "78045427f8b643b0", "codeword174_sha256_16": "937e096a3d463604" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 133, "llr_stats": { "count": 174, "avg_abs": 1.713292, "min_abs": 0.008399, "max_abs": 3.772346, "positive": 43, "negative": 131, "zero": 0 }, "source_rank_score": 106.853168, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "78045427f8b643b0", "codeword174_sha256_16": "937e096a3d463604" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 37, "offsets": { "start_offset_s": 0.09, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.89, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58680, "start_seconds": 4.89, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:37" }, "best_row": { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 2.306334, "min_abs": 0.004878, "max_abs": 4.045851, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 101.225336, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9bb19c064bcec63", "codeword174_sha256_16": "fd5332baa35f631d" }, "top_rows": [ { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 84, "llr_stats": { "count": 174, "avg_abs": 2.306334, "min_abs": 0.004878, "max_abs": 4.045851, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 101.225336, "syndrome_weight": 24, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9bb19c064bcec63", "codeword174_sha256_16": "fd5332baa35f631d" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 1.32816, "min_abs": 0.00017, "max_abs": 4.045851, "positive": 131, "negative": 43, "zero": 0 }, "source_rank_score": 105.31264, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "b6d6785c8ae79391", "codeword174_sha256_16": "21c35b5525d28e22" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.920126, "min_abs": 0.00231, "max_abs": 4.045851, "positive": 137, "negative": 37, "zero": 0 }, "source_rank_score": 107.680504, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "8f597f3674152345", "codeword174_sha256_16": "67d95ed18df97bd6" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 1.659556, "min_abs": 0.003745, "max_abs": 4.01432, "positive": 127, "negative": 47, "zero": 0 }, "source_rank_score": 106.638224, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "928c192124744709", "codeword174_sha256_16": "da3d3dc3f1f60e86" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 53, "llr_stats": { "count": 174, "avg_abs": 1.244368, "min_abs": 0.00017, "max_abs": 4.01432, "positive": 122, "negative": 52, "zero": 0 }, "source_rank_score": 104.977472, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "12b95fa147075493", "codeword174_sha256_16": "e1bf76aa5d353a0b" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 115, "llr_stats": { "count": 174, "avg_abs": 1.194398, "min_abs": 0.000191, "max_abs": 3.780018, "positive": 54, "negative": 120, "zero": 0 }, "source_rank_score": 104.777592, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "6dadc28d307ba7a7", "codeword174_sha256_16": "c2f7a65c3a3074c4" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 132, "llr_stats": { "count": 174, "avg_abs": 1.920126, "min_abs": 0.00231, "max_abs": 4.045851, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 111.680504, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "574cd6fc6bce0dd7", "codeword174_sha256_16": "ad93c86d7bf38473" }, { "variant": "reverse_symbol_order", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.874215, "min_abs": 0.000221, "max_abs": 4.045851, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 111.49686, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "574cd6fc6bce0dd7", "codeword174_sha256_16": "e02bcc851fff16de" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 39, "offsets": { "start_offset_s": 0.09, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.045 }, "anchor_applied": { "start_seconds": 4.89, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.92, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58680, "start_seconds": 4.89, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.92, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:39" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.260058, "min_abs": 0.004711, "max_abs": 3.879143, "positive": 56, "negative": 118, "zero": 0 }, "source_rank_score": 105.040232, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "52864d19425ece47", "codeword174_sha256_16": "b7770fab709aa574" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 113, "llr_stats": { "count": 174, "avg_abs": 1.260058, "min_abs": 0.004711, "max_abs": 3.879143, "positive": 56, "negative": 118, "zero": 0 }, "source_rank_score": 105.040232, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "52864d19425ece47", "codeword174_sha256_16": "b7770fab709aa574" }, { "variant": "lab_mask_xor_preview", "transform": "lsb_within_each_tone+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 87, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 101.455968, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "8662a06ff0d6dc1d", "codeword174_sha256_16": "c824d47b54a64594" }, { "variant": "raw_msb_symbol_order", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 127.