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ATV modulator: corrected FM modulation

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f4exb 2019-11-27 03:20:56 +01:00
parent a5c5790b6f
commit 1d2bcf95f5
1 changed files with 3 additions and 3 deletions
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6
plugins/channeltx/modatv/atvmodsource.cpp
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@ -178,9 +178,9 @@ void ATVModSource::modulateSample()
switch (m_settings.m_atvModulation) switch (m_settings.m_atvModulation)
{ {
case ATVModSettings::ATVModulationFM: // FM half bandwidth deviation case ATVModSettings::ATVModulationFM: // FM half bandwidth deviation
m_modPhasor += (t - 0.5f) * m_settings.m_fmExcursion * 2.0f * M_PI; m_modPhasor += (t - 0.5f) * m_settings.m_fmExcursion * M_PI;
if (m_modPhasor > 2.0f * M_PI) m_modPhasor -= 2.0f * M_PI; // limit growth if (m_modPhasor > 2.0f * M_PI) m_modPhasor -= 2.0f * M_PI; // limit growth
if (m_modPhasor < 2.0f * M_PI) m_modPhasor += 2.0f * M_PI; // limit growth if (m_modPhasor < 0) m_modPhasor += 2.0f * M_PI; // limit growth
m_modSample.real(cos(m_modPhasor) * m_settings.m_rfScalingFactor); // -1 dB m_modSample.real(cos(m_modPhasor) * m_settings.m_rfScalingFactor); // -1 dB
m_modSample.imag(sin(m_modPhasor) * m_settings.m_rfScalingFactor); m_modSample.imag(sin(m_modPhasor) * m_settings.m_rfScalingFactor);
break; break;