Sign In:     

Forum: General Discussion

Topic: NEED HELP QUICK! - Page: 1

This part of topic is old and might contain outdated or incorrect information

I have a show tonight and I am mixing videos live for the first time. I have had no problems connecting my laptop to my sony lcd through hdmi at home or anywhere else. The owner of the club bought a 100 ft. hdmi cable to run to his projector (Texas Instruments DLP) after hooking up it is not recieving the source, and won't display. I have extende the display settings, hit function f4, my laptop screen keeps flickering like its trying but no luck! Any suggestions?????
 
Posted Fri 30 Oct 09 @ 12:46 pm
Try starting up the laptop with the tv connected to it. See what happens.
 
Thanks for the reply! I attempted that to no avail! This is driving me crazy... is there a difference in connecting to a projector than an Lcd TV? Like I said I have never had a prob before but never connected to a projector!!!
 
Are you trying to do this with VDJ?
 
thats because hdmi looses signal after 20 feet its impossible to drive a digital signal that far without help

depending the mac you have you would be better off with a 100 foot vga cable. hdmi is great for home not so go on the road.
 
Yes I am using VDJ on an HP Pavilion dv5-119nr Notebook. Why would they even make 100ft HDMI Cables then?
 
This wont help for tonight. Sorry. But you can get HDMI repeater units and units which transmit HDMI over standard Ethernet cable which will extend the distance that you can send HDMI signals over.

At 100ft you may have to resort to RGB/VGA or COMPOSITE Video. That is a long, long way to send an HDMI signal.

Daz
 
They make them because people don't do research anymore before they buy things. If you read the specs for hdmi the max is 50 feet if you are using very heavy gauge cables. Most cables that long should have some sort of compensation built into them apparently this one does not or your computer is not able to talk to it correctly. In either case you need to look at some sort of booster or a total change of cable as suggested before vga is your best bet for a run this long.
 
that is not true it's not 50ft! there are some good HDMI cable you can take you a 100ft he can use this box to go a 100ft and more buy this box HDMI 1.3a/Cat 2 over Cat5E/RJ45 Extender Kit to 196ft
 
To be fair.

All the comments made are true to some extent. The specification for HDMI does not include a max length for relyable signal transmission. It is however generaly accepted that lengths over 15mtrs with no repeater or compensation and using standard copper cable will not provide a recieved signal which still complies with the HDMI spec. It dosen't say it wont work at all , just that it will not comply to the spec.

The distance over which HDMI signals can be transmitted (relyably) is affected by numerous factors. There are some solutions to this and all work to some extent. Active cables, Cat5/6 convertors and fiber optic links are just a few. Some TVs and projectors have HDMI reciever chips which provide active cable EQ and this can produce benefits at longer distances as well.

No one spec or report states that it wont work. They will just say that the transmitted signal falls out of spec. Wether you get a usable picture or not is realy down to trial and error as there are so many variables here. My feeling is that you will have great difficulty transmitting an HDMI signal over a 100mtr distance without using some form of repeater or convertor and that how well this works depends on the quality of the cable, the type of TV/Projector, the type of repeater/convertor used, what resolution is being sent and how much external noise the system has to put up with.

Daz
 
Daz don't sweat it its just drive by Phil. I've been doing this av thing for over 20 years if we talking about hdmi 1.3 spec however we just got 1.4 in May which increases the bandwidth from 165 mhz to 340 mhz adds some cool things like Ethernet connectivity and a modest res bump to 2k x 4k.
but rather then argue on who is right and who is wrong lets actually give the orginal poster something he can use to fix his problem.

something like this would work





as stated before and this time i'm going to put it in caps

VGA IS YOUR BEST BET FOR RUNS OVER 50 FEET

unless you like spending 100's on silly adapters like the one pictured above.
 
Cyder

Absolutely...... Sorry got carried away in specs. TeHe.

BTW can you still get VGA to HDMI converter plugs? Maybe he could still use the cable but with adapters at each end. At least he would get some use out of it. I assume it was not cheap.

Ps sorry to keep quoting Mtrs instead of feet. Us Brits went metric some time ago. so i'm told. Still can't get it right. LOL

Daz
 
Sure he could get something like this



but it will still be cheaper by far just to buy the 100 foot vga
 
Got ya

But not quite what I ment. I have a DVI cable somewhere that came with a pair of addaptor plugs that you could fit on to each end of the cable and use it for VGA or DVI. I wondered if these were available for HDMI cables as well.

Just an idea.

Daz
 
I have S-Video+Audio Baluns that use Ethernet as the middle between the Baluns. You then make or get a 100\' Ethernet cable. I have used it over 250\' with no problem but it says it can go up to 1000\'. Works great even though it is standard def but it is better than nothing.

You can get two for under $100

http://www.svideo.com/500038.html
 
 
Guys, I have been into Home theater for 12+ years and was trained by and worked for Tweeter. Do longer cables work? Yes, sometimes they do. I depends on how nice the cable is (shielding, loss, connectors) and how well the circut that sends the signal (source) and how sensitive the display device is (TV, Projector). I have been tought since HDMI came out that you may get lucky (which some of you seem to be here) but an amplifier is required for every install longer than 7 meters (21 feet). This is not a maketting ploy to screw people, engeniers who design this stuff and know way more than you and I will ever know about HDMI have proved it, I have seen the O scope signals. It is just good buisness practice to build and install a reliable system, your buisness depends on it. The signal booster / amplifier is the best solution at this point.

If you look at cat 5 cable (for PC networking) IEEE spec for cable loss is 21.5 db of signal. That in theory happens at 100 meters (328 feet). I have seen 450' runs work fine, and I have seen them also fail until you cut 10 feet off (still 440'). There is no black and white answer here. It may work and it may not.

In the OP's case, I have never seen a 100' HDMI cable and that is almost 5 times longer than the recomended limit. Whoever sold you that cable should have said something, but they did not. You need a signal booster or a change in your system (to get that length shorter).
 
I run a 50ft HDMI / DVI cable then a DVI to VGA converter (DVI powered). Then 50ft vga cable to projector and it runs great! 100ft total.



 
its still converting the signal to analog at the source this is no differnt then using vga the whole run.
 
what is the differance between virtual dj pro and virtual vinyl
 
83%