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Forum: OpenCPN 29-08-2015, 14:10
Replies: 17
Views: 2,887
Posted By Paul Elliott
Re: No GPS if laptop is charging. strange

Hi Richard.

I don't think there is an easy way to isolate the ground on your DC/DC adaptor.

See my previous post about not using the NMEA- connection. I think the ground issue will be...
Forum: OpenCPN 29-08-2015, 11:32
Replies: 17
Views: 2,887
Posted By Paul Elliott
Re: No GPS if laptop is charging. strange

Do not connect the "NMEA -" output signal to the RS232 adaptor. Instead, connect your RS232 ground to your 12V ground (the same ground that connects to the SH GX2200 radio). Do connect the "NMEA +"...
Forum: OpenCPN 29-08-2015, 11:17
Replies: 17
Views: 2,887
Posted By Paul Elliott
Re: No GPS if laptop is charging. strange

[deleted]

It turns out that the SH GX2200 puts out standard balanced NMEA levels. My older model sends unbalanced, but the new model has changed that.
Forum: OpenCPN 28-08-2015, 10:40
Replies: 17
Views: 2,887
Posted By Paul Elliott
Re: No GPS if laptop is charging. strange

Radio Frequency Interference from the 12V laptop supply?

Please clarify though: Do you still have the GPS puck? Or is your GPS source the Standard Horizon radio? When you lose GPS on OpenCPN,...
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