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use max harmonic frequency for limiting span when harmonic mixing enabled

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This commit is contained in:
Jan Käberich 2021-04-17 23:22:14 +02:00
parent 9db83a608d
commit 26dc68fb73
1 changed files with 4 additions and 3 deletions
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7
Software/PC_Application/VNA/vna.cpp
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@ -708,15 +708,16 @@ void VNA::SetCenterFreq(double freq)
void VNA::SetSpan(double span)
{
auto maxFreq = Preferences::getInstance().Acquisition.harmonicMixing ? Device::Info().limits_maxFreqHarmonic : Device::Info().limits_maxFreq;
auto old_center = (settings.f_start + settings.f_stop) / 2;
if(old_center < Device::Info().limits_minFreq + span / 2) {
// would shift start frequency below minimum
settings.f_start = Device::Info().limits_minFreq;
settings.f_stop = Device::Info().limits_minFreq + span;
} else if(old_center > Device::Info().limits_maxFreq - span / 2) {
} else if(old_center > maxFreq - span / 2) {
// would shift stop frequency above maximum
settings.f_start = Device::Info().limits_maxFreq - span;
settings.f_stop = Device::Info().limits_maxFreq;
settings.f_start = maxFreq - span;
settings.f_stop = maxFreq;
} else {
settings.f_start = old_center - span / 2;
settings.f_stop = settings.f_start + span;