[ale] OT: transmitting cable tv wirelessly

[John Wells]

Keith,

Thanks for the information.  From what I gather from your message, I would
get good quality from the x10 unit but not as good as s-video.  Is there a
significant tangible difference in picture quality?

It also surprised me that you rank s-video higher than composite, as I had
heard the opposite quite a few times.  However, doing a little more
research proved you right as far as I can tell.

Is NTSC the same composite video as those $30+ monster composite video
cables?  Why is composite video so much more expensive than s-video as far
as cables go, out of curiosity?

Thanks very much for your input.

John

Keith R. Watson said:
> At 09:46 AM 12/16/2002 -0500, you wrote:
>>Very cool.  x10 has their "Entertainment Anywhere" package available
>> for $69.99, but you get a $20 gift certificate so you can end up
>> getting it for $49.99.  This includes audio/video transmission and a
>> remote.  Good deal.
>>
>>The transmitter only sends RF (radio frequency) video.  Am I correct in
>> assuming that you don't get the picture quality you would get from a
>> s-video or composite video connection with RF video?
>>
>>Thanks for the help.
>>
>>John
>
>
> John,
>
> I believe the unit takes NTSC composite video in via an RCA connector.
> This  is not the same as RF video (modulated RF). A VCR usually has NTSC
> video  out and RF out, some have s-video out too. You would connect NTSC
> video to  a monitor and RF out (channel 3 or 4) to a TV with a tuner.
>
> Simply put s-video is better than NTSC (composit video). The reason is
> that  the luminance bandwidth of NTSC video is limited to less than 3.8
> MHz  because of the 3.8MHz color burst on the front porch of each NTSC
> field. If  the video bandwidth gets to close the color burst frequency
> then the  monitor would loose color lock and your colors would begin to
> drift.  Monitors that utilize comb filters can allow for very little
> separation  between video bandwidth and the color burst but it is not
> match for s-video.
>
> S-video splits out chrominance (color) and luminance (brightness) from
> the  video signal. This means that the video can contain more bandwidth
> than in  an NTSC signal with out compromising the color portion of the
> signal.
>
> Crutchfield has a great glossary of video terms at:
>
> http://www.crutchfield.com/infocenter/home/S-Ae2ChkIkZbm/connections_glossary.html
>
>
> Here are the instructions for setting up "Entertainment Anywhere".
>
> http://www.x10.com/instructions/in35a.htm
>
>
> It appears that the receiver has both NTSC composite video out and RF
> out  on channel 3 or 4.
>
>
> Here are the manuals
>
> http://www.x10.com/support/support_manuals.htm
> ftp://ftp.x10.com/pub/manuals/vk62a-om.pdf
> http://software.x10.com/pub/manuals/vk62a-om.pdf
>
>
> keith
> -------------
>
> Keith R. Watson                        GTRI/ITD
> Systems Support Specialist III         Georgia Tech Research Institute
> keith.watson at gtri.gatech.edu           Atlanta, GA  30332-0816
> 404-894-0836



_______________________________________________
Ale mailing list
Ale at ale.org
http://www.ale.org/mailman/listinfo/ale