[time-nuts] NTGS50AA glitches

Bob Camp lists at rtty.us
Tue Jun 12 20:32:18 EDT 2012


Hi

You are going to get a 5x10^-10 to 2x10^-9 per G frequency shift on most of these oscillator. For anything below 5x10^-10 a pretty exotic crystal would be needed...

Bob

On Jun 12, 2012, at 7:19 PM, Dan Rae wrote:

> On 6/12/2012 2:48 PM, Mark Sims wrote:
>> I saw a similar DAC jump when I replaced the SMB pigtail to my board.   The unit went into a brief holdover and came out with a shift in the dac vaue.   I would try wiggling the coax connection (without moving the board) and also gently tapping around the board (maybe start with the oscillator can) with a screwdriver handle to see if anything causes an upset.
>> 
>>  		 	   		
>> 
> 
> Interesting.  I just picked it up gently and rotated it through 90 degrees.  This has produced another 1.5 mV DAC step and corresponding temporary jumps in the PPs and Temp traces.
> 
> I seem to recall much bigger effects than this when adjusting ovens like the 10811 which I always would try to adjust in the orientation that they were to be finally used in, so I really shouldn't be surprised.
> 
> Dan
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.





More information about the time-nuts mailing list