[time-nuts] OCXO Adjustment Question -- Oven Cycling

Bob Camp lists at rtty.us
Wed May 8 16:50:16 EDT 2013


If it's moving up and down from +1 to +17 Hz from 10 MHz relative to 10 MHz,
it's broke. Either the OCXO it's self is in trouble or the supply going into
it has an issue.


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Frederick Bray
Sent: Wednesday, May 08, 2013 2:00 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] OCXO Adjustment Question -- Oven Cycling

One of the things I hadn't adequately considered was how quickly / much 
the oven cycling affects things.  I wasn't really thinking about this 
when tweaking the adjustment so I wasn't doing them at a consistent 
point in the cycle.

Now, it looks like it may be cycling from a low of 10.000001 to a high 
of 10.000017.  I have watched this pattern repeat a number of times now.

I guess my goal for this device should be to get it to the point that it 
cycles from about 9.999992 to about 10.000008, thus putting the center 
point around 10 MHz.

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