I have one of these eBay GPSDO units that has the Oscilloquartz 8663-XS oscillator (STAR 4+) and I use it to steer a Rubidium standard. What does the time constant value perform and is their an optimal setting? I believe the range for the time constant is 200 seconds and can be adjusted to a max value of 5,000 seconds, I think.
I'm also using using Lady Heather 6.14 b16 to monitor the progress. I'd like to hear from anyone who has a similar setup or experience with this GPSDO unit.
Thanks.