Cable TV Wiring
 

Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

Cable TV Wiring
 

SMS wrote:
Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

IIRC any splitters on digital must be "2 way". Most cheap splitters
are one-way. IOW, the digital cable box needs to transmit info back to
the head-end. Older analog cable boxes did not.

Cable TV Wiring
 

On Feb 24, 1:39�pm, SMS wrote:
Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

did you use RG6 or RG59, any screw on connectors?

you shouldnt use RG59 or screw ons for digital cable installs..

both are way too lossy, and this applies to satellite tv as well.

how many splits do you have? might need a distribution amplifier

Cable TV Wiring
 

On Sun, 24 Feb 2008 10:39:12 -0800, SMS
wrote:

Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

The cable company does the wiring when you pay for it.

Call the cable company and tell them about the problems you are
having.

Cable TV Wiring
 

Cable TV Wiring
 

SMS wrote:
Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

Hook the TV up to the incoming feed - that is, before all your stuff.

If the TV works, the problem is yours. If not, call the cable company for
guidance.

Cable TV Wiring
 

The wiring from the street is RG59, probably about 20'. All my wiring is
RG6, about 60'. One of the existing outlets has about 4' of RG59 from the
splitter, but the outlet that I tried the digital box on was all RJ6,
except the old RG59 from the street. I could change the outlet with the
RG59 to RG6 if necessary, and I suppose I could also change the wiring
from the street.

RG59 cable is not your problem. You will never tell the diffference between
RG59 and RG6 for short runs like you describe.

Don in Tracy, Calif.

Cable TV Wiring
 

On Feb 24, 1:39*pm, SMS wrote:
Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

Hi SMS,

I agree with Reed. For digital you usually need two way. We have
Cablevision here. They have these channels for car shopping and house
shopping. From the remote you can request new data. You can also
request movies etc. This requires two way communication.

If you have multiple TV's, and have alot of cable runs then a
amplifier that enables you to split off each feed may be useful. You
need a amplifier which allows two way communication. I got mine from
here http://www.cabletvamps.com/.

I have an Electroline EDA-FT-8100 and it works for me.

All the best, Mike.

Cable TV Wiring
 

Reed wrote:

SMS wrote:
Yesterday I wired a relatives house for cable. The analog cable works
fine, but when I plug in the digital cable box supplied by the cable
company it doesn't work at all. Is there anything special about
splitters for digital cable? I use Dish network, and I've really been
out of the loop as far as cable TV stuff. This is not Comcast, but a
small municipal cable company.

IIRC any splitters on digital must be "2 way". Most cheap splitters
are one-way. IOW, the digital cable box needs to transmit info back to
the head-end. Older analog cable boxes did not.

Splitters are not one-way or two-way, they all will pass signals in
either direction with the same predictable loss of 3.5db per split.
Where the cheap splitters have problems is with shielding and bandwidth.

You shouldn't be using any splitters not rated for at least 1GHz
bandwidth and 110db shielding on any cable system these days, and a few
cable systems as well as satellite may require a higher bandwidth.

Also, older analog cable boxes did indeed sent return data to the
head-end for things such as pay per view buys, things that far preceded
"digital" cable where the A/V is transmitted digitally.

Another thing to keep in mind is that many of the digital cable boxes
need to be plugged in and receiving data for quite some time before they
will work properly.

Cable TV Wiring
 

Pete C. wrote:

Splitters are not one-way or two-way, they all will pass signals in
either direction with the same predictable loss of 3.5db per split.
Where the cheap splitters have problems is with shielding and bandwidth.

Yes, they are combiners or splitters, it doesn't matter which way the
signal goes.

Another thing to keep in mind is that many of the digital cable boxes
need to be plugged in and receiving data for quite some time before they
will work properly.

I'm pretty sure now that there's one of two problems. They may have been
distributing the digital boxes to all customers in advance of the
disabling of analog cable, even if the customer didn't sign up for the
more expensive digital service, or I didn't leave the box plugged in
long enough (about 5 minutes).

Cable TV Wiring
 

On Feb 25, 12:55�am, "RVer Don" wrote:
The wiring from the street is RG59, probably about 20'. All my wiring is
RG6, about 60'. One of the existing outlets has about 4' of RG59 from the
splitter, but the outlet that I tried the digital box on was all RJ6,
except the old RG59 from the street. I could change the outlet with the
RG59 to RG6 if necessary, and I suppose I could also change the wiring
from the street.

RG59 cable is not your problem. �You will never tell the diffference between
RG59 and RG6 for short runs like you describe.

Don in Tracy, Calif.

it can be because too many splitters decrease signal strength fast,
then add lossy cable 59 tends to be junk quality often dollar store
stuff........

Cable TV Wiring
 

SMS wrote:

Pete C. wrote:

Splitters are not one-way or two-way, they all will pass signals in
either direction with the same predictable loss of 3.5db per split.
Where the cheap splitters have problems is with shielding and bandwidth.

Yes, they are combiners or splitters, it doesn't matter which way the
signal goes.

Another thing to keep in mind is that many of the digital cable boxes
need to be plugged in and receiving data for quite some time before they
will work properly.

I'm pretty sure now that there's one of two problems. They may have been
distributing the digital boxes to all customers in advance of the
disabling of analog cable, even if the customer didn't sign up for the
more expensive digital service, or I didn't leave the box plugged in
long enough (about 5 minutes).

5 minutes probably wasn't long enough. The data channel used to update
the box is pretty slow, and the longer the box has been offline the more
updates it may need. I had a digital box here that sat disconnected for
about a year, and when I hooked it back up it took sitting overnight
before it started doing the digital channels properly. Presumably the
updates include things like CODEC software which could take a while.

Cable TV Wiring
 

Pete C. wrote:

5 minutes probably wasn't long enough. The data channel used to update
the box is pretty slow, and the longer the box has been offline the more
updates it may need. I had a digital box here that sat disconnected for
about a year, and when I hooked it back up it took sitting overnight
before it started doing the digital channels properly. Presumably the
updates include things like CODEC software which could take a while.

I hooked up the same type of box at another relative's house in the same
city, and the digital cable worked right away. But I'll still have them
try just leaving it plugged in. I do all this on the weekend, and it's a
small municipal cable company with no one to call on the weekend for
questions.

Cable TV Wiring
 

SMS wrote:

Pete C. wrote:

5 minutes probably wasn't long enough. The data channel used to update
the box is pretty slow, and the longer the box has been offline the more
updates it may need. I had a digital box here that sat disconnected for
about a year, and when I hooked it back up it took sitting overnight
before it started doing the digital channels properly. Presumably the
updates include things like CODEC software which could take a while.

I hooked up the same type of box at another relative's house in the same
city, and the digital cable worked right away. But I'll still have them
try just leaving it plugged in. I do all this on the weekend, and it's a
small municipal cable company with no one to call on the weekend for
questions.

It's always possible that the cable box is bad, or that there is a
problem in the cable plant itself, like the closest amp to the house
that is preventing the return signal from going back to the head end. If
the cable system just started doing interactive and digital that
possibility is greater.