vertical & horizontal polarization shared on one cable

[GregA]

I saw an old thread mentioning that it was possible to put the horizontal & vertical signals down the same cable. My parents would like that possibility... (I'll probably have to argue it through with Foxtel).

Could anyone tell me more - the name of the devices you'd have to buy, costs, anything really that'd help me learn more.

[LeroyPatrol]

I don't htink I understand your question. All receivers can switch H and V signals down the same cable. But you can't have 2 doing it down the same cable. How many receivers do you have? If you have 2 you could use a dual output lnb - one output for each receiver. If more then you need to consider a multiswitch.

Lerou

[it's me]

I saw an old thread mentioning that it was possible to put the horizontal & vertical signals down the same cable. My parents would like that possibility... (I'll probably have to argue it through with Foxtel).

Could anyone tell me more - the name of the devices you'd have to buy, costs, anything really that'd help me learn more.

Looks like you got Poxtel and you want to use a second decoder for free2air? Change the Lnbf to a Dual output Lnbf 10.7 and run second coax, all down.

it's me

[GregA]

All receivers can switch H and V signals down the same cable. But you can't have 2 doing it down the same cable.

I meant down the same cable at the same time, so that one receiver can watch H while the other watches V - they have a Foxtel IQ (ie: 2 receivers). They can't fit another cable down easily, so I hoped perhaps v & h could share by changing the frequency of one.

I have found another way of wiring it - they can run an extra cable down the outside wall through the lower floor's roof tiles into the main bedroom, where they can connect it to one of the 2 existing coax cables that run back to their garage and from there to their decoder. But I'm hoping for a simpler solution.

[big mick000]

One Cable Solution is what you want, but not on foxteL boxes.

[yfz]

A single output LNB can switch between 18 volts horizontal and 13 volts vertical. To do both at the same time would be like having a switch that is On and Off at the same time........not possible

Get a dual output LNB

[mickc]

if you have a iq then you have a dual lnb with both feeds to iq
you need to fit a multiswitch for another reciver

[voltare1]

the op could be confusing cable with sat. he has sat installed which requires 2 feeds to each box to enable access to more than one feed.

cable has both feeds but at different points in the frequency range,

to the op.

if you leave the 2nd box as a single feed, you will be able to access all the main channels but box office and some of the active stuff including ppv may not be accessable to the second box. this is normal for a second box or for multi dwellings that are cabled with only one cable.

just split the main feed cable ignoring the 2nd one.

what exacly is missing on the primary feed?

from foxtels web site,
* FOXTEL Box Office is not available to all multi-dwelling units. <- this i believe is what you will miss out on with one feed missing

[Farmsky]

'One cable' solution is a c-band only variant of wot you are after.

'One cable' keeps the sat IF within the existing Sat IF band ie 950-2150MHz. A receiver with 'one cable' capability is required.

One cable solution lnb's are great for daisy chaining receivers (rf in rf out). All receivers 'see' both C-band polarities at IF.

This is accomplished due to the relatively narrow C-band (500MHz), which allows for each polarity to be 'stacked' in the satellite IF band as follows:

LNBF C-Band single cable solution 3.7 - 4.2 GHz
Manufacturer MTI, Model Number AC15-2CV (for example)
Input Frequency Range H: 3.7 - 4.2GHz, V: 3.7 - 4.2GHz
Output Frequency Range H: 950 - 1450MHz, V: 1500 - 2000MHz
Local Oscillator Frequency H: 5.150GHz, V: 5.7GHz

However with Ku band the RF spectrum is much larger and one polarity occupies an IF of 1000-2050 MHz when using an 11700 lo LNB for example.

So is there a solution?

Well yes ...... but it starts to get a little messy. With Ku, we need to utilise the 50-850 Mhz FTA TV broadcast spectrum to find enough IF bandwidth for two Ku polarities ie 50-2150Mhz or so.

An 11300 lo LNB (tuning 12250 - 12750 MHz) provides a restricted IF output in the range 950-1450MHz. Unfortunately no one makes an 11300 Ku 'one cable' lnb.

[mickc]

you can install the multiswitch behind the iq then run another cable to next stb either way you have to install a multiswitch to run another box to use the twin tuners in the iq

[GregA]

with Ku band the RF spectrum is much larger and one polarity occupies an IF of 1000-2050 MHz when using an 11700 lo LNB for example.

<snip>
....it starts to get a little messy. <snip>
... Unfortunately no one makes an 11300 Ku 'one cable' lnb.

Thanks for the detailed explanation, much appreciated. So no go on the single wire.
I presume I could splice the vertical signal into the regular antenna feed and then extract, but I'm not sure about the affect this would have on the other people using the regular antenna feed.

you can install the multiswitch behind the iq then run another cable to next stb either way you have to install a multiswitch to run another box to use the twin tuners in the iq

I'd need to have 2 cables into the multiswitch though. My problem is I only have one cable :-/

what exacly is missing on the primary feed?

from foxtels web site,
* FOXTEL Box Office is not available to all multi-dwelling units.

FBO is missing, sports on demand, the FTA 2/9/10/SBS, and future HD channels (probably). It's really about helping them have an integrated system, and one that is ready for future expansion.

[custom]

Injecting the vert into the FTA is certainly an option. So long as the FTA is Good and can handle the smalll insertion loss (approx 3db) for the reversed diplexer, the other units will not notice any diference in their pics. You will need 13v at the DLNB, power injector or the like before the FTA launch amp.
ANd a diplxer at your wall pate to the MS and into the IQ.