Hi
> On Jan 9, 2017, at 6:06 PM, Jay Grizzard <[email protected]> wrote: > > Does anyone know of any schematics for amplified GPS splitters floating > around out there? I looked a while back and couldn't find anything. I use a > 58536A right now, but it's big and I hate having to have N to SMA cables. It > would be awesome to be able to roll my own with all the connectors I want on > it… The standard design is pretty simple: 1) DC bias coupler on the input 2) Protection on the input 3) Saw filter on the input (say -3 db) 4) Fairly normal (Mini Circuits) low noise amp with appropriate gain (say 12 to 18 db) 5) two way splitter for the two banks of outputs (-3db) 6) two way splitter to each output (-3db) (obviously a 4 output device) 7) 3 db (to 9 db) pads on each output 8) DC blocks on all but one output. 9) DC bias coupler on the one “magic” output. Some designs put a second filter after the amp. Some designs use ceramic filters rather than SAW’s. Some designs go up to quite a few (like a dozen) outputs. Some have external power rather than the bias pickoff / pass thru. Bob > > -j > > On 1/9/2017 12:43 PM, Hal Murray wrote: >> The other is a "real" GPS splitter such as the HP.Symmetricom 58535A or >> 58536A. They usually have N connectors. They usually include an amplifier >> so you don't see the 3 dB loss. (They get power from the coax the same way >> the antenna does.) >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