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" }, { "variant": "lsb_within_each_tone", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 119.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 109.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 109.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 109.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 32, "llr_stats": { "count": 174, "avg_abs": 2.363992, "min_abs": 0.010306, "max_abs": 4.139371, "positive": 143, "negative": 31, "zero": 0 }, "source_rank_score": 109.455968, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c4a3dd52502f75a", "codeword174_sha256_16": "fc709bd42bf70453" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 13, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 3.5, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1028.5, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:13" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.189787, "min_abs": 0.003369, "max_abs": 3.239839, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.759148, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "18e408df8b7088eb", "codeword174_sha256_16": "637b60031dda7c15" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.189787, "min_abs": 0.003369, "max_abs": 3.239839, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 104.759148, "syndrome_weight": 25, "valid_codeword_hard_decision": false, "message91_sha256_16": "18e408df8b7088eb", "codeword174_sha256_16": "637b60031dda7c15" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 127, "llr_stats": { "count": 174, "avg_abs": 1.214585, "min_abs": 0.005073, "max_abs": 3.249783, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 104.85834, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "18e408df8b7088eb", "codeword174_sha256_16": "159d4394aeba05bd" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 74, "llr_stats": { "count": 174, "avg_abs": 1.108029, "min_abs": 0.017419, "max_abs": 3.914567, "positive": 100, "negative": 74, "zero": 0 }, "source_rank_score": 104.432116, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "2599f14030519483", "codeword174_sha256_16": "fba3ec8a63d90877" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 96, "llr_stats": { "count": 174, "avg_abs": 1.929145, "min_abs": 0.066005, "max_abs": 4.16568, "positive": 140, "negative": 34, "zero": 0 }, "source_rank_score": 99.71658, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "ee9a0ed56c63818c", "codeword174_sha256_16": "5468a175ee86ed1e" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.929145, "min_abs": 0.066005, "max_abs": 4.16568, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 125.71658, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "0ad8753e2726f4fb", "codeword174_sha256_16": "c5a59548f6922a4c" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.679287, "min_abs": 0.066005, "max_abs": 3.914567, "positive": 49, "negative": 125, "zero": 0 }, "source_rank_score": 116.717148, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "0ad8753e2726f4fb", "codeword174_sha256_16": "c5a59548f6922a4c" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.929145, "min_abs": 0.066005, "max_abs": 4.16568, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 107.71658, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "0ad8753e2726f4fb", "codeword174_sha256_16": "c5a59548f6922a4c" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 141, "llr_stats": { "count": 174, "avg_abs": 1.929145, "min_abs": 0.066005, "max_abs": 4.16568, "positive": 34, "negative": 140, "zero": 0 }, "source_rank_score": 107.71658, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "0ad8753e2726f4fb", "codeword174_sha256_16": "c5a59548f6922a4c" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 4, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 2.75, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:4" }, "best_row": { "variant": "raw_msb_symbol_order", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 127.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, "top_rows": [ { "variant": "raw_msb_symbol_order", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 127.