CCTV and camera options? Please Help
 

Hi,
I am interested in adding CCTV or camera options to my existing home
automation/home security.  I have as yet to find a solid way of doing
this.  So I need your help.
What I am interested in doing is as follows:
1)  Hooking up 3 or 4 cameras, placed throughout the house, to feed
video to T.V., VCR, and PC (Computer).
2)  I would like to be able to select which camera I am looking at,
either through t.v. channel or through the pc, manually (by clicking on
for example #1 on the computer for camera 1) or because of a tripped
motion or security sensor. i.e.  Or, ( my alarm goes off, and the camera
at that location, should go on, and start rding, etc....)
I have heard that most camera's feed plain NTSC, through a RCA jack.
From what I know RCA signal deteriorates significantly over distance,
and when it is split.  So I am not too sure as to whether or not go with
RCA, or in fact if I have any other option.
Here is the basic setup I have looked at:
Cameras hooked up through RCA cable to F type connector which converts
the signal to COAX.  The RG-6 coax feeds to another F type connector
which converts the signal back to RCA, which feeds into a multi-channel
modulator (i.e. the Channel Plus modulator), which feeds COAX out to a
splitter which feeds to Cable TV, TV, VCR, PC with TV Tuner Card.
I am not sure if this setup would work, and if there would be any
problems at any of the stages, I was wondering the following:
1)  Would I need to convert the signal from RCA to Coax as mentioned
above or could I use COAX alone and not deal at all with RCA.  Perhaps
there is a Camera with Coax out.  How would I set this up?  What about
just sticking to RCA?
2)  Would I need an individual modulator for each Camera or can I just
get a modulator to handle all the cameras?  and if so, which company and
which model.
3)  Which splitter would you mmend?
4)  Would this setup work?  If so, what modifications would you
mmend?  Is there a better, different, or cheaper way of doing this?
5)  How do I incorporate audio into this whole thing?  and be able to
also select the specific audio feed from where the camera is?
6)  Would I need a multi-plexer, or video switcher, and what use would
these be in this system?
I would really appate any help with regards to this matter, I have
spoken to several people in the business, and they seem to be just as
baffled as me in doing this.
Thanks,
Ali Khosrowshahi
a...@baghaidigital.com or
akhosrowsh...@baghaidigital.co m

- -Alireza Khosrowshahi wrote:
> Hi,
> I am interested in adding CCTV or camera options to my existing home
> automation/home security.  I have as yet to find a solid way of doing
> this.  So I need your help.
> What I am interested in doing is as follows:
> 1)  Hooking up 3 or 4 cameras, placed throughout the house, to feed
> video to T.V., VCR, and PC (Computer).
> 2)  I would like to be able to select which camera I am looking at,
> either through t.v. channel or through the pc, manually (by clicking on
> for example #1 on the computer for camera 1) or because of a tripped
> motion or security sensor. i.e.  Or, ( my alarm goes off, and the camera
> at that location, should go on, and start rding, etc....)
> I have heard that most camera's feed plain NTSC, through a RCA jack.
> From what I know RCA signal deteriorates significantly over distance,
> and when it is split.  So I am not too sure as to whether or not go with
> RCA, or in fact if I have any other option.
> Here is the basic setup I have looked at:
> Cameras hooked up through RCA cable to F type connector which converts
> the signal to COAX.  The RG-6 coax feeds to another F type connector
> which converts the signal back to RCA, which feeds into a multi-channel
> modulator (i.e. the Channel Plus modulator), which feeds COAX out to a
> splitter which feeds to Cable TV, TV, VCR, PC with TV Tuner Card.
> I am not sure if this setup would work, and if there would be any
> problems at any of the stages, I was wondering the following:
> 1)  Would I need to convert the signal from RCA to Coax as mentioned
> above or could I use COAX alone and not deal at all with RCA.  Perhaps
> there is a Camera with Coax out.  How would I set this up?  What about
> just sticking to RCA?
> 2)  Would I need an individual modulator for each Camera or can I just
> get a modulator to handle all the cameras?  and if so, which company and
> which model.
> 3)  Which splitter would you mmend?
> 4)  Would this setup work?  If so, what modifications would you
> mmend?  Is there a better, different, or cheaper way of doing this?
> 5)  How do I incorporate audio into this whole thing?  and be able to
> also select the specific audio feed from where the camera is?
> 6)  Would I need a multi-plexer, or video switcher, and what use would
> these be in this system?
> I would really appate any help with regards to this matter, I have
> spoken to several people in the business, and they seem to be just as
> baffled as me in doing this.

