Panasonic TCP60GT30 display issues; HD over Cat5, Blu-Ray picture grainy - AVS Forum
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post #1 of 3 Old 04-07-2012, 09:21 AM - Thread Starter
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I purchased a 60" GT30 Plasma for my basement. I am running a cable box and a Blu-Ray into an Onkyo receiver and the single HDMI out goes into an HDMI wall plate that converts the signal to CAT5 cable. Those CAT5 cables run roughly 50' to the TV, which there is another HDMI wall plate that converts the signal from CAT5 back to HDMI, which then goes into the Panasonic HDMI 1 input. Cable box HD picture looks great. But the BluRay video is very grainy or snowy. I've tested each part of this setup individually (BluRay into Panasonic HDMI 1 input; Cable Box into HDMI 1 input; etc) and each looks good. I've even put a 22" Samsung TV on the other end of BluRay-HDMI wall Plate-CAT5-HDMI wall Plate- setup and the BluRay video looks great as it should. Could this be an issue with the Panasonic or some other part of this setup?
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post #2 of 3 Old 04-08-2012, 07:42 AM
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Quote:
Originally Posted by Hammy1480 View Post

I purchased a 60" GT30 Plasma for my basement. I am running a cable box and a Blu-Ray into an Onkyo receiver and the single HDMI out goes into an HDMI wall plate that converts the signal to CAT5 cable. Those CAT5 cables run roughly 50' to the TV, which there is another HDMI wall plate that converts the signal from CAT5 back to HDMI, which then goes into the Panasonic HDMI 1 input. Cable box HD picture looks great. But the BluRay video is very grainy or snowy. I've tested each part of this setup individually (BluRay into Panasonic HDMI 1 input; Cable Box into HDMI 1 input; etc) and each looks good. I've even put a 22" Samsung TV on the other end of BluRay-HDMI wall Plate-CAT5-HDMI wall Plate- setup and the BluRay video looks great as it should. Could this be an issue with the Panasonic or some other part of this setup?


Your big screen Panny probably requires more signal. Any picture artifacts would be much more noticeable as well. I would suspect the problem may be with the wall plate converters. From PC Mag.com:
Quote:


There are cases where higher quality cables and going to lengths to maintain signal quality are important. They just aren't cases that apply for most HDTV owners. If you're going to run an HDMI cable for lengths longer than 10 feet, you should be concerned about insulation to protect against signal degradation. It's not an issue for 6-foot lengths of cable, but as the distance between media device and display increases, signal quality decreases and the more susceptible the signal becomes to magnetic interference. In fact, for distances of over 30 feet, the HDMI licensing board recommends either using a signal amplifier, or considering an alternate solution, like an HDMI-over-Ethernet converter. When you're running up against the maximum length, the greater insulation and build quality of more expensive cables can potentially improve the stability of your signal. However, if there's a 30-foot gap between your Blu-ray player and your HDTV, you might want to rearrange some furniture. Or just use a technology designed for long distances.


Ian

The best way to succeed in life is to act on the advice you give to others

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post #3 of 3 Old 04-08-2012, 08:45 AM
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sounds like either a connection problem at wall plate or an issue with the cat5. I prewired homes for audio/video for 6 years and made the mistake of using cat5 for hdmi twice. Also remember that your cable box is broadcasting in 1080i/720p and you BD player is at 1080p.

To narrow it down try running an hdmi cable as a jumper from your bd player to your tv on hdmi 2 if pik is clear as it should be your issue lies in the cat5 cable

It's all fun and games until my wife notices something new in the entertainment center
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