Author Topic: Tek TDS 744A/784A FWs: nvLibrariansDiag, Libs with crcc failures: , ExtConst  (Read 3608 times)

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Offline mssbidTopic starter

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Quick update: I managed to get my Gpib setup working enough to clear the error logs, and indeed, the nvLibrarians errors are gone.

Cool. Any chance to drop me a dump of the two EEPROMs? Thanks!
 

Offline hvontres

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Quick update: I managed to get my Gpib setup working enough to clear the error logs, and indeed, the nvLibrarians errors are gone.

Cool. Any chance to drop me a dump of the two EEPROMs? Thanks!

Sorry, the tek is currently stuck behind some other projects. I am currently fixing up my old HP 8542B which should allow me to finish up the HF cal. Had a bit of an oops with the power supply caps. Took them out to test them and then mixed up the -5V and 50V caps.... 35V cap + 65V DC == lots of smoke and black goo. Also finally did the full set of adjustments on an HP 3314a. I'll post the dumps as soon as I get my GPIB setup sorted.
Henry von Tresckow
I am not an EE, but I play one in the Garage
 

Offline Tantratron

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Quick update: I managed to get my Gpib setup working enough to clear the error logs, and indeed, the nvLibrarians errors are gone.

Cool. Any chance to drop me a dump of the two EEPROMs? Thanks!
It might not be a good idea at all for you to write another TDSxxxA oscilloscope EEPROM's content. The content of both these two EEPROM contains the very fine calibration value of your Acquisition board.

There are some techniques to eventually recover the content of your old EEPROMs content which would be then written in the new sets of EEPROM. Otherwise you have no choice to run a complete calibration of your Oscope in order have dedicated and valid content, again highly related to your specific A10 acquisition board.

If there is something you do not want to have wrong with precise TDS Oscope is the integrity of these two EEPROMs
 

Offline mssbidTopic starter

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There are some techniques to eventually recover the content of your old EEPROMs content
Yep, but this thread is about something different...
 

Offline mssbidTopic starter

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I'll post the dumps as soon as I get my GPIB setup sorted.

OK, take your time (and good luck with your caps ;-))
 

Offline Tantratron

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I do not have any TDS7x4A so cannot extract any image or do any test. However I've asked a friend of mine in Spain to try on his TDS744A running with version 1.1e to upgrade 4.2.1e version.

He got the same problem, the reported error ERRORID: 153 diagnostic test failure extended cal librarian reset which can only be solved by re-calibration or understanding the data structure inside both U1052/U1055 chips.

This poses the fundamental question of how is structured acquisition EEPROM (total of 512 bytes). We know for sure the first 8 bytes are always 0x00 and there are always at least 4 bytes to indicate end of file or end of calibration constants storage.

 


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