[time-nuts] My Racal-Dana 1992
Ed Palmer
ed_palmer at sasktel.net
Sun Dec 18 23:19:32 UTC 2011
Charles,
I don't know the answer to that question. Since it's a thermal issue,
it's a question of how long does it take for the temperature to
stabilize? 24 hrs. should be lots of time. I'd check it before going
to bed. A quick turn-on and measure won't raise the temperature much
and will quickly show if there's a change from normal. And, as
mentioned, it takes mine about 2 hrs. to stabilize after being turned
back on.
Ed
On 12/18/2011 4:35 PM, Charles P. Steinmetz wrote:
> Ed wrote:
>
>> Agreed. But it was annoying to leave it in standby mode and then
>> still have some drift. At first, I thought the drift was due to the
>> rest of the unit warming up. I was quite surprised when my tests
>> showed that the drift was 100% due to the oscillator. Using an FRK
>> as an external reference, I can turn on my 1992 (not from standby)
>> and immediately measure my Z3801A as 10.000 000 000 MHz.
>
> I put one of mine in standby earlier this afternoon. I'll turn it
> back on tomorrow afternoon and report the results. How long does
> yours have to be in standby before it comes on 40 counts off?
>
> Best regards,
>
> Charles
>
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