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How repair damage from DC input to HP 8590?

Question asked by dawsonk on Jul 17, 2011
Latest reply on Mar 15, 2012 by sm7ovk
I connected an RF source with 9V dc bias to the input of my HP 8590A spectrum analyzer and can no longer see any signals. I'll test the input attenuator and then the first mixer to see which one I damaged, but I can't afford to replace an entire assembly and would sure appreciate advice from anyone who has been here before me! I used a full year's hobby budget to get this unit so I could investigate RF modulation techniques. I'm kicking myself for such a careless mistake. Thanks for any help.
-Dawson Kesling, Sacramento CA  

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