[Test-Equipment] GPS locked base ?

Sun, 28 Dec 2003 10:52:18 +0000

The problem with the 1s pulse is the jitter, which I am told
can be as bad as 1us on the cheap GPS receivers. However I see
that the newer Motorola chips are quoting 2ns (sigma) and 12 ns
(6 sigma) when run in the correct mode.

However in your application you can always increase the gate
time to some arbitrary long interval and just measure the
residual.

73

Stewart G3YSX

TK5EP (Patrick Egloff) wrote:

> Hi All,
> 
> Is anyone using a GPS locked frequency standard ?
> 
> I would like to have a good reference or at least a precise method to use my equipements.
> 
> Has anyone used the 1s clock coming out of a GPS receiver as a frequency meter gate ?? My idea is to use this 1s rate, eventualy divided by 10 to have a 10s rate, and feed it in my frequencymeter to have a precise gate rate. Than measuring a 10 MHz TCXO should give 10000.0000. If not would mean that the TCXO has moved and i can correct it to show the right frequency and have a precise reference. At least at the time of measure.
> 
> Good or bad idea ?
> 
> 73 ans season greetings, Patrick TK5EP.
> 
> http://tk5ep.free.fr
> 
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