The DM-TX-300N is a DM® CAT transmitter and switcher that offers a versatile interface for computers and high-definition AV sources as part of a complete Crestron® DigitalMedia™ system. Compact and rack-mountable, the DM-TX-300N connects to the head end or display location using a single Crestron DM cable. It provides HDMI®, DVI, VGA, S/PDIF, and analog video and audio inputs, plus Ethernet, RS-232, and IR control ports for a total connectivity solution.

Installed in a stationary podium or equipment rack, the DM-TX-300N provides an ideal solution for integrating rack-mounted sources, switchers, and AV receivers into the DigitalMedia system. Mounted in a movable lectern or AV cart, or just as a portable device, it affords a simple means for connecting laptops, cameras, and other portable sources at any number of wall plates and floor boxes throughout a conference center or auditorium, requiring just a single DM CAT connection (MP-WP185) at each location.

DigitalMedia™
As the leader in HDMI and control system technologies, Crestron developed DigitalMedia (DM) to deliver the first complete HD AV distribution system to take HDMI to a higher level. DigitalMedia allows virtually any mix of HDMI and other AV sources to be distributed throughout a home, office, school, or virtually any other facility. DigitalMedia CAT distributes uncompressed digital video and audio signals up to 450 feet (137 m) using Crestron DM cable[1].Multimedia Computer/AV Interface
The DM-TX-300N provides versatile switching among three different video and audio sources. The inputs can be selected manually from the front panel or through a Crestron control system. Inputs include:

• HDMI — Supports HD 1080p60 video and WUXGA computer signals with HDCP and multi-channel lossless audio. Also handles DisplayPort Multimode signals using an appropriate adapter or interface cable.
• DVI-I — This input handles DVI and analog RGB signals up to WUXGA 1920x1200 pixels, as well as analog video up to 1080p60[2]. A stereo audio input is included to accommodate the analog audio signal from a balanced or unbalanced line-level source.
• Video — This multi-format video input accepts analog YPbPr component video signals up to 1080p60, as well as standard definition NTSC/PAL composite and S-Video. A choice of S/PDIF digital audio or stereo unbalanced line-level audio inputs is included[3c].

Note: Audio breakaway capability enables virtually any audio input to be used with any video input.[3]A single DM CAT output is provided for connection to a DM switcher or receiver.[1] Used with a single DM CAT Receiver/Room Controller and optional Crestron Control System, the DM-TX-300N affords a simple solution for extending a multimedia computer or AV signal to a single display up to 450 feet (137 m) away[1]. As part of a larger system using a DM-MD series switcher, multiple DM-TX-300Ns may be installed to enable the distribution of several sources at different locations to feed multiple displays throughout any room or larger facility.An HDMI output is also included to feed a local monitor. The HDMI output may be set to follow the DM output or to provide a constant pass-through signal from the DVI-I input.EDID Format Management
The DM-TX-300N allows for management of the EDID (Extended Display Identification Data) information that passes between the display devices and input sources in the system. Using Crestron Toolbox™ software, the format and resolution capabilities of each device can be assessed and managed through the DM-TX-300N, ensuring reliable operation by instructing sources to output only the resolutions and formats that can be handled by the displays and system wiring.LAN Connectivity
Along with high-definition AV and control, DigitalMedia also integrates high-speed Ethernet networking for a total signal distribution solution. The DM-TX-300N includes a 10/100 Ethernet port, providing a convenient LAN connection for a local network device.Embedded Device Control
The primary objective of every Crestron system is to enable precisely the control desired for a seamless user experience. The DM-TX-300N includes built-in IR, RS-232, and Ethernet control ports to allow programmable control of the devices connected to it. But, it can also provide an alternative to such conventional control methods by harnessing the CEC (Consumer Electronics Control) signal embedded in HDMI. Through its connection to the control system, the DM-TX-300N provides a gateway for controlling the connected source device right through the HDMI connection, potentially eliminating the need for any dedicated control wires or IR emitters.Compact and Versatile
The DM-TX-300N is designed to be placed on a shelf or mounted in an equipment rack or lectern. It is compact enough to fit inside a presentation lectern or beneath a table. An array of indicators on the front of the DM-TX-300N provides for easy setup and troubleshooting. Advanced configuration is enabled through Crestron Toolbox software.A Digital Upgrade for Legacy Systems
The DM-TX-300N also affords a perfect signal converter for integrating DigitalMedia with analog-based systems like Crestron MPS, QuickMedia®, and the CEN-RGBHV Series. A simple HD15 VGA cable connected between the output of an MPS system and the DVI-I input of the DM-TX-300N allows every RGB, component, S-Video, and composite video input on the MPS to be converted to DigitalMedia[2]. Analog audio is converted similarly through a balanced stereo audio cable.Please refer to the DigitalMedia Resources Webpage at http://www.crestron.com/dmresources/ for additional design tools and reference documents.