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, { "variant": "lsb_within_each_tone", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 119.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 109.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "raw_msb+no_interleaver", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 109.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 109.153772, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "921b6c6ee3f73bf7", "codeword174_sha256_16": "6fc262e6166da69f" }, { "variant": "lab_mask_xor_preview", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 86, "llr_stats": { "count": 174, "avg_abs": 1.6075, "min_abs": 0.018792, "max_abs": 4.020367, "positive": 41, "negative": 133, "zero": 0 }, "source_rank_score": 98.43, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "4c0b7d9708741dab", "codeword174_sha256_16": "5dca1ad45c1f670d" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 137, "llr_stats": { "count": 174, "avg_abs": 1.736756, "min_abs": 0.012377, "max_abs": 4.156154, "positive": 37, "negative": 137, "zero": 0 }, "source_rank_score": 106.947024, "syndrome_weight": 29, "valid_codeword_hard_decision": false, "message91_sha256_16": "f206ff2cb3a94e83", "codeword174_sha256_16": "d2cb98189648a53f" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 2.288443, "min_abs": 0.048119, "max_abs": 4.36961, "positive": 148, "negative": 26, "zero": 0 }, "source_rank_score": 113.153772, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "67b98c824f4ee038", "codeword174_sha256_16": "5306bc6cd2d03406" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 7, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 3.0, "tone_spacing_offset_hz": 0.015 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.89, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1028.0, "tone_spacing_hz": 1.89, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:7" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.76413, "min_abs": 0.00248, "max_abs": 4.16203, "positive": 137, "negative": 37, "zero": 0 }, "source_rank_score": 107.05652, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9cc65e438e4a75e", "codeword174_sha256_16": "86d347e4cf309d9a" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 36, "llr_stats": { "count": 174, "avg_abs": 1.76413, "min_abs": 0.00248, "max_abs": 4.16203, "positive": 137, "negative": 37, "zero": 0 }, "source_rank_score": 107.05652, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "e9cc65e438e4a75e", "codeword174_sha256_16": "86d347e4cf309d9a" }, { "variant": "mapped_lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 144, "llr_stats": { "count": 174, "avg_abs": 2.366842, "min_abs": 0.004374, "max_abs": 4.48302, "positive": 29, "negative": 145, "zero": 0 }, "source_rank_score": 109.467368, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "ba9613f6a417de79", "codeword174_sha256_16": "4c6e56ffc0a00a61" }, { "variant": "mapped_raw_msb+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 130, "llr_stats": { "count": 174, "avg_abs": 1.797029, "min_abs": 0.004156, "max_abs": 4.125536, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 107.188116, "syndrome_weight": 28, "valid_codeword_hard_decision": false, "message91_sha256_16": "c33ef1555b97e502", "codeword174_sha256_16": "96395eb54b9b5868" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 142, "llr_stats": { "count": 174, "avg_abs": 2.022316, "min_abs": 0.004374, "max_abs": 4.48302, "positive": 30, "negative": 144, "zero": 0 }, "source_rank_score": 108.089264, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "85eadda5ee933279", "codeword174_sha256_16": "dd3e3880c290fb9b" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "lsb_within_each_tone+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 144, "llr_stats": { "count": 174, "avg_abs": 1.97756, "min_abs": 0.001838, "max_abs": 4.48302, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 107.91024, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "d03b75984bd588cb", "codeword174_sha256_16": "016862cef9fa0d75" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 129, "llr_stats": { "count": 174, "avg_abs": 1.31118, "min_abs": 5.7e-05, "max_abs": 4.125536, "positive": 44, "negative": 130, "zero": 0 }, "source_rank_score": 105.24472, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "815682423d76ab87", "codeword174_sha256_16": "c6400e08eead342e" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 121, "llr_stats": { "count": 174, "avg_abs": 1.242828, "min_abs": 0.010817, "max_abs": 4.125536, "positive": 47, "negative": 127, "zero": 0 }, "source_rank_score": 