I'm not familiae with the 323 option but if the 323 has a "LOCK" use it and
it'll stop the flicker,,
If not read the manual!
hank wd5jfr

"Paul Erickson" wrote in message
...
I have an HP-8640b opt.323 signal generator which
seems to be working ok, except the final two digits
on the display keep fluctuating, even after 3 hours
warm up. Is this normal, or do I need to check out
the service manual.

Thanks in advance.

cheers, Paul - VA7NT email: