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gadgetPool.de :: View topic - 2 GPS units on the same NMEA network
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2 GPS units on the same NMEA network

 
Post new topic   Reply to topic    gadgetPool.de Forum Index -> Seatalk NMEA Bridge
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trespolo
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Joined: May 29, 2008
Posts: 21

PostPosted: Wed Jan 04, 2012 2:05 pm    Post subject: 2 GPS units on the same NMEA network Reply with quote

Hi,

I use a Seatalk NMEA Bridge mainly to trasmit chartplotter info (SOG, COG,..) to Seatalk network of Raymarine instruments and autopilot.
Since I have got also a old handheld GPS unit (used until now only as spare) I would like to put it in NMEA network as alternative to current energy hungry chatplotter .
My question is:
what happens on NMEA and SeaTalk networks if by mistake I switch ON both GPS when both are on NMEA net?
I'm afraid that I can create a dangerous mismatching on NMEA and then on Seatalk.
Could you foresee this case?

Thanks a lot in advance and Happy new years
Trespolo
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FWallenwein
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Joined: Mar 26, 2006
Posts: 419
Location: Mannheim / Germany

PostPosted: Sun Jan 08, 2012 3:39 pm    Post subject: Reply with quote

Hi,

the question is - how could you possibly connect two devices to the Bridge ?

You can not connect them just parallel.
NMEA does not allow to connect two transmitters togehter.

I would not connect two GPS parallel, even if one is switched off.



If you want to have two senders connected to one receiver, you need a multiplexer.
For more info on multiplexer - Click here


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