104.971312, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "7575b94421742271", "codeword174_sha256_16": "92b2847209b267f4" }, { "variant": "reverse_symbol_order", "transform": "raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 30, "llr_stats": { "count": 174, "avg_abs": 2.366842, "min_abs": 0.004374, "max_abs": 4.48302, "positive": 145, "negative": 29, "zero": 0 }, "source_rank_score": 113.467368, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "43a8d3f963560ac1", "codeword174_sha256_16": "971991e76e98db92" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 32, "offsets": { "start_offset_s": 0.09, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.89, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58680, "start_seconds": 4.89, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:32" }, "best_row": { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 1.742539, "min_abs": 0.000578, "max_abs": 4.060392, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 106.970156, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "860ce09d9dc2df0d", "codeword174_sha256_16": "e5ab101e21fcf648" }, "top_rows": [ { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 1.742539, "min_abs": 0.000578, "max_abs": 4.060392, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 106.970156, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "860ce09d9dc2df0d", "codeword174_sha256_16": "e5ab101e21fcf648" }, { "variant": "mapped_raw_msb+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 42, "llr_stats": { "count": 174, "avg_abs": 1.699652, "min_abs": 0.004875, "max_abs": 4.060392, "positive": 130, "negative": 44, "zero": 0 }, "source_rank_score": 106.798608, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "860ce09d9dc2df0d", "codeword174_sha256_16": "e5ab101e21fcf648" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.803172, "min_abs": 0.049536, "max_abs": 3.834545, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 125.212688, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.950249, "min_abs": 0.024011, "max_abs": 4.065687, "positive": 31, "negative": 143, "zero": 0 }, "source_rank_score": 117.800996, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.803172, "min_abs": 0.049536, "max_abs": 3.834545, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 107.212688, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+no_interleaver", "transform": "raw_msb+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.803172, "min_abs": 0.049536, "max_abs": 3.834545, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 107.212688, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" }, { "variant": "mapped_lsb_within_each_tone+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.803172, "min_abs": 0.049536, "max_abs": 3.834545, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 107.212688, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" }, { "variant": "mapped_raw_msb+no_interleaver", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 131, "llr_stats": { "count": 174, "avg_abs": 1.803172, "min_abs": 0.049536, "max_abs": 3.834545, "positive": 42, "negative": 132, "zero": 0 }, "source_rank_score": 107.212688, "syndrome_weight": 27, "valid_codeword_hard_decision": false, "message91_sha256_16": "90d23a0ae7e11e20", "codeword174_sha256_16": "61f8634e446972ef" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 20, "offsets": { "start_offset_s": 0.06, "base_freq_offset_hz": 2.75, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.859999999999999, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 58320, "start_seconds": 4.86, "base_freq_hz": 1027.75, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:20" }, "best_row": { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 40, "llr_stats": { "count": 174, "avg_abs": 1.654305, "min_abs": 0.021019, "max_abs": 3.975782, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 106.61722, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "c4d4ee11f559aeb5", "codeword174_sha256_16": "11c10d0d45c477e4" }, "top_rows": [ { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+no_interleaver", "transform": "lsb_within_each_tone+no_interleaver", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 40, "llr_stats": { "count": 174, "avg_abs": 1.654305, "min_abs": 0.021019, "max_abs": 3.975782, "positive": 134, "negative": 40, "zero": 0 }, "source_rank_score": 106.61722, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "c4d4ee11f559aeb5", "codeword174_sha256_16": "11c10d0d45c477e4" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+no_interleaver", "transform": "ft8_gray_alt_high_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 