GPS Signal Interference

Discussion in 'John Christner' started by GearJammer0224, Aug 27, 2017.

  1. GearJammer0224

    GearJammer0224 Bobtail Member

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    Alright, guys and gals. A question for you CB wizards out there. Purchased a new CB and mirror mounted antenna for the truck, as we all know these internal factory antennas on the Cascadias are about worthless. The day after I installed everything I started getting a No GPS Signal on my Rand McNally GPS. It would freeze up for awhile and then reaquire the signal. Did this regularly throughout the day. Thought maybe the GPS was taking a dump so I bought a new one.

    Same model GPS as the old one, and after putting it on the windshield, it started doing the same thing. Started thinking it could be the coax I installed so I switched my CB back to the factory installed coax.

    Am I looking at a coax issue or an antenna ground issue here? Any help would be appreciated. Thanks!
     
  2. Mark Kling

    Mark Kling Technology Contributor

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    I would suspect more a ground issue. The GPS antenna on the 730 is on the top. I suspect you have spurious RF floating around.
     
  3. mhyn

    mhyn Road Train Member

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    wow ...RF floating caused GPS receiving problems. as far as I know many US tactical cruise missiles are using GPS to hit targets. GearJammer try to sell your new purchased CB to senator McCain or Pentagon's researchers. :)
     
  4. Mark Kling

    Mark Kling Technology Contributor

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    The TND is not a guided missile. It is not hardened against EMF... so let's try to keep this real.

    I have seen wiring harnesses with the Collision Avoidance system, Tire Monitoring systems, Dash Cams, RF Transmitters (kind to hook a device to your radio), CB mounting all interfere with a GPS device. 99.999% of the time it is grounding on the other device.
     
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  5. GearJammer0224

    GearJammer0224 Bobtail Member

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    It's not unheard of, man. But, you know, a feeble mind will make a feeble response.
     
  6. mhyn

    mhyn Road Train Member

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    Last edited: Aug 27, 2017
  7. TAfool

    TAfool Medium Load Member

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    Is anything close to the GPS? Move all non GPS wires away and provide 6" of clearance from other electronics.

    If my Bluetooth earpiece is charging and gets within 3" of my GPS it will lose the signal until I move it farther away.

    TA
     
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  8. Kamkor

    Kamkor Road Train Member

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    mhyn Thanks this.
  9. MachoCyclone

    MachoCyclone Road Train Member

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    A couple of nights ago around 3am from the west side of El Paso (I-10 & Loop 375) to the east side (I-10 & Loop 375), I had no gps signal. Signal came back just as I passed the loop. Then somewhere between El.Paso and the Border Patrol check point, gps had no signal for a couple of minutes. No clue what cause it, but it was weird. Hasn't done it since.

    20170904_132757.jpg
     
  10. Kamkor

    Kamkor Road Train Member

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    I've been experiencing loss of GPS a lot lately. Nothing really changed in my truck. I'll watch the GPS diagnostic screen and have 0 signal from any satellite. Sometimes for an hour and miles. Then randomly I'll have them all again almost full strength and 8 foot accuracy. No clue what's causing it. I've had it in its current position for a while now and this is a issue.
     
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