Anritsu sitemaster S331D

[1VOX]

I have a faulty S331D. It reports integrator failed at start and VNA integrator failed during self test. When measuring the return loss, I feel it works. You don't know where to look for the error.
Thank you

[vishaldotgupta]

your unit has faulty RF section.  most probably MMIC is cause of failure in such cases.  is your unit a single port or two port version.  I mean the two port unit comes with internal power meter option and has two N female test ports on the front panel