50 ohm / 75 ohm question is really irrelevant in this kind of thing. Trmble
itself says in manual, not to be concerned with this apparent mismatch.
In my particular case, I have a home lab standard and existing system. I have
an antenna and network of distribution amplifiers. They are all 50 ohms and N
connectors. Some ports have BNC adapters attached. I have pretty much
standardized everything to SMA, N, or BNC.
I boxed a power supply, T-bolt, and buffer amp in a metal case. I bought a
short cable (RG58) that goes from F to BNC. On back of the case, I have BNC to
N adapter. I also have a few adapters that goes from F to BNC for the test
bench. It really doesn't matter what you use, as long as it makes a solid
connection.
Advantage of F connectors and RG6 are, cheap, abundant, and low loss for the
size. Advantage of having house standard is, less adapters and less
headache.....
---------------------------------------
(Mr.) Taka Kamiya
KB4EMF / ex JF2DKG
On Friday, June 5, 2020, 7:22:33 PM EDT, Robert DiRosario
<[email protected]> wrote:
I have a Trimble ThunderBolt GPSDO that I just received. It has an F
connector for the antenna input, and BNC connectors for the 1 pps and 10
MHz outputs. Is the receiver input impedance really 75 Ohms, or is it 50
Ohms and they just used the F connector to distinguish it from the
others? What do people do, just use a 50 Ohm antenna?
Thanks
Robert DiRosario
KA3ZYX
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