Hi,
Well, designs from before SA off did get better performance, even if not
optimum for the new condition. As they where installed, it did in itself
not cue for a shift, but rather, as the equipment it was installed with
was tossed, these receivers could be salvaged and used on their own. It
would be neat to see how that installation actually looked, because it's
pulled from some chassi and I've never seen how that setup really looked
and was wired.
Other receivers where not integrated the same way, so they would have
longer operational life.
Cheers,
Magnus
On 2021-10-15 02:35, Bob kb8tq wrote:
Hi
The stability profile of the GPS timing signal changed significantly when SA
was turned off.
Things like sawtooth correction that didn’t make much difference in the 1990’s
now did
make a difference. Time constants and OCXO parameters that made sense “before”
didn’t
make sense “after”.
More or less: When you make profound changes in the GPS timing signal, the best
approach
to accurately recovering that signal has to change to match the new signal.
Does everybody
change everything the next day? Of course not. It takes a while for folks to
work out what’s
what with the “new rules”.
Bob
On Oct 14, 2021, at 8:12 PM, Hal Murray <[email protected]> wrote:
[email protected] said:
The other way to look at it: The Z3801 and it???s kin basically went obsolete
in 2000 when SA was turned off. Once that happened, the design approach
changed.
Could you please say more. What changed in the design approach?
Can I tell the difference by looking at a box? Or poking at the serial port?
--
These are my opinions. I hate spam.
_______________________________________________
time-nuts mailing list -- [email protected] -- To unsubscribe send an
email to [email protected]
To unsubscribe, go to and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected] -- To unsubscribe send an
email to [email protected]
To unsubscribe, go to and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected] -- To unsubscribe send an
email to [email protected]
To unsubscribe, go to and follow the instructions there.
