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| Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Rob LaRose  Date: 03-05-2013, 19:25:PM |
Using my CG241W, everything's hunky-dory. But when I connect the CG245W, I see a slight yellow/blue offset (like misaligned R/G/B) on the screen. Direct-connect to the box works fine. Driving me batty. Somebody throw me a bone? --Rob |
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Jean-Francois Panisset Date: 03-05-2013, 19:50:PM |
No specific experience with the Gefen 1500HD, but we've got some Eizos CG245W running over Gefen DVI FM500 extenders without any problems. A few things I can think of: - The Gefen 1500 HD uses 4 fiber strands, are you 100% sure that your two fiber cables are the same length? Assuming 1920 x 1200 x 60Hz with 5% vertical retrace and 15% horizontal retrace, you are pretty much at the maximum 165 mpixels/sec rate for single link DVI. As a rule of thumb, a signal travels at 200,000 km/sec in optical fiber. So very roughly if you had a 200,000,000 meter long fiber down which you sent 165,000,000 pixels in 1 second (let's call that 200,000,000 pixels for simplicity), each pixel would be "separated" by 1m down your fiber. I've actually seen this myself in a case where the installer broke one of the fiber pairs, replaced it with a longer cable, and the R/G/B offset visible on the screen was equal to the length mismatch between the cables. In your case, if the fiber length difference is smaller, let's say 0.5m, it could be that the CG241W is more tolerant than the CG245W to a phase offset between the R,G and B signals on the DVI connector, assuming the Gefen 1500HD doesn't do reclocking on reception? I hope I didn't get my math wrong... - If this is in the context of a Flame system running at 24/23.98 fps, there is a magic setup you have to do on the CG245W monitor to enable correctly syncing at 48Hz, otherwise it will behave in pretty weird ways when you switch to at 24/23.98 fps project. This magic setup was documented in one of the versions of the Z800 installation guide, not sure if it is still in more recent versions, you may have to dig a bit. Hope this helps... JF On Tue, Mar 5, 2013 at 4:20 PM, Rob LaRose wrote: > > Anyone using the Gefen 1500HD w/ an Eizo CG245W? > > Using my CG241W, everything's hunky-dory. But when I connect the CG245W, I > see a slight yellow/blue offset (like misaligned R/G/B) on the screen. > Direct-connect to the box works fine. > > Driving me batty. Somebody throw me a bone? > > --Rob > > > > rob larose | engineer | rock paper scissors | 212-255-6446 | > www.rockpaperscissors.com > > > To unsubscribe from the list send a blank e-mail to > mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe To unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe |
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Rob LaRose Date: 03-05-2013, 21:30:PM |
Wow. I'll investigate my fiber cable lengths. Thanks for the tip! --Rob == This message was composed == entirely with my right thumb. == Please excuse typos. On Mar 5, 2013, at 7:49 PM, Jean-Francois Panisset wrote: > No specific experience with the Gefen 1500HD, but we've got some Eizos > CG245W running over Gefen DVI FM500 extenders without any problems. > > A few things I can think of: > > - The Gefen 1500 HD uses 4 fiber strands, are you 100% sure that your > two fiber cables are the same length? Assuming 1920 x 1200 x 60Hz with > 5% vertical retrace and 15% horizontal retrace, you are pretty much at > the maximum 165 mpixels/sec rate for single link DVI. As a rule of > thumb, a signal travels at 200,000 km/sec in optical fiber. So very > roughly if you had a 200,000,000 meter long fiber down which you sent > 165,000,000 pixels in 1 second (let's call that 200,000,000 pixels for > simplicity), each pixel would be "separated" by 1m down your fiber. > I've actually seen this myself in a case where the installer broke one > of the fiber pairs, replaced it with a longer cable, and the R/G/B > offset visible on the screen was equal to the length mismatch between > the cables. In your case, if the fiber length difference is smaller, > let's say 0.5m, it could be that the CG241W is more tolerant than the > CG245W to a phase offset between the R,G and B signals on the DVI > connector, assuming the Gefen 1500HD doesn't do reclocking on > reception? I hope I didn't get my math wrong... > > - If this is in the context of a Flame system running at 24/23.98 fps, > there is a magic setup you have to do on the CG245W monitor to enable > correctly syncing at 48Hz, otherwise it will behave in pretty weird > ways when you switch to at 24/23.98 fps project. This magic setup was > documented in one of the versions of the Z800 installation guide, not > sure if it is still in more recent versions, you may have to dig a > bit. > > Hope this helps... > JF > > > On Tue, Mar 5, 2013 at 4:20 PM, Rob LaRose > wrote: >> >> Anyone using the Gefen 1500HD w/ an Eizo CG245W? >> >> Using my CG241W, everything's hunky-dory. But when I connect the CG245W, I >> see a slight yellow/blue offset (like misaligned R/G/B) on the screen. >> Direct-connect to the box works fine. >> >> Driving me batty. Somebody throw me a bone? >> >> --Rob >> >> >> >> rob larose | engineer | rock paper scissors | 212-255-6446 | >> www.rockpaperscissors.com >> >> >> To unsubscribe from the list send a blank e-mail to >> mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe > To unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe To unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe |
