amrad
New member
is it pssible to feed from the same gps information to multiple users like radar navtex and pc navigation program???
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gps-help!!!
- Thread starter amrad
- Start date
mainshiptom
Active member
Yes, as long as they all have the same standard !
Like seatalk for raymarine.
Tom
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Like seatalk for raymarine.
Tom
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snowleopard
Active member
in theory one NMEA transmitter can only service one receiver. in practice 2 or more receivers seem to work OK.
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G
Guest
Guest
GPS Nav group
The URL for the group is with my signature ....... near 100 members - sure to have someone who can answer ....
AND help
<hr width=100% size=1>Nigel ... and of course Yahoo groups :
http://groups.yahoo.com/group/gps-navigator/
The URL for the group is with my signature ....... near 100 members - sure to have someone who can answer ....
AND help
<hr width=100% size=1>Nigel ... and of course Yahoo groups :
http://groups.yahoo.com/group/gps-navigator/
Oldhand
New member
Not true, an NMEA "talker" designed properly to spec should be able to supply up to 4 "receivers" if they are also to NMEA spec. That leaves the question: are all talkers and receivers designed and built to meet NMEA specifications? I doubt it but I have not had any problmes having 1 talker supply 3 receivers.
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cindersailor
Member
Sorry to but in on this thread, but I have also been wondering how to do this. Is it as simple as taking the NMEA wires from the GPS and connecting them to multiple instruments (radar, autohelm, DSC vhf etc.) using suitable "chocolate-box" type conectors? Or will the different instruments object to having their NMEA inputs connected together?
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Benbow
New member
Yes, as long as you have one talker transmitting NMEA you can have several listening in by connecting the output from the talker to multiple inputs.
However there is a limit because the power that the talker is capable of transmitting is very low and each listener 'soaks some of it up'. For the same reason please don't use those disgusting chocky connectors which should not be allowed on a boat IMHO. They give poor connections which corrode and/or shake loose, they also have significant capacitance which muddies-up the signal. Use good quality thin data wire, solder any connections and seal them in adhesive lined heat shrink.
Here's a metaphor: Imagine your talker is sending information in the form of squirts of water down a pipe. Its only got a tiny pump so only sends very small quantities of water for each bit of information, although at quite a high pressure. If you connect a tiny bore pipe to it you can read this information because water comes out of the end in a series of squirts, but imagine what would happen if you connected a garden hose to its output; the squirts would become an indistinguisable trickle of water.
Or imagine the talker is sending out a small number of racing ants to represent a 1...
Sorry I have to go now, the men in white coats are coming.
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However there is a limit because the power that the talker is capable of transmitting is very low and each listener 'soaks some of it up'. For the same reason please don't use those disgusting chocky connectors which should not be allowed on a boat IMHO. They give poor connections which corrode and/or shake loose, they also have significant capacitance which muddies-up the signal. Use good quality thin data wire, solder any connections and seal them in adhesive lined heat shrink.
Here's a metaphor: Imagine your talker is sending information in the form of squirts of water down a pipe. Its only got a tiny pump so only sends very small quantities of water for each bit of information, although at quite a high pressure. If you connect a tiny bore pipe to it you can read this information because water comes out of the end in a series of squirts, but imagine what would happen if you connected a garden hose to its output; the squirts would become an indistinguisable trickle of water.
Or imagine the talker is sending out a small number of racing ants to represent a 1...
Sorry I have to go now, the men in white coats are coming.
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