Wall Plate DigitalMedia™ CAT Transmitter 400

  • DM-TX-400-3G
  • DM-TX-400-3G: Front, white and black

Wall Plate DigitalMedia™ CAT Transmitter 400


Provides a remote input connection for HDMI®, RGB, SPDIF, and analog AV sources as part of a complete DigitalMedia™ System. Connects to the DM® CAT input of a DM Switcher or Receiver via DM Cable. Includes a USB HID device port, allowing a mouse/keyboard to be connected for controlling a computer or other host device at a different location. Mounts in a triple-gang electrical box.

More Details

The DM-TX-400-3G is a DM® CAT transmitter and switcher that installs in a triple-gang electrical box to provide a convenient interface for computers and high-definition AV sources as part of a complete Crestron® DigitalMedia™ system. The DM-TX-400-3G is ideal for wall, lectern, and floor box applications in a boardroom, classroom, auditorium, or residence. It connects to the head end or display location using a single Crestron DM cable, providing HDMI®, VGA, and analog video and audio inputs, plus a USB HID host port. Standard gang-box mounting allows for installation adjacent to an Ethernet jack (Crestron MP-WP183 or equivalent) for a total connectivity solution.

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.

Multimedia Computer/AV Interface
The DM-TX-400-3G provides versatile switching among four inputs. The inputs can be configured to switch automatically or be selected 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 DVI and DisplayPort Multimode signals using an appropriate adapter or interface cable.
  • PC — This VGA type input handles analog RGB signals up to WUXGA 1920x1200 pixels, as well as analog video up to 1080p60. A 1/8" (3.5mm) stereo audio input is included to accommodate analog audio signals from an unbalanced line-level source or headphone output.
  • Component Video — Accepts analog YPbPr component video signals up to 1080p60, and includes a S/PDIF digital audio input.
  • Composite Video — Accepts the connection of an NTSC or PAL composite video source with stereo unbalanced line-level audio.

Note: Audio breakaway capability enables any analog or SPDIF audio input to be used with any video input.

A single DM CAT output is provided for connection to a DM switcher or receiver. Used with a single DM CAT Receiver/Room Controller and optional Crestron Control System, the DM-TX-400-3G affords a simple solution for extending a multimedia computer or AV signal to a single display up to 450 feet (137 m) away. As part of a larger system using a DM-MD series switcher, multiple DM-TX-400-3Gs may be installed to enable the distribution of several sources at different locations to feed multiple displays throughout any room or larger facility.

Keyboard/Mouse Extender
The DM-TX-400-3G functions as a keyboard/mouse extender, allowing a USB HID-compliant keyboard and/or mouse to be connected at the wall plate and used to control a computer or other component located at the central equipment rack or some other location.

EDID Format Management
The DM-TX-400-3G 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-400-3G, ensuring reliable operation by instructing sources to output only the resolutions and formats that can be handled by the displays and system wiring.

CEC Embedded Device Control
The primary objective of every Crestron system is to enable precisely the control desired for a seamless user experience. DigitalMedia provides an alternative to conventional IR and RS-232 device control by harnessing the CEC (Consumer Electronics Control) signal embedded in HDMI. Through its connection to the control system, the DM-TX-400-3G 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. Through proper CEC signal management, DigitalMedia allows you to take control of each device in the system as you like.

Simple Wall Box Mounting
The DM-TX-400-3G is designed to be installed using a 3-gang electrical box or plaster ring. It also fits a 3-gang opening in a typical 6" deep floor box. The DM cable is terminated to the rear of the transmitter using screw terminals. The unit is powered via the DMNet® connection. An array of indicators on the front of the DM-TX-400-3G provides for easy setup and troubleshooting. Advanced configuration is enabled through Crestron Toolbox software.

Please refer to the DigitalMedia Resources Webpage at for additional design tools and reference documents.

  • 3-gang wall box mount design
  • Allows quick, easy setup and diagnostics
  • Also fits in a typical 6" deep floor box
  • Also supports DVI and DisplayPort Multimode sources
  • Available in black or white finish
  • Built-in 4x1 AV switcher with auto-switching and analog/SPDIF audio-breakaway
  • Detects and reports detailed video and audio input information
  • DigitalMedia™ CAT transmitter and multimedia interface
  • DM® CAT output supports up to 450 ft (137 m) cable length
  • Enables device control via CEC
  • Handles Dolby Digital®, DTS®, and uncompressed 7.1 linear PCM audio
  • Handles HD video with HDCP
  • Includes S/PDIF, RCA, and mini-TRS audio inputs
  • Includes USB HID keyboard/mouse port
  • Performs automatic AV signal format management via EDID
  • Powered over the DMNet® connection
  • Provides HDMI®, RGB, component, and composite video inputs
  • QuickSwitch HD® technology achieves fast, reliable switching

