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HP 8590A Freq and Ampl Cal Information

Question asked by larrbeard001 on Dec 6, 2013
Latest reply on Dec 21, 2013 by larrbeard001

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I know the HP 8590A is one of the most basic of the HP analyzers, but there are still mysteries beyond what is in the power supply.

In what documentation is there information about just what is going on as the instrument performs its frequency and amplitude calibrations?

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dhamilton Dec 12, 2013 7:41 PM
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You can purchase a service manual from several used book sellers. This manual will describe what the self alignment is doing.

Do you have a specific problem with your analyzer?

Dave
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- larrbeard001 @ dhamilton on Dec 21, 2013 6:24 AM
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  Dave:
  
  Thanks for the reply.
  
  I have what I believe is the whole set of HP documentation on the '8590A and descriptions of what is going on in the dozens (!) of self-test/CAL routines and sub-routines just isn't there.
  
  I do have a specific problem. The unit is my "school" unit - the parts junker I bought and that over a several year period gets to be the guinea pig for fixes and experiments. It has improved to the point that it passes all but the last few steps of CAL AMPL. I can see that there is going to be an issue when the cal signal on the screen goes well off the screen upscale. Then, sure enough - FAIL.
  
  I don't have the unit on the bench just now (and the bench is about three projects deep), but I suspect that the failure is in some of the narrower bandwidth tests. I've swapped analog modules from a known good analyzer and the same failures persist - making me suspicious of failures in A/D or digital pot settings.
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HP 8590A Freq and Ampl Cal Information

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