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From: Martin Griffith
Subject: Re: LMH6643 Video Driver Question
Date: Sat, 30 Nov 2002 08:42:49 +0000 (UTC)
Organization: BT Openworld
NNTP-Posting-Date: Sat, 30 Nov 2002 08:42:49 +0000 (UTC)
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On Sat, 30 Nov 2002 05:43:22 GMT, "M.K" <[spam]firstname.lastname@example.org>
>Your make'n complete sence....
>just one thought though....
>for the audio.... could i use a cheaper easy to get audio driver? or should
>i stick to the LMH6643's ?
>will the good ole 741 do the trick ?
>and any idea what i should modify the load resistors in the circut diagram
>for the audio ? video is 75 Ohms... what should i put in place of them ???
>"John Jardine" wrote in message
>> M.K <[spam]email@example.com> wrote in message
>> > When you say "(Putting the audio on top of the video would be very
>> > do you mean running the audio on two seperate line other than the
>> > but housed in the same CAT-5 line ?
>> > any idea's how i would x-mit audio & video on a single twisted pair than
>> > Marc
>> What I was saying, was that electrically modulating an audio stereo signal
>> onto the existing video signal (without sound/vision interference), is
>> technically complicated. I.e trying to put all the vid+audio down only two
>> The best way is as you were thinking ...
>> Put video down 2 CAT5 wires.
>> Put left audio down 2 CAT5 wires.
>> Put right audio down 2 CAT5 wires.
>> Leaving 2 wire spare for power.
>> Your video driver circuits will work from DC to many MHz with little
>> distortion and are quite happy to carry audio or video signals.
>> Hope I'm making sense ;-)
also similar from Analog Devices
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and the small print taketh away..." Tom Waits.
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