[time-nuts] ThunderBolt question

[Taka Kamiya]

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 <ka3zyx at comcast.net> 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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