Electronics > Metrology
Keysight MSOS104A Repair Attempt
Extrasolar:
Hey,
Wow, mystery part no more :) , I have ordered a few HMC720s !!
I've received an ultra high bandwidth scope last week and will absolutely probe everything possible on that motherboard :D
So, on a systematic approach:
1. Check Oven and signal path up to the synth.
2. Check VCO
3. Check Synth and Buffer
4. if signal (+/-) is present at Buffers output (both outputs) then:
Check SPI comms.
5. Check FPGA/ASIC :(
Last week the same story repeated, one other MSOS804 broken with the same problem, and also a few weeks ago another MSOS404 same problem.
I wonder if Keysight uploads some artificial errors (functions) with updates on such scopes ??? :-BROKE
BeamDump:
Hi
Was thinking the same, that a flag went high somewhere during an intermittent event or maybe with an update. Can't speak about Keysight but one known offset printing quality control system was caught doing so.
So far swapped the n-synth and dual buffers, same thing. External ref also didn't show anything unfortunately.
What's the date on yours and what soft revision are they running?
HighVoltage:
--- Quote from: Extrasolar link=topic=333397.msg4575013#msg4575013 ---
Last week the same story repeated, one other MSOS804 broken with the same problem, and also a few weeks ago another MSOS404 same problem.
I wonder if Keysight uploads some artificial errors (functions) with updates on such scopes ??? :-BROKE
--- End quote ---
Too many problems with these S-Series scopes.
I always wanted one, maybe that is not such a good idea anymore.
Thanks for all the great info in this thread.
Extrasolar:
Hi,
I dont recall the version and to get it I would have to reassemble the whole thing.
HMC720 chips on the way (the percs of being ADI employee :) ).
BeamDump:
--- Quote from: Extrasolar on December 12, 2022, 03:33:40 pm ---Hi,
I dont recall the version and to get it I would have to reassemble the whole thing.
HMC720 chips on the way (the percs of being ADI employee :) ).
--- End quote ---
Some perk there ;)
I ordered 2 my self. Price is really something on these. Then again, not your run of the mill part.
With that, would like to advice to stay away from the Chinese. Good thing i ordered two sets of NC7WZ17P6, one from their bay, other from sets of evaluation boards. Wondered why theirs didn't work. Just a case with pins sticking out and nothing inside. :palm: After i bought the 1st 5 pcs for 3EUR, price jumped to 42EUR. :-DD
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