Products > Test Equipment
8116A Code 42
Mick B:
Hello Mark, At the moment it would seem the Burst problem is healed, but it might be interesting to see how this would play out (Page 10.6-7) I was also hoping you might help me go through this, so I can get a working knowledge of my (HP 5005A Signature Multimeter) while verifying the work is done. My son bought me this piece of test gear, I have never used it, I have the manual and the basic bootup and functions all seem to be ok with no errors.
I believe the Error light is working as intended. leaving the intermittent BER light I am going to attempt to find what's up with that, it's off more than its on, and looking at U20 as on Pg. 10.6-7 with the Address decoder and my Rigol 16 channel Logic Probe on my scope would go a long way in my understanding of how to use this equipment and the confidence to use it in the future. I realize this is unnecessary, look at how far you got with a voltmeter! I really want the understanding you have, to be able to look at a circuit understand how it's supposed to work, like understanding ECL logic and knowing what the inputs should be and what to expect at the outputs and where to look if it's wrong.
You have been great at explaining things to me, very easy to understand and pointing me at the right literature to supplement that. Please note, your time is not wasted on me.
MarkL:
Great! Sounds like everything is working now.
The HP 5005A is many instruments in one, so I would recommend a thorough read through the user manual. I have a 5006A, which is just a signature anayzer.
If you want to try out the signature capabilities on your 5005A, there are very explicit step-by-step instructions on how to set up the 8116A for signature analysis, and then tables of expected probe results. All starting on page 10.7-17.
One useful thing to do is verify your ROM(s) on page 10.7-19. ROMs can go bad, which usually leads to outright failure, but it's still not a bad thing to verify them. There are several versions of firmware and you may have to look through the service manual change information to find the right signature table for your version. Each firmware version has it's own ROM part number and you'll need to cross reference the ROM part number(s) to the change information to find the right table.
And finally, if you want to learn more about signature analysis, there's a whole HP Journal dedicated to the topic:
http://hparchive.com/Journals/HPJ-1977-06.pdf
For more general learning, my favorite book is the Art of Electronics by Horowitz and Hill (two volumes):
https://www.amazon.com/Art-Electronics-Paul-Horowitz/dp/0521809266
https://www.amazon.com/Art-Electronics-x-Chapters/dp/1108499945
There's also a course book and a student manual, neither of which I've seen. I don't know how applicable they would be without a professor and appropriately equipped lab to go with them.
Mick B:
Well, wouldn't you know it my 5005A is having an issue with one of the pickups the Red Qual/Stop one. resister quick test shows open. don't think it's a big deal.
thanks for the links, I have the 2nd edition The Art of Electronics. and the service manual for the HP 5005A such as it is.
also, the first link you sent is all about a power supply, I read it all. And from there I was able to find lots of stuff about Signature Analysis Here is a good one. Application Notes 222-4
https://www.hpmemoryproject.org/an/pdf/an_222-4.pdf
Guidelines for Signature Analysis, Understanding the Signature Measurement
and this one is for all the Application Notes 222-xx
https://www.hpmemoryproject.org/ressources/resrc_an_03.htm
Thank you that website is a gold mine.
Thanks again for all your help, perhaps we can do it again in the future. :clap:
Mick.
MarkL:
Oops, wrong month. Here is the correct one:
http://hparchive.com/Journals/HPJ-1977-05.pdf
That's a good app note, thanks. Very detailed and practical. The HP Journal focuses more on the theory and design.
Best of luck, and hope you enjoy your working 8116A and learning the 5005A!
Mick B:
WOW, the 5005A is not your daddies VOM. Looking into open in the Qual/Stop lead doing the quick test. I changed the leads on the A6 timing pod when I first got this as there were no grabbers and messed up ends, then performed Q test and all was good, put it on a shelf until yesterday, then this happened. HP has a very convoluted was to test resistance in this thing. PS I downloaded the journal, I will read it.
On the outside chance, you might want to partake in the festivities IF I run into trouble, here is the service manual. Enjoy your weekend.
https://arcarc.xmission.com/Test%20Equipment/HP/HP%205005A.pdf
Just in case, I DL-ed this file no virous
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