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Old 06 September 2016, 07:09   #1
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NMEA extension link to GPS out

The radio is about 1m from the gps and i need to join the nmea out from the gps to the radio nmea in with an extension link. Will any electrical link wire do or should I use a specific guage of wire?
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Old 06 September 2016, 09:11   #2
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The radio is about 1m from the gps and i need to join the nmea out from the gps to the radio nmea in with an extension link. Will any electrical link wire do or should I use a specific guage of wire?

In theory any cable should do over that length. I used some 2 pair screened telecoms cable, burglar alarm cable will do, any light data cable. If you have an old serial cable kicking about, that would be ideal. If you use screened, try & Earth the screen.


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Old 06 September 2016, 09:19   #3
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Serial cable excellent idea thanks.
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Old 07 September 2016, 11:13   #4
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NMEA signals are pretty low power. The factory wires are on the order of 26 or 28 gauge. Pretty much anything will do. Should only be 2 to 4 conductors in use (depending on if your connection is uni- or bi-directional.)

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Old 11 September 2016, 15:04   #5
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Jky sorry for the delay. It should be bi directional. Therefore should I just have one listener and one talker (2 wires) connected or both listeners and both talkers (4 wires)? Cheers
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Old 11 September 2016, 15:11   #6
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At the moment the garmin echo map dv50 has the GPS coordinates on screen but the icom is showing no connection. Odd cos it's wired up. Could it be that a GPS signal is only sent when the thing is moving as it is just sat in the garage now? The Garmin does have a full GPS signal though.
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Old 11 September 2016, 16:51   #7
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the Garmin echo map has the following 4 wires;
Blue - NMEA 0183 internal port 1 Tx (out)
Brown - NMEA 0183 internal port 1 Rx (in)
Gray - NMEA 0183 internal port 2 Tx (out)
Violet - NMEA 0183 internal port 2 Rx (in)
The Icom has these 4 wires;
Brown Talker B (data-L) connects to a NMEA in negative line of NMEA0183 DSC equipment to receive position data
White talker A (data-H) connects to a NMEA in positive line of NMEA0183 DSC equipment to receive position data
Green listener B (data-L) connects to a NMEA out negative line of a GPS reciever for position data
Yellow listener A (data-H) connects to a NMEA out positive line of a GPS reciever for position data

So which joins which and how many of them need joining to eachother please?
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Old 12 September 2016, 11:44   #8
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Sorted...out.
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Old 12 September 2016, 12:04   #9
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Sorry, Red Fox; been busy. Glad you got it worked out.

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