Hi Definitely time to scrap the counter. To save you the excessive landfill charge I'll take care of the disposal for you.
Unfortunately for my future disposal business, the answer to your question is indeed, yes you can likely fix it yourself. The answer to the other question is also yes, this is pretty typical of a 620 after auto cal. There are a bunch of things in the archives about which registers to do what to in order to make the SR620 "run right". Some of them are fairly tedious back and forth tweaks. As I recall there are at least two approaches to taking care of the problem, depending on how far you want to go. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, February 23, 2011 5:41 PM To: [email protected] Subject: [time-nuts] SR-620 cal Hi guys, need some help with a cal on my SR-620 counter. In frequency measurement mode the unit always has an offset of up to +/-2E-010 after auto-cal when feeding the same 10MHz to the (A) input and to the external reference. It should not have any offset of course. Stanford says "the accuracy spec is +/-3.5E-010, so your unit is within spec". Sigh. that's a crappy spec I should say.. Is this normal? On the Agilent counters I get 0.0 perfectly when averaged when doing that test with the carrier subtracted, no matter what gate time I use. Any help would be great, as I have to decide if I pay Stanford to do the cal, and they won't guarantee that the unit will perform any better whatsoever after spending $500 for the calibration.. Thanks, Said _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
