Products > Test Equipment
Possible serious bug in RTO1024 or RTO1000 series scope?
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egonotto:

--- Quote from: nctnico on July 06, 2022, 04:37:08 pm ---I don't think this is a bug but something is broken in your oscilloscope. I'm wondering what R&S has to say about this.

--- End quote ---

Hello,

what hardware part error has an effect like this?
An eeprom error, that cause a firmware error?

To set the probe attenuation manually is in my opinion a firmware only action.

Best regards
egonotto
   
nctnico:

--- Quote from: egonotto on July 07, 2022, 03:54:21 pm ---
--- Quote from: nctnico on July 06, 2022, 04:37:08 pm ---I don't think this is a bug but something is broken in your oscilloscope. I'm wondering what R&S has to say about this.

--- End quote ---

Hello,

what hardware part error has an effect like this?
An eeprom error, that cause a firmware error?

To set the probe attenuation manually is in my opinion a firmware only action.

--- End quote ---
In the end the amplification & offsets change in the hardware. It could be a recovery problem due to a broken amplifier (or other part) or an issue with a supply rail being bad causing a shift in the trigger level. Maybe even something simple like a bad connection somewhere causing a control line having the wrong value.
JohnG:
Looks like a hardware issue. My local rep happened to have the same model, and could not duplicate the problem, after which he shipped it to me, and I could not cause the same problem on the loaner.

Unfortunately, my scope is out of warranty and I have already had one out-of-warranty repair. My employer does not have the appetite for another repair on this scope. The local rep is lending me the scope in the meantime (thanks, Mike!) so I can complete at least some work.

One thing he speculated was that something was not getting switched during the autocal sequence, so that certain attenuation values were getting autocal'd incorrectly. I may try to open the scope and see if I can clean and reseat connectors between the acquisition board and the mainboard. That won't happen anytime soon, though. This possibility is in line with nctnico's suggestion:


--- Quote from: nctnico on July 07, 2022, 04:08:40 pm ---Maybe even something simple like a bad connection somewhere causing a control line having the wrong value.

--- End quote ---

John
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