Agilent/HP 8664A - Page 1
Forum section: electronics / testgear

author: tchiwam
author_rank: Regular Contributor
timestamp: January 02, 2021, 09:55:51 pm
content: Hello,for those who are having an error 5030,xxx I rewrote the code in python, the code is from the Service manual. I will post it after a clean up to git something.If anyone is having this document somewhere, it would help 08645-90024. I am dumping all the mux Voltages too, and right now some of the DIAG GPIB code is a bit unknown...I managed to get the great +0 result after special function 320 !!! Happy camper. 8664A Option 004 008, soon to be 8665B when I get the romsHappy new year.

author: rickells
author_rank: Regular Contributor
timestamp: January 07, 2021, 05:03:24 am
content: hi,Did you post the Python code & procedures for your HP 8664a ?If so, can you post the web link for download ?I would like to try to use them for the HP 8665b 6GHz Signal Generator.I recently purchased a HP8665b with ROM version 4.2.2I am not familiar with it, yet.It has some issues, and I am trying to determine what is wrong with it.1) The Right-side VFD display does not light up, so I can't set nor read Amplitude values.2) as a result of the bad display, I can't tell if there is an Rf O/P or not.3) After power On, a self-calibration starts up on the Left-hand display.After several long minutes the display states: "Result 8,043,311" andthen displays: "hardware failure" .after a few moments displays "1.5 GHz".I can change the frequency, using the front panel controls.I have gotten the cover off ( single piece steel case; ~ 30 Torx screws ).that is as far as I have gotten today.4) I will be measuring PS voltage values soon.I just found a .pdf service manual online tonight with some PS circuit diagrams, mechanical& some diagnostic, but no Assembly (module) circuit diagrams.For HPhttps://literature.cdn.keysight.com/litweb/pdf/08645-90145.pdf?id=88786I don't see any reference to a battery inside the instrument.Is there one ?I'd appreciate any insight you have if we can discuss as I go along ?Do you have any schematics as .pdf's that you can share ??thank you,r

author: tchiwam
author_rank: Regular Contributor
timestamp: January 07, 2021, 03:57:18 pm
content: Hello,8,043,xxx without a plus or minus can be a blessing or a pain.Before opening the case:- Let it warm up 30minutes- Check if you have a 10MHz behind the unit, if you do it may just be a recal- Run the MW Loop adjustment and check the values (without playing with the pots)- Try the 171, might not work without the dip switch setOpen the case- Flip the switch 1 , closest to the back of the 4, to allow you to run the IDL- Lift the A14 15 16 slot cover- Measure the power supply at the I/O board, back right partly hidden under the 40 pin flat ribbon, I bet those are OK since you got the 8,043,xxx- MW Loop adjustment, do it again- HF Drvr adjustment- Check all of the smb sma connectors for loose ones- 171 recal Go back to MW Loop a couple of times- Clear all messages- Clear all memorySpecial 320 and take all failures one module at the timeI have a Check module in my repo, at the end of the service manual you should have most of the values for each MUX, check agains't them if you still have a fail somewhere, post it here and let's sort it out. Not all modules are there but I can make / add modules if you find failures elsewhere.Get the +0, close it all up, re test and it should be good. Redo all tests and check the MW Loop valuesThe only thing missing for my 8665A to be a 8665B to work is a set of ROM... Looking for a "cheap" unit on ebay...This is my repo of GPIB bits , you may need gpibeth.py in your path to import ithttps://github.com/tchiwam/GPIB

author: tchiwam
author_rank: Regular Contributor
timestamp: January 07, 2021, 04:09:16 pm
content: One of the document that would help a lot is 08645-90024 I think it would help a lot the 86xxx series signal generator owners...

author: rickells
author_rank: Regular Contributor
timestamp: January 07, 2021, 05:15:03 pm
content: hi tchiwam,I tried the URL that you provided:https://github.com/tchiwam/GPIBI also tried:https://github.com/tchiwam/gpibeth.py/GPIB&https://github.com/tchiwam/GPIB/gpibeth.pybut all failed to locate your web site !!- I do not understand what you meant by:" This is my repo of GPIB bits , you may need This is my repo of GPIB bits , you may need gpibeth.py in your path to import ithttps://github.com/tchiwam/GPIBin your path to import it " ??Can you provide the correct path so that I can get the Python GPIB code ?thank you,

author: rickells
author_rank: Regular Contributor
timestamp: January 07, 2021, 05:17:06 pm
content: Ah !Found it !https://github.com/tchiwam?tab=repositoriesthanks !

author: rickells
author_rank: Regular Contributor
timestamp: January 07, 2021, 05:49:14 pm
content: Can't find the 90024 MAN.sigh.From the Keysight website, can get:Operation and Calibration Manual HP Part 08645-90023.I see other, non obtainable manuals:Service Diagnostics Manual HP Part 08645-90104Microfiche Operation and Calibration Manual HP Part 08645-90026Microfiche Service Diagnostics Manual HP Part 08645-90028Let me know if you get .pdf'sthank you