Analog-To-Digital Conversion 24-bit 48 kHz
Formats, Analog Stereo 2-channel
Formats, HDMI & SPDIF Dolby Digital®, Dolby Digital EX, DTS®, DTS-ES, DTS 96/24, 2ch PCM
Formats, HDMI only Up to 8ch PCM
Input Level Compensation (analog) ±10 dB
Input Signal Types HDMI, DisplayPort Multimode[3], S/PDIF coaxial, analog stereo
Output Signal Type DM CAT
Performance (analog) Frequency Response: 20Hz to 20kHz ±0.75dB;
S/N Ratio: >90dB, 20Hz to 20kHz A-weighted;
THD+N: <0.05% @ 1kHz;
Stereo Separation: >90dB
Switcher 4x1 combination digital/analog switch
DigitalMedia DM CAT, DMNet®, HDCP management, EDID format management, CEC
USB Supports USB HID class devices
AUDIO IN (1) 3.5mm TRS mini phone jack;
Unbalanced stereo line-level audio input;
Input Level: 2 Vrms maximum;
Input Impedance: 10k Ohms
HDMI IN (1) 19-pin Type A HDMI female;
HDMI digital video/audio input;
Also supports DVI and DisplayPort Multimode[3]
L, R (2) RCA female;
Unbalanced stereo line-level audio input;
Input Level: 2 Vrms maximum
Input Impedance: 15k Ohms
PC IN (1) DB15HD female;
RGB (VGA), component, S-Video, or composite video input[4];
Formats: RGBHV, RGBS, RGsB, YPbPr, Y/C, NTSC, PAL;
Input Levels: 0.5 to 1.5 Vp-p with built-in DC restoration;
Input Impedance: 75 Ohms;
Sync Input Type: Autodetect RGBHV, RGBS, RGsB, YPbPr;
Sync Input Level: 3 to 5 Vp-p;
Sync Input Impedance: 1k Ohms
SPDIF (1) RCA female;
S/PDIF coaxial digital audio input;
Input Impedance: 75 Ohms nominal
USB HID (1) USB Type A female;
USB 2.0 host port for connection of a mouse/keyboard or other USB HID-compliant device
VID (1) RCA female, composite video input;
Input Level: 1 Vp-p nominal;
Input Impedance: 75 Ohms nominal
Y, Pb, Pr (3) RCA female comprising (1) component (YPbPr) video input;
Input Level: 1 Vp-p nominal;
Input Impedance: 75 Ohms nominal
D, M (1) DM CAT output composed of (16) captive screw terminals with (2) grounded strain reliefs;
Connects to DM CAT input of a DM switcher, receiver/room controller, or other DM device via DM-CBL cable[2]
G (1) Flying lead, chassis ground connection
G B A 24 (1) DMNet port composed of (4) captive screw terminals;
Connects to DMNet port of a DM switcher, receiver/room controller, or other DM device via DM-CBL cable[2]
DM LINK (1) green LED, indicates DM link status
HDMI (1) green LED, indicates HDMI input is selected
PC (1) green LED, indicates PC input is selected
PC (1) green LED, indicates VID input is selected
PWR (1) green LED, indicates operating power supplied via DMNet
RESET (1) miniature recessed pushbutton for hardware reset
SETUP (1) red LED and (1) miniature recessed pushbutton for Ethernet setup
YPbPr (1) green LED, indicates YPbPr input is selected
Depth 2.53 in (64 mm)
Height 4.12 in (105 mm)
Width 5.30 in (135 mm)
Construction Metal
Flush Mount Mounts in a 3-gang electrical box or in a 3-gang opening in a typical 6 inch deep floor box, 2.75 inch minimum mounting depth required, decorator style faceplate not included
Heat Dissipation 40 BTU/Hr
Humidity 10% to 90% RH (non-condensing)
Temperature 32° to 104°F (0° to 40°C)
DMNet Power Usage 12 Watts (0.5 Amps @ 24 Volts DC)
Formats HDMI, DVI, HDCP content protection support, computer up to UXGA/WUXGA, HD up to 1080p60, NTSC or PAL
Input Resolutions, HDMI & DVI, Interlaced 720x480@30Hz (480i), 720x576@25Hz (576i), 1920x1080@25Hz (1080i25), 1920x1080@30Hz (1080i30), plus any other resolution allowed by HDMI up to 165MHz pixel clock
Input Resolutions, HDMI & DVI, Progressive 640x480@60Hz, 720x480@60Hz (480p), 720x576@50Hz (576p), 800x600@60Hz, 848x480@60Hz, 852x480@60Hz, 854x480@60Hz, 1024x768@60Hz, 1024x852@60Hz, 1024x1024@60Hz, 1280x720@50Hz (720p50), 1280x720@60Hz (720p60), 1280x768@60Hz, 1280x800@60Hz, 1280x960@60Hz, 1280x1024@60Hz, 1360x768@60Hz, 1365x1024@60Hz, 1366x768@60Hz, 1400x1050@60Hz, 1440x900@60Hz, 1600x900@60Hz, 1600x1200@60Hz, 1680x1050@60Hz, 1920x1080@24Hz (1080p24), 1920x1080@25Hz (1080p25), 1920x1080@50Hz (1080p50), 1920x1080@60Hz (1080p60), 1920x1200@60Hz, 2048x1080@24Hz, 2048x1152@60Hz, plus any other resolution allowed by HDMI up to 165MHz pixel clock
Input Resolutions, RGB 640x480@60Hz, 720x480@60Hz (480p), 720x576@50Hz (576p), 800x600@60Hz, 848x480@60Hz, 1024x768@60Hz, 1280x720@50Hz (720p50), 1280x720@60Hz (720p60), 1280x768@60Hz, 1280x800@60Hz, 1280x960@60Hz, 1280x1024@60Hz, 1360x768@60Hz, 1366x768@60Hz, 1400x1050@60Hz, 1440x900@60Hz, 1600x1200@60Hz, 1680x1050@60Hz, 1920x1080@50Hz (1080p50), 1920x1080@60Hz (1080p60), 1920x1200@60Hz, 2048x1152@60Hz
Input Signal Type HDMI®, DVI[3], DisplayPort Multimode[3], RGB, component (YPbPr)[4], S-Video (Y/C)[4], composite[4]
Output Signal Type DM® CAT (DigitalMedia™ over twisted-pair copper wire)
Switcher 4x1 combination digital/analog switch, Crestron QuickSwitch HD®
14.4 oz (408 g)

Available Models