/// <summary>
/// Sets the output state for the specified channel on the external source
///
/// OUTput[n]:STATe
/// </summary>
/// <param name="extSource">the EXTSOURCE object</param>
/// <param name="channel">specified channel to use</param>
/// <param name="state">ON or OFF value</param>
public void SetExtSrcOutputState(IEXTSOURCE extSource, string channel, string state)
{
extSource.SetExtSrcOutputState(channel, state);
}