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Add narrowband FM preemphasis settings

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This commit is contained in:
Jon Beniston
2020-09-23 20:16:00 +01:00
committed by f4exb
parent 79279f10a5
commit a92155cee5
4 changed files with 84 additions and 11 deletions
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sdrgui/gui/fmpreemphasisdialog.cpp
+37
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@@ -51,6 +51,7 @@ void FMPreemphasisDialog::on_tau_valueChanged(double value)
// Set corresponding low frequency
ui->lowFreq->blockSignals(true);
ui->lowFreq->setValue(1.0/(2.0*M_PI*(value/TAU_SCALE)));
updateCombo();
ui->lowFreq->blockSignals(false);
}
@@ -59,5 +60,41 @@ void FMPreemphasisDialog::on_lowFreq_valueChanged(double value)
// Set corresponding tau
ui->tau->blockSignals(true);
ui->tau->setValue(TAU_SCALE*1.0/(2.0*M_PI*value));
updateCombo();
ui->tau->blockSignals(false);
}
void FMPreemphasisDialog::updateCombo()
{
double value = ui->tau->value();
if (value == 531.0)
ui->preset->setCurrentIndex(0);
else if (value == 75.0)
ui->preset->setCurrentIndex(1);
else if (value == 50.0)
ui->preset->setCurrentIndex(2);
else
ui->preset->setCurrentIndex(3);
}
void FMPreemphasisDialog::on_preset_currentIndexChanged(int value)
{
if (value == 0)
{
// Narrowband FM
ui->lowFreq->setValue(300.0);
ui->highFreq->setValue(3000.0);
}
else if (value == 1)
{
// Broadcast FM (US)
ui->tau->setValue(75.0);
ui->highFreq->setValue(12000.0);
}
else if (value == 2)
{
// Broadcast FM (EU)
ui->tau->setValue(50.0);
ui->highFreq->setValue(12000.0);
}
}