Direct multiplication to 9192 MHz isn't used
by any manufacturer of any atomic clock that I
know of, due to its well known disadvantages.
I can state for a fact that it was summarily
rejected by the designers of the 5060/5061
(Cutler, et al). In the 5071, I (being the
RF designer) also summarily
https://www.febo.com/pipermail/time-nuts/2017-May/105566.html
The lock system on the HP5071 is complex and expensive. My plan to
improve the HP5061B is to to use a pair of third overtone crystals
running at 91.9 mc and 100 mc. I have come up with the magic numbers
to lock them together. This el
> On May 31, 2017, at 7:07 PM, Bob kb8tq wrote:
>
> Many systems are indeed going to much tighter holdover numbers. That is
> requiring either a much better OCXO or an Rb as a holdover
So sync limits are going down. 4G-TDD has a node to node limit of 3µs / node to
UTC of 1.5µs. 5g is lookin
If somebody on the list bought that "for parts" Brandywine GPS-4 off of Ebay,
I can tell you it has something wrong in the oscillator or EFC circuit. It
reports an OCXO failure alarm and DAC voltage at the lower limit.
The oscillator is unmarked. It is around 2"x2"x1.25" I believe it has a
I think there will be fewer useful parts.
The reason is integration. In the old days they would buy off the shelf
equipment like a GPS receiver that was inside its own box and was cabled to
something else. A better newer design would be to use a "GPS Chip" can
route the output not using a cable
Hi
The flip side of this is that the number of hardware junkies is not increasing.
The
world is moving to software as the way to do things. As we all move on, our
giant
piles of stuff will have to go to somebody (or the landfill). Most of this
stuff is built
to last a *long* time. There are a f
