[time-nuts] ok, newbie questions

[J. Forster]

> Ahh. Very interesting explanation. So is it somewhat correct to assume
> (yes,
> I know) that for a stationary (non-mobile) environment, these extra sats
> don’t make much difference? This seems to be what the explanation is
> saying.

Pretty much, although if your view of the satellites is obscured and you
can't cut trees, the extra birds capability might help some.

> Ok. So let me see. For a frequency standard for use in lab equipment, it
> appears that short term, phase noise and other sources of noise are the
> things to be concerned with  to get better results. These seem to really
> be accomplished with a good oxco.

Yes.

However, if I want a very accurate
> time-of-day clock for long periods of time, then I need long term
> stability which is where the GPS comes in.  Do I have this right?

Yes.

> So if I want a really souped-up freq standard for my lab, then I should
> concentrate on finding the best oxco I can (which may be disciplined by
> the
> GPS or manually occasionally calibrated to GPS), and use the best power
> supply I can find.  These seem to be what I should concentrate on rather
> than more channels.

Yes, and a distribution amp that has good reverse isolation and low phase
noise.

> I do believe that I read some stuff on the internet that the HP GPS DO's
> do
> seem to have very good power supplies (or converters) which contribute to
> low spurs. So it seems the HP's do have a real advantage (not just the
> name).

Don't know.

> Thanks to everyone for the help (hope I am getting the idea here!)
>
> 73 Eugene W2HX

Best,

-John

===============