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Activating TX Low Pass Filter in Second IF IC (#1470)

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* Activating TX Low Pass Filter in Second IF IC
* solving PR conversation revisions
* Final TX LPF decision for ADSB_TX
* Small comments correction.
* Added set TX LPF also  in APRS, BurgerPgr,Jammer
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Brumi-2021 2023-10-08 17:50:31 +02:00 • committed by GitHub
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commit defb934c3f
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19 changed files with 81 additions and 18 deletions
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4
firmware/application/apps/ui_adsb_tx.cpp
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@ -296,6 +296,10 @@ void ADSBTxView::generate_frames() {
void ADSBTxView::start_tx() {
generate_frames();
/* Already tested , with SDR Angel + another Hackrf RX and dump1090 + SDR RLT. Final conclusion is TX LPF 6 Mhz is
* the best settings to fulfill ADSB transponder spectrum mask requirements (<=-20 dB's at +-7Mhz , <=-40 dB's at +-23Mhz )
* and not showing any ADSB data decoding degradation.*/
transmitter_model.set_baseband_bandwidth(6'000'000); // best settings for ADSB TX.
transmitter_model.enable();
baseband::set_adsb();