Hi,
Looks like you have an ambitious project before you. As, always, what
you need, depends on what you already have on hand. Your query, though
long, failed to mention, for example, whether you have already some of
the key elements like whole house RF video distribution network, some
form of whole house automation control, whole house IR network and so
forth.
In any case, I'll try to answer your questions with the assumption that
you already have some of these things. BTW, if you don't have at least
some of these things in place, this project of yours can become quite
expensive.
1. The camera output is composite video at 75 Ohms, as such, you must
use 75 Ohm cable. There's no need to use RG6 for this unless you already
have it on hand. RG59 is a 75 Ohm coaxial cable that will work fine for
your composite video runs. At the camera end, you will need an RCA male
to type F female adapter for each camera.
2. I mmend the Netmedia Triple Play modulator(about $300) which can
modulate up to three camera inputs and place them on user defined,
individual channels. Channel 22, say, channel 30 etc.
This gets you to some central location where you have three home made
channels which some how need to be distributed through out the house. If
you already have a central RF amplifier(in the attic say) with whole
house distribution, you must now combine the output of the Triple Play
with the antenna amplifier output, through a two to one splitter. In
doing this, you must take care to adjust the RF levels of the two inputs
to the splitter for best ption. Obviously, also your home made
channels must be unique, not included on your antenna feed.
3. Any RF splitter will work for this, though it might be smart to
choose a splitter that will pass DC voltages, in case you don't already
have some means of whole house infrared distribution. This sould afford
the possibility in the future to inject IR onto the coax.
4. No comment.
5. To incorporate audio, you'll need to buy cameras with built in
microphones or install mikes near each camera. In terms of cabling,
you'll need to run shielded audio cable(3-4 conductors for stereo) from
each camera to the Triple Play modulator. A good quality 3 conductor
microphone cable will work for this purpose. Since the 3 Play has 3
conductor mini phone jacks for stereo audio input, use mini phone
plugs(male) on at least one end of this cable.
If you use this RF scheme as I've described, all you'll need to do to
select a particular camera is to tune your TV's, VCR and Pc Tuner to the
channel for that camera.
6. This job could also be done using composite video throughout. In that
case, you'd need some sort of three in, one out video selector box. JVC
makes one of these for a reaonable price. But you don;t need that for
the RF case I've outlined here.
Now for the automation considerations. You'll need to have motion
detectors placed near each camera. These could be hardwired or wireless
detectors which are a part of your security system or X10 MS12A's or
some such with the appropriate X10 wireless Receiver. You also need some
means to communicate this sensor information to your automation
controller and the controller must have IR control capabilities to the
VCR/TV's so you can implement a VCR Record rule in case motion is
detected on channel 32, say. There are many HA controllers that can do
this job, so I won't be specific here. Note, however, that all of these
will require that you've already installed certain required
infrastructure. Hardwired or RF infrared distribution, for example.
In my own case, I have all the capabilities you described but these were
put in place AFTER I'd installed all the infrastructural components. In
any case, if you want to discuss this in more detail, send Email to me
dily and we can go further offline. All for now.
Regards,
John Stephens

Jim St. John   Jan 16 1998, 12:00 am     Newsgroups: comp.home.automation "Jim St. John" <j...@in.net> - 1998/01/16 Subject: Re: CCTV and camera options? Please Help Reply to Author Forward Print comp.home.automation2b9db0fab114e68d" Individual Message Show original >What I am interested in doing is as follows:
>1)  Hooking up 3 or 4 cameras, placed throughout the house, to feed
>video to T.V., VCR, and PC (Computer).
>2)  I would like to be able to select which camera I am looking at,
>either through t.v. channel or through the pc, manually (by clicking on
>for example #1 on the computer for camera 1) or because of a tripped
>motion or security sensor. i.e.  Or, ( my alarm goes off, and the camera
>at that location, should go on, and start rding, etc....)

Your simplest solution may be to purchase a security camera/monitor package.
Sam's, for one, selss an inexpensive system that includes a qual splitter so
that you can view all four images simultaneously.  I think it's about $300
for the monitor and first camera and $200 ea for additional cameras.
>I have heard that most camera's feed plain NTSC, through a RCA jack.
>From what I know RCA signal deteriorates significantly over distance,
>and when it is split.  So I am not too sure as to whether or not go with
>RCA, or in fact if I have any other option.

The type of connector isn't really relevant.  Actually RCA connectors were
first used for composite video.  And they are coaxial connectors, just a
different style from the more common F connectors.  For baseband video any
75 ohm coax will work fine,
RG-59 is easiest to work with and it's cheap.
Note that the cameras you get with the system I mentioned above connect with
twisted pair cable and modular telephone plugs.  It's pretty hassle-free as
you get power, video, and audio over a single cable.
Also there is a jack at each camera to attach a local sensor such as a
motion detector to trigger a vcr and automatically switch to a full-screen
image from that camera.  I don't know if this is a generic type of interface
or is something proprietary designed for that company's (Exxis) add-on
products.
-jim-

William C. Biggs MD   Jan 24 1998, 12:00 am     Newsgroups: comp.home.automation "William C. Biggs MD" <spamfree.dr.bi...@usa.net> - 1998/01/24 Subject: Re: CCTV and camera options? Please Help Reply to Author Forward Print comp.home.automationd8b5975a662cc921" Individual Message Show original John,
Excellent review.
I am interested in upgrading my video security.
Do you have any sources with good selection of equipment and decent prices??
Thanks, Reddy Biggs

John Stephens   Jan 24 1998, 12:00 am     Newsgroups: comp.home.automation John Stephens <jstephe...@mindspring.com> - 1998/01/24 Subject: Re: CCTV and camera options? Please Help Reply to Author Forward Print comp.home.automation17119795960eb6e1" Individual Message Show original William C. Biggs MD wrote:
> John,
> Excellent review.
> I am interested in upgrading my video security.
> Do you have any sources with good selection of equipment and decent prices??
> Thanks, Reddy Biggs

Hi Reddy,
Yes, I do have a source. Try HomeTech Solutions, Here in Northern
California(Cupertino). They have a walk in store/showroom, expert staff
and good prices. They also operate an Internet business so you can order
online. Their URL is:
http://www.gohts.com
Best Regards,
John Stephens

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