Any CCTV videao channels available with digital cable?

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I currently have Comcast basic analog service coming into my home.  I
send this to my distribution amplifier via a low pass in-line
transformer that basically only allows the channels below channel 103
or so to pass through.  This is so I can "clean up" the bandwidth
above channel 103 to modulate my CCTV security cameras onto and view
security cameras just by going to those modulated channels, just like
switching TV channels.  I only use the tuners in the TV's because we
dont have premium channels.

Now I am thinking of switching to Comcast digital service and getting
some premium channels.  I realize that I will need converter boxes for
whatever sets I want premium channels.  But I'd still like to be able
to keep an analog signal alive throughout the house with my filter
xformer and CCTV camera modulators.  For the TV's where I just want to
use the built in tuner.

Will I have any issues with modulating my 4 CCTV cameras to their
current channels 124, 121, 118, and 115?  Or must I rethink how I can
use my modulated CCTV cameras in a digital Comcastic world?  I do have
2 runs of RG6 to every room only one of which is currently being used.


What frequencies can I allocate for CCTV use with digital Comcast?
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The title of my post was misleading, so I changed it to reflect what
channels can I allocate for my own use if I have Comcast digital.



Re: What frequencies can I allocate for CCTV use with digital Comcast?

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Not quite what you asked, but most cable companies will have A channel set
aside for apartment building lobbies to broadcast their secuirty video. Im
my case (Rogers) it's Channel 2 on the box or real frequency is channel 59.
I found the menu codes for my box on the net which lets you view the actual
frequency and strength of a given channel. I also sent an email to customer
support to confirm this, telephone support was less than useful.

Be careful though, as cheap filters will block the uplink signal for PPV
purchases etc. I bought a pricey Channel Vision notch filter for channel 59
and it was useless for what I wanted. I was using channel 125 for a while,
but then I slowly started losing channels. I think the filter was screwing
up the channel authorizations somehow.

Other people here have recommended TinLee.com for filters.



Re: What frequencies can I allocate for CCTV use with digital Comcast?
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Thanks, mine is the $35 Channel Vision (passive transformer) shelving
filter (low pass for anything under 103 or so).  I used the high
channels because there was no programming there so shelf filter
instead of notch.  Thats interesting that they accomodated modulating
of commercial security cameras, I'll have to assume that they have to
maintain some empty channels even if going digital, to not upset
commercial security.  I'll call Comcast I guess.



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