Poul-Henning Kamp wrote:
In message <[EMAIL PROTECTED]>, David Kirkby writes:
I've now got
1) Stanford PRS10 rubidium standard
2) Motorola M12+ timing GPS receiver with a 1 pps output.
3) HP 5370B time interval counter.
I'd like to look at the drift of the rubidium before I try to steer it
In message <[EMAIL PROTECTED]>, David Kirkby writes:
>I've now got
>
>1) Stanford PRS10 rubidium standard
>2) Motorola M12+ timing GPS receiver with a 1 pps output.
>3) HP 5370B time interval counter.
>
>I'd like to look at the drift of the rubidium before I try to steer it
>with the PLL. Can anyo
> If you look at the Time Interval once per day you will have 9 ns of
> sigma on the GPS signal which divided by 86,400 seconds is 1E-13. But
> the 9 ns number gets divided by SQRT(n) where n is the number of
> readings you are averaging, so in my case of 1,000 averages the 1 day
> accuracy is
Hi David:
I'm typically getting a sigma of 9 ns from my M12T+ with 1000 averages.
I use the GPS 1 PPS as the start signal to the SR620 TI counter and the
1 MHz output from the Cesium standard as the stop signal. Note that
with this arrangement rollover occurs at 1 microsecond, not 1 second,
b
Hello,
I did more or less the same measurements, and in order to avoid the
uncertainities due to the jitter present in the GPS 1pps output, I
divided the 10MHz rubidium output to 1MHz, and measured time intervals
usign 1pps as start and the divided output as stop.
Regards,
Javier, EA1CRB
D
David Kirkby wrote:
> I've now got
>
> 1) Stanford PRS10 rubidium standard
> 2) Motorola M12+ timing GPS receiver with a 1 pps output.
> 3) HP 5370B time interval counter.
>
> I'd like to look at the drift of the rubidium before I try to steer it
> with the PLL. Can anyone explain how to do this w
I've now got
1) Stanford PRS10 rubidium standard
2) Motorola M12+ timing GPS receiver with a 1 pps output.
3) HP 5370B time interval counter.
I'd like to look at the drift of the rubidium before I try to steer it
with the PLL. Can anyone explain how to do this with the 5370B?
I understand how
