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Thread: TBS CROSSFIRE with 1.2GHz Video

  1. #281
    Quote Originally Posted by Killerbean View Post
    Yes, I am fpv'ing now for 3 or 4 years.
    I always buyed CP antenna's with ok/good range.
    But last summer i started using lineair (on plane and on the ground)

    20m alt 10km out no problem
    300m alt 30km out no problem
    2k alt 55km out no problem
    400m alt 20km out above very big city's no problem on video (433 was glitching )

    it was a new world to me.
    What'syoursetup?????

  2. #282
    Navigator
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    Mar 2013
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    Russia, Moscow
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    311
    Now I can confirm that Crossfire isn't compatible at all with setups running 1.2ghz video. A week ago I flew 26km and back on my quad using my good old 433mhz LRS.

    Here's what you have with Crossfire:



    Notice what happened starting from 6-7km.

    And here is the flight with 433mhz LRS:



    A very decent signal quality till the maximum distance.

    Filtering and separation of XFire TX from Video RX doesn't help at all. I would like to send it back.

  3. #283
    Quote Originally Posted by cold_dog View Post
    Now I can confirm that Crossfire isn't compatible at all with setups running 1.2ghz video. A week ago I flew 26km and back on my quad using my good old 433mhz LRS.

    Here's what you have with Crossfire:



    Notice what happened starting from 6-7km.

    And here is the flight with 433mhz LRS:



    A very decent signal quality till the maximum distance.

    Filtering and separation of XFire TX from Video RX doesn't help at all. I would like to send it back.
    Your best bet is a real filter on the VRx side or separation (like 30m on a relay, in the -15dBi cone of a pepperbox). I have an inter-digital filter that attenuates Crossfire by -60dBm and only has a 0.25dBm loss in the passband. A cheaper option with -0.7dBm loss is this if you want to try it https://www.minicircuits.com/WebStor...l=CBP-1260C%2B

  4. #284
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    Envoyé de mon iPhone en utilisant Tapatalk

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