On 07/12/11 02:15 AM, Tim Tuck wrote:
Hi all,
Just wondering how many people have used John Miles work @
http://www.ke5fx.com/tbolt.htm, or similar, to discipline a rubidium
oscillator and if so...
1. what was the RB of choice ?
2.have any measurements of phase noise etc. been published on such a rig ?
3. Are there any published how-to's etc. available ?
I'd like to build such a beast as my lab standard so any help appreciated.
thanks
Tim
I'm no expert on this, but I believe that the rubidiums have poorer phase noise
than crystals, so unless holdover performance is an issue, there is no advantage
in using a rubidium over a crystal as long as GPS lock is maintained at all times.
The Stanford PRS-10 rubidium looks to be quite nice, as it has a 10 MHz crystal
to give good phase noise and also the rubidium for medium term stability. It can
be disciplined easily, as it has a 1 pps input.
Alas the PRS-10 is not as plentiful (i.e. cheap) as some other rubidiums.
There may be better ways, but a PRS-10 and a timing receiver which outputs 1 pps
looks to be a relatively easy way to get the short term peformance of a crystal,
the medium term performance of a rubidium should the GPS get unlocked and the
long term stability of GPS.
I'm looking for a lab standard too, so I'd be interested in what other replies
you get. For me personally, for a short term solution, I'm thinking of using an
undisciplined rubidium.
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
