Yousefjuma Posted February 13, 2016 Report Share Posted February 13, 2016 Hello everyone, I hope you all are doing fine. We have faced a problem during a project previously that we couldn't figure out the solution for, and that's what are seeking now. We had a simple setup of 2 stacked projectors connected to display PC that is controlled by production PC. The connection between the projectors and display PC is fiber optic, subsequently, we were using DVI-Fiber optic converters at the projector and production PC ends. The projectors should be receiving signal of 1400x1050 60Hz. But for some reason, Windows is just offering the option of 1400x1050 24Hz only when we are connecting both projectors simultaneously. Which, of course, isn't supported by the projectors. However, when there is ONLY ONE of those projectors connected at a time to the same display PC with no changes in connections or whatsoever, Windows gives options of 1400x1050 60/75Hz. P.S. We had imported EDID info from projectors to the DVI-Fiber Optic transmitter/sender. Systems specifications: -Projectors: Christie Roadster S+ 20K -Graphics card of Display PC: we tried on two different Display PCs one with ATI FirePro V8800 and the other with Nvidia GeForce GTX 780 -DVI-Fiber Optic converter: Gafen DVI FM 500 We would really appreciate your suggestions on how to solve the issue. Thanks in advance. 0 Quote Link to comment Share on other sites More sharing options...
Ohj Limin Posted November 26, 2018 Report Share Posted November 26, 2018 I had this problem from the last event i had here in Saudi. I hope somebody from dataton can give us answer for this issue. 0 Quote Link to comment Share on other sites More sharing options...
Dataton Partner RBeddig Posted November 28, 2018 Dataton Partner Report Share Posted November 28, 2018 It looks like an EDID problem to me. It is not advisable to copy the EDID from the display to the EDID manager directly since this will copy all resolutions and frequencies at the same time. The graphic card discusses the optimal resolution with the display and if all frequencies are available, they will agree on what they decide is best. Our approach is to use an EDID manager which can be set to a fixed resolution/frequency through dip switches, a dial selector or software. Then the graphic will only see the resolution/frequency we want to use and will switch to that. 0 Quote Link to comment Share on other sites More sharing options...
Ohj Limin Posted November 28, 2018 Report Share Posted November 28, 2018 Our practice here is that we are using an Extron DVI Connector. Just like in our last event,. we used HD20K Projectors (4pcs). We copied the EDID resolution of the HD20K Projector by plugging in the Extron DVI connector (To Computer) to the DVI IN of the projector. We are always doing this. and then we encountered for the first time this weird problem about Hz. Thank you Sir RBeddig. 0 Quote Link to comment Share on other sites More sharing options...
Playground Posted November 29, 2018 Report Share Posted November 29, 2018 Our Process At FMAV uses a Lightware DVI router between the display machines and the cabling to the projectors. This allows us to program a good EDID regardless of what may happen in either cable or at the projector end. 0 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.