[time-nuts] using Fury GPSDO with Rb
kirbybq at bellsouth.net
Mon Apr 21 21:07:36 EDT 2008
For question for TomVB; is the shading in the raw plots the noise floor
of the instrumentation ?
SAIDJACK at aol.com wrote:
> Hello Ulrich,
> This is so true. See Tom's phase noise tests of a Russian Rubidium prototype
> disciplined by a Fury GPSDO. Lot's of times there is not much space to put a
> good OCXO inside the Rb's case.
> BTW: using the Fury's 1PPS input, that unit can be used as a cleanup loop
> for dirty Rb's that have 1PPS outputs.
> I just fired up my FTS1200-100 tonight for testing, it's dead on 5MHz. Does
> anyone have a good circuit idea to go from 5MHz to 10MHz? I was thinking of
> something similar to the HP5370B input circuit - basically a tuned amplifier
> locking onto the 10MHz overtone.
> In a message dated 4/19/2008 06:33:21 Pacific Daylight Time,
> df6jb at ulrich-bangert.de writes:
> temperature related frequency changes in a typical flat. Given the fact
> that most rbs's stability at short observation times is worse that that
> of good xtal oscillators this makes the FTS1200 the best choice in my
> GPSDO despite of owning an LPRO101 and an FRK-L.
> Best regards
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