DM NVX™ technology transports ultra high‑definition 4K60 4:4:4 video over standard Gigabit Ethernet with no perceptible latency or loss of quality. Using standard network switches and CAT5e UTP wiring, a DM NVX system delivers a high‑performance virtual matrix routing solution that is economically advantageous and infinitely scalable for any enterprise or campus‑wide 4K content distribution application. Professional onboard scaling, HDR10 support, and HDCP 2.2 compliance ensure the ultimate in picture quality and compatibility for all of today’s varied media sources.^{1, 2}

The Crestron® DM‑NVX‑351 is a compact AV over IP encoder/decoder designed to function as either a transmitter or receiver.  Featuring secure web‑based control and management, auto‑switching HDMI® inputs and a scaling HDMI output, an analog audio input or output, USB 2.0 and KVM integration, video wall processing, and support for copper and fiber LAN connectivity, the DM‑NVX‑351 offers a one‑stop solution for a network AV installation of any size.^{2, 3}

The DM‑NVX‑351 includes all features of the DM‑NVX‑350 with the addition of surround sound to stereo downmixing. Refer to the "7.1 Surround Sound Audio with Downmixing" section for details.

NOTE: DM NVX products are compatible with Crestron 3-Series® or later control systems.

Real‑Time 4K60 Video Distribution
Engineered for demanding conference room and classroom applications, DM NVX technology ensures real‑time, full‑motion 4K60 video performance for the presentation of multimedia, videoconferencing, and live camera images. Interactive functions such as mousing and game play are fluid and natural.

A DM NVX system is engineered for stability and reliability. Forward Error Correction ensures that AV data is delivered without interruption. Line‑synchronized outputs ensure perfect synchronization of content across multiple displays for applications such as digital signage and video walls. Variable Multicast TTL (Time To Live) enables traversing multiple network routers for optimal flexibility.

Pixel Perfect Processing Technology
A DM NVX system incorporates Pixel Perfect Processing technology, which provides flawless video transport in all applications. Depending on the operating mode, the DM‑NVX‑351 can encode or decode a video signal to achieve imperceptible end-to-end latency of less than 1 frame. The image quality of the source is maintained across a 1-Gigabit network at any resolution up to 4K60 4:4:4.

Enterprise‑Grade Security
A secure AV network ensures reliability by protecting the integrity and privacy of the content. Every device on the network must be secure to protect against intrusions. Using advanced security features and protocols such as 802.1X authentication, Active Directory® credential management, AES-128 content encryption, PKI authentication, TLS, SSH, and HTTPS, a DM NVX system delivers a true enterprise‑grade network AV solution engineered to fulfill demanding IT policies.

Encoder and Decoder in One
In a single compact device, the DM‑NVX‑351 is configurable to operate as either a network AV encoder or decoder:

• As an encoder, the DM‑NVX‑351 allows the HDMI signal of a laptop computer, camera, or other media source to be transmitted over the network to one or many decoders.¹
• As a decoder, the DM‑NVX‑351 receives the signal from a DM NVX encoder and feeds it to a display device via the HDMI output. The decoder can quickly and easily switch between multiple encoders on the network alongside locally connected HDMI sources.¹

The DM‑NVX‑351 provides a versatile, cost‑effective solution for applications that require encoder and decoder operating modes in one device. The operating mode can be reconfigured dynamically in under 1 minute via a control system or web browser or can be changed by using the onboard Setup button.

2x1 HDMI® Auto‑Switcher
The DM‑NVX‑351 includes two HDMI inputs. Switching between the two inputs can be performed automatically using auto‑switching mode, programmatically via a control system, manually using the onboard Input Select button, or through a computer using a web browser. When used as a decoder mounted behind a typical conference room display device, the HDMI inputs provide a convenient way to connect a Crestron AirMedia® presentation gateway, videoconferencing codec, or mini computer.¹

HDMI Output with 4K60 4:4:4 Scaler
When the DM‑NVX‑351 is configured as a decoder, the HDMI output feeds the decoded signal to the HDMI input of a local display device, switcher, or other equipment. The built‑in scaler ensures an optimal image, scaling the encoded source resolution up or down to match the native resolution of the display device. When the DM‑NVX‑351 is configured as an encoder, the HDMI output can be used to feed a local display, confidence monitor, or audio system.^{1, 4}

Copper or Fiber LAN Connectivity
The DM‑NVX‑351 includes two RJ-45 1000Base-T LAN ports. Either port can be used as the primary LAN connection, allowing the other port to provide a network connection for an AirMedia gateway, display device, or other local device. These ports can also be used to daisy‑chain multiple endpoints feeding a single‑source video wall or individual displays that show the same video image.LAN port 1 is also capable of receiving power from a Crestron power injector (DM‑PSU‑ULTRA‑MIDSPAN), a UPOE compliant Ethernet switch, or an approved third‑party PSE.^{2, 5}

Connection to a fiber-optic network is facilitated by inserting an appropriate SFP transceiver module (Crestron SFP‑1G Series) into the SFP port of the DM‑NVX‑351. A selection of modules is offered to accommodate various multimode and single‑mode fiber types.³

A DM NVX system can be deployed on an existing corporate or campus network or on a dedicated network. For information about network requirements and guidelines, refer to the DM NVX System Design Guide, Doc. 7977, at https://www.crestron.com/nvx.

