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Will A Signal Booster Improve Cable Reception?

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Old 03-20-2005, 08:05 AM   #1
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Default Will A Signal Booster Improve Cable Reception?

Just had Cox Cable installed. I have a 3 way splitter for 2 TV's, and a cable modem. The picture quality is awefull on both TV's, especially on the big screen. Anyone have any luck using a booster, or have any recomendations on a different way to install? I have a Sony 55 LCD projection with a Motorola DCT-6200 HDTV tuner. The HD channels, premium, and the digital chanels come in great. The analog SD is lousy. Should I split them differently?
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Old 03-20-2005, 11:15 AM   #2
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Quote:
Originally Posted by harley05
Just had Cox Cable installed. I have a 3 way splitter for 2 TV's, and a cable modem. The picture quality is awefull on both TV's, especially on the big screen. Anyone have any luck using a booster, or have any recomendations on a different way to install? I have a Sony 55 LCD projection with a Motorola DCT-6200 HDTV tuner. The HD channels, premium, and the digital chanels come in great. The analog SD is lousy. Should I split them differently?
The SD is always lousy on a large screen. You might want to try an amplified splitter. You should consider your cable runs from the splitter to the other televisions. The splitter should be of the proper frequency range. I would take the cable coming into the house and using a one in, two out splitter take one direct to your HDTV and take the other to an amplified splitter. Just a suggestion.
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Old 03-20-2005, 11:27 AM   #3
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I ran the cable directly to the TV after the 3 way splitter and the quality was 100 percent better. The picture quality gets reduced when going through the motorola box. Can I use a splitter with a switch and toggle between HD trough the box and to the TV direct? The 3 way splitter doesnt affect the quality. It only does when it goes through the cable box.
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Old 03-20-2005, 08:36 PM   #4
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Originally Posted by harley05
I ran the cable directly to the TV after the 3 way splitter and the quality was 100 percent better. The picture quality gets reduced when going through the motorola box. Can I use a splitter with a switch and toggle between HD trough the box and to the TV direct? The 3 way splitter doesnt affect the quality. It only does when it goes through the cable box.
You can always try it but it will reduce the signal and may not work at all. The cable box should not affect the picture but the splitter should, so it sounds strange. Any time the cable goes through anything it degrades the signal to a degree. It won't hurt to try.
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Old 03-20-2005, 10:22 PM   #5
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The signal out of the STB is probably RF over Coax of the downconverted SDTV version of the currently selected channel, NOT the full cable spectrum.
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Old 03-21-2005, 12:46 AM   #6
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Default cable runs

House amp decision/usage depends on cable run distances, incoming db signal levels & number of TV's.

The splitter must be a 1Ghz or 1000Mhz. An unbalanced 3 way splitter will have (1) -3.5db & (2) -7db ports. This is typical db signal loss per output.Typically your furthest cable run should be on the 3.5db, but could be your primary TV. The incoming cable from the Cox closure box on the side of the house, is the line continuous or split in the closure box? Is the split in the attic, behind the cable jack or elsewhere? Have you put in a service call? I have noticed a lot of complaints from Motorola DCT-6200 users in various cable tv systems.

What Cox system are you in?

Have them swap the Motorola DCT-6200 for a Scientific Atlanta 3250HD box. If your system uses the SA 3250HD?

I worked for Cox PHX (East Valley) for 6 years & 3 in RI.

If you are having reception issues, let a Cox Field Service Tech troubleshoot. Make sure they verify signal levels on the pole, ped, closure box, splitter in attic/basement & each outlet. They should change all fittings (outside & inside), splitter(s) & jumper cables (depends on visible inspection).

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Old 03-21-2005, 04:42 PM   #7
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Its a whole new install. Complete from the pole, splitter, cables,and all new connectors. I installed an A/B switch and it works great. Only problem is, I have to switch it between HD and SD and also change the TV input. The SD looks great with the cable going direct to the TV. I have COX coming back out on Saturday to try a new Motorola HD DVR. I believe its the DCT-6212.
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Old 03-21-2005, 07:27 PM   #8
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Or...more than likely the standard def analog channels going thru the component cables (or DVI) is the problem. The component cables are bringing out more of the video noise (grainy picture) associated with analog thru those cables. The Moto box is known for that, but personally I don't think it's all the Moto box's fault. It's a combination of both.
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Old 03-21-2005, 11:53 PM   #9
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I added am amplifier and it "overamplified", even at 10db resulting in disabling Ondemand feature of the cablebox. "More" is not necessarily better. It is better to insist that your signal be of high quality entering the house.
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Old 03-22-2005, 06:10 AM   #10
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Quote:
Originally Posted by Danofnj
I added am amplifier and it "overamplified", even at 10db resulting in disabling Ondemand feature of the cablebox. "More" is not necessarily better. It is better to insist that your signal be of high quality entering the house.
VOD requires two-way communications. Your cable amplifier most be unidirectional.
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Old 03-22-2005, 07:38 PM   #11
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Default House Amp

Harley,

Thanks for the specifics of your new install. Almost every time I tried house amps to correct grainy or poor analog cable signals, it just amplified the problem. Most of the time grainy or poor video signals were due to long exterior (100-200ft.) & long interior cable runs (100ft+), more than 3 tv's,etc..

Digital Cable will work fine with lower signal levels, which would cause grainy analog video. With Digital/Sat TV, the image is either there or not (tiled).

Have the Tech try a house amp and see if there is any improvement?
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Old 03-23-2005, 06:54 AM   #12
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Default Signal boost solutions

Quote:
Originally Posted by harley05
Its a whole new install. Complete from the pole, splitter, cables,and all new connectors. I installed an A/B switch and it works great. Only problem is, I have to switch it between HD and SD and also change the TV input. The SD looks great with the cable going direct to the TV. I have COX coming back out on Saturday to try a new Motorola HD DVR. I believe its the DCT-6212.
We have five TV's hooked into our cable, and to get sufficient signal for our digital signal Cox (NC) came out and installed a booster for the outlet with our digital box, which solved the problem as far as getting decent signal. But we are in the middle of a big subdivision and at the end of the line for everything--cable, phone, power. We have had to get the companies to ramp up everything to our block, especially phone line for DSL as more of our neighbors added on. I think we are experiencing that now with cable as more people subscribe to digital services. I added my HD myself (just picked up the new box from the cable office) and if I can get a tech to come out and measure our signal for free, I'll do that. I'll bet they find we are less than optimum.

Jim
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Old 03-23-2005, 08:43 AM   #13
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Quote:
Originally Posted by harley05
Just had Cox Cable installed. I have a 3 way splitter for 2 TV's, and a cable modem. The picture quality is awefull on both TV's, especially on the big screen. Anyone have any luck using a booster, or have any recomendations on a different way to install? I have a Sony 55 LCD projection with a Motorola DCT-6200 HDTV tuner. The HD channels, premium, and the digital chanels come in great. The analog SD is lousy. Should I split them differently?
I'm on Adelphia, up here in N.H. I to have 2 tvs and a cable modem. Here's how mine is set up. cable out of the wall to a 2 way splitter, 1 cable from there to the cable modem and the other to another 2 way splitter. out of that splitter 1 to Sd tv in dining room and 1 to HD (SA 3250) box. Picture is great on demand works.
I think I would deep six the 3 way and try the 2 2ways.
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