DM-NVX-351 [Crestron Electronics, Inc.]

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DM-NVX-351

DM NVX® 4K60 4:4:4 HDR Network AV Encoder/Decoder with Downmixing

A reliable, high‑performance AV over IP encoder or decoder that transports 4K60 4:4:4 video over standard Gigabit Ethernet with no perceptible latency or loss of quality. Supports HDR10 and HDCP 2.2 with built‑in scaling and video wall processing, adaptive bit rate, surround sound to stereo downmixing, USB and KVM routing, and optional fiber connectivity. Provides a secure, scalable 4K signal routing solution for enterprise and campus‑wide content distribution applications.

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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, High Dynamic Range support (HDR10), and HDCP 2.2 compliance ensure the ultimate in picture quality and compatibility for all of today’s varied media sources.^{1, 2}

The DM‑NVX‑351 is a compact AV over IP encoder/decoder designed to function as either a transmitter or receiver. Capable of handling a network AV installation of any size, the DM‑NVX‑351 includes features such as secure web‑based control and management, auto‑switching HDMI® inputs, a scaling HDMI output, video wall processing, an analog audio input or output, surround sound to stereo downmixing, native AES67 transmit and receive capability, USB 2.0 and KVM integration, and support for copper and fiber Ethernet connectivity.^{2, 3}

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 gameplay and the use of a mouse are fluid and natural.

A DM NVX system is engineered for stability and reliability. 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
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 or Decoder Functionality
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 a single device. The operating mode can be reconfigured dynamically in less than 1 minute via a control system or web browser or can be changed by using the onboard Setup button.

NOTE: For compatibility with DM NVX Software, all DM NVX hardware endpoints need to use firmware version 7.1.5259.00069. DM NVX Software is not compatible with firmware version 7.1.5259.00084.

Auto-Switching HDMI® Inputs
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 small form factor 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}

Video Wall Processing
A video wall composed of up to 64 individual displays can be configured using multiple DM NVX 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 endpoint is required per display, supporting configurations of up to eight wide by eight high.

Dynamic Text Overlay
The DM-NVX-351 enables the display of dynamic text, providing a means to label the video source or to display special instructions, schedules, announcements, alerts, and other messaging.

Image Preview
Image preview provides still images (thumbnails) that show the current video being received by an input of a DM NVX encoder or displayed by an output of a DM NVX decoder. Still images are shown at 1 frame per second. Image preview supports the maximum resolution of the source and scales the image while maintaining the aspect ratio. Images can be previewed in the DM NVX web interface and accessed remotely using a web browser. The images can also be previewed on a Crestron touch screen or third-party interface.

Background Image for On-Screen Display
When the DM-NVX-351 is configured as a decoder, an image can be uploaded to the device for use as a background image on a display whenever active video content is not being displayed. Supported image file types are .jpeg, .jpg, and .png. The supported maximum resolution of an image is 3840x2160 pixels. Up to 20 image files can be uploaded for a total storage capacity of up to 100 MB.

Test Pattern Generator
When the DM-NVX-351 is configured as an encoder, the built-in test pattern generator can be used during setup to ensure that video streaming is functional. The test pattern generator can also be used as a tool for the adjustment, calibration, and alignment of displays, projectors, and video walls. The DM NVX encoder can send the test pattern to any routed DM NVX decoder.

Fixed, Adaptive, or Variable Bit Rate
In DM NVX encoder mode, the bit rate of a stream can be set to fixed, adaptive, or variable:

A fixed bit rate, also referred to as Constant Bit Rate (CBR), is user specified and can be set to a value ranging from 200 Mbps to 950 Mbps.⁵
Adaptive bit rate (ABR) enables the encoder to automatically set a fixed bit rate based on the input resolution of the stream. For example, the adaptive bit rate for a common resolution such as 1920x1080p@60Hz (1080p60) would automatically be set to 400 Mbps. Adaptive bit rate makes better use of the available bandwidth than a user-specified fixed bit rate.
Variable bit rate (VBR) enables the encoder to automatically vary the bit rate based on the content and input resolution of the stream. The bit rate can vary from less than 150 Mbps to a maximum of 750 Mbps. A variable bit rate results in the use of less bandwidth to produce the same image quality as a user-specified fixed bit rate or an adaptive bit rate.

The web interface or a control system can be used to set a fixed bit rate or to enable adaptive or variable bit rate functionality.

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

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 PCM⁷. 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.

AES67 Audio Embedding or De-embedding
AES67 support enables the selected audio source to be transmitted as a 2-channel AES67 source while another 2-channel AES67 audio stream is received from a Crestron DSP or other third-party device and combined with the video signal.

