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Re: HP Agilent 8753ES VNA repair [Help]


 

On TP20 I have a RF signal is at 39.280 MHz, -1.3 dBm ?for frequency <16 MHz instead of 39,996 MHz ?--> Delta is 716 KHz
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On TP14 for a 10MHz setting on the VNA I have a 2sd LO frequency at 10.720 MHz instead of 10 MHz --> same delta?
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From what I understand The 2sd LO in low and high band is not correct because my VCO is not at the correct frequency.?
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Now we need to understand why :)?

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