This might be of use/interest for a GPS distribution amplifier: http://huprf.com/huprf/wp-content/uploads/2016/03/DA1-4-Manual-V2_03.pdf
On 09/01/2017 23:27, Bob kb8tq wrote: > Hi > > >> On Jan 9, 2017, at 6:06 PM, Jay Grizzard <elfchief-timen...@lupine.org> >> 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 -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.