[time-nuts] OCXO phase pops

[Bob Camp]

Hi

The problem with phase pops inside a control loop is that they can come from a lot of places. As
long as the loop is still closed they generally track out. That’s not saying the OCXO is *not* the source,
only that there are other culprits to dig into. 

Classic phase pops in an OCXO tend to be wide spaced in time. Since they are also randomly spaced,
that’s not any help with two pops. Sorry about that. 

Bob


> On May 8, 2016, at 8:43 PM, Bob Stewart <bob at evoria.net> wrote:
> 
> I started getting phase pops in my testing recently, and I'm pretty sure they're from the PRS-45A Cs standard.  Is this likely to go away after it cooks some more, or do I need to start looking for a new OCXO?  It's been running since January, and has an MTI marked model number 250-0827.  The only thing I has as a potential replacement is the 260-0624-C in a spare KS-24361.  I have no idea whether they are even close in quality or power/EFC needs.  Oh, and when one of these pops happens (usually between 1 and 2ns) the output tracks back to where it was, so it doesn't seem like it's a problem with the other parts of the PRS.
> 
> Bob - AE6RV
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