Lowarance question.

MarkM · 04 February 2007, 08:43

For 3 years I've the Lowrance GlobalMap 7000 C with the LGC-12w GPS module (antenna). Every so now and than there is a very weak signal from the satelites. Two or three dark blue bars in the satellites page. Or two light blue bars. Sometimes there is navigation but no speed notation.
My friend with the same unit but in another part of Holland has no problems.

I know about the satellites and there positions, trees and buildings beeing in the way. I've sprayed WD40 in the antenna plugs with no solution. Who can explain and solve this problem? I would be very grateful.

jyasaki · 05 February 2007, 17:11

Any radar sets in operation when you have the problem? Mid-range radar emissions can screw up GPS reception (seems to happen more with older antennae), and high power emissions can kill the GPS antennae.

You might try cleaning the top of the module with a mild solvent. Probably won't help, though.

Other than those, I know that some of the Lowrance GPS modules were a bit sketchy in operation. They have had quite a few odd problems, including some that happen as you describe. Unfortunately, there is very little you can do with these things as far as troubleshooting goes - swapping is about the only method; so it makes it pretty tough to ID the actual prolem cause.

Good luck;

jky

MarkM · 05 February 2007, 20:02

Thanks for your reply. I've no radar, but will try to keep the module (antenna) further away from cables, etc. See how that works out.

jyasaki · 05 February 2007, 22:27

Quote:

Originally Posted by MarkM

Thanks for your reply. I've no radar, but will try to keep the module (antenna) further away from cables, etc. See how that works out.

Doesn't necessarily have to be on your boat. Nearby radar sets may cause interference, and nearby radar ground stations are the ones reported to kill antennae (East US coast somewhere... Virginia, perhaps? Some river or bay with a Navy base.)

jky