开云体育

I have seen this failure a few times where it was not the RX module as well. It's been awhile but IIRC it actually may have been an issue on the generate output level and may have been a blown port on

Hi Rick Thanks for pointing me into that direction. Will check Q512 on the RX modules 08920-61102 that I have. I am a little bit confused though since the failing RX modules in the "non-working unit"

Regarding HP 8920A problems where the diagnostics report "Squelch Fixed High Level and Squelch Open High Level" fail, this was because of a failure of Q512 in the receiver module. This failure mainly

Alright, I have now received 2 other receiver modules (08920-61102) and when I use them in my first and working unit they both pass all tests including the dreaded receiver and spectrum analyzer

Hi Rick, Note that it is the MAR- *7* SM that is the correct replacement, not the MAR2SM. https://www.minicircuits.com/pdfs/MAR-7SM+.pdf

Thank you!

Hi Alessio, ? Thank YOU for the information on the MAR-2SM+ being a replacement for the MSA0786 used in the 8920 / 8924 input module counter circuit. We have a stock of the "0786" but should be using

Sorry for the multiple edits. Updated my post with attachments instead of inline pictures. (I had to delete my previous post in order to be able to remove the inline pictures and instead

CF, This is for the benefit of other members, too with good quality pics.? The way you've included them, as inline images, basically semi-ruins them!? The added fuzzy and blurry quality is

Following... Ohm out Pot-to-Board Pot Cleaner and 'Wiper' 1-3min. to clean em off. Re-Run Diag. 'You know my methods, Watson' 73 DE MATT

I shoulda say MAR 7SM+ instead of MAR 2SM+

When its disconnected from the unit, the green light is on (also on when connected to unit) and i have 15v on the white wire, I wish i knew howto turn the PS on when out of the unit before i removed a

Hi Rick, Thank you so much again, I have check the mmic one of them U5 have some strange voltage, like 6 volts on output and 2.5 volt on the imput, MSA0786 as you know is obsolete, in a big italian

Thanks Robert, Yes, you are correct, i got a few minutes to myself earlier today and removed it from the housing and did some probing.? I definitely have a short on the 3.3v rail on J11. All the

Dear Alessio, That looks like you have a bad mmic amp on the control board inside your input module. These amps supply RF to the counter. Check U4, 5 and 6. These are MSA0786 amps. Likely one is bad.

A ticking switch mode power supply almost certainly has a short circuit on the output. This could be on the power supply itself or elsewhere in the instrument. What does it do if you unplug the

Recap all.

8924C PSU Took the PS out of the chassis and it looks like the 47uf cap was already replaced in my PSU unit, the green light is on, but when the power button is pressed, the supply makes a clicking

Gents, A quick update. I am in the process of building a DB9 male to female ribbon cable and trying to find my riser cards that I bought a few years ago in order to be able to do the measurements

Hi guys !! Suddenly I have this problem on the test set, what could it be? I'm not going to spend a lot of money on it, can it be used with sufficient accuracy, or is it very seriously ill? Greetings