[GPS_Standard] Trimble 34310-T oscillator stability?

[Bob Stewart]

Hello the list.  I just built a VE2ZAZ GSPDO.  This is my first GPSDO, so I don't really know what to expect.  I chose (randomly) a Trimble 34310-T as my oscillator.  It seems to wander around a bit, and I was wondering what I should expect from this oscillator.  What I am seeing is up to a +/- 4 count delta per 16 second sample.  The DAC is chasing it around quite a bit, as well.  I'd have to look, but over a 24 hour period, it seems to be +/- 0x0020 or so.  Is this normal?  I'm driving things with a Motorola Oncore UT+ in timing mode (or whatever the term is) with an indoor active puck antenna.  The SynTac software doesn't show anything wrong with the UT+, and it maintains lock with enough satellites that it should be good.

Bob - AE6RV