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Advantest R3273 100Hz-26.5GHz Spectrum Analyzer repair

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chick0n:

--- Quote from: dschiedsch on August 26, 2016, 12:30:44 pm ---
There was a defect bias circuit for the first mixer which put DC voltage in the first stage and degraded the signal greatly.


--- End quote ---

I think i have the same problem. The DC is everywhere in the circuit. This cant be right.

Could you explain the repair a bit more?

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