Ver. 3127 FW for HP 5372A Frequency & Time Interval Analyzer - Page 1
Forum section: electronics / testgear

author: garrettm
author_rank: Frequent Contributor
timestamp: February 10, 2025, 01:51:29 am
content: I was wondering if anyone has an HP 5372A with firmware version 3127 or newer, and, if so, would be willing to read their ROMs and upload them to the forum? If not, would it be worth asking on time-nuts@groups.io?I have an older 5372A that I would like to update so I can use the Jitter Analysis feature that is only available with the above FW version (or newer).

author: Pete111
author_rank: Contributor
timestamp: February 16, 2025, 05:03:41 am
content: I have a set of ROMs from the CPU PCB (05372-60024) that I have copied which I have noted have the FFT option, but I am not sure how I came to that conclusion. The instrument was disassembled to refurbish, and I have still not got around to reassembling (other projects and all!). Therefore, I can't confirm whether they are the 3127 FW version.I am happy to try and post the copies if you want to give them a go. It will still be some time before I will get around to reassembling my instrument.Regards,Peter

author: trukresom
author_rank: Contributor
timestamp: February 16, 2025, 09:06:41 am
content: Two years ago I copied the EPROM contens of my HP5372A into files.My machine is equipped with the FFT option and the option 020 (FastPort).I don't know if the option 020 has an impact on the EPROM content.You can find the files in the attached zip-file together with my notes.Regards,Kurt

author: garrettm
author_rank: Frequent Contributor
timestamp: February 16, 2025, 10:51:44 pm
content: Thank you Kurt! I really appreciate you uploading the ROMs.I believe the FastPort option is set by one or two dip switches and shouldn't have a dependency on firmware version--at least that was my take from reading the service manual.Now I just need to order a new backup battery and disassemble this beast so I can fix error 160 and hopefully get the FFT option at the same time. I figure if I'm going to pull it apart, I might as well try and get everything done at the same time.@Peter, I would be interested in seeing your ROMs if you are still willing to upload them.Thanks again,GarrettHere's a link to my original forum post about my 5372A:https://www.eevblog.com/forum/testgear/hp-5372a-freq-time-interval-analyzer-option-040-fft-jitter-analysis/msg5810719

author: Pete111
author_rank: Contributor
timestamp: February 18, 2025, 03:30:27 am
content: Hi Garrett,I am happy to upload the images if required but is there any point if they prove to be the same FW as provided by Kurt (I have not had a chance to compare them as yet and probably won't be able to do so for at least a week)?Regards,Peter

author: garrettm
author_rank: Frequent Contributor
timestamp: February 18, 2025, 05:57:46 am
content: Peter,I still think it would be interesting to compare the two ROM sets. I believe the firmware version is a string (as it is shown in the "System" menu at the bottom of the display), so I was planning on doing a string search of the ROMs to see if your set happened to be a different version. And if so, it wouldn't be a bad idea to archive both in case anyone needed a different version for some reason.

author: Pete111
author_rank: Contributor
timestamp: February 24, 2025, 03:59:04 am
content: Hi Garrett,FW files attached,Regards,Peter

author: trukresom
author_rank: Contributor
timestamp: February 24, 2025, 08:42:20 am
content: Hi Garrett, hi Pete111,We can already see that the low word of the checksums (part of the filenames from Pete111) are identicalto the 16-bit checksums displayed by the Lloyd EPROM-Programmer.The probability, that the 2 ROM sets are identical is thus very, very high.Regards,Kurt

author: garrettm
author_rank: Frequent Contributor
timestamp: February 25, 2025, 02:40:45 am
content: Indeed, after a quick diff of both ROM sets, it appears they are identical. But we couldn't know until they were both uploaded for comparison.Thanks Peter, I appreciate you taking the time to upload your ROMs, even if they turned out to be the same version as Kurt's.I should have some free time here soon to pull my 5372A apart, back up the old ROMs before erasing them and programing them with the new firmware that has been kindly uploaded here.Thanks again,Garrett