No subject
Fri Sep 4 12:59:48 UTC 2009
Very few people really "NEED" a Rb or Cs as they are not really doing
anything that requires that level of precision in frequency or accuracy in
time (me included). These days a BC-221 or WWB is not good enough, but 1
Hz at X-Band is for almost all practical uses.
It's a hobby. Just enjoy it!
FWIW,
-John
================
> Rubidium is a 'Secondary' reference, meaning it must be calibrated against
> a
> 'Primary' reference such as a Cesium Beam or Hydrogen Maser or, perhaps,
> your GPSDO. Cesium Beam Standards some times appear on e..y in various
> states of disrepair but are fun to play with. There have been many
> discussions about their merits, or lack there of, on this list and it
> might
> make interesting reading. I am amazed that, in my little shop, I can
> generate something that seems 'locked' to the signal I get from my GPSDO
> and
> requires no calibration.
>
> Your GPSDO is 'linked' to the NIST Hydrogen Maser via the satellites. The
> only problem comes when and if the satellites are not usable.
>
> I am a relative 'newbie' as well, so be careful. This stuff is addicting.
>
> Joe
>
>
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Joseph Gray
> Sent: Monday, October 05, 2009 2:09 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Why would I want a rubidium
>
>
> Sorry for the newbie question, but with two Z3801A's, what use would I
> find
> for a rubidium unit? I see lots of them on ebay from the Chinese sellers.
>
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