[time-nuts] Thunderbolt reception problems
Mark Sims
holrum at hotmail.com
Tue Nov 24 05:19:32 UTC 2009
I just completed a 4 hour run with a Tbolt pimped out with the optimized AMU (1.0), elevation mask (25 deg), DAC gain (3.458 Hz/V), TC (500 sec), and damping (1.2 ... could be better) settings along with the active temperature control. And I wasn't using the fancy pants Sunday go-to-meetin' antenna. Results were PFDG (pretty freqin' darn good) none the less:
RMS of PPS error 2.53 ns, rms of osc error 14 ps, rms of temperature error 26 microdegrees C, max temperature deviation 3.7 millidegrees C (not too shabby for a cardboard box, a little waffle foam, and a PWM modulated fan)
All values were based upon the Tbolts self-reported data values. Due to my horrible location issues, there were some satellite constellation and signal dropouts... things could have been better.
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- over approx what time frame was that RMS average taken?
- what frequency reference did you compare against?
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