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8590A Spectrum Analyzer

Hi folks

I have got an old 8590A Spectrum Analyzer from my company, unfurtunately with a defect. The amplitude levels shown on the screen is app. 10 dB below the actual applied input level, so the attenuator or input circuit apparently has a defect.

Does any one have a service manual, diagrams etc. of this model ?

Thanks in advance

Kim Würtz

Reply to
Kim Würtz
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It is probably a damaged mixer module. We had several fail in our

8590As over several years of heavy use. There is a maximum power level marked by the input connector, and if you exceed it, you can damage, or completely destroy the mixer. 
--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

Hi Michael

Thanks for your quick response. Do you have any further information on the mixer (schematics and/or type), so I am able to replace it myself.

Best regards Kim Würtz

Reply to
Kim Würtz 

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
Reply to
Michael A. Terrell

Reply to
Kim Würtz

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