Component Signal Splitting - Canadian TV, Computing and Home Theatre Forums
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post #1 of 5 (permalink) Old 2008-02-07, 12:15 PM Thread Starter
Join Date: Oct 2005
Location: Alberta, Canada
Posts: 23
Component Signal Splitting

I have a bit of a general question.

I have my HTPC and Sat box connected to my receiver via component video. I have been sending my signal to a Panasonic 900 projector with a 30' run of cable with no problems.

I put a 50" plasma display behind the projector screen for regular TV and other things and wanted to split the component output from my receiver to both displays.

I purchased a passive splitter and used it on the component out of the receiver. When doing this, my signal from my Sat box splits with no problems. The signal from the HTPC does not. I get a signal on the plasma, but the projector is black. It's usual "no input," screen is blue.

If I unplug the "Y" connector from the plasma lead AT the splitter, the projector comes to life.

I was wondering if anyone had an idea as to why the signal splits fine from the Sat signal off the receiver, but not the HTPC signal off the receiver?

Would a powered distribution amplifier solve this problem?


htimst is offline  
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post #2 of 5 (permalink) Old 2008-02-07, 02:10 PM
Join Date: Mar 2006
Posts: 2,579
Yes it sounds like the signal level is too low coming out of th HTPC assuming that your receiver is passing through properly. Likely the projector is detecting the signal presence, but the level is too low to generate an image. Using a passive splitter will also generate signal reflections. This might explain why you are then getting signal through to the projector when you unplug the cable leading to the plasma at the splitter, as the reflected signal path is significantly shorter.

There are powered distribution amplifiers/splitters available and some have adjustable gain.
99gecko is offline  
post #3 of 5 (permalink) Old 2008-02-07, 09:03 PM
Join Date: Jan 2003
Posts: 6,296
Due to cost, you might be better off with a switch. Some people use composite video switches but I would be tempted to look for one that handles a remote control. Component video is kind of like cable TV. It needs to be 75 ohm (impedance matched) and improper slitting or the wrong type of cable can cause problems. (Though a CATV splitter cannot be used due to different frequencies.)

Another option might be to use DVI/HDMI for the plasma so that the component does not need to be split.
I_Want_My_HDTV is offline  
post #4 of 5 (permalink) Old 2008-02-08, 12:49 AM Thread Starter
Join Date: Oct 2005
Location: Alberta, Canada
Posts: 23
Thank you for the replies. I don't have DVI or HDMI out on my HTPC so I'm going to have to split the component. I appreciate the info and the education into my problem.

htimst is offline  
post #5 of 5 (permalink) Old 2008-02-08, 05:46 PM
Join Date: Jan 2003
Posts: 6,296

Updating the video card in the HTPC could be cheaper than buying a component video splitter.
I_Want_My_HDTV is offline  

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