In DM NVX encoder mode, the received AES67 audio stream can be output via the local HDMI output, primary AV stream, and analog audio output. In DM NVX decoder mode, the received AES67 audio stream can be combined with the video and then output via the HDMI output and analog audio output.

NOTE: An AES67 audio stream that is received by a DM NVX endpoint cannot be transmitted from that endpoint.

Breakaway Audio
A DM NVX decoder can select and combine separate video and audio signals from two different inputs—even two different encoders.⁸

Copper and Fiber Ethernet Connectivity
The DM‑NVX‑351 includes two RJ-45 1000BASE-T LAN ports (Ethernet ports 1 and 2) and one SFP port (Ethernet port 3). The SFP port enables connection to a fiber-optic network with the use of the appropriate Crestron SFP‑1G Series transceiver module (sold separately). A selection of modules is offered to accommodate various multimode and single-mode fiber types.³

Ethernet port 1, 2, or 3 can be used to transport video over a Gigabit Ethernet network. Ports 1 and 2 can also be used to provide network connections for an AirMedia gateway, display device, or other local device. In addition, the ports can be used to daisy-chain multiple endpoints feeding a single-source video wall or individual displays that show the same video image. Port 1 is also capable of receiving power from a Crestron power injector (DM‑PSU‑ULTRA‑MIDSPAN), PoE++ or UPOE compliant Ethernet switch, or third-party IEEE 802.3bt compliant PSE.^{2, 9}

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 AV-over-IP System Design Guide, Doc. 7977.

Network Port Selection
Network port selection enables network traffic to be managed and segregated based on traffic type. Internal VLANs are used to route different traffic types to specific external Ethernet ports, which can then be assigned to the various traffic types. AES67 audio can be separated from the primary video and control network resulting in a dedicated audio network.

Automatic Point-to-Point Connectivity
Point-to-point connectivity enables a DM NVX 4K60 4:4:4 encoder to be connected directly to a DM NVX 4K60 4:4:4 decoder to stream video, audio, and USB signals. Rather than being connected to a Gigabit Ethernet network, a 1000BASE-T Ethernet port of an encoder is connected directly to a 1000BASE-T port of a decoder. By default, point-to-point mode is enabled and can be disabled if desired.

When point-to-point mode is enabled and a direct connection between an encoder and decoder is automatically detected, no additional configuration is required for the encoder or decoder to operate in point-to-point mode; however, the operating mode of a DM-NVX-351 device must be configured correctly. If the device is to function as an encoder, the operating mode of the device must be configured as an encoder. If the device is to function as a decoder, the operating mode must be configured as a decoder. In addition, a control system is required for CEC (Consumer Electronics Control), IR, and RS-232 control.

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.¹⁰

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 Network extenders, which consist of the DM-NUX-L2, DM-NUX-R2, DM-NUX-L2-1G, DM-NUX-R2-1G, and legacy models (USB‑NX2‑LOCAL-1G, USB‑NX2‑REMOTE-1G, USB‑EXT‑DM‑LOCAL, and USB‑EXT‑DM‑REMOTE). The USB extenders can be used in locations that do not include DM NVX endpoints. USB signals can be routed between DM NVX endpoints and USB extenders under the management of a control system.¹¹

USB 2.0 Layer 3 data transport supports USB signal extension in DM NVX point-to-point applications across VLANs. DM NUX, USB NX2, and USB EXT DM devices do not support Layer 3.

Device Control
The DM‑NVX‑351 includes built‑in COM (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 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.

The COM port, IR port, and CEC over the HDMI output can also enable the display device to be turned on or off automatically without the use of a control system.

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.

Streamlined Management Using 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-NVX-DIR-80, DM-NVX-DIR-160, or DM-NVX-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.

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 PoE++, UPOE, or the included 100‑240 V universal power pack.⁹

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

Key Features

4K60 4:4:4 video over standard Gigabit Ethernet
HDR10 video support
Real-time video performance over the network
Pixel Perfect Processing technology
Enterprise-grade security including 802.1X, Active Directory® credential management, TLS, and AES-128
HDCP 2.2 compliant
Configurable as an encoder or decoder
Two auto-switching HDMI® inputs
One HDMI output with 4K60 4:4:4 scaler
Video wall processing
Dynamic text overlay
Image preview
Background image for on-screen display
Test pattern generator
Fixed, adaptive, or variable bit rate
Analog audio embedding or de-embedding
7.1 surround sound audio with downmixing
AES67 audio embedding and de-embedding
Breakaway audio
USB 2.0 and KVM signal extension and routing
Copper and fiber Ethernet connectivity
Network port selection
Automatic point-to-point connectivity
Device control via RS-232, IR, and CEC
Easy setup via built-in web pages
Compatibility with a Crestron® 3-Series® or later control system
Streamlined management using DM NVX Director® virtual switching appliances
.AV Framework™ technology support
XiO Cloud® service support
Crestron Home® OS support
API for full control of the DM-NVX-351
Compact, surface-mountable design
Powered via PoE++, UPOE, or the included power pack

