Hi,
Yeah, I've seen the Lucent timing pair setup, and shipping cost was for
sure involved into breaking it up into the modules and a cable.
Always nice to see how it all looked.
Cheers,
Magnus
On 2021-10-15 14:45, Bob kb8tq wrote:
Hi
There are ( or used to be ) pictures of the full up cell stations that stuff
like the 3801 and it’s cousins went into. Just how much searching it
would take to find them … who knows. My recollection of them is a
very boring bunch of faceplates in a couple of side by side custom
racks. Couple LED's here / connectors there, not a lot else.
Back in the era when LPro’s were $30, the outfit that was selling the
Lucent timing module with them in it would happily sell you the entire
setup, shelter and all.
Bob
On Oct 15, 2021, at 6:00 AM, Magnus Danielson via time-nuts
<[email protected]> wrote:
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.
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