Knowledge

When the fiber core is tight, it is common practice to multiplex video, two-way audio, control data and dispatch calls onto a single link. This article explains the points to note about model combinations, boundary conditions, and maintenance isolation.

Optical fiber propagation only takes up microseconds. What really eats up the delay is encoding, decoding and scaling. This article breaks down the components of end-to-end delay and provides ideas for selecting non-compressed links and actual measurement methods.

The command screen and dispatching seats are most afraid of single-point disconnection. This article sorts out the design key points of active and standby fiber cores, different physical directions, single fiber pairing and spare parts ratio, and gives the judgment criteria for handover drills.

Deducing the optical terminal channel from the matrix outlet: This article provides the grouping method of camera position, return, monitoring, and control data, as well as the choice of one-way and two-way, compression or not, to help the integrator balance the channel account at once.

The optical transceiver does not light up and the screen flickers when it is powered on, mostly due to details at the construction site. From jumper selection, transceiver polarity check to three-step testing method, this article lists common pitfalls in audio and video optical fiber projects and corresponding avoidance actions.

The same is true for transmitting high-definition images. Using SDI in the studio and HDMI in the conference room is not a matter of habit. This article explains the differences between the two in optical transmission selection from three aspects: interface genes, speed and embedded audio, and usage scenarios.

How to set up internal calls via optical fiber? This article summarizes the three combination methods of built-in video, independent call link, and centralized program audio return, explains the key points of balanced interface and popping suppression, and helps you choose the appropriate optical transceiver form.

If the splicing screen picture is misaligned or the sound picture does not match up, do not adjust the monitor first. This article gives a hierarchical positioning method to explain the impact of optical transceiver batches, kilometer range mixing and power-on sequence on synchronization, as well as the correct combination of multi-channel HDMI optical transmission.

If the screen is black when transmitting across buildings, it is probably because the distance and link budget are not enough. Three-step method: measure the actual bypass length instead of the straight-line distance, calculate the attenuation in dB and leave a margin, and then determine the optical transceiver transmission specifications and optical cable protection based on this.

Compressed transmission saves wires, but does not save latency and image quality loss. This article explains the differences between uncompressed and compressed in terms of delay, chroma sampling, and synchronization, and helps you determine when it is necessary to use HDMI, DVI, and SDI uncompressed optical transceivers.