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Thread: Serial port choices

  1. #11
    I finally made my first flight three weeks ago. For the first five flights, my transponder displayed the correct pressure altitude. During the last four flights, the transponder showed an up or down arrow if I was climbing or descending, but the altitude only shows the initial field elevation, i.e. FL009. Serial port 1 is set to AVTN/ICARUS.Is there a way to see the output on the serial port to see what the 4500 is sending to the GTX?
    Last edited by MarkM; 05-26-2018 at 07:10 PM. Reason: Additional info added

  2. #12
    Quote Originally Posted by MarkM View Post
    I finally made my first flight three weeks ago. For the first five flights, my transponder displayed the correct pressure altitude. During the last four flights, the transponder showed an up or down arrow if I was climbing or descending, but the altitude only shows the initial field elevation, i.e. FL009. Serial port 1 is set to AVTN/ICARUS.Is there a way to see the output on the serial port to see what the 4500 is sending to the GTX?
    The easiest method is to set your EFIS to 29.92, then your altitude would be the same as the data sent to the transponder.
    Bob Leffler
    N410BL - RV10 - Flying
    http://mykitlog.com/rleffler

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