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8644B cal and self test errors after installing STD Doubler

Question asked by MarkBielman on Apr 15, 2019
Latest reply on Apr 19, 2019 by MarkBielman

Hello group. I have a non-optioned 8644B (1030 MHz) and found a doubler kit to 2060 MHz. After installing, the unit fails calibration and self test with error 6,040,117. Manual says attenuator issue (designated by the 6,040 result). Not exactly sure

what this indicates as I know the output attenuators are OK (and not even tested, really).

 

The output seems OK up to 2060 MHz, although perhaps a bit low. (by 1 or 2 dBm)

 

Is the doubler defective? Are there any adjustments or hints to find a hardware failure?

 

Thanks!

 

Mark B

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