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HP 8591E REF_CAL

Question asked by euchuma on Jan 25, 2012
Latest reply on Jan 26, 2012 by tabbott
Hi,

My HP 8591E spectrum analyzer show signal 20db below of real signal. I found problem in A9 board (3rd converter) IF 21.4 output. When I wire the REF_CAL in A9 (3r converter) to GND it show signal near of real.

Anybody know the output voltage in REF_CAL in A7 board (analog interface) when DAC gain amp is 130?

In my tests my REF_CAL in A7 (analog converter) with DAC gain of 130 is:

+8.4 V when A9 (3rd converter) is connect in slot

-6.8 V when A9 (3rd converter) is NOT connect in slot

Best regards  

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