When the large screen in the command center is spliced ​​and some images appear to be half-slow and the images on both sides of the splicing seam are misaligned, the engineering team often first suspects the screen. In fact, 80% of the problem lies in the signal link. The troubleshooting idea is: first perform hierarchical positioning, and then align the links.

Step 1: Distinguish between processing out-of-sync and transmission out-of-sync

At the matrix end, switch all screens to the same signal source: if they are consistent instantly, it means there is no problem with the screen and the link. The difference comes from the processing delay of each output channel of the pre-processor, so adjust the splicer; if it is still inconsistent, check the transmission link further. This step can save a lot of unnecessary attempts to change devices.

Step 2: Align the links to the same baseline

The point-to-point transmission delays of the same model of optical transceivers are generally fixed and consistent. Out-of-synchronization usually occurs in three places: mixed use of different batches or different solution models, mixed insertion of optical modules with different kilometer specifications, and two extra patch panels for individual links in the same batch of screens. The rectification method is to unify the model and batch, unify the specification file, and record the number of jumpers for each channel in the completion sheet.

• For multi-channel signals from the same source, try to use one multi-channel device instead of multiple stand-alone devices.
• Strict pairing numbers are used at the transceiver and receiver to avoid the delay difference from being amplified after mixing lines.
• When adding a new point and moving the link, it is better to go around and keep the number of hops consistent.

Step 3: Power-on sequence and control channels

It is recommended to open the signal source and transmitter first, and then open the display end, so that the splicer can allocate images after stabilizing the EDID handshake.4-way two-way HDMI+network+4-way independent two-way audio optical transceiverThis type of equipment transparently transmits the network channel along with the optical fiber. The cascade control of the distributed splicing system does not need to run additional network cables, and there is one less source of desynchronization.

By following these three steps, most splicing synchronization problems can be located in specific links. If you need to review the plan, please contact EB-LINK technical support 0755-83179002.