[time-nuts] My Racal-Dana 1992

[Ed Palmer]

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
>