ok..... the story continues……
after rollback the hybrids and went back to the working config. it was again in the ch1 with result…. vertical fail… trigger pass. (like in the post above)
lets start from here:selftest fails with both hybrids placed on ch 1 same error.....i know from one hybrid it is really failing but the last one were the trigger shows passed i would say the hybrid was the ch 4 hybrid..
i managed to test the hybrid on a different channel and 2 times passed… So the mule still has a channel one issue.
this looks like i still having an error in the channel 1 circuit.
i will come back on this one after the deep dive into channel 1.
when i calibrate in the end when you look at details your are pointed to the error section. if you turn it arround if all channels fail on both vertical en trigger. you will see nearly all section from the repair diagram shown in details.
that will point you to the solution one way or another...
i also did a deeper dive into the hidden options of the scope and went in with the commandlines :
just create 2 batch files with a command from below in the c:\scope\bin directory
For scopes that use the hp5484X.exe executable:
hp5484X.exe scope /scope /hpib /service (for service mode) i did not see anything yet apart from ATT SET in the selftest menu for resetting the contacts.
hp5484X.exe scope /scope /hpib /internal (for some very interesting stuff) for this option it gives you an extra option at the bottom of the CALIBRATION /SELFTEST dropdown menu. where you can choose different options.
ok what can this error all mean: in the selftest with service extension checked.
--------------------------------------------
Self Test invoked executed
Error in self test invoked cal - DLL cal.
Error in self test invoked cal - Clk 100Mhz cal.
Error in self test invoked cal - Data Acq cal.
Error in self test invoked cal - Fiso Redundancy cal.
FISO test failed on channel 1
FISO data bit error not correctable.
Test FISO FAILED.---------------------------------------------
It is all pointing to a sort of cal. or pre-cal state which is not in place, knowing the hybrid used on CH1 is working 100% . The attentuators swapped also doesn t make any difference..
-> it has to be with CH1.
clicking on details after calibration it only says: "FISO REDUND" for the rest nothing.
does anybody know what i could diagnose extra by connecting the scope to my laptop with GPIB/HPIB.
new update i think the last time the FISO was not really seated ok. because channel 1 is working after i swapped ch4 <-> ch1 ch4 has the failed error. really strange. because i saw it working…..
but one way or an other the FISO needs to be replaced it think. so i am looking for a second FISO.. for this real mule.
just a tip before putting the connection pipe between the attentuators and the FISO. be aware to fit and tighten the FISO first completely with out the cooler then put the connection in between en tighten the screws and at last place the cooler on the FISO. that way the contact are 100% ok to the FISO and not a bit lifted.