Aren't you going about this in the wrong way? You only need isolation between
the gps antenna and the gpsdo, and not put the gpsdo in the roof. Or am I
missing something? Optical GPS antenna links cable exist, but are expensive.
Otherwise lightning surge protectors should be good enough. Some on
N0UU,
At 10MHz, a very robust toroid wound transformer is easy to construct and can
provide several KV of isolation, with little signal loss. Any low loss powder
iron
core and 15 or 20 turns of silicone rubber insulated wire will suffice for
signals
up to 1 or 2 Vrms.
Pete Rawson
On Jun 2, 20
Hi
A <$3 RF transformer should do the trick. You can put in a couple of them if
you are really concerned.
The optical stuff will work. It's pretty expensive if you want something quiet
enough to be useful.
A jitter of 0.1 UI is considered "ok" for moving data. A 36 degree phase
modulation (
An interesting idea. I have thought about using network SFP interfaces to
isolate the reference in the basement from all else. Tinkered with the
network sfps but as it turns out they are actually somewhat complicated and
as I recall ecl based. How to convert the freq standard out sinewave to ecl
an
I have access to my roof and above through a trap door I had installed when we
built the house. Also have AC in the attic. I've been reluctant to put a GPS
up there with a direct link to the shack and computers, etc. Has anyone done a
simple circuit for conversion from a 10 MHz signal into,
