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Thread: Zetron 45B No Rx Audio

  1. #1
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    Default Zetron 45B No Rx Audio

    Picked up a Zetron 45B and trying to tie it to a XPR8400

    I cannot get the Rx audio to function, I'm using pretty much the same pinout as recommended in the System Planner

    Everything works great, except phone callers can't hear the mobiles, nor will the 45B recognize when a mobile transmits DTMF but COR and PTT and Tx Audio work fine


    Setup worked great for a long time with a old Zetron Model 35AR, with just Trbo Pin 14 fed to Rx Audio connection.....so much for being a simple changeover

    Suggestions?

    zetron.jpg


  2. #2
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    Input level to the controller turned all the way down in the controller? Does the controller function with another repeater? Is the controller known to be working?

  3. #3
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    I haven't checked this, but make sure there is no DC component on the DISC out. If there is, make sure you bypass it so the controller doesn't affect it.