Bruce,
?
There's clearly a fault here as there is no signal present to adjust. I've set out more complete info on this issue in the thread entitled?
"8566B Can't Calibrate" if you have the time to read through it.
?
Seems there's some sort of issue with the attenuators as I only get any kind of signal when I'm not set to 0dB or 10dB attenuation - and of course 10dB is the default attenuation during the calibration procedure!
Jinxie