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So far, 900mhz sucks. What's going on?

Discussion in 'FPV (First Person View)' started by VoicOfReason, Nov 12, 2014.

  1. VoicOfReason

    Aug 29, 2014
    Likes Received:
    So, I finally decided to try a 900mhz FPV system. I got a 1000mw Tx from ReadyMadeRC and attached it to my Phantom 2. It knocked out my GPS. Then, I ordered a 900mhz filter to keep 900mhz from interferring with GPS. It worked! I get a clear video picture with my goggles and a big IBCrazy antenna pair. Here's the problem: I only get about 500ft. out and the signal breaks up into static and when I turn around to come back it is all completely static. What in the world is going on?

    The Tx heats up good, so I think it's putting out a lot of power. But, what's up with this?
  2. SteveMann

    Aug 27, 2014
    Likes Received:
    Westford, MA
    GPS satellites transmit data on two frequencies, L1 (1575.42 Mhz) and L2 (1227.60 MHz). A 900MHz video transmitter shouldn't cause a problem unless the video transmitter is dirty, so that's why they sell the filters. When you turn around to fly back, stop after a few seconds then yaw the A/C 180 degrees. If your image improves then you need to look at your antenna orientation.
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