OK soyou can do the tests with the detector and a scope.
Drive the scope X with the SWEEP OUT from front panel and the Y from the detector.
PRESET,START=2G, STOP=20G, METER - sweep should be continuous with lots of "wiggles"
Note the lowest point on the sweep, and set the leveled output for 2 dB (or so) less than that and run the 2-20Gig sweep - should be a relatively straight line with some slope (due to cable) at the 20G end
You can also run the ALC test - PRSET,CW,SHIFT METER - use RPG to vary output which should vary smoothly from max to min (maybe -10 dBm). I'm going to guess that this test fails - remember that you need to turn RPG CCW several turns B4 it has any effect. Once it starts to have an effect, output should vary smoothly. If not, there is an ALC problem
Cheers!
Bruce
Quoting RubenRubio <rubenrb2019@...>:
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Hi again
Thanks for those steps Bruce, but currently I don't have an SA, I sold my 1.8 gig last month and planned to buy an 8566B asap. For now I only have a 5342A microwave counter, power sensor 8481A along with 436A meter and 8472B crystal detector.
The cal data paper matches series number of the machine and model too. But I think is weird because the high band detector, the coupler and the step attenuator has APC 3.5 connectors and 26.5 gig stickers :S
I want to measure the power supply ripple in all rails... I saw a table with max current for each rail, but not the maximum allowed ripple. Anyway I want to check that before do more things. This evening?I've been taking down the front panel to check the smashed area for damage and it seems, except for the output connector and frontal frame,? ok.
Tomorrow I'll check the CW behavior with METER or CRYSTAL modes, because I have a 2 gig power splitter, maybe it helps for troubleshooting. Also, I have to study block diagrams of the RF section, but for now I think that the ALC is the culprit... the two detectors are fine, because the fail happens in band 0 and the other bands too.
I'll keep you in touch, thanks for all :)
Regards,
R.