Video Wall Processing
A video wall composed of up to 64 individual displays can be configured using multiple DM‑NVX‑35x(C) Series endpoints. Each endpoint provides fully adjustable zoom capability and bezel compensation to accommodate a range of video wall configurations and display types. One DM-NVX-35x(C) endpoint is required per display, supporting configurations of up to eight wide by eight high.

Text Overlay
The ability to display dynamic or fixed text on screen provides a means to label the video source or to display special instructions, schedules, announcements, alerts, and other messaging.

7.1 Surround Sound Audio with Downmixing
DM NVX technology supports the lossless transport of 7.1 surround sound audio signals, including Dolby® TrueHD, Dolby Atmos®, DTS HD®, DTS:X®, and uncompressed linear PCM. The DM‑NVX‑351 can decode the incoming multichannel surround sound signal, whether from the network or an HDMI input, and downmix that signal to stereo. The stereo downmix signal is automatically routed to the onboard analog output6, while the HDMI output can be configured to output either stereo or multichannel signals. As an encoder, the DM‑NVX‑351 distributes both stereo and multichannel signals simultaneously over the network, allowing either signal to be selected at any decoder on the network.

Analog Audio Embedding or De‑embedding
A balanced stereo analog audio port is included, which can be configured as either an input or output. As an input, the port allows a stereo audio source to be connected and combined with the video signal from either HDMI input or the incoming network video stream. As an output, the port can provide a stereo line‑level signal to feed a local sound system or soundbar. The output volume is adjustable via a control system or web browser.⁶

Breakaway Audio
A DM NVX decoder can select and combine separate video and audio signals from two different inputs—even two different encoders. There are two exceptions: 1) Signals cannot be combined between the two onboard HDMI inputs, and 2) Combining signals from two separate encoders is limited to 2‑channel stereo audio.⁷

USB 2.0 and KVM Integration
DM NVX technology supports the extension of USB signals, which can be switched and routed alongside the AV signal or separately via a control system. USB 2.0 HOST and DEVICE ports are provided on the DM‑NVX‑351, allowing a USB mouse, keyboard, or other peripheral device to be connected to a remote endpoint and routed to a computer or other host at the local endpoint. In addition to KVM switch functionality, various types of USB peripherals are supported, including whiteboards, touch screens, game controllers, cameras, mobile devices, headsets, and flash drives.⁸

USB 2.0 data transport can be configured for Layer 2 or Layer 3. Layer 2 supports USB signal extension in point-to-point and multipoint applications. USB signals can be routed from the HOST port of up to seven remote DM NVX endpoints to the DEVICE port of a single local DM NVX endpoint. Layer 2 also supports Crestron USB over Ethernet Extender Modules (USB‑EXT‑DM‑LOCAL or USB‑EXT‑DM‑REMOTE), which can be used in locations that do not include DM NVX endpoints. USB signals can be routed between DM NVX and USB‑EXT‑DM devices under the management of a control system.⁹

USB 2.0 Layer 3 data transport supports USB signal extension in DM NVX point-to-point applications across VLANs. Layer 3 support is not applicable to USB-EXT-DM devices.

Device Controller
The DM‑NVX‑351 includes built‑in RS‑232 and IR ports for control of the connected display, camera, or other devices under the management of a control system. Additional control capability is provided by CEC (Consumer Electronics Control) over the HDMI connections. Under the management of a control system, the DM‑NVX‑351 can control the display and source devices, potentially eliminating the need for dedicated serial cables or IR emitters.¹⁰

Web‑Based Setup
Setup of the DM‑NVX‑351 is accomplished by using a web browser. Full control and monitoring of the device is enabled through integration with a control system or with a DM NVX Director™ virtual switching appliance.

Compatibility with DM NVX Director Virtual Switching Appliances
For applications that are small to moderate in size, a network of DM NVX endpoints can be configured and controlled with the use of a control system. For larger enterprise and campus‑wide signal routing applications, adding a DM NVX Director virtual switching appliance (DM‑XIO‑DIR‑80, DM‑XIO‑DIR‑160, or DM‑XIO‑DIR‑ENT) enhances and streamlines the entire configuration and control process. A DM NVX Director appliance provides a central point of management and enables the creation of multiple virtual matrix switchers through one easy‑to‑use web‑based portal.

Crestron XiO Cloud™ Service Support
The DM‑NVX‑351 is compatible with the Crestron XiO Cloud service, which is an IoT (Internet of Things) based platform for remotely provisioning, monitoring, and managing Crestron devices across an enterprise or an entire client base. The service enables installers and IT managers to deploy and manage thousands of devices in the amount of time it would ordinarily take to manage a single device. For more information, visit www.crestron.com/xiocloud.

Low‑Profile Installation
The DM‑NVX‑351 mounts conveniently to a flat surface or rack rail, and fits easily behind a flat panel display, above a ceiling‑mounted projector, beneath a tabletop, or inside a lectern, AV cart, or equipment cabinet. All connectors and LED indicators are positioned on the front and rear of the device, offering optimal access and visibility for a clean, serviceable installation. Power is provided using the included 100‑240 V universal power pack, an optional power injector (Crestron DM‑PSU‑ULTRA‑MIDSPAN), a UPOE compliant Ethernet switch, or an approved third‑party PSE.⁵

For additional design tools and reference documents, refer to the DM NVX web page at https://www.crestron.com/nvx.