I've also been wondering what garbage is coming in from the wireless
extender through the Ethernet cable into the SBT and possibly out to my
DAC. Not bad data but RF which may affect the jitter of the SBT and
analog performance of the DAC.

I thought that Ethernet cables of a specific type (eg CAT-6) were all
the same and were all shielded. After some quick googling I found there
are important differences. There are unshielded, floating shielded and
grounded shielded.

If the head of he RJ45 plug is metal then its possible that you have a
grounded shielded variety which are used when there is EMI near the
cable which incidentally can affect data throughput. For the grounded
shielded to work the socket needs to be metal as well or have a contact
to chassis ground. If neither ends socket has this then he cable is
effectively floating shielded. Cables with the typical plastic ends may
also be shielded but unless the shield is tied to something the shield
will be floating.  Floating shields do attenuate external interference
to some degree but will also resonate with RFI at wavelengths that are
multiples of its length.

More to come, have to grab dinner.


-- 
HumanMedia
------------------------------------------------------------------------
HumanMedia's Profile: http://forums.slimdevices.com/member.php?userid=44865
View this thread: http://forums.slimdevices.com/showthread.php?t=93316

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