[time-nuts] GPS antenna splitter recommendation? (John Ackermann N8UR)

[biwa at att.net]

I use splitters for broadcast satellite stuffs all the time.  My preference is for splitters that have diodes so that all receivers can provide LNB power and at the same time not back-feed any of the other receivers. That way, if any of the receivers fails, any of the remaining receivers can provide LNB power to keep the system up and operating. I would want my GPS system to operate the same way.

However, here in my home shoppe I have two DATUM 9300-53054 receivers running 24-7, and on UPS.  They are each on their own antenna.

Burt, K6OQK 

On April 30, 2020 10:11:55 AM PDT, Chris Quayle <syseng at gfsys.co.uk> wrote:
>On 04/30/20 17:00, time-nuts-request at lists.febo.com wrote:
>> Re: GPS antenna splitter recommendation? (John Ackermann N8UR)
>
>Usually a lurker here, but a couple of points. The best splitters are
>those designed for the task, such as the HP or symmetricom 4 way
>boxes seen from time to time on Ebay, though typically expensive.
>
>There are various issues:
>
>1) The gps receiver will throw a fault if the antenna dc load is
>missing, though a simple fixed resistor load takes care of that.
>
>2) The commercial units provide low noise gain to make up for the
>loss in a passive output splitter.
>
>3) Typically, only one of the receiver ports is specified to provide
>the antenna power and also internal preamp power, with dc isolation
>for the rest.
>
>Can't see that a passive splitter would be an ideal solution without
>serious hackery, when you could build one using the cheap uhf amp
>gain block pcb's widely available now...
>
>Regards,
>
>Chris
>
>
>
>_______________________________________________
>time-nuts mailing list -- time-nuts at lists.febo.com
>To unsubscribe, go to
>http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
>and follow the instructions there.

-- 
Sent from my Android thingamabob with K-9 Mail. Please pardon the spelling errors as the dog can't spell so good.