Plotter No Fix

[gavin400]

My Raymarine Plotter L760 has been taking increasingly longer to gain a fix, until recently when no fix obtained
Have changed the battery in the reciever Raystar 120 with no success, and have wired in a replacement reciever but still no fix

Raymarine support say the unit is long obsolete and cant help - not even any suggestions

I think there may be something in the menu which tells me how many, if any, satellites it is connected to and I will try that
Anything else I might try?

Worst case scenario - if I buy a new unit do you think it can still be connected to the autopilot and radar as the current set up is - autopilot and radar will be same vintage as the plotter

Many thanks

Gavin

 

[ChromeDome]

Your plotter, and therefore presumably other devices, are NMEA 0183 compatible so any new device that meet this requirement will be able to communicate with the other devices.

However, the latest NMEA standard is "2000" which recent devices normally can do, some of them without the 0183 standard.

 

[laika]

If you don't have a manual there's one here and GPS setup including satellites is in section 6.6:
Box

By "have wired in a replacement reciever" do you mean you tried another seatalk GPS? Are you using the seatalk or name version of the rs120 and if "seatalk" are the other instruments on the bus talking ok (ie is the plotter getting heading if you have a fluxgate compass connected to the pilot and the pilot connected to the plotter?

If you're using a seatalk gps, try an nmea-0183 one if you can borrow it from someone else.

If you replace the plotter with something modern, while I'm not familiar with these devices I'd lay good money a new plotter won't repeat the display of your old radar. If your autopilot and instruments are on seatalk, raymarine's seatalk1<->seatalkng converter does a reasonable job of converting between the old and new protocols.

 

[gavin400]

The replacement reciever is not a Raymarine branded one, but is supposedly compatible with the plotter
Yes, the plotter still recieves heading from the compass
Im not too fussed about the radar display on the plotter - its just what was on the boat

 

[vas]

when you say wired a new gps antenna (that's what I get as receiver) did you use the (at a guess) longish cables already installed and replaced the antenna only, or did you try wiring the (old or) new antenna straight in the plotter? Maybe there's an issue with the cabling and you replicate that by keeping the failing wiring in the game.
what's the distance between plotter and gps antenna?

I had a raystar 120 gps antenna once and it did need the cr2032 (iirc) battery replaced, but was straight forward and worked fine after that. Did you measure the v on the battery you removed on it?

 

[gavin400]

I have connected a new reciever complete with new wiring