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agilent 8720ES Net analyser- message 'Phase Lock Cal Failed'

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f_yones

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Phase Lock Cal Failed

Hi, I have a agilent 8720ES Net analyser
When unit is powered up the message below is displayed:

"Caution: Phase Lock Cal Failed"
I did all related test (43 and 48) and SAMPLER VOLTAGE TEST by using manual and saw every thing is ok,
but my problem has remained.
also I upgreded firmware but no thing happend.
Any one can help me please.
 

Re: Phase Lock Cal Failed

I solved my problem.
problem was in cable connection betwen in and out SMA connectors in front pannel.
 

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