14 replies to this topic

[Realist]

Hi all,

Been a member a while but now I need advise.

Have a full CCTV system around the house that I view via a PC monitor but now I want to be able to view it on a TV or multiple TV's around the house.

Whats the best meathod?

Regards all and thanks.

Edited by Realist, 19 December 2011 - 09:40 PM.

[digitalwitness]

Your DVR will have a main monitor out in addition to the VGA you are already using. This will be a bnc connection, this is a composite signal that can input to your tv using the tvs av inputs. This signal could also be fed into a tv distribution system by modulating the composite signal but Really depends on what you have already in situ.

Bnc & vga main monitor outputs may not work simultaneously, depends on your DVR.

[A1Guvner]

.

Edited by A1Guvner, 20 December 2011 - 11:39 AM.

[Realist]

The DVR is made by Xvision X8 with BNC outputs. Im currently feeding the output to a BNC to VGA converter so I can watch it on a PC monitor, so all I need to do is send the feed from the BNC output and direct that into the TV's AV inputs via phono?

Regards

[sixwheeledbeast]

Realist, on 20 December 2011 - 04:49 PM, said:

The DVR is made by Xvision X8 with BNC outputs. Im currently feeding the output to a BNC to VGA converter so I can watch it on a PC monitor, so all I need to do is send the feed from the BNC output and direct that into the TV's AV inputs via phono?

This will only get it to work on that one TV.
If you have a multiway aerial amp on your aerial, you can connect it to all the TV with a modulator.
Like this...
http://www.thesecuri...1-tv-modulator/
Also Read....
http://www.thesecuri...__fromsearch__1

[fozzies]

As swb says.
You will need to set the modulator to an analogue channel. this will be a number between 21 and 69. Dont use 69 though as some tellies wont tune to that channel.
All received tv channels will be using a channel each, depends where in the country you are as to what these are. there is a rule of thumb to avoid cross channel interference.channels cant be 1,5, or 9 channels apart or you end up with problems.
Write down the numbers from 21 to 69 on a piece of paper. now put a circle around each used channel as you work it out ( modern tellies will tell you channel nmbers in the tuning menus. Once that is complete, cross out all numbers either side of a circled number. do the same but for 5 , and then 9 numbers away from each circle. you will now be able to see the free channels available.
Dont forget sky boxes/pvr/vcr's

[sixwheeledbeast]

fozzies, on 20 December 2011 - 07:48 PM, said:

.
You will need to set the modulator to an analogue channel. this will be a number between 21 and 69. Dont use 69 though as some tellies wont tune to that channel.
All received tv channels will be using a channel each, depends where in the country you are as to what these are. there is a rule of thumb to avoid cross channel interference.channels cant be 1,5, or 9 channels apart or you end up with problems.

Link to current channels in use
http://www.wolfbane.com/uktv.htm

I believe channels 35 and 37 are reserved, for local modulators/VCR etc.
I get the best picture on 46, but the north west has completely gone digital so no channels are used.

[fozzies]

Sorry, but thats incorrect. the digital multiplex's still occupy channels up north, just not so easy to work out which ones, and an analogue modulator can and will interfere with those channels. if i see one of the aerial boys this morning i'll try and get a link to what channels those multiplex's occupy.

[fozzies]

Sorry, but thats incorrect. the digital multiplex's still occupy channels up north, just not so easy to work out which ones, and an analogue modulator can and will interfere with those channels. if i see one of the aerial boys this morning i'll try and get a link to what channels those multiplex's occupy.

Edit: your post already has a link to those channels! . btw, its the analogue modulator that will interfere with the digital, not the other way round, unless a really expensive systems modulator is used.

[fozzies]

sorry, edit again, 35 and 37 assigned for in house kit? That saves some effort, as long as not used in house already

[Realist]

I get the drift guys and a big thanks to all for the input and help.

For now its to a single TV but I'll soon run feeds to all when I have time.

Regards,

Brian.

[sixwheeledbeast]

fozzies, on 21 December 2011 - 06:04 AM, said:

Sorry, but thats incorrect. the digital multiplex's still occupy channels up north, just not so easy to work out which ones, and an analogue modulator can and will interfere with those channels. if i see one of the aerial boys this morning i'll try and get a link to what channels those multiplex's occupy.

Sorry but it's not "incorrect".
Analogue is not broadcast in the North West, so no channels are used for analogue.
You can use an analogue modulator on the same channel as your digital reception, but your digital picture maybe effected.

As I mentioned 35 and 37 are reserved for local kit. But you may find that higher up channels have better quality.
Hence 46 for me, because 55-62 have digital broadcast on them.

As for digital transmissions the channel information can be found here.
http://stakeholders....nce/dsodetails/

[fozzies]

Humble appologies swb, i rolled outta bed and answered that one, not at my most careful before coffee :s
what i meant to say is just as you have stated, that an analogue rf modulator will interfere with digital signals, so you still need to choose your channel carefully to avoid loss of digital channels. the 1,5,9 rule still holds true. however, living in london, i wasnt aware they had assigned specific channels to use in home, a great idea though, will make everyones lives so much simpler.
Just to clarify, a channel number relates to a specific frequency, previously the centre frequency, and allows for the analogue sidebands too. with digital transmissions they are using the entire (previous) channel for the multiplex. hence a analogue modulator, which "spills over" onto other channels purely because its cheaper than making one that sits only on one channel, will affect digital transmissions, even if analogue transmissions have been turned off. incidentally, it is possible to buy modulators that do not spill over onto adjacent channels, but they are very very expensive

Edited by fozzies, 22 December 2011 - 05:53 PM.

[sixwheeledbeast]

fozzies, on 22 December 2011 - 05:46 PM, said:

Humble appologies swb

It's cool.

[fozzies]