Can I connect digital aerial cable to satellite cable and still get sky tv?

[DOUBLE+DOWN]

Currently the cable from the sky dish at the rear runs around the side of the house, along the front and into my living room through the window frame. It's now dangling in a number of inaccessible places so I'm considering connecting it to a redundant digital TV cable already in place from my loft into the living room with a F plug coupler and replacing the coxial connector with a F plug connector and then into the Sky Q box. This would eliminate the need for the cable to travel and obviously tidy up the exterior of my house. Can anybody advise if there are any issues with using a previously coxial cable as a Sky Q cable?

[Mark39]

Does your Sky Q box currently use only cable? Usually there are two joined together in a figure of eight. Check the back of your Sky box to see if there's 1 or 2 dish connections.

[nigea99]

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@DOUBLE+DOWN wrote:

Currently the cable from the sky dish at the rear runs around the side of the house, along the front and into my living room through the window frame. It's now dangling in a number of inaccessible places so I'm considering connecting it to a redundant digital TV cable already in place from my loft into the living room with a F plug coupler and replacing the coxial connector with a F plug connector and then into the Sky Q box. This would eliminate the need for the cable to travel and obviously tidy up the exterior of my house. Can anybody advise if there are any issues with using a previously coxial cable as a Sky Q cable?

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The first thing you need to be aware of is that SKY Q requires twin cable  (or 2 separate cables) - each cable carries the different polarisations

(Communal systems using SCR mode only need one but this doesn't seem relevant to yourself)

I don't know the tech specs off hand (I am not an expert) but whilst both are 75ohm the shielding on Sat cabling is more robust and needs to be able to provide constant power to the LNB . I don't think TV coax is as good 

As I say I have not looked up (as yet) the specs but I think at Satellite frequencies the attentuation is likely to be greater  leading to poorer signal.

I think you possibly could get away with it for short distances but not really recommended

Being lazy I will tag our kind expert @Godfrey who is more likely to the tech details (or at least wehere best to get them quickly) 

[Godfrey]

@DOUBLE+DOWN   As we have absolutely no way of establishing the technical parameters of any existing internal television signal distribution cables, all you can do is to 'try it and see'.

It is unlikely to work very well, but you might get away with it, if you have two cables available from your loft to your living room.

Godfrey.

[DOUBLE+DOWN · Accepted solution]

Thanks everybody for your input. There are indeed 2 cables from the dish and those  2 cables both connect to the Sky Q box. I believe the first installation went through the loft when there was only a single cable in use. When upgraded and 2 cables were needed the engineer connected the existing loft cable to the new dish and fed the new second cable around the house. I was trying to avoid having to make another hole in the fascia by using the digital aerial cable already in situ. I suppose I could remove the aerial cable completely and run the second sky cable through the loft and hopefully gain access to the vacated aerial cable hole? Is it possible to have both Sky cables running in parallel or will that cause some sort of interference?