Ahoy!
I'm running MS Workstation 6.9.3 and attempting to auto tune a Varian 300-MS triple quad. In the auto tune dialog, the polarity is set to "negative" and the "positive" option is greyed out. It needs to be in positive mode to tune. This has been set correctly in the past and I can't figure out how to change the setting back to positive. Any suggestions would be very much appreciated.

Thanks,
Michael