148, "llr_stats": { "count": 174, "avg_abs": 1.614129, "min_abs": 0.000212, "max_abs": 4.060512, "positive": 23, "negative": 151, "zero": 0 }, "source_rank_score": 106.456516, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "3bb3d85bf20ab067", "codeword174_sha256_16": "bbb9edf43d37b383" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+no_interleaver", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 148, "llr_stats": { "count": 174, "avg_abs": 1.606431, "min_abs": 0.002254, "max_abs": 4.060512, "positive": 23, "negative": 151, "zero": 0 }, "source_rank_score": 106.425724, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "645ce0057ab189e4", "codeword174_sha256_16": "67bb4f055ec3ccd9" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 46, "llr_stats": { "count": 174, "avg_abs": 1.392733, "min_abs": 0.001535, "max_abs": 3.988301, "positive": 138, "negative": 36, "zero": 0 }, "source_rank_score": 105.570932, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "9da4ddf486c4cd82", "codeword174_sha256_16": "42026394f5f8bf4b" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 46, "llr_stats": { "count": 174, "avg_abs": 1.314552, "min_abs": 0.003518, "max_abs": 3.988301, "positive": 135, "negative": 39, "zero": 0 }, "source_rank_score": 105.258208, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "9da4ddf486c4cd82", "codeword174_sha256_16": "42026394f5f8bf4b" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 48, "llr_stats": { "count": 174, "avg_abs": 1.20974, "min_abs": 0.006552, "max_abs": 3.975782, "positive": 126, "negative": 48, "zero": 0 }, "source_rank_score": 104.83896, "syndrome_weight": 30, "valid_codeword_hard_decision": false, "message91_sha256_16": "0f68e23dedbcebcf", "codeword174_sha256_16": "28d4156dd8362fdc" }, { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "lsb_within_each_tone+ft8_bitrev_deinterleave_rx_to_codeword", "mapping_meta": { "tone_mapping": "lsb_within_each_tone", "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 29, "llr_stats": { "count": 174, "avg_abs": 1.914595, "min_abs": 0.011069, "max_abs": 4.060512, "positive": 150, "negative": 24, "zero": 0 }, "source_rank_score": 107.65838, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "3e6b223e41b812c4", "codeword174_sha256_16": "3a704799b5a17668" }, { "variant": "lab_mask_xor_preview", "transform": "raw_msb+no_interleaver+inverted_bits", "mapping_meta": { "tone_mapping": "raw_msb", "interleaver": "none", "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 95, "llr_stats": { "count": 174, "avg_abs": 2.288777, "min_abs": 0.028218, "max_abs": 4.506179, "positive": 26, "negative": 148, "zero": 0 }, "source_rank_score": 101.155108, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "478f4d5f2ea10adb", "codeword174_sha256_16": "b0e0b25e5850deb1" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] }, { "combination_index": 2, "offsets": { "start_offset_s": 0.03, "base_freq_offset_hz": 2.5, "tone_spacing_offset_hz": 0.03 }, "anchor_applied": { "start_seconds": 4.83, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400 }, "pipeline_ok": true, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "sync_candidate": { "start_sample": 57960, "start_seconds": 4.83, "base_freq_hz": 1027.5, "tone_spacing_hz": 1.905, "nsps": 6400, "candidate_score": null, "costas_hits": null, "avg_margin_db": null, "anchor_source": "step42_timing_boundary_sweep:2" }, "best_row": { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.435602, "min_abs": 0.001426, "max_abs": 4.091276, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 105.742408, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "5f214ae2f0fb2f36", "codeword174_sha256_16": "64ae541c28b71f69" }, "top_rows": [ { "variant": "mapped_ft8_gray_primary_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.435602, "min_abs": 0.001426, "max_abs": 4.091276, "positive": 141, "negative": 33, "zero": 0 }, "source_rank_score": 105.742408, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "5f214ae2f0fb2f36", "codeword174_sha256_16": "64ae541c28b71f69" }, { "variant": "mapped_ft8_gray_alt_high_demap_msb_input+ft8_bitrev_deinterleave_rx_to_codeword", "transform": "ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "interleave_codeword_to_rx_inverse", "order_len": 174 }, "bit_count": 174, "hard_weight_174": 38, "llr_stats": { "count": 174, "avg_abs": 1.384195, "min_abs": 0.000995, "max_abs": 4.091276, "positive": 139, "negative": 35, "zero": 0 }, "source_rank_score": 105.53678, "syndrome_weight": 26, "valid_codeword_hard_decision": false, "message91_sha256_16": "5f214ae2f0fb2f36", "codeword174_sha256_16": "64ae541c28b71f69" }, { "variant": "mapped_ft8_gray_primary_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.194786, "min_abs": 0.000574, "max_abs": 3.71937, "positive": 55, "negative": 119, "zero": 0 }, "source_rank_score": 104.779144, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "df9a107315483691", "codeword174_sha256_16": "9987222aa18746e4" }, { "variant": "mapped_ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_interleave_codeword_to_rx_inverse", "transform": "ft8_gray_alt_high_demap_lsb_input+ft8_bitrev_deinterleave_rx_to_codeword+inverted_bits", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "ft8_bitrev", "direction": "deinterleave_rx_to_codeword", "order_len": 174, "polarity": "inverted" }, "bit_count": 174, "hard_weight_174": 123, "llr_stats": { "count": 174, "avg_abs": 1.137638, "min_abs": 0.000202, "max_abs": 3.575371, "positive": 58, "negative": 116, "zero": 0 }, "source_rank_score": 104.550552, "syndrome_weight": 31, "valid_codeword_hard_decision": false, "message91_sha256_16": "df9a107315483691", "codeword174_sha256_16": "9987222aa18746e4" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_primary_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 1.971302, "min_abs": 0.003869, "max_abs": 4.310037, "positive": 150, "negative": 24, "zero": 0 }, "source_rank_score": 125.885208, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "7eb8521bc797d417", "codeword174_sha256_16": "57e8972b644f146e" }, { "variant": "raw_msb_symbol_order", "transform": "ft8_gray_alt_high_demap_msb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": false, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 1.909894, "min_abs": 0.003655, "max_abs": 4.310037, "positive": 146, "negative": 28, "zero": 0 }, "source_rank_score": 125.639576, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "7eb8521bc797d417", "codeword174_sha256_16": "57e8972b644f146e" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_primary_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_primary", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 1.768455, "min_abs": 0.003869, "max_abs": 3.884903, "positive": 136, "negative": 38, "zero": 0 }, "source_rank_score": 117.07382, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "7eb8521bc797d417", "codeword174_sha256_16": "57e8972b644f146e" }, { "variant": "lsb_within_each_tone", "transform": "ft8_gray_alt_high_demap_lsb_input+no_interleaver", "mapping_meta": { "tone_mapping": "ft8_gray_alt_high", "gray_direction": "inverse_observed_to_plain", "reverse_bits_within_tone_before_gray": true, "interleaver": "none" }, "bit_count": 174, "hard_weight_174": 26, "llr_stats": { "count": 174, "avg_abs": 1.707047, "min_abs": 0.003655, "max_abs": 3.884903, "positive": 132, "negative": 42, "zero": 0 }, "source_rank_score": 116.828188, "syndrome_weight": 32, "valid_codeword_hard_decision": false, "message91_sha256_16": "7eb8521bc797d417", "codeword174_sha256_16": "57e8972b644f146e" } ], "warnings": [ "Step 42 JS8 Costas guard uses leading-only Costas exclusion by default to preserve 58 data symbols / 174 soft bits on JS8Lab windows; full FT8 middle/trailing exclusion remains diagnostic-only.", "Step 42 profile-anchor guard: FEC symbols were extracted from the selected profile sync anchor instead of re-running an independent sync search.", "Step 42 prepares LDPC/FEC input candidates and an LDPC probe harness only; it does not yet run final real JS8 LDPC decode or unpack text.", "Step 42 does not decode JS8 text yet. It probes FT8-style Gray de-mapping, bit order and 174-bit interleaver candidates for real LDPC/FEC integration.", "lab_mask_xor_preview is only a repeatable diagnostic mask, not a confirmed JS8 whitening implementation." ] } ], "outputs": { "timing_boundary_sweep_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step42_timing_boundary_sweep.json", "timing_best_candidate_json": "/decoders/js8_decoder/runtime/timing_boundary_sweep/step42_best_timing_fec_candidate.json", "checkpoint_json": "/decoders/js8_decoder/logs/20260527T055654Z_real_run_timing_boundary_sweep_output.json" }, "decodes": [], "warnings": [ "Step 42 expands the Step36 edge hit and exports the best timing candidate for downstream LDPC soft-decode.", "No JS8 text unpack or CRC validation is performed yet.", "No valid LDPC codeword found is a diagnostic warning, not a hard command failure." ], "next_action": "Use outputs.timing_best_candidate_json for LDPC matrix/soft decode. If syndrome is still far from 0, continue interleaver/LLR and symbol-boundary tuning around the best_candidate." }