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
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
Sorry, I do not know the circuit level voltages for this older product.
I am hoping someone from our Forum community can jump in and help you.
Regards -