RE: Audio & video distribution

[Keith Doxey]

Phil is absolutely correct because thats how I told him the daisy chain
worked.

For AUDIO ONLY you could possible get away with star wiring but you would
have to remove the termination resistors from the receivers anyway. With
VIDEO it is a definate NO NO. The reflections that would be setup within
the
different cable stubs would cause severe ghosting at best and at worst no
useable picture at all. Because audio is much lower frequency there would
be
little or no noticable degradation.

By daisy chaining everything is fine.....at least it was when I tested with
5 receivers driven from one transmitter. The important thing is that the
cable gets looped to the receivers hence the temporary need for 2 cables,
they are both terminated on the same jack at the receiver end but separate
at the patch panel to enable interconnection between rooms. The last cable
in the chain MUST be terminated either by resistors or a receiver with the
termination resistors still fitted (standard).

I will try and do a couple more diagrams to add to the site since this
option has now become a reality.

Keith

-----Original Message-----
From: Phil Harris [mailto:<a
href="/group/kat5-users/post?postID=NkdwAnyxWqhukzYWvWbVsd15BIND24NGhHA0cHkS8cxSR_YwhL33aPHtneC759RcWx0KntACkehOLXUzh9oFa8om">phillip.harris1@v...</a>]
Sent: 24 May 2001 11:42
To: <a
href="/group/kat5-users/post?postID=71yp8kOF-KKDI6qdm6SCGTgOQ7Ko4st8sLy-Klosj35r44TfGwwdBO_7XakcZ8EPQaPhFLEc9CFqHyroBtnFuVs">kat5-users@xxxxxxx</a>
Subject: RE: [KAT5] Audio &amp; video distribution



You only need one transmitter but need to take the termination resistors
out
of each receiver *EXCEPT* for the last one in the chain ... think of it
like
SCSI.

Cheers

Phil

By the way ... Keith ran me up a KAT5 "special" for component
video for
feeding my CRT projector (£12.5k when new) and it is ruddy brilliant!

Oh yeah Keith ... can you give me a shout when you have an S-Video + stereo
audio tx/rx pair available that I can buy from you?



