Looking for ROM images for HP 53181A counter

[TERRA Operative]

I'm currently repairing a HP 53181A counter and am looking for later version ROM's
I have version 3073 but I know that at least version 4243 was available.

If anyone has one of these counters and a chip programmer, and has a later firmware than 3073, I'd greatly appreciate a dump of your chips.
They are socketed so it's easy to do and it won't affect calibration etc.



Thanks!

[C-47]

I have version 3418 but how to download it is the question, hopefully someone will appear with a later version. Alan.

[TERRA Operative]

When I upgraded the firmware in my 53132A I just used my TL866II programmer with an adapter, but one would need a programmer.

[picburner]

Not found v4243 but v3944 only

[TERRA Operative]

Great, thanks. That's at least a step up from mine.

If anyone has a later revision, gimme!

[gamalot]

The firmware version of my 53181A is 4243.

[TERRA Operative]

Fantastic! Thank you so much for the ROM's!   

[jonese]

My 53181A came with firmware 3418.  Is it okay to jump directly to 4243?  Do I need to concern myself with dumping the calibration data before hand at all?  Not that I could right now anyway, as I don't have a HP-IB interface.

[TERRA Operative]

You will need to recalibrate, but it doesn't need GPIB to do so. It can all be done from the front panel and is pretty easy to do.

You'll need a 10MHz reference, a DC PSU good for exactly 5.000V, a decent DMM (good to microvolt accuracy is needed apparently, but a 4.5digit DMM or greater is probably fine), and various interconnect adapters.


https://www.keysight.com/us/en/assets/9018-01065/service-manuals/9018-01065.pdf

Page 1-4 for equipment required (Ignore the Pulse gen and Time Interval Calibrator requirement for the 53181A).
Page 2-25 for the actual cal procedure.

[jonese]

It's an easy calibration for the 181, Thank you