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Digital Optical to Analog Converter

Discussion in 'Electronic Repair' started by JohnC, Nov 17, 2011.

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  1. JohnC

    JohnC Guest

    I just purchased a Panasonic Viera Plasma TV model TC-P42S30. Since it has
    no analog audio out for my legacy stereo, I purchased a FiiO Optical to
    Audio Converter Model D3, .But when I
    hooked it up to the TV digital optical out, all I got was a pulsing sound
    from my stereo.. The digital to analog converter worked fine on when
    connected to the digital optical on the Blu-Ray but not on the Panasonic TV.

    I took the converter to the store where I purchased the TV and the sales rep
    connected it to a Panasonic TV and got the same results. Is this converter
    not able to decode the digital signal from Panasonic TVs? Can anyone
    recommend one that will work with my TV?

  2. A related issue...

    Though it's not the source of your problem, you might want to look into the
    possibility of ground loops, especially if you wind up making an analog
    connection between the Panasonic and your system.

    It's difficult to find RF isolation transformers for cable systems. MCM
    sells one -- the #33-8700 that seems to work okay. It's sometimes available
    for ~ $10. You might also want or need a double-F connector, #33-480.
  3. JohnC

    JohnC Guest

    I think that will do it. When RTFM (thanks spamtrap1888) the Panasonic will
    provide Dolby Digital when an ATSC channel is selected and PCM when NTSC
    channel is selected. I'm getting ATSC over the air so I need to convert
    Dolby Digital. Looks like the Gefen unit will do this. I'll get it and
    post back the results. BTW, I could find no menu option to change the
    digital optical out fomat on the TV. Thanks to all for your help.

    The MCM is spec'd at a 2.4GHz bandwidth, so it might provide better
    performance in some systems. (I have no idea what the upper limits of cable
    systems are.)
  5. JohnC

    JohnC Guest

    Yep. That did it. The Gefen DAC successfully converts the Panasonic
    Optical Digital output Dolby Digital to 2 channel audio. Yippee!

    This digital stuff is all new to me.

    Thanks all,
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