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[TG11] No Fix, TX timeout at fixed time
05-12-19, 09:47 PM
Post: #4
RE: [TG11] No Fix, TX timeout at fixed time
Hello Crossroads,

Only seeing 4-5 satellites with comparatively low signal levels is consistent with either a poor contact to the GPS antenna (signal loss in the cabling) or high background noise. Background RF noise can come from almost any electrics or electronics - we've seen terrestrial TV tuners, voltmeters in distribution panels, LED light drivers, USB devices and chargers and more cause crippling interference in the past - and the culprit doesn't have to be something that's 'turned on' with its power button. If it's getting power it could well be 'on' and emitting noise even if it doesn't appear to be active. This is especially true of electronics which usually draw some standby current.

All this being said, cuts/splices in GPS antenna cabling or inline joiners and extension cables are common causes of this sort of problem too.


Raymarine since 1999.
Interests: Diagnosis of problems in sonar/fishfinders, NMEA2000, ethernet comms, autopilots, thermal cameras
Location: Sydney, Australia.

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RE: [TG11] No Fix, TX timeout at fixed time - Tom - Raymarine - Moderator - 05-12-19 09:47 PM

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