[time-nuts] Discipline a rubidium driven net4501 with a Garmin LVC 18?
Mark Sims
holrum at hotmail.com
Fri Oct 15 16:26:39 UTC 2010
Many... but a lot boils down to the fact that the Tbolt is designed from the ground up to be a time (and frequency) source. Its 1PPS output can be stable to within a few nanoseconds and the frequency to a few parts per trillion. The Garmin 1PPS output is spec'd at 1 microsecond, plus you get no frequency source.
The LPRO seller is almost certainly getting his LPROs from the Chinese recyclers, just like everybody else. You can get a complete LPRO kit delivered to Germany for $80 (or less). Tbolts for a few dollars more. Ebay is your friend.
Search for RUBIDIUM and you will also find a guy selling a divider card that takes the LPRO output and generates several clocks, including 1 Hz... cheaper and more versatile than the FATPPS
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Is there any specific reason why a 1PPS signal from another source (like
a Thunderbolt GPS disciplined clock) together with a FatPPS board would
give better results as my Garmin approach?
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