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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
parent 5a850984b9
commit defb934c3f
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19 changed files with 81 additions and 18 deletions
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4
firmware/application/apps/ui_mictx.cpp
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@ -87,6 +87,10 @@ void MicTXView::set_tx(bool enable) {
transmitting = true;
configure_baseband();
transmitter_model.set_target_frequency(tx_frequency); // Now, no need: transmitter_model.set_tx_gain(tx_gain), nor (rf_amp);
/* The max. Power Spectrum Densitiy in WFM with High tone mod level (80%) and high 32kHZ subtone as fmod. with max fdeviation 150k ,
BW aprox = 2 *(150K + 32K) = 364khz, then we just select the minimum TX LPF 1M75. */
transmitter_model.set_baseband_bandwidth(1'750'000);
transmitter_model.enable();
portapack::pin_i2s0_rx_sda.mode(3); // This is already done in audio::init but gets changed by the CPLD overlay reprogramming
} else {