Originally Posted by doodoo729
Hi, I have a problem trying to get my xbox 360 to work on my projector (panasonic ae700). The xbox worked great on my plasma tv (720p) but when I connect it to the projector via HDMI, I get no signal at all. When I routed through a receiver, I can actually hear the sound but no image. I thought it's the receiver's problem at first, so I tried to connect the xbox directly to the projector. Still no image. Does the length of the HDMI cable make any difference? I apologize if this has been answered before. I couldn't go through all the pages in the thread. Thanks for your help.
Although no maximum length for an HDMI cable is specified, signal attenuation (dependent on the cable's construction quality and conducting materials) limits usable lengths in practice. HDMI 1.3 defines two cable categories: Category 1-certified cables, which have been tested at 74.5 MHz (which would include resolutions such as 720p60 and 1080i60), and Category 2-certified cables, which have been tested at 340 MHz (which would include resolutions such as 1080p60 and 2160p30). Category 1 HDMI cables are marketed as "Standard" and Category 2 HDMI cables as "High Speed". This labeling guideline for HDMI cables went into effect on October 17, 2008. Category 1 and 2 cables can either meet the required parameter specifications for interpair skew, far-end crosstalk, attenuation and differential impedance, or they can meet the required nonequalized/equalized eye diagram requirements. A cable of about 5 meters (16 ft) can be manufactured to Category 1 specifications easily and inexpensively by using 28 AWG (0.081 mm²) conductors. With better quality construction and materials, including 24 AWG (0.205 mm²) conductors, an HDMI cable can reach lengths of up to 15 meters (49 ft). Many HDMI cables under 5 meters of length that were made before the HDMI 1.3 specification can work as Category 2 cables, but only Category 2-tested cables are guaranteed to work.http://en.wikipedia.org/wiki/HDMI
In practical terms, today, for distances 50 feet and shorter, even economical HDMI cables are usually reliable at 720p, 1080i and (though this is less consistently so) 1080p. For very short runs--all those 3 and 6 foot cables out there in the world, at least when not being used as part of a much longer signal chain--it's best not to worry about it at all. But for those long runs, the future is still very unclear. Low-cost 50-foot cables which are near their performance limit at 1080p today may not work with 16-bit color 1080p tomorrow.
If you're in the longer-than-50-foot category, it gets dicier. We have had good consistent results with the Series-1 cable out to 100 feet, with reports of no trouble in the great majority of installations. Cable quality starts to be a real concern at these distances, and performance always is hard to predict, especially because the cable that works on one source/display pair may not work on another. There is, unfortunately, no really good way to know what will work without plugging it in.http://www.bluejeanscable.com/articl...n-hdmi-run.htm