Video display DDC information, DDC indications

Video display (DDC) information

The Display Data Channel (or DDC) is an industry standard scheme which allows video monitors to declare their capabilities to the computer’s video adapter circuitry, allowing the latter to optimise their outputs accordingly. Since the widespread adoption of the scheme, video adapters have become increasingly dependent on receiving relevant DDC information during startup, before they will output anything more than a rudimentary video signal.

DDC indications

When power is first applied to the local module (either from the computer’s USB port or an optional power adapter) it will search for valid DDC data on its video out connector. During this process, the yellow indicator (built into the link connector) will flash to indicate its progress:

OTE	LINK

It is not possible to transmit DDC data back from the video monitor that is attached to the remote module to the computer’s video adapter. Therefore, during startup of the local module, it will search for a video monitor connected to its local feed-through connector:

•If a local video monitor is found, its DDC information will be compared to the information already stored and, if different, will be copied, stored and presented to the video adapter upon request.

•If no local video monitor is found, the local module will make available its previously stored set of DDC parameters to the video adapter upon request; or, if none were stored, a default set.

In either case, the DDC information taken by the video adapter will be used to determine the video output that is sent via the SRX modules to the remote monitor.

If you find that the default DDC information is not completely suitable for your remote monitor, try temporarily connecting your remote monitor to the video out port of the local module. When the local module is powered up, it will read and store the DDC information from your monitor. You can then return the monitor to its remote position and the new DDC information will be used at every power on.

•If no valid DDC information is located, the yellow indicator will give one very short flash, representing an attempt to

read data. No changes will be made to the information already stored within the local module.

•If the DDC information is the same as that already stored, no change will be made and the yellow indicator will give one single flash as the information is checked and normal operation resumes.

•If different DDC information is located, the yellow indicator will flash rapidly for 2 to 3 seconds while the new information is stored. A single flash will then be given as the information is checked and normal operation resumes.

The local module’s yellow indicator also provides fault indications to assist with troubleshooting:

•Two flashes - Checksum error prior to copying - no information will be programmed.

•Three flashes - Too much data to fit into the module - the module can hold a maximum of two pages of DDC information.

•Rapid flashing followed by four flashes - data was lost during copying - the default data was substituted. Repeat the power on process.

•Rapid flashing followed by five flashes - Checksum error during copying - the default data was substituted. Repeat the power on process.

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SRX, ServSwitch specifications

The Black Box SRX ServSwitch is an innovative KVM (Keyboard, Video, Mouse) switch that offers robust solutions for managing multiple computers from a single workstation. This device stands out in environments ranging from data centers to broadcasting studios, where efficient control over multiple systems is crucial.

One of the key features of the SRX ServSwitch is its high-resolution video support. It can handle video resolutions up to 4K at 60Hz, ensuring that users can enjoy sharp and clear visuals without lag. This level of performance is essential for professionals who rely on precise graphics for tasks such as video editing and design work.

The SRX ServSwitch employs advanced USB technology, allowing for seamless connectivity with various peripherals. It supports USB 2.0 devices, which means users can connect printers, external drives, and other devices without worrying about compatibility issues. Additionally, the switch allows for USB device sharing, enabling multiple computers to access the same peripherals efficiently.

Security is a significant concern in today’s IT environments, and the Black Box SRX ServSwitch addresses this through its advanced security features. It includes support for secure booting and end-to-end encryption, ensuring that data remains protected when switching between systems. This makes it suitable for environments that handle sensitive information, such as financial institutions or healthcare facilities.

The design of the SRX ServSwitch is another standout characteristic. With its easy-to-use interface, users can quickly switch between connected systems using hotkey commands or the push-button interface. This usability improves productivity since users can manage multiple systems without the hassle of different keyboards and mice.

Furthermore, the SRX ServSwitch is built to be scalable, allowing for the addition of more channels as needed. This flexibility means that organizations can adapt their KVM switch setup as their operational needs grow. It supports both local and remote management, offering organizations the ability to control systems from various locations seamlessly.

The build quality of the Black Box SRX ServSwitch is robust, designed to handle the rigors of continuous use in demanding environments. It is compatible with various operating systems, ensuring that users can integrate it into their existing setups without significant reconfiguration.

In summary, the Black Box SRX ServSwitch offers a comprehensive solution for KVM management, characterized by high-resolution video support, USB compatibility, security features, easy usability, scalability, and durability. It is a valuable investment for organizations seeking an efficient way to manage multiple systems centrally.