Hi! I've got an 83650 signal generator that's starting to get slightly anemic in power level right below 20GHz (8dBm -- it used to be 12 or 13dBm). I went through the YTM bias/tracking calibration and YTF tracking calibration procedures, but wasn't able to improve the performance. I suspect the YTM. In any case, as a quick fix I've been enabling the doubler amplifier in the 13.5-20GHz band, which gives me plenty of power for my needs. It's annoying to have to do this every time I reset the instrument (or a script resets it), as the default doubler amplifier configuration is AUTO rather than ON, and the AUTO configuration turns off the amplifier in the 13.5-20GHz band. The documentation for Doubler Amp Mode AUTO says:
"The doubler has an integral amplifier whose operation is controlled by the instrument firmware. The use of the amplifier depends on the frequency of operation and on the calibration constants set at the factory. The instrument defaults after preset to this automatic mode of operation which is the speci fied operation. This softkey has no eff ect on instruments without a doubler."
I would like to configure AUTO mode to enable the doubler in the 13.5-20GHz band, and the description suggests that this might be possible, but I haven't been able to figure out which calibration constants I should edit to actually accomplish this. Any ideas?
Thanks!
-deWerd
