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fix SPEC mode in app (#1191)

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Co-authored-by: GullCode <gullradriel@hotmail.com>
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gullradriel 2023-06-26 01:52:40 +02:00 committed by GitHub
parent e14fa5eab0
commit b5ea81cf96
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37
firmware/application/apps/ui_level.cpp
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@ -199,6 +199,43 @@ size_t LevelView::change_mode(freqman_index_t new_mod) {
field_bw.on_change = [this](size_t, OptionsField::value_t n) { receiver_model.set_wfm_configuration(n); };
text_ctcss.set(" ");
break;
case SPEC_MODULATION:
freqman_set_bandwidth_option(new_mod, field_bw);
baseband::run_image(portapack::spi_flash::image_tag_capture);
receiver_model.set_modulation(ReceiverModel::Mode::Capture);
field_bw.set_by_value(0);
field_bw.on_change = [this](size_t, OptionsField::value_t sampling_rate) {
uint32_t anti_alias_baseband_bandwidth_filter = 2500000;
switch (sampling_rate) { // we use the var fs (sampling_rate) , to set up BPF aprox < fs_max/2 by Nyquist theorem.
case 0 ... 2000000: // BW Captured range (0 <= 250kHz max ) fs = 8 x 250 kHz
anti_alias_baseband_bandwidth_filter = 1750000; // Minimum BPF MAX2837 for all those lower BW options.
break;
case 4000000 ... 6000000: // BW capture range (500k ... 750kHz max ) fs_max = 8 x 750kHz = 6Mhz
// BW 500k ... 750kHz , ex. 500kHz (fs = 8*BW = 4Mhz) , BW 600kHz (fs = 4,8Mhz) , BW 750 kHz (fs = 6Mhz)
anti_alias_baseband_bandwidth_filter = 2500000; // in some IC MAX2837 appear 2250000 , but both works similar.
break;
case 8800000: // BW capture 1,1Mhz fs = 8 x 1,1Mhz = 8,8Mhz . (1Mhz showed slightly higher noise background).
anti_alias_baseband_bandwidth_filter = 3500000;
break;
case 14000000: // BW capture 1,75Mhz , fs = 8 x 1,75Mhz = 14Mhz
// good BPF, good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
anti_alias_baseband_bandwidth_filter = 5000000;
break;
case 16000000: // BW capture 2Mhz , fs = 8 x 2Mhz = 16Mhz
// good BPF, good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
anti_alias_baseband_bandwidth_filter = 6000000;
break;
case 20000000: // BW capture 2,5Mhz , fs= 8 x 2,5 Mhz = 20Mhz
// good BPF, good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
anti_alias_baseband_bandwidth_filter = 7000000;
break;
default: // BW capture 2,75Mhz, fs = 8 x 2,75Mhz= 22Mhz max ADC sampling) and others.
// We tested also 9Mhz FPB stightly too much noise floor, better 8Mhz
anti_alias_baseband_bandwidth_filter = 8000000;
}
receiver_model.set_sampling_rate(sampling_rate);
receiver_model.set_baseband_bandwidth(anti_alias_baseband_bandwidth_filter);
};
default:
break;
}