/// <summary>
/// Sets the sampling frequency value for the specified channel on the external source
///
/// SOURce[n]:FREQuency:CW
/// </summary>
/// <param name="extSource">the EXTSOURCE object</param>
/// <param name="channel">specified channel to use</param>
/// <param name="freqValue">sampling frequency value</param>
public void SetExtSrcFreq(IEXTSOURCE extSource, string channel, string freqValue)
{
extSource.SetExtSrcFreq(channel, freqValue);
}