RE: Re: TV audio onto HiFi via Kat5?

[Nick Towers]

Thx for replies Mark & Keith,
I'll check wiring & sockets carefully & try again!
WRT Linn wiring, I'm pushing them for technical info which is a bit slow
coming. I'm fairly sure they wouldn't use split pairs, but I wouldn't be
surprised if they use a proprietory wiring scheme for the Cat5 (say pairs
on
1&8, 2&3, 4&5, 6&7), or custom wired patch
leads. Hopefully a few custom
patch leads of my own will sort that out and ensure that split pairs are
not
used, once I get the info..
All thebest
Nick

-----Original Message-----
From: Keith Doxey [mailto:<a
href="/group/kat5-users/post?postID=KUpqPE7uSXWv4O3mzhGpr5di8_2C3Ekp_w3E7xUv8cq2JSdHcqX_8cxMAlHEb-gXQz9q5qjcavm80Ns">kat5users@d...</a>]
Sent: 08 October 2001 12:08 PM
To: <a
href="/group/kat5-users/post?postID=OvLpUXP793WJzlBmT4pVGuUtAGMapfi1LpIE-0zNnIshbU1DQ9qtwpeypktlHlJTDnCOe3PEW8QjYGZwx7QrIEIv">kat5-users@xxxxxxx</a>
Subject: [KAT5] Re: TV audio onto HiFi via Kat5?



Hi Nick,

As Mark has already said, the lack of TV sound is almost certainly
down to incorrect connection. At work we have two identical looking
SCART to 6phono leads that are marked opposite to each other.

KAT5 is designed for LineLevel audio not the output of a cartridge.
The impedance and levels will be incorrect so will not give
satisfatory results.

IMHO, Linn have made a BIG mistake if they have adopted non standard
wiring for their interface. Any home that has structured cable will
distribute the signal over split pairs giving rise to crosstalk and
external interference. The whole concept of CAT5 Structured Cabling
is that any device can be simply plugged into the nearest sockets and
patched.

There is no difference between T568A and T568B other than the
Orange/Green pairs are transposed. Electrically they are identical,
just dont wire T568A at one end and T568B at the other ;-)

KAT5 uses the following

Pair1 Blue 4&amp;5 Left Audio
Pair2 Orange 1&amp;2 Video/Luma
Pair3 Green 3&amp;6 Right Audio
Pair4 Brown 7&amp;8 Chroma

HTH

Keith


--- In kat5-users@y..., nickt@t... wrote:
> Hi all,
>
> Have spent some time connecting various devices together using the
> Kat5 TX/RX modules.
> In general all works very well when connecting Video/Tv devices to
> each other, or audio to audio. However I've not figured out yet how
> to get TV sound onto my HiFi via Kat5. There seems to be no signal
at
> all coming through from the RX unit, although when I put it into a
TV
> it's fine. I'm using a Scart-phono lead converter at the RX end.
Any
> ideas anyone?
> Also, just for the record, I (rather unfairly) connected a
turntable
> with phono output of say 2.5mV over the Kat5 and still got a
> recognisable, even if rather distorted output. (But with a signal
> level 100 times less, I think thats to be expected)
> And lastly, I've decided to blow £800 on a Linn
> Classik "Connectable", a CD player/tuner/amplifier which
comes with
> balanced line inputs and outputs built in. If anybody's got any
> experience of interfacing one of these, or Knekt, or similar, to
> Kat5, let me know, I'll be posting my own experiences on this group
> in case anyone's interested.
> All the best
> Nick
> PS Quick question for Keith or anyone else who may know!: Linn does
> not seem to use standard CAT5 (T568B) pinouts where twisted pairs
are
> pins 1&amp;2, 3&amp;6, 4&amp;5, and 7&amp;8 - they
seem to use 2 twisted pairs on
> pins 2&amp;3 and 6&amp;7 for the stereo balanced line signals,
the other
> wires for control etc (I assume Linn transmits the balanced line
> signals on twisted pairs?!!). Does KAT5 use T568B pinouts? Am just
> concerned that I may need to crimp up a number of nonstandard patch
> leads.



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