[time-nuts] using Fury GPSDO with Rb
Tom Van Baak
tvb at LeapSecond.com
Tue Apr 22 03:04:28 UTC 2008
> For question for TomVB; is the shading in the raw plots the noise floor
> of the instrumentation ?
Yes, the noise floor of the instrument, taking into account the
measurement time (which was one hour).
Note the noise of the reference itself isn't removed; for those
plots I used a HP 58503B as the reference.
/tvb
> Brian
>
> 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.
>>
>> _http://www.leapsecond.com/pages/fury/phase.htm_
>> (http://www.leapsecond.com/pages/fury/phase.htm)
>>
>> 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.
>>
>> bye,
>> Said
>>
>>
>> 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
>> Ulrich
More information about the Time-nuts_lists.febo.com
mailing list