[time-nuts] Question on GPS receiver selection for 1pps

[paul swed]

Thanks for the response.
As I have dug a bit deeper.
65 channels makes no sense. Sales gimic.
I do see one stated at 2 ns, a trimble.
So indeed there are tighter specs.
Thanks for the hint

On Wed, Nov 17, 2010 at 8:16 PM, <SAIDJACK at aol.com> wrote:

> Hi Paul,
>
> "good enough" is in the eye of the beholder..
>
> The M12M receiver can achieve 2ns rms. So 300ns seems very bad.
>
> Some early units had up to 1000ns error, so 300ns is quite good in that
> context.
>
> Anything below 30ns from the GPS (with sawtooth correction) should be
> excellent by today's standards..
>
> bye,
> Said
>
>
> In a message dated 11/17/2010 15:02:15 Pacific Standard Time,
> paulswedb at gmail.com writes:
>
> When I  look at sparkfun as an example there must be 30 plus receivers with
> a
> crazy  65 channels.
> New receivers seem plentiful. About the only data I see is the  1 sec pps
> is
> 300ns as an example and cep is 2.5cm.
> Is that good enough  for a gps locked oscillator?
> Does it matter since the system is locked over  many seconds?
> Thanks in advance appreciate your help and  comments.
> Regards
> Paul
> WB8TSL
>
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