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Richard Keats Date: 03-06-2013, 15:20:PM |
Hi Rob The doc with the Eizo settings can be found here: http://download.autodesk.com/us/systemdocs/pdf/creativefinishing_hp800_upgrade.pdf See page 9 for the instruction called "Configuring the EIZO CG245W Monitor" On 05/03/2013 9:25 PM, Rob LaRose wrote: Wow. I'll investigate my fiber cable lengths. Thanks for the tip! --Rob == This message was composed == entirely with my right thumb. == Please excuse typos. On Mar 5, 2013, at 7:49 PM, Jean-Francois Panisset <panisset@gmail.com> wrote:No specific experience with the Gefen 1500HD, but we've got some Eizos CG245W running over Gefen DVI FM500 extenders without any problems. A few things I can think of: - The Gefen 1500 HD uses 4 fiber strands, are you 100% sure that your two fiber cables are the same length? Assuming 1920 x 1200 x 60Hz with 5% vertical retrace and 15% horizontal retrace, you are pretty much at the maximum 165 mpixels/sec rate for single link DVI. As a rule of thumb, a signal travels at 200,000 km/sec in optical fiber. So very roughly if you had a 200,000,000 meter long fiber down which you sent 165,000,000 pixels in 1 second (let's call that 200,000,000 pixels for simplicity), each pixel would be "separated" by 1m down your fiber. I've actually seen this myself in a case where the installer broke one of the fiber pairs, replaced it with a longer cable, and the R/G/B offset visible on the screen was equal to the length mismatch between the cables. In your case, if the fiber length difference is smaller, let's say 0.5m, it could be that the CG241W is more tolerant than the CG245W to a phase offset between the R,G and B signals on the DVI connector, assuming the Gefen 1500HD doesn't do reclocking on reception? I hope I didn't get my math wrong... - If this is in the context of a Flame system running at 24/23.98 fps, there is a magic setup you have to do on the CG245W monitor to enable correctly syncing at 48Hz, otherwise it will behave in pretty weird ways when you switch to at 24/23.98 fps project. This magic setup was documented in one of the versions of the Z800 installation guide, not sure if it is still in more recent versions, you may have to dig a bit. Hope this helps... JF On Tue, Mar 5, 2013 at 4:20 PM, Rob LaRose <rlarose@rockpaperscissors.com> wrote:Anyone using the Gefen 1500HD w/ an Eizo CG245W? Using my CG241W, everything's hunky-dory. But when I connect the CG245W, I see a slight yellow/blue offset (like misaligned R/G/B) on the screen. Direct-connect to the box works fine. Driving me batty. Somebody throw me a bone? --Rob rob larose | engineer | rock paper scissors | 212-255-6446 | www.rockpaperscissors.com To unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribeTo unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribeTo unsubscribe from the list send a blank e-mail to mailto:studiosysadmins-discuss-request@studiosysadmins.com?subject=unsubscribe |
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Rob LaRose Date: 03-06-2013, 15:25:PM |
I'll take a look at those settings, but I see the color offset even before booting the OS -- it's there during POST & in the BIOS setup, so I suspect it's not due to the refresh in-app. And when directly-connected, I don't have any problem (at least in POST/BIOS) so it seems certain there's something happening in the extension? As soon as I can get time on the box, I'm gonna connect via known-same-length cables and see what happens. --Rob On Mar 6, 2013, at 3:17 PM, Richard Keats wrote:
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Richard Keats Date: 03-06-2013, 16:40:PM |
You may also want
to test tweaking your /etc/X11/xorg.conf: disable Screen 0 "Screen Lustre / EIZO CE24xW 6000 SDI 1920x1200" 0 0 (ie: what ever specific Autodesk config you're using) enable Screen 0 "Screen Default 1920x1200 EDID" 0 0 Hth, it sounds like you may have to upgrade the extender. On 06/03/2013 3:23 PM, Rob LaRose wrote:
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| Re: Eizo CG245W + Gefen 1500 extender | |||
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Posted by: Rob LaRose Date: 03-18-2013, 15:50:PM |
So it seems it was probably a length difference on that one cable run vs the others. I suppose the most noteworth takeaway is that the CG241W on this same troublesome fiber run had no issues at all, and the 245 did. I notified Eizo support of this truth, and they've promised to alert the product team. --Rob On Mar 5, 2013, at 7:20 PM, Rob LaRose wrote:
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