Whos in the know about GPS?

Discussion in 'Weapons, Equipment & Rations' started by PartTimeSJT, Sep 5, 2006.

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  1. I used mine whilst at home, went away for the weekend, took forever to find a Satelite, and then when i was back home, i didnt have any look then either, the item in question is the Garmin E-trex ( yellow ) is this normal or is there a fault with the unit?
  2. it really depends where you have been earlier if you were in the sandpit it takes awhile to reconfigure. confession NI for the last 20 years, went to Germany for a while it took a good 30 minutes for the GPS to reconfigure. Garmin ETREX are good but not if you are in a hurry. But great to hide if you go on the Cambrian patrol! :twisted:
  3. Thanks for imput, shall give the lil bugga some time to work .....see if i come up trumps
  4. IIRC, the problem is that it looks for the satellites where it thinks that they'll be. That's fine if you stay in the same place. If you change your location though, the ETrex takes a little time to re-locate itself. 30 mins sounds a bit long though. Obviously takes a bit longer if you're under cover.

  5. It sounds like a fdault in one of the tracking modules
  6. me n bee, is this fault a permanent fault, will it be rectified on its own accord or will it need a specialist to rectify the fault?
  7. If you travel to a location more then 50 miles from where it was last switched on, it willl take a while to go into search the sky mode, then collecting almanac data from a single sat, then ephemeris data. We use 4 different types of gps positioning at work and they are all different with regard to seeing sats. hope this helps
  8. Something else to check is that you have the time and date set correctly. As mentioned earlier, it looks for satellites where it thinks they should be - at the time that it thinks it is.

    It takes longer to initiate if it can only see a few satellites, so if you are in a built-up area, move to a large field, car park or a friendly roof. Put it down (so it's stationary) and walk away from it (so you're not in the way).

    It could still take up to 20 minutes to settle itself if you're a long way from where you last used it, but shouldn't take more than a minute or two next time you switch it on (provided you're in the same general area).

    CAVEAT: Unless you're at Swynnerton. Mine wouldn't work there at all, nor would anybody else's. Satellites must be afraid of it.


    Even though it has worked at home previously, the satellites will have moved, so something that wasn't an obstruction previously, may be now.

    Also added:

    Check the satellite screen while it is searching. The display shows you where the satellites are, both in direction and azimuth. This helps you check for obstructions. The minimum number of satellites it needs to get a fix is three, but this will take ages and it will keep asking if you are indoors. Move to a spot where it is tracking at least five satellites.
  9. Much appreciated guys, shall give it some time to graft
  10. right guys thanks for the help so far ......but ive been thinkin ( scary thought i know ) i can buy the "mapsource" software which will enable me to put co-od's into the E-trex off a PC but i dont mind entering them manually, can any of you tell me of an accurate website for OS were i can enter 6 up to 10 fig ?
  11. I have found that overhead and underground power lines play havoc with the beasts, too, although the later models seem to be a lot better. If you can' t get a lock after 20 mins, try moving 1-200m and starting again.

    Fresh batteries?

  12. Try Google , there are loads of sites dedicated to GPS and how to get the best out of it, or Garmins technical support are just an E-Mail away, they have always been 100% with sorting problems
  13. Is this correct?

    I'm no expert but I as far as I understand it, the principle of GPS works on satelites in geo-synchronous orbits. So irrespective of the time of day or how far the earth has rotated during that period, the satelite will always be in the same place, as it matches the earths orbit.

    My GPS sometimes takes a while to align, especially when I have moved across the world - but no more than a minute or two. I have Garmin GPS 3 Plus and TOMTOM Go 700, and they both take more or less the same time to acquire.
  14. Finally had time to sit down with a cold stella actatwat and set the E-trex down in the bk garden .....after 15 mins she was fully operational ....thanks for the imput guys
  15. one point for future reference, it has been a while but when we went to iraq one of the guys had an e-trex. he had the some problem, but unlike the 12xl where you can select the country manually, we had to do the following for the e-trex: as you switch it on cover the top with your hand to block the receiver, after a while it while ask you if you are indoors, select no then it should ask you if you want to manually select the initiation method. if you let it automatically select then it can take a while depending on how far you have moved since last turning it off. if you manually select the country then it should take less time to initiate.

    p.s. it should tell you all about this in the instructions if you have them or if not look at the garmin website as i am sure they have manuals online there.