On Fri, Mar 4, 2011 at 2:46 AM, Michael Watterson <mike@radioway.org> wrote=
:
> On 03/03/2011 19:25, Manu Abraham wrote:
>>> > =A0What sort of cable is it? Has a coax like appearance. Broadband di=
stribution?
>> Looks like coax, could be broadband. By around 2006 they switched to
>> digital cable, so it could possible be DVB-C as well.
> no such thing.


I guess it is not fiber, due to the distribution amplifiers in the
picture. Fiber cannot carry Phantom power .. (just a guess)


> Fibre is Fibre.
> Twisted pair is twisted pair
> Coax is coax
>
> all can carry baseband or carriers
> Signal can be pure analogue or analogue-ish signals coded with Digital
> information
> (even on the Fibre)
>
> Multi-pair Cat3 phone cable, trunk Coax and multi-fibre optic cable can
> all look the same on outside if designed to be strung on poles.
>
> DOCSIS (Cable Broadband) uses CDMA or TDMA for uplink (usually TDMA) and
> DVB-C for Downlink.


Yeah, I have DOCSIS (Cable Broadband) and DVB-C at my appartment,
that's what I am using presently.


> Coax can carry 5..65MHz DOCSIS uplink, 88.. 108 FM Radio, 110MHz to
> 1200MHz in 8MHz channels, any of which can be Analogue TV, DVB-C regular
> TV mux =A0(multiple Digital channels), DVB-C TV mux carrying "Switched
> Video" or DVB-C carrying DOCSIS downlink.
>
> If you are clever in an Apartment block you can put on ONE coax per outle=
t
> 5..65MHz DOCSIS uplink, 88.. 108 FM Radio, 110MHz to 500MHz in 8MHz
> channels (,any of which can be Analogue TV, DVB-C regular TV mux
> (multiple Digital channels), DVB-C TV mux carrying "Switched Video" or
> DVB-C carrying DOCSIS downlink.)with gap for Off Air reception of DAB at
> 220MHz, 500MHz to 790MHz off Air DVB-T, 790MHz to 900MHz DVB-C and
> 950MHz to 2100MHz from Satellite Dish(es) with 4x Quattro and
> Multiswitch(es).
>
> With suitable gear you can feed 2000 rooms from Cable Company Trunk, DAB
> and UHF aerial and Dish
> http://www.techtir.ie/tv-radio/satellite-distribution
>
> Setup in photo used to feed 64 outlets in 32 pairs for Satellite PVR
> (needs 2x coax). So one 1/2 the system had Cable Company feed and other
> 1/2 had off air TV/Radio aerials. The two coax feed to PVR went to a 4 x
> f-Connector wall plate with 2x Sat/TV 900MHz Diplexers, and sockets
> labelled Cable, Sat, Sat =A0TV/Radio
> 28E, 23E, 19E and 13E on the satellite part of system.
> two sets of helical filters to combine DX aerials on mast for Off Air UK
> TV with Local Irish TV.
> So FM Radio, Broadband, DAB, Analogue and Digital Irish and UK
> Terrestrial TV and 4 x Satellites.(if receiver has Diseqc) 28E on Port
> one as Sky boxes don't do Disecq.


DAB is dead AFAIK.

If you are clever enough, you can all of that on a single Ethernet
cable as well ;-)
http://linuxtv.org/hg/dvb-apps/file/1f246cbf8104/util/gnutv

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