[time-nuts] Splitting GPS antenna output

bg at lysator.liu.se bg at lysator.liu.se
Wed Sep 2 18:58:27 UTC 2009

Look out for "GPS Source" and "GPS Networking" splitters they are purpose
built for GPS use, and are not limited to L1, like the
Symmetricom/Agilent/HP family of splitters. btw 58535A is the HP 2 port


> Keep an eye open at swap meets etc., or even eBay, for something like an
> http://www.minicircuits.com/pdfs/ZAPD-2+.pdf
> which is a 1 to 2 GHz splitter.  It has DC continuity from 1 and 2 to
> the common.  I put a 100 pF blocking cap in one of the ports, the other
> feeds DC to the antenna.  An R and choke could be fitted if the receiver
> connected to the isolated port complains.
> I used one of these for years when I only had two gps units; now a lucky
> find of one of the 8 way -hp- splitters serves me well, and still has
> one or two empty ports...   -hp- did make a four way one but not I
> think, a two way.
> Incidentally these things and similar are very useful just as boxes with
> SMA sockets, for the usual $1 or so they fetch at swap meets, they are
> well worth grabbing.
> Dan

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