Electronics > Repair
CMU200 Rohde & Schwarz hangs during BaseDiscoverOptionsBegin
Ice-Tea:
--- Quote from: Bicurico on April 23, 2019, 04:08:51 pm ---I wonder how long it took to develop the CMU200, considering its complexity and engineering...
--- End quote ---
Think the better question is "how big was the team" ;-)
Bicurico:
Yes, of course. I meant "how long" in "man years"...
Still, it is impressive when you are messing inside a CMU200: so many modules, each with several boards, custom IC's, FPGA, software, etc.
Then all the PCB layout, circuit design, materials (silver plated modules, etc.).
I can't begin to imagine how much work, research, development went into such a device.
No wonder they were sold new at around 100.000 Euro (?).
Regards,
Vitor
Ice-Tea:
Pretty sure for 100k you got a base unit and not much else...
Bicurico:
Yesterday one of my CRTU units booted first fine. Then I switched it off but remembered I needed to measure something else, so I turned it on again. Unfortunately the serial number recognition during BaseDiscoveryOptions took much longer than usual and the dreaded error message appeared.
Strange, though, it said "error# 1095 overlay.c system error" instead of the usual "dsp.c" error.
I restarted and then the CRTU booted OK, but on successive boots, even after one night off, it now always produces this "overlay.c" error.
I don't have the time and nerve right now to start swapping HDD and DIGITAL board, though I am pretty sure this will be DIGITAL board related.
Any idea what this could be?
It disturbs me that these fine units are starting to fail due to the DIGITAL board and the small PCB's attached inside, which are basically impossible to repair.
Regards,
Vitor
Ice-Tea:
If you figure out which board crapped out, contact me. I can probably offer a spare.
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