Installation and Operation, cont’d

Technical Points for Digital Video and Content Protection Encryption

•Digital Visual Interface (DVI) is a digital video format that was created by the computer industry in 1999.

•High Definition Multimedia Interface (HDMI™) is a multimedia format that was created by the consumer video industry in 2003.

The HDMI format is built onto the DVI format, adding digital audio and control while reducing the size of the connector.

The HDMI format is likely to replace the DVI format in the near future.

With passive adapters, the HDMI format is backward compatible with the DVI format.

•With Extron adapters and/or cables, the DVI 201 fully supports either format, regardless of the connector type on the video source and display. See appendix A, "Reference Information," for part numbers.

•High-bandwidth Digital Content Protection (HDCP) is an encryption method that protects copyrighted digital entertainment material that uses DVI video.

HDCP is generated by video player hardware, enabled by the video content.

The HDCP key is transmitted with the Display Data Channel (DDC).

The DDC signal line was designed for the DDC’s low data rate; the HDCP key rate is much higher.

♦Without active buffering, an HDCP key signal can travel only a short distance. The display may properly receive the digital video signal, but not the HDCP key. Without the key, the display cannot decrypt the video signal. Symptoms of undecrypted video may include a flashing black or blue screen or “snow”.

♦With active buffering, an HDCP key signal can travel as far as other signals to ensure proper decryption.

♦The DVI 201 actively buffers the HDCP key.

Troubleshooting

DVI signals run at a very high frequency and are especially susceptible to bad video connections, too many adapters, or cables that are too long. To avoid the loss of an image or introduction of image jitter, follow these guidelines:

•The DVI cable on the input to the transmitter or

the output of the receiver should not exceed 10' (3 m).

•Use only cable designed for DVI signals.

•Limit or avoid the use of adapters.

•If the display exhibits a flashing black or blue screen, snow, or other distortion, a non-HDCP compliant display may be receiving an HDCP-encrypted signal.

Check for an HDCP problem by ejecting the DVD from the player. If the display distortion stops and the DVD menu or screen saver image is clear, the problem is HDCP-related.

•Always power the display before the DVI video source in order for the source to retrieve the DDC from the display.

•The DVI 201 works as described in point-to-point applications. Do not use any additional adapters, patch panels, or couplers with the input DVI cables, output DVI cables, and/or twisted pair cables. Additional links in the signal chain can result in the reduction of signal integrity and overall cable length performance.

2-30 DVI 201 Tx/Rx • Installation and Operation

DVI 201 Tx/Rx • Installation and Operation 2-31

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Extron electronic DVI 201 Rx, DVI 201 Tx user manual Troubleshooting
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DVI 201 Tx, DVI 201 Rx specifications

Extron Electronics is known for its innovative solutions in the field of professional AV signal distribution and extension. Among its robust product lineup are the DVI 201 Rx and DVI 201 Tx devices, which are essential for transmitting and receiving digital video signals with exceptional performance and reliability.

The Extron DVI 201 Tx is a DVI transmitter that seamlessly converts DVI signals to a format suitable for long-distance transmission. It features a DVI connector for input and utilizes advanced technologies to ensure minimal signal degradation. The DVI 201 Tx supports high-resolution video up to 1920x1200 at 60 Hz, making it ideal for high-definition applications, including presentations, video conferencing, and digital signage.

On the receiving end, the DVI 201 Rx is designed to receive the transmitted DVI signals and convert them back into a format ready for display. This device also supports resolutions up to 1920x1200 at 60 Hz, ensuring that users can enjoy crystal-clear image quality without loss of detail. The DVI 201 Rx features a straightforward installation process, allowing for plug-and-play functionality that reduces setup time and complexity.

Both the DVI 201 Tx and DVI 201 Rx employ Extron’s patented technology for signal integrity, which includes the use of equalization and error correction to maintain the reliability of the transmitted signals over longer distances. This aspect is crucial for installations that may involve several hundred feet of cabling, where conventional methods could lead to signal loss or corruption.

One of the key characteristics of both the DVI 201 Tx and DVI 201 Rx is their compatibility with a wide range of DVI-enabled devices. This versatility is particularly beneficial in diverse installation environments, such as corporate offices, classrooms, and control rooms, where different types of hardware may be in use.

Furthermore, both devices are designed with a compact form factor, allowing for easy placement in various setups, whether they are rack-mounted or positioned directly next to display devices. The robust construction and durable components ensure longevity and consistent performance over time, meeting the demands of professionals in the AV industry.

In summary, the Extron DVI 201 Rx and DVI 201 Tx are streamlined solutions for digital video signal transmission, showcasing innovative technology, high resolution support, and dependable performance, making them the preferred choice for AV professionals seeking quality and reliability.
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