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8720/22 Raw Sampler Offset Correction

Question asked by dhamilton on Oct 12, 2011
Latest reply on Oct 12, 2011 by Dr_joel
I have several 8720D/ 22D Network analyzers with the display in S11 or S22 not positioned correctly on the display.   On the 20's it should be center screen and 22's 10dB below center screen.  The R channels are off by over 10 dB  of what the manual says it should be (primarily higher).   Normally on the E/ES models or D models with new CPU you can correct problem with Sampler Raw Channel offset corrections.  On the D models with F/W 6.14 and below the manual does not provide the procedure to correct this problem nor are there any service notes.   It should be a few simple peek and poke corrections just like the newer units.  Because of this failure the unit has intermittent preset failures and test 0 failures.   Dr. Joel could you please provide the alignment information to correct this problem?   Thanks.  Dave