[GPS_Standard] project status - looking good

[Chris Howard w0ep]

I feel like I'm having some good success with my GPSDO.

I started off with a chassis that had a +/- power supply
already in it which I intended to use for the DAC.
Turned out, when I started my integration
testing that supply failed on me.  And my regulator board
producing +12/+5/+3.3 was getting hotter than I liked.

So I created a +/- 5V supply for the DAC and a new
regulator board.  I also incorporated a 2-transistor level-shifter
for the 1-PPS GPS output from my Resolution-T GPS in a small
board directly attached to the GPS.

I have the thing running now. After 12+ hours of uptime I adjusted the
gross frequency screw so that I'm running, locked, at +0.10 volts.

I don't have a lot of data, but my 150-sample setting is giving me
figures in the 9.xe-10 range.  I'm going to bump up the
sample size and see if I can solidify that.

I feel like I am getting a pretty good understanding of
how to adjust the system.

One software feature that would be helpful is a
tip-over point which would let me set a larger sample
size then shortcut to an adjustment if the tip-over
figure is reached before the sample period ends.