private void ControlsToData()
{
if (_supportedClockSources == null)
_supportedClockSources = new SupportedClockSources();
_supportedClockSources.backplane = chkBackplane.Checked;
_supportedClockSources.@internal = chkInternal.Checked;
_supportedClockSources.external = chkExternal.Checked;
}