General Question

VoodooLogic's avatar

Will a cable splitter degrade my internet quality?

Asked by VoodooLogic (724points) January 7th, 2008

I have a cable modem and I want to watch cable TV from the same source. If I fork the cable, will it degrade the quality/speed of my data?

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6 Answers

robhaya's avatar

From what the Comcast installer told me when installing my High Speed line is that you should only have one source attached to the line (i.e. Cable Modem). Don’t split the line or share it because it can cause some degradation in data speed.

Keep in mind that the primary source of my cable line has a splitter and one of the split lines is going to my cable modem and the others to my TV’s.

Good Luck!

Fallstand's avatar

Mine is split and I dont notice any differene in internet speed or HD clarity on my TV

sndfreQ's avatar

Digital signals are very sensitive to changes in voltage-what your proposing will definitely ‘half’ the voltage and will surely affect robustness of the up/down signal to your modem.

I’m curious-is this a theoretical question or are you actually considering doing this? Why aren’t you calling and asking the cable company to come out and install a line for your TV? I thought each set top box is programmed from the cable company (each box has a unique IP address just as in your local network and router for internet access). My junction box outside my house has two separate lines for internet and digital cable-the splitter at the box also has a transformer to up the voltage for both lines…just a thought.

VoodooLogic's avatar

I have cable running to the living room as well as each bedroom in my house. While my living room has Cable TV, my bedroom has the modem and router. Since I’m the computer geek, I have to have the modem on my cable line, but I want to experiment with Mythbuntu and PCI cable inputs in my room. The goal is to watch TV on my PC while in my bedroom.

sndfreQ's avatar

Sounds doable if that’s the preset arrangement in your house-whoever did the initial install should have tested line levels for each terminal/node in the house.

The main issue concerns the gauge and quality of the cables in each ‘node’ in your house: If in fact your home is wired up with all-digital cabling vs. a combo of analog/digital cable you will be less likely to run into issues with signal levels and noise in the lines interfering with signal strength/robustness.

It couldn’t hurt to try the new patch, however, if you run speed tests online and notice a significant hit in speed (down or up), I’d call the cable co. to come out and test the lines-they may need to tweak the voltage from the junction box or from the pole outside your house (or other node on your block).

Ultimately it’s an issue of voltage and ‘signal-to-noise’ ratios that change whenever you take a serial line and split into parallel-basic electronics theory.

Japeace's avatar

I don’t know because my connection is on the the jack by it self

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