| Products > Test Equipment |
| Agilent 54845A Failing all trigger self tests |
| (1/7) > >> |
| TRN:
A while back I bought a 54845A on an auction, and this scope had one bad channel, due to a faulty ADC-Hybrid. So I bought a used one, and installed it in the scope, and the bad channel is now O.K. However the scope fails all the Trigger self tests. I recovered the scope software to (V4.30) which appeared to have fixed the problem, but when I then upgraded to V4.50, the problem reappeared. So I did another recovery to V4.30, and this time it did not fix the issue. A subsequent upgrade to V4.50 did not change anything. Can Anybody give me any clues as what the problem is. I have attached a PDF which shows thState Trigger, Pattern Trigger, Logic Trigger and Trigger level errors Thanks |
| 0xfede:
Hello TRN, I don't know if this is your case (and I never had this scope) but I remember that there is a nice video from the Signal Path concerning the repair of a 54845A: Basically he find that poor contact between hybrids and the custom socket was causing intermittent faults. Hope that helps you. Best, 0xfede |
| Tony_G:
I think you have a software configuration problem - The 54845A shouldn't see those tests in the self test menu - You should only see "Knob and Key", "LED" & "Scope Self Tests" in that menu. Try completely reinstalling the initial image - Did you get it from my OneDrive? TonyG |
| TRN:
0xfede, Thanks for your input, and the link for the video, and i have already seen this one, and have cleaned the hybrid contacts. This did however not solve the issue. |
| TRN:
Tony_G, Thanks for your input, and if I do not mark the service extension box, I get the standard test menu which you mentioned. However when I do mark the box, I can test all the subsystems separately. I have attached a screenshot of the successful standard self test after the first recovery of the v4.30 software. I downloaded the v4.30 recovery and v4.50 upgrade software from the Keysight ftp, so I assume it should be O.K. Nevertheless I will download your version, from your onedrive, and will do a complete reinstall. I will let you know how it goes. Regards |
| Navigation |
| Message Index |
| Next page |