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
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