+ Post New Thread
Page 2 of 2 FirstFirst 12
Results 16 to 26 of 26
AV and Multimedia Related Thread, How to get rid of VGA ghosting problem in Technical; Originally Posted by Marc-Engineer It is down to the quality of the cable good leads are screened and then also ...
  1. #16

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by Marc-Engineer View Post
    It is down to the quality of the cable good leads are screened and then also the individual video and sync wires are screened again you would have no problem with a lead like this for up to 50 Mtrs make sure your lead had the wrap around ferrite core at each end within one inch of the VGA plug.

    Marc
    Projector Engineer
    ok thanks marc,i'll look for one with a ferrite core.

  2. #17

    Join Date
    Dec 2007
    Location
    Grimsby Lincs
    Posts
    314
    Thank Post
    0
    Thanked 53 Times in 38 Posts
    Rep Power
    38
    The diameter of the cable must be at least as think as your little finger 15mm NOT thinner.

    Marc
    Projector Engineer

  3. #18

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by Marc-Engineer View Post
    The diameter of the cable must be at least as think as your little finger 15mm NOT thinner.

    Marc
    Projector Engineer
    wow that seems to be three times thicker than the one i currently have which looks like this

    http://rmcomputers.net/images/Vga%20...ga%20Cable.jpg

  4. #19

    Join Date
    Dec 2007
    Location
    Grimsby Lincs
    Posts
    314
    Thank Post
    0
    Thanked 53 Times in 38 Posts
    Rep Power
    38
    Ahhh yes that is a very cheap VGA lead you definatly dont want to be using a cable like that for any run over 2 mtrs.

    Marc
    Projector Engineer

  5. #20

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by Marc-Engineer View Post
    Ahhh yes that is a very cheap VGA lead you definatly dont want to be using a cable like that for any run over 2 mtrs.

    Marc
    Projector Engineer
    im getting a little bit of ghosting with that even at 1.2m,i guess i'll buy a thicker one...

  6. #21

    Join Date
    Dec 2007
    Location
    Grimsby Lincs
    Posts
    314
    Thank Post
    0
    Thanked 53 Times in 38 Posts
    Rep Power
    38
    You could first try a couple of the clip on Ferrite chokes one on each end the ghosting can be from mains cable as well if you move the cable about does it vary? Thats what the screening protects you against its magnetic reflections causing your problems the screening (and chokes) stop it getting in to the wires carrying the signal, it can be from many things even a faulty VGA cable have you tried another?

    Marc
    Projector Engineer

  7. #22

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by Marc-Engineer View Post
    You could first try a couple of the clip on Ferrite chokes one on each end the ghosting can be from mains cable as well if you move the cable about does it vary? Thats what the screening protects you against its magnetic reflections causing your problems the screening (and chokes) stop it getting in to the wires carrying the signal, it can be from many things even a faulty VGA cable have you tried another?

    Marc
    Projector Engineer
    well as u can see from the image,my vga cable already has one ferrite choke on each end,r u suggesting to put more on them?and yeah when i move the end of the cable connected to the tv,the image does vary,i have to adjust it to minimum ghosting always.

    Nope,not tried another one yet...

  8. #23

    Join Date
    Dec 2007
    Location
    Grimsby Lincs
    Posts
    314
    Thank Post
    0
    Thanked 53 Times in 38 Posts
    Rep Power
    38
    So if moving it varies it then either the wires are lose in the cable or maybe your near something radiating RF or magnetic.

    Sounds like a duff (faulty) lead.

    Marc
    Projector Engineer

  9. Thanks to Marc-Engineer from:

    downloaderfan (6th October 2012)

  10. #24
    chazzy2501's Avatar
    Join Date
    Jan 2008
    Location
    South West
    Posts
    1,781
    Thank Post
    213
    Thanked 263 Times in 213 Posts
    Rep Power
    67
    I agree that you have a bad sheild or cruddy VGA cable. Why do you want to hook your laptop up to the tv? if it's only movies and surfin the web (not video games) then you could purchase a usb video card that would have a digital output and a usb extension lead.

    No ghosting

    about 30 for a usb video card.

    EDIT: ohh and never use a VGA splitter powered or otherwise they ruin the picture quality. Also the VGA signal is effected by resolution and refresh rate, so lower them to see if it helps.
    Last edited by chazzy2501; 3rd October 2012 at 03:20 PM.

  11. Thanks to chazzy2501 from:

    downloaderfan (6th October 2012)

  12. #25

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by Marc-Engineer View Post
    So if moving it varies it then either the wires are lose in the cable or maybe your near something radiating RF or magnetic.

    Sounds like a duff (faulty) lead.

    Marc
    Projector Engineer
    well sure did manage to keep my dongle away while using the vga cable...sure seems like a faulty lead....

  13. #26

    Join Date
    Sep 2012
    Posts
    24
    Thank Post
    14
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by chazzy2501 View Post
    I agree that you have a bad sheild or cruddy VGA cable. Why do you want to hook your laptop up to the tv? if it's only movies and surfin the web (not video games) then you could purchase a usb video card that would have a digital output and a usb extension lead.

    No ghosting

    about 30 for a usb video card.

    EDIT: ohh and never use a VGA splitter powered or otherwise they ruin the picture quality. Also the VGA signal is effected by resolution and refresh rate, so lower them to see if it helps.
    u mean a usb video card with a dvi or hdmi output and not vga output?
    this and vga to hdmi converter and all...dont they all provide the same output?

    well i heard vga splitters amplify the vga signals...how could they ruin it?

    reducing the resolution is sure an option but then picture looks like s*** if i reduce it lower than 1080p...
    Last edited by downloaderfan; 4th October 2012 at 05:22 AM.

SHARE:
+ Post New Thread
Page 2 of 2 FirstFirst 12

Similar Threads

  1. Replies: 0
    Last Post: 2nd November 2010, 03:52 PM
  2. Last day to get rid of your old 20's....
    By tech_guy in forum General Chat
    Replies: 16
    Last Post: 30th June 2010, 02:13 PM
  3. how to get rid of this man
    By callumtuckey in forum General Chat
    Replies: 22
    Last Post: 12th June 2007, 07:56 AM
  4. Replies: 19
    Last Post: 27th May 2007, 06:03 PM
  5. Replies: 5
    Last Post: 9th July 2006, 03:42 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •