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Lab064: measure OTA level linearity at TX VGA 10 dB

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LittleSam129
2026-09-15 12:03:48 +03:00
parent 4437917465
commit cff226e0bf
12 changed files with 2831 additions and 0 deletions
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221
data/processed/lab064/preparation.json Normal file
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{
"lab": "Lab064",
"stage": "PREPARATION_ONLY",
"rf_tx_count": 0,
"head": "4437917465274257ff0ca5d3c269029da45de3ec",
"parameters": {
"rf_frequency_hz": 1400000000,
"sample_rate_hz": 8000000,
"symbol_rate": 20000,
"samples_per_symbol": 400,
"digital_carrier_hz": 50000,
"rrc_rolloff": 0.35,
"rrc_span_symbols": 10,
"prbs": "PRBS7 x^7+x^6+1, deterministic initial state",
"full_phy_packet": false,
"tx_vga_db": 10,
"rx_lna_db": 24,
"rx_vga_db": 24,
"rf_amplifier": false,
"bias_tee": false,
"geometry": {
"frequency_hz": 1400000000,
"physical_path": "MASTER TX near window -> LOS indoor -> SLAVE RX on desk",
"path_confirmed": true,
"tx_antenna": "existing 1400 MHz antenna near window",
"rx_antenna": "existing 1400 MHz antenna on desk",
"distance_m": 1.2,
"orientation": "same polarization; fixed during preflight and RF session",
"visibility": "LOS indoor"
},
"clock_path": "10 MHz TCXO -> MASTER -> MASTER CLKOUT -> SLAVE CLKIN",
"levels_db_relative_nominal": [
-18.0,
-12.0,
-6.0,
0.0
]
},
"segments": [
{
"label": "L0",
"level_db": -18.0,
"start_sample": 800000,
"samples": 800000,
"duration_seconds": 0.1,
"analysis_start_sample": 808400,
"analysis_samples": 783200,
"metrics": {
"samples": 800000,
"mean_i": -9.625e-05,
"mean_q": 2.75e-05,
"power_code2": 30.87065625,
"ac_power_code2": 30.870656239979688,
"rms_code": 5.556136809870686,
"peak_magnitude_code": 9.219544457292887,
"max_abs_i": 9.0,
"max_abs_q": 9.0,
"papr_db": 4.398730638796093,
"clipped_components_fraction": 0.0,
"clipped_samples_fraction": 0.0,
"symbol_energy_code2_seconds": 0.0015435328125,
"requested_relative_power_db": -18.0,
"tx_rms_code": 5.556136809870686,
"tx_peak_abs_i_code": 9.0,
"tx_peak_abs_q_code": 9.0,
"tx_peak_magnitude_code": 9.219544457292887,
"digital_clipping": false,
"actual_relative_power_db": -17.97368512020099
}
},
{
"label": "L1",
"level_db": -12.0,
"start_sample": 2000000,
"samples": 800000,
"duration_seconds": 0.1,
"analysis_start_sample": 2008400,
"analysis_samples": 783200,
"metrics": {
"samples": 800000,
"mean_i": -5e-05,
"mean_q": 5e-05,
"power_code2": 122.2567675,
"ac_power_code2": 122.25676749499999,
"rms_code": 11.056978226441435,
"peak_magnitude_code": 17.804493814764857,
"max_abs_i": 17.0,
"max_abs_q": 17.0,
"papr_db": 4.1378635346865025,
"clipped_components_fraction": 0.0,
"clipped_samples_fraction": 0.0,
"symbol_energy_code2_seconds": 0.006112838375,
"requested_relative_power_db": -12.0,
"tx_rms_code": 11.056978226441435,
"tx_peak_abs_i_code": 17.0,
"tx_peak_abs_q_code": 17.0,