> -----Original Message-----
> From: <a
href="/group/kat5-users/post?postID=b7wuHIloy8VhEKJNiGWT409RfQtG74MORv-DFKRzjtW1q_CtNGiMDHNBNL5epAKSBXT7F_5lcYM">nickt@t...</a>
[mailto:<a
href="/group/kat5-users/post?postID=b7wuHIloy8VhEKJNiGWT409RfQtG74MORv-DFKRzjtW1q_CtNGiMDHNBNL5epAKSBXT7F_5lcYM">nickt@t...</a>]
> Sent: 24 May 2001 11:19
> To: <a
href="/group/kat5-users/post?postID=71yp8kOF-KKDI6qdm6SCGTgOQ7Ko4st8sLy-Klosj35r44TfGwwdBO_7XakcZ8EPQaPhFLEc9CFqHyroBtnFuVs">kat5-users@xxxxxxx</a>
> Subject: Re: [KAT5] Audio &amp; video distribution
>
>
> Thanks for prompt response Keith.
> Where I am at present is the final stages (weeks) of my house
> restoration &amp; the planning stages for HA etc - I will get you
to
> supply some units so I can start playing (I also need to prove to my
> partner that the 60 CAT5's dropping into the cellar will have some
> use!).
> WRT daisy chaining - will I need 1 transmitter for each receiver, or
> 1 transmitter for the chain and a receiver for each viewing/listening
> point? IE is the video setup a) source - tx - rx - TV - tx - rx - TV -
> etc
> or b) source - tx - rx - TV - rx - TV - rx - TV - etc. c) For audio
> only could I not just go source - tx - {multiple CAT5's in a star} -
> {(rx - Amp - speakers)in each listening point} ?
>
> I'd have thought there's bound to be distortion/degradation if
> multiple tx - rx conversions of the same signal were necessary, but
> maybe it's not perceivable.
>
> Getting myself in knots - I guess once I have some units things will
> become clearer.
>
> Keep up the good work though Keith.
>
> Regds
>
> Nick
>
>
> --- In kat5-users@y..., "Keith Doxey"
<kat5.diyha@b...> wrote:
> > Hi Nick,
> >
> > Welcome to the KAT5 list.
> >
> > The existing modules can be used for audio only if you wish. A
KAT5
> AV
> > switcher is in the pipeline which can select from any of several
> sources. I
> > am also working on adding Remote control to the existing S-Video
> units.
> >
> > KAT5 was originally designed as a point to point link but I am
now
> able to
> > daisy chain the units. If your house is already star wired you
just
> use 2
> > cables to each room, 1 to take the signal there and one to bring
it
> back to
> > send to the next room.
> >
> > Source-0-A-0-B-C-0-D etc where "0" is your patch panel
at node 0.
> >
> > When the switcher is available you will only need one cable to
each
> room.
> >
> > Source1 - S - Room1
> > Source2 - W - Room2
> > Source3 - I - Room3
> > Source4 - T - Room4
> > Source5 - C - Room5
> > Source6 - H - Room6
> > Source7 - E - Room7
> > Source8 - R - Room8
> >
> > Where the switcher is located either at Node 0 or in you AV rack
if
> that is
> > where all the sources are. In that case you would need a lot of
> cables from
> > AV Node to Node 0 to distribute to the rest of the house.
> >
> > When the MCA unit is ready you could send 2 stereo signals to
each
> room and
> > feed them into different inputs on your amp however I would
> recommend taking
> > the S-Video+Stereo route as you (or the family) will eventually
> want PC
> > based video recorder, TiVo, Digibox, OnDigital etc distributed
> around the
> > house. Mark McCall is already doing this with Showshifter.
> >
> > If you want to do Video and Audio distribution at the same time
you
> will
> > need 2 distribution setups but doing one or the other could be
done
> over a
> > single distribution channel.
> >
> > Any units you get now will be compatable with the switcher when
it
> is ready.
> >
> > Basically KAT5 carries 4 circuits and can be custom built to any
> mix of
> > Audio/Video in either direction so you could have a unit to send
> and receive
> > stereo if you wanted.....at a price :-)
> >
> > I would seriously consider getting the standard S-Video + Stereo
> modules as
> > it will enable you to carry video in the future. It neednt be
video
> > connected to the audio, it could be HA information from your PC,
> CCTV
> > distribution etc. What about if you buy a DVD Jukebox, you will
> need the
> > video distribution then.
> >
> > Hope that answers a few questions
> >
> > Keith
> >
> >
> >
> > > -----Original Message-----
> > > From: nickt@t... [mailto:nickt@t...]
> > > Sent: 23 May 2001 14:52
> > > To: kat5-users@y...
> > > Subject: [KAT5] Audio &amp; video distribution
> > >
> > >
> > > A few questions -
> > >
> > > I'm predominantly interested in putting together a
multi-room
> audio
> > > system across my CAT5 cabling, I have rather less interest
in
> video
> > > distribution (though my kids will not share this view and it
might
> > > prove cost-effective!).
> > >
> > > The Linn Knekt system would seem to be the Rolls Royce
option (at
> RR
> > > prices!) - will KAT5 enable me to do something similar
though? I
> > > appreciate that I'll probably need to wait till Keith offers
the
> MCA
> > > modules, but I'd like to be able to play CD's from a single
> jukebox
> > > in any room of the house (obviously only 1 CD plays at any
one
> time).
> > > Maybe if I get a top quality tuner I'll distribute radio as
well.
> > >
> > > Will a single KAT5 transmitter will put a usable stereo
audio
> signal
> > > onto many separate CAT5 cables? If I use KAT5 receivers on
these
> > > cables in every room, will I be able to have music in more
than 1
> > > room at a time? Will it send stereo signals from 2 sources
(CD &amp;
> > > Radio) over a single CAT5 cable? How might one handle remote
> control
> > > economically (either over CAT5 or other method)?
> > >
> > > On the video distribution front, I assume the above will not
work
> as
> > > well simultaneously, but will I be able to distribute video
over
> the
> > > cabling and watch from a TV any point (ideally not needing
to
> ensure
> > > that my RJ45 leads are unplugged in all the rooms I'm not
using
> the
> > > video signal)? Remote control issues remain the same I
assume -
> again
> > > any suggestions welcomed?
> > >
> > > Answers/comments/hints all gratefully received.
> > >
> > > Thanks
> > >
> > > Nick
> > >
> > >
> > >
> > >
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> > >
> > >
> > >
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