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Fix frequency band bug

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OneOfEleven
2023-09-17 11:06:42 +01:00
parent 19fa9718f5
commit 628f00a939
7 changed files with 68 additions and 17 deletions
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22
app/app.c
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@ -447,19 +447,33 @@ void APP_StartListening(FUNCTION_Type_t Function)
if (gRxVfo->IsAM)
{
// RX AF level
BK4819_WriteRegister(BK4819_REG_48, 0xB3A8);
// PGA + MIXER + LNA + LNA_SHORT
BK4819_WriteRegister(BK4819_REG_13, 3u | (3u << 3) | (2u << 5) | (3u << 8));
// help improve AM RX audio by reducing the PGA gain
//
// I think the solution is to set the RX AGC to limit the front end gain
//
// LNA_SHORT .. 0dB
// LNA ........ 14dB
// MIXER ...... 0dB
// PGA ........ -15dB
//
BK4819_WriteRegister(BK4819_REG_13, (3u << 8) | (2u << 5) | (3u << 3) | (3u << 0));
gNeverUsed = 0;
}
else
{
// RX AF level
BK4819_WriteRegister(BK4819_REG_48, 0xB000 | (gEeprom.VOLUME_GAIN << 4) | (gEeprom.DAC_GAIN << 0));
// PGA + MIXER + LNA + LNA_SHORT
BK4819_WriteRegister(BK4819_REG_13, 0x03BE);
// LNA_SHORT .. 0dB
// LNA ........ 14dB
// MIXER ...... 0dB
// PGA ........ -3dB
//
BK4819_WriteRegister(BK4819_REG_13, (3u << 8) | (2u << 5) | (3u << 3) | (6u << 0));
}
#ifdef ENABLE_VOICE