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phaselock lost error (pna e8364c)

Question asked by fcolleon on Aug 27, 2010
Latest reply on Aug 31, 2010 by odanzy
Hi. Recently, i'm having trouble with the "phaselock lost" message, when i try to make a typical 2 port calibration. This seems to happen when the port 2 is involved, and seeing the s-parameters, if seems to happen about 45 ghz.

The message doesn't clear, so the problem it's there consistently. In the last months, we have been making un-calibrated measurements, with the frequency set to 45 ghz(using point sweep with external trigger), but we don´t save any parameter when shutting down the vna.

Any solution or diagnosis? I hope it wouldn't be some hardware problem .