120Hz over HDMI 15m

[colintve]

HelpPlease. I have a PC with NVIDIA GT650 card which can run 720 at 120HZ. I have a BENQ w703D which does 3D but needs to run at 120Hz. When 3D is not selected all works ok, when a movie is played and 3D is turned on I get OUT OF RANGE. When using a 3m HDMI cable it works. When using a 15m cable with booster in the middle I get the Out of Range. What is the best way to get this signal over this distance (amp/pc to projector) or must I move the PC and send the audio back, which is less difficult? Prefer not to move the PC. Thanx

 

[mauller07]

is the booster before the 15m cable? it could be that the 15m cable is just not of good enough quality to send the signal if on a 3m cable the picture is fine.

you could try wrapping the 15m cable in some tin foil to help with any EMI to see if it helps.

 

[Someone Somewhere]

I'd guess the booster doesn't support the high bandwidth rates needed. What happens if you try without it?

 

[colintve]

The booster is integral to the cable and is in the middle of the cable. It cant be removed, its like a bulge in the cable. I understand it must be the 15m cable that is preventing the 120Hz, as the 3m cable does work, so what I really want to know is how I can get the signal from the amp to the projector. Is there a specific way of knowing the cable will support it? Anyone have any experience with this issue? Thanks for the replies.

 

[mauller07]

does the 15M cable say it supports hdmi 1.4?

like this one http/www.amazon.co.uk/LCS-technology-Performance-including-connectors/dp/B006DY6VHS

if it does not then it probably was not made to have the bandwidth to support duel 1080p signals for 3D.

 

[colintve]

No it didn't say that s I bought that cable some time ago. I will buy the one from Amazon and see if that works then. The projector is only 1.3 by the way, yet runs 3D over it. So I understand you don't need 1.4 for 3D.

 

[mauller07]

for a long cable i would especially get a new 1.4 spec cable for a long run if you want to use 3D.