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When measuring the output waveform by using the AT-810/00-00017A HV coaxial attenuator, the peak amplitude (envelope of the waveform) is unstable. Additionally, pulse timing (repetition rate) is sometimes random irrespective of the setting on INS trigger modes (PHASE or VARIABLE). Is there a failure on any part of the INS?

NoiseKen

The symptom you referred to is one of the typical ones where the internal mercury-wetted relay got deteriorated.  Replace the relay with a new one.  Please contact us for more information.

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