do yourself a favor and buy a signal amplifer. they plug into a regular
outlet and boost the cable signal so you don't have to worry about loosing
the signal. you run your main cable into (screw on or push on terminal)
the amplifer then out to the feed to the rest of the house by way of your
Sure, but 0 dBm is a robust signal and that level is supplied to many homes
... 0 dbm is a milliwatt (that might not sound like much, but is a huge
signal given the sensitivity of modern television receivers).
Not really, if the gain is adjusted improperly he's just as likely to
have a signal overload at the receivers and poor quality.
We once had a more dramatic case of signal overload at the cable company
on some satellite receivers. Late one evening we changed out the LNBs on
the big 10m satellite dish with newer, better ones with lower noise
figures. We went back in to the head end and noticed that the AGC LEDs
on the 8 satellite receivers fed from those LNBs were all red.
Investigating further we found that the new LNBs were so much better
that they were providing a signal too strong for the AGCs on the
receivers to compensate for. We had to install something like a 6db
attenuator on the feed to make the receivers happy.
We also had to delete a half dozen voice mails complaining about the
hour long loss of a pay per view channel, a channel where we had checked
the pay per view computer and determined there were no buys. Amazing how
people stealing cable are dumb enough to complain about it. If we felt
like it we could have saved those voice mails and let the security folks
track down and prosecute the offenders.
well i have no clue what any of that means, but i'm running pretty much the
same set up as he is and what i described to him, and have never had a
problem. when i've disconnected the amp. i've noticed a difference in the
picture. reconnect the amp and the picture is great. Comcast is our cable
provider and we're not in a rural area or have issues like that, but i'm
running 5 tv's off the regualr feed.
Actually, analog television is more dependent on a clean strong signal than
Hi Def. This is because Hi Def is a digital signal, as long as there is
enough signal to work with it will work. Basically it either works properly
or not at all.
Not entirely true. First off all of the lower tier channels on most
cable systems are still analog so they will be pretty sensitive to
signal strength. Secondly, while digital signals don't gradually degrade
in picture quality like analog ones do, there is still a threshold point
where reception will be marginal and the picture will show significant
digital artifacts due to dropouts.
Why then do some homes have a picture that in all respects is near to
perfect as analog gets and other have snow and ghosting. In other words what
is the range for analog signal strength between best case and drop out. You
say pretty sensitive and visually one wouldn't guess that not to be the
Secondly, while digital signals don't gradually degrade
Isn't the threshold between digital signal showing macro blocking to drop
out pretty small and effected by other factors other then simply the signal
strength. Can't a digital signal be effected by the tuner and reciever
components to a degree that will effect the minimum signal strength it will
On 29 Nov 2006 13:20:49 -0800, " firstname.lastname@example.org"
I ran my cable tv to every room, including 2 bedrooms, one bathroom,
the attic, living room, basement room, laundry room, and kitchen.
That's 8. But I couldn't use an 8-way splitter because I only wanted
one cable going up from the closet to the attic, or down from the
closet to the living room. Every two splitters in sequence, I had to
by a power amplifier. Sometimes I used 4-way splitters, but when you
have unused terminals, you need to screw a cable terminator on the the
threads. They are less than a dollar.
I don't have cable tv anymore but I split the signal coming out of the
x Cable Terminator
1 Continue to Bathroom
2 Continue to bedroom/office.
x UP-Power Amp - 3 Attic tv
4 Bedroom TV
x DOWN -- 5 Living room TV
Down to basement -- 6 Basement TV
X Power Amp -- 7 Laundry Room TV
8 Continue to
Well, I know there is a second power amp in there somewhere. I forget
where. (Probably in the closet right after "UP".) I plugged it in more
than 10 years ago, and I haven't worried about it since. Radio Shack,
i think. I don't buy one until the TV picture isn't good enough. Now
even the farthest tv from the VCR has a perfect picture.
When High Def comes out, I'm not buying 8 high def tvs. I'm buying
one convertor that will convert high def to something my tvs will use,
which will go on the input of the VCR and continue to send the same
signal to all 8 tv's.
Once I had a party with 70 people during the course of the day, 40 of
whom stayed for the movie. 20 watched in the living room, 13 in the
basement, and 7 in the kitchen. Same picture and sound everywhere.
(I didn't let anyone watch in the bathroom.)
When I first had cable installed, I asked the cable guy if he could
put the box in the closet, about 3 feet from the tv. He wasn't sure if
it was close enough, but he did it and it worked . When I was in the
middle of running cable through the ceiling of my basement, the cable
went 30 feet down, 30 feet back, and 30 feet down again, plus 8 feet
up from the basement floor and 5 feet up from the basement ceiling to
the outlet in the kitchen, over 100 feet. And the picture was just
fine. Distance does not weaken the signal much, but splitters do.
But splitters are necessary if you want to run more than one tv.
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