CCTV over coax (multiswitch, triplex plates)

Dasilva81

Dasilva81

Regular Member
My Satellite Setup
Motorised setup (dark motor) 42e - 30w
My Location
London
Hi good morning

I'm in the process of installing coax and cat5e around my house, I will be installing coax and cat5e to every room.
I will have triplex plates in every room which will have two sat signals
And freeview coming from a multiswitch vision v9-916mpa.

I also have 4 ip cameras around the property which I have going to an nvr with vga and hdmi output. My question is can I integrate this cctv video signal into my multiswitch and have it transmitted down the coax to my faceplates.
This is the faceplate I'm using please see attachment.

Thanks for any help
 

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Yes, quite easy to do, particularly if the multiswitch and NVR are co-located, you can either use an analogue modulator, advantage being they are cheap (requires a composite video feed), or you can do a better job using a COFDM modulator, meaning you can view the NVR as a Freeview channel. Most COFDM modulators will accept an HDMI input, I've seen them as cheap as £220 on ebay, the HD ones do however require the TV to either have an HD Freeview tuner, or an SD tuner which can handle H264. Simply loop the incoming TV signal through the modulator.

PS. There are a lot of crappy analogue rf modulators around, make sure you get a good one.

PPS. Are you only running single satellite feeds to all rooms?
 
rolfw said:
Yes, quite easy to do, particularly if the multiswitch and NVR are co-located, you can either use an analogue modulator, advantage being they are cheap (requires a composite video feed), or you can do a better job using a COFDM modulator, meaning you can view the NVR as a Freeview channel. Most COFDM modulators will accept an HDMI input, I've seen them as cheap as £220 on ebay, the HD ones do however require the TV to either have an HD Freeview tuner, or an SD tuner which can handle H264. Simply loop the incoming TV signal through the modulator.

PS. There are a lot of crappy analogue rf modulators around, make sure you get a good one.

PPS. Are you only running single satellite feeds to all rooms?
Click to expand...


Thanks for the info, yes I will have one coax to each room.

So just to confirm freeview cable will connect to modulator first plus hdmi from nvr and then another cable from loop out to the multiplexer. Then will have to search channels again on my TV?
 
Once I have connected freeview cable to modulator then I would take another coaxial cable and connect from rf out to multiswitch?
 
Yes, either that or use a group combiner to combine the two signals, some people prefer this method, as then if the modulator develops a fault, it doesn't affect Freeview. Group combiner can only be used if your Freeview transmitter's frequencies are in either a high or low group, not spread across the whole band.

I asked about the number of feeds, as most people plan to have two feeds to the main room to facilitate a PVR.
 
rolfw said:
Yes, either that or use a group combiner to combine the two signals, some people prefer this method, as then if the modulator develops a fault, it doesn't affect Freeview. Group combiner can only be used if your Freeview transmitter's frequencies are in either a high or low group, not spread across the whole band.

I asked about the number of feeds, as most people plan to have two feeds to the main room to facilitate a PVR.
Click to expand...
Thank you very much for help I will probably be investing in a hdmi modulator.
Thanks for the info
 
If you run multiple TV channels down one coax you will have to watch your channel spacing and frequency's of those channels, this to avoid interference with each other, some modulators ony have TV channels 3 and 4 to work with, there are some that c an put out up to 4 in the UHF band, but if you use the single channel ones you can't use one on TV channel 3 and one on TV channel 4 then combine them, they are too close together to do this, they will cross talk to each other.

In CATV land we knew about these problems and the channel combiners we used had harmonic filters and intermod filters to stop this problem, you will not find one in the consumer market for under 15K to do this.

So be sure to get a good high quality multi channel modulator to do this.


For analog TV you could get away with one of these hummers.
Code: 
http://www.amazon.com/CHANNEL-PLUS-5445-Channel-Modulator/dp/B00026C4GA

But for digital HD signals it's something along this line, multi channel HD modulators are quite expensive right now.

Code: 
http://www.bhphotovideo.com/bnh/controller/home?O=&sku=943679&gclid=CJWKpY7x08cCFZGBfgodrYYMNw&is=REG&m=Y&Q=&A=details
 
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