how long can VGA cable be run? - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #1 of 20 Old 12-07-06, 04:46 AM Thread Starter
drf
drf
 
Join Date: Oct 2006
Location: Somewhere else.
Posts: 1,249
how long can VGA cable be run?

One of my clients has asked me to install a projector and screen when I upgrade and tune their P.A setup. I can find out about projection distance, angle and keystone correction however i am a bit unsure of the maximum distance I can run a vga cable before we start to loose image quality. The projector will get its signal from a HP laptop. Currently we need to run the cables 25 metres.

Thanks,

dr f
drf is offline  
Sponsored Links
Advertisement
 
post #2 of 20 Old 12-07-06, 08:32 AM
Elite Shackster
Bob
 
Join Date: Apr 2006
Location: Shueyville, Iowa
Posts: 999
Send a message via AIM to bobgpsr
Re: how long can VGA cable be run?

I've heard that about 10 metres is the longest you should try to run VGA without using booster amps.

Bob
bobgpsr is offline  
post #3 of 20 Old 12-07-06, 10:58 AM
Senior Shackster
 
basementjack's Avatar
jack
 
Join Date: Sep 2006
Location: Chicago Suburbs, IL USA
Posts: 369
Re: how long can VGA cable be run?

I've run 50 feet with no problem at all, as in no even a hint of a signal problem. It really surprised me.

My advice would be to use a single run of cable with the only connections being at the laptop and at the projector.

Ensure the cable you use is constructed of 3 co-ax cables internally - straight unshielded wire will not cut it.

PIMFG.com sells a 100 foot Male-male cable with one RF choke $34, (75 foot is $27)http://www.pimfg.com/product_list.as...earchstring=68
These are the cables I've used with good luck.

Be sure to put the RF choke on the end near the laptop - as the choke's purpose is to reduce RF noise, which is more likely to enter at the laptop than it is at the projector.

Hope this helps.
basementjack is offline  
post #4 of 20 Old 12-07-06, 01:04 PM
Elite Shackster
brucek
 
Join Date: Apr 2006
Posts: 7,514
Re: how long can VGA cable be run?

Quote:
Be sure to put the RF choke on the end near the laptop - as the choke's purpose is to reduce RF noise, which is more likely to enter at the laptop than it is at the projector.
Huh, I would have thought that it would be best to install a choke closest to the equipment you want protected from the interference, since at that location any RF produced at the transmitting end combined with any interference picked up along the cable would be choked.

I would think that you could run ~100 feet with a high quality HD-15 cable.

brucek
brucek is offline  
post #5 of 20 Old 12-07-06, 03:33 PM
elmac
Inactive
 
Posts: n/a
Re: how long can VGA cable be run?

VGA-Analogue is not going to have as long a range as DVI. Using high quality cables I would say that 10 meters would be the maximum for 1024x768@60Hz. There are VGA-Analogue repeater solutions as well that can also permit 10's and 100's of meters of signal--at lower resolution let say 800x600@60Hz
Try good cable, and if that doesn't work you will have to install repeater.
post #6 of 20 Old 12-07-06, 08:30 PM
Senior Shackster
Platinum Supporter
 
Rodny Alvarez's Avatar
Rodny
 
Join Date: Apr 2006
Location: Millbrook AL
Posts: 826
Re: how long can VGA cable be run?

I have a 24 ft cable from my Dell comp to my pj and have no problems! http://lindy.com/


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Rodny Alvarez is offline  
post #7 of 20 Old 12-08-06, 03:57 AM Thread Starter
drf
drf
 
Join Date: Oct 2006
Location: Somewhere else.
Posts: 1,249
Re: how long can VGA cable be run?

Thanks guys, I found a local supplier of cable and will try the longest run they sell (15metres I think) then add 5 metres at atime until the signal degrades too much to use. It looks like lindy has an australian arm, and supply boosters so I know I can get one if necessary. At least I can go to my client with some knowledge on this, were as before I would have to say I didn't know.
drf is offline  
post #8 of 20 Old 12-09-06, 05:13 AM
Senior Shackster
Dan
 
Join Date: May 2006
Location: Australia
Posts: 292
Send a message via MSN to Danny
Re: how long can VGA cable be run?

I personally wouldn't run the cable more than 10metres without the booster, even if it works with the HP notebook you must consider what would happen if they hooked up another notebook that had a weaker signal. Just a thought.
Danny is offline  
post #9 of 20 Old 12-09-06, 05:32 AM Thread Starter
drf
drf
 
Join Date: Oct 2006
Location: Somewhere else.
Posts: 1,249
Re: how long can VGA cable be run?

Thats a good point, I don't know what the chances of that are, but i will certainly keep that in mind when sorting out the final plan of installation.
drf is offline  
post #10 of 20 Old 06-02-07, 09:19 AM
Shackster
 
phaseshift's Avatar
Gui Lao
 
Join Date: May 2007
Location: Shenzhen, China
Posts: 45
Re: how long can VGA cable be run?

While I can not give a definite answer, I can say that I have run into _big_ problems with this when we tried (ignorantly) to lengthen a VGA cable by adding on another F-M cable. Tried an amplifier and it was not much of an improvement, but wouldn't you know, a new cable the right length fixed it in an instant.

The run is about 60 feet and we added about 5 feet to that in order to move the PJ. The actual PJ is a Benq something or other. It is a mid level 720 resolution and even though it has HDMI, it is a conference room PJ and mostly sees use with spreadsheets, eDrawings and junk like that.

We certainly learned our lesson on the VGA cable deal. Painful, but a well learned lesson for sure. Based on my experience, I would certainly not recomend extending the cable if it is already there and you just need a little more; it sure messed us up.
phaseshift is offline  
Reply

Bookmarks

Tags
cable , long , run , vga

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome