Products > Test Equipment
Agilent 600MHz 54831B hack for 1GHz 54832B possible? YES!
Howardlong:
--- Quote from: Jwalling on August 18, 2016, 07:30:10 pm ---
--- Quote from: Howardlong on August 18, 2016, 07:21:19 pm ---Family can wait ;-)
Needless to say, scope is now a 54832D, rise time is about 320ps on real time sin(x)/x, and a smidge under 300ps on equivalent time.
Bandwidth is 1230MHz on real time, 1310MHz equivalent time.
--- End quote ---
Nice. :-+
It looks like we both just posted at about the same time. What are the odds?
So, your board has 128MB of ram. What is the memory option (if any) on yours?
Edit: And did the 831B/D only go to 500ps/div. before the mod?
Jay
--- End quote ---
The option I have is MEMORY_64M.
Yes, 500ps is the fastest timebase as a 54831.
Is your trigger jittery at fast rise times in realtime? And for fast sine waves, is the trigger point offset?
Jwalling:
--- Quote from: Howardlong on August 18, 2016, 09:35:55 pm ---
The option I have is MEMORY_64M.
Yes, 500ps is the fastest timebase as a 54831.
Is your trigger jittery at fast rise times in realtime? And for fast sine waves, is the trigger point offset?
--- End quote ---
At 1GHz with a 600mV RMS sine wave, the scope will trigger fine without jitter from about +546mV to -434mV. On the second question, I didn't see any problem like that, unless you mean what I just wrote. Maybe running the calibration routine will correct?
The legitimate 54832B behaves the same way, though.
There's an interesting thread about triggering on a sine wave on the Keysight forum about this: https://community.keysight.com/thread/23229
Regarding the PM question about how I figured it out, I had a legitimate 54832B that I documented a repair thread about. Comparing the two ACQ boards side by side made it easy. :)
Jay
Mrt12:
Awesome! it worked, I have a 54832B now :-)
Noody:
Can you see it? ;D
http://www.ebay.com/itm/Agilent-HP-Infinium-54832B-1Ghz-4GS-s-4ch-Digital-Oscilloscope-/281890103837
tonykara:
I just stumbled onto this in 2019, and I'm so glad because it worked on my 54831!
Jay, I initially looked at your two photos here, and it looks like you took one resistor off in the dual row area, but also installed one in the single row below it. I tried that initially and windows crashed sometime after launching. Then I took off the resistor I added, (so the overall mod was just removing the 1 resistor in the dual row area), and it now comes up as a 54832! So cool!!!! Thanks. Now I need to figure out the changes needed to open up the memory. (I think that sorta documented here somewhere)
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