"tx_peak_magnitude_code": 17.804493814764857,
"digital_clipping": false,
"actual_relative_power_db": -11.99641465105681
},
"tx_input_difference_from_previous_db": 5.9772704691441785
},
{
"label": "L2",
"level_db": -6.0,
"start_sample": 3200000,
"samples": 800000,
"duration_seconds": 0.1,
"analysis_start_sample": 3208400,
"analysis_samples": 783200,
"metrics": {
"samples": 800000,
"mean_i": 5.625e-05,
"mean_q": 2.625e-05,
"power_code2": 486.5064875,
"ac_power_code2": 486.50648749614686,
"rms_code": 22.05689206347984,
"peak_magnitude_code": 35.12833614050059,
"max_abs_i": 34.0,
"max_abs_q": 35.0,
"papr_db": 4.0422652379446395,
"clipped_components_fraction": 0.0,
"clipped_samples_fraction": 0.0,
"symbol_energy_code2_seconds": 0.024325324375,
"requested_relative_power_db": -6.0,
"tx_rms_code": 22.05689206347984,
"tx_peak_abs_i_code": 34.0,
"tx_peak_abs_q_code": 35.0,
"tx_peak_magnitude_code": 35.12833614050059,
"digital_clipping": false,
"actual_relative_power_db": -5.998257379520232
},
"tx_input_difference_from_previous_db": 5.998157271536577
},
{
"label": "L3",
"level_db": 0.0,
"start_sample": 4400000,
"samples": 800000,
"duration_seconds": 0.1,
"analysis_start_sample": 4408400,
"analysis_samples": 783200,
"metrics": {
"samples": 800000,
"mean_i": 8.25e-05,
"mean_q": 0.00011125,
"power_code2": 1936.04021375,
"ac_power_code2": 1936.0402137308172,
"rms_code": 44.00045697205883,
"peak_magnitude_code": 69.6419413859206,
"max_abs_i": 69.0,
"max_abs_q": 69.0,
"papr_db": 3.9882736474748155,
"clipped_components_fraction": 0.0,
"clipped_samples_fraction": 0.0,
"symbol_energy_code2_seconds": 0.0968020106875,
"requested_relative_power_db": 0.0,
"tx_rms_code": 44.00045697205883,
"tx_peak_abs_i_code": 69.0,
"tx_peak_abs_q_code": 69.0,
"tx_peak_magnitude_code": 69.6419413859206,
"digital_clipping": false,
"actual_relative_power_db": 0.0
},
"tx_input_difference_from_previous_db": 5.998257379520232
}
],
"leading_zero_samples": 800000,
"gap_samples": 400000,
"trailing_zero_samples": 800000,
"tx_samples": 6000000,
"tx_bytes": 12000000,
"tx_duration_seconds": 0.75,
"tx_sha256": "fa260719659b2984fe29588238415622cd75c6daefec6cc9130ba1bf851bd3f9",
"rx_samples": 16000000,
"rx_duration_seconds": 2.0,
"rx_lead_seconds": 0.5,
"automatic_retry": false,
"tx_command_prepared_not_run": [
"C:\\Users\\user\\Tools\\HackRF\\Library\\bin\\hackrf_transfer.exe",
"-d",
"000000000000000097c063dc323b97d3",
"-t",
"C:\\Users\\user\\Desktop\\projects\\SDR_Rover\\data\\raw\\lab064\\tx_level_staircase.cs8",
"-f",
"1400000000",
"-s",
"8000000",
"-n",
"6000000",
"-x",
"10",
"-a",
"0",
"-p",
"0",
"-B"
],
"rx_command_prepared_not_run": [
"C:\\Users\\user\\Tools\\HackRF\\Library\\bin\\hackrf_transfer.exe",
"-d",
"000000000000000097c063dc2e5327d3",
"-r",
"C:\\Users\\user\\Desktop\\projects\\SDR_Rover\\data\\raw\\lab064\\rx_stream.cs8",
"-f",
"1400000000",
"-s",
"8000000",
"-n",
"16000000",
"-l",
"24",
"-g",
"24",
"-a",
"0",
"-p",
"0",
"-B"
]
}