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Thread: Poor Range with Crossfire?

  1. #51
    Navigator
    Join Date
    Aug 2015
    Location
    Belgium
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    63
    That picture comes from the support article Perna linked to just above my post. How I interpret this, it's more than a balun.

    As far as power goes, I've scoped it out. My VBatt power rail is already mighty stable, thanks to 220uF low-ESR caps on all ESCs, plus I'm using the mPB from BrainFPV, which has capacitance and LC filtering before the 5V reg. 5V is pretty much a flat line here, apart from the 1200KHz switching noise, which is maybe 20mV peak to peak.

    --edit: You might be right anyway. I measured the black part on a broken antenna (after scraping off some of the paint), and there's continuity to ground, but nothing to the antenna pin.
    Last edited by Glowtape; 15th May 2017 at 12:13 PM.

  2. #52
    Navigator
    Join Date
    Jul 2014
    Location
    Allen TX USA
    Posts
    170
    For best antenna orientation try to fit following requirements.
    Parts labeled with "Antenna" below should be:
    - Separated as much as possible from any carbon or conductive material
    - Separated from the wire going to the receiver
    - As straight as possible

    I stand corrected. Below that picture in the document they have it mounted as a V shape in a Vendetta. Time to get the 3d printer back out and make some sort of V shaped drink straw holder.

    Are you also using a BrainFPV RE-1? Thats what I have in the QAV-X along with the micro vector. That controller and its PDB are amazing.

  3. #53
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    Aug 2015
    Location
    Belgium
    Posts
    63
    I had an RE1, which I broke while scoping some interrupt lines to diagnose a source of jitter in the firmware. I'm running a Seppuku from AirDTF now.

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