Jeff, My 5370A manual calls for 9x9 & the rest XXX in the test you describe. My unit reads 10x9 for the same test. You might be in need of a full calibration, but beware of the peculiarities of the test equipment required & the need to verify all of it is in cal. It would be interesting to see what a few other folks read for the same test. Pete Rawson

Didier, thanks a lot for the manuals. I just tried some of the performance tests on my 5370A and I'm not getting what the manual says. Starting with the initial tests in Table 4-1, I'm good until Step 13. Instead of 100nS, I read 10nS all the way through Step 17. Pressing COMPLMNT shows -90nS. Steps 18 and 19 are ok. Step 20 shows 10nS again. I haven't done Steps 21-23 yet. I also performed the Accuracy test shown in the errata. I'm within .002Hz, so that is in spec. Can anyone suggest what I should do next? Thanks. > Service manuals (5370A and 5370B) are at > www,ko4bb.com/ham_radio/Manuals/ > > Didier KO4BB > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >