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JVC 'compulink' protocol question

Discussion in 'General Electronics' started by Alex Bird, Mar 5, 2004.

  1. Alex Bird

    Alex Bird Guest

    Can someone who knows about this please help...

    I am trying to control an old JVC FM tuner via its compulink-1
    connection.

    I have read that the codes sent via compulink are the same as the
    remote control codes. I have programmed the remote protocol (well,
    the only one I could find) into WinLIRC and am transmitting it as 5v
    pulses to the tuner.

    It does nothing.

    I have measured the output on the compulink connections when the tuner
    is operated on a digital scope. It only transmits one code - when any
    preset is selected. The pulse timings of these pulses are an order of
    10 longer than the remote pulse timings I have found online, which
    broadly agree with each other.

    So I tried the remote codes with the longer timings, it still does
    nothing.

    I've tried MSB first, LSB first, positive going, negative going...

    What am I doing wrong??

    Thanks for any help you can give,
    Alex
     
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