[time-nuts] High-end GPSDO's
rgdevoe at gmail.com
Thu Aug 16 14:40:57 EDT 2018
I've seen several spec sheets on high end GPSDO's that seem to have
performance approaching a low-noise cesium standard, but only cost $3-6$K
new. One is the SRS FS740 which appears to combine a GPSDO with the
interpolator of the SR620 counter. This gets down below 10(-13) in one day
and drops below 10(-14) for longer times. The other is the EndRun
Technology Meridian II, which has been tested at NIST, as shown in
. This shows a TDEV <2 ns (according to NIST) and and ADEV that gets into
the 10(-15)'s for times longer than 1 day.
Has anyone had any experience with these?
More information about the time-nuts