4K60 4:4:4 performance and HDR support require the use of HDMI cables and couplers with a minimum TMDS bandwidth of 18 Gbps. If 4K60 4:2:0 or 4K30 4:4:4 performance is acceptable, cables and couplers with a minimum bandwidth of 10.2 Gbps may be used. Bandwidth loss is cumulative; therefore, performance may be reduced when inserting multiple cables and couplers inline.
The minimum cable required for DM NVX over 1000BASE‑T Ethernet (copper) is unshielded CAT5e. All Ethernet ports on the DM‑NVX‑351 are for connection to an Ethernet network or device. The Ethernet ports cannot be connected to the DM® ports of other Crestron devices.

A nonblocking network is required for DM NVX devices.
Use of the SFP port requires the purchase of a Crestron SFP‑1G Series transceiver module (sold separately). All Ethernet ports on the DM‑NVX‑351 are for connection to an Ethernet network or device. The Ethernet ports cannot be connected to the DM ports of other Crestron devices.
When the DM‑NVX‑351 is in encoder mode, the HDMI output resolution is matched to the resolution of the encoded source.
The minimum bit rate for 4K60 video is 350 Mbps. A bit rate below 350 Mbps may display a black screen.
The analog audio port can function as an input or output—not both.
The DM-NVX-351 does not down-mix Dolby Atmos MAT 2.0 audio.
Audio from one onboard HDMI input cannot be combined with video from the other onboard HDMI input. Combining audio from one encoder with video from another encoder is possible using the 2‑channel AES67 audio stream only. Multichannel audio from one encoder cannot be combined with video from another encoder.
Refer to the "Power" specifications section for approved powering options.
The DM‑NVX‑351 can be configured to accept the connection of a USB device or a USB host—not both. Crestron DM NVX products are engineered to deliver maximum compatibility with the widest possible range of USB products. Crestron does not guarantee that all USB products are compatible with DM NVX products. Consult the DM NVX AV-over-IP System Design Guide, Doc. 7977, for USB bandwidth considerations.
The DM‑NVX‑351 is not compatible with the USB HID signal extender technology found in other Crestron DM products.
In encoder mode, the stream type of the DM-NVX-351 must be set by using the web interface or a control system. The default setting is Pixel Perfect Processing for interoperability with DM NVX 4K60 4:4:4 decoders. For interoperability with a DM-NVX-D10, DM-NVX-D20, or DM-NVX-D200 decoder, the stream type of the DM-NVX-351 encoder must be set to DM-NVX-D10/D20/D200 Series. In addition, the resolution of the encoder must be set so that it does not exceed the maximum resolution of the DM-NVX-D10, DM-NVX-D20, or DM-NVX-D200 decoder.

In decoder mode, the proper stream type of the DM-NVX-351 is automatically used. For interoperability with DM NVX 4K60 4:4:4 encoders, Pixel Perfect Processing is automatically used as the stream type of the DM-NVX-351 decoder. For interoperability with DM-NVX-E10/E20 Series encoders, DM-NVX-E10/E20 Series is automatically used as the stream type of the DM-NVX-351 decoder.
3D formats are not supported.
HDMI connections require an appropriate adapter or interface cable to accommodate a DVI or Dual‑Mode DisplayPort signal. CBL‑HD‑DVI interface cables are available separately.

This product may be purchased from select authorized Crestron dealers and distributors. To find a dealer or distributor, please contact the Crestron sales representative for your area. A list of sales representatives is available online at www.crestron.com/How-To-Buy/Find-a-Representative or contact us for additional information by visiting www.crestron.com/contact/our-locations for your local contact.

This product is covered under the Crestron standard limited warranty. Refer to www.crestron.com/warranty for full details.

The specific patents that cover Crestron products are listed online at patents.crestron.com.

Certain Crestron products contain open source software. For specific information, please visit www.crestron.com/opensource.

Crestron, the Crestron logo, 3-Series, .AV Framework, AirMedia, Crestron Home, DigitalMedia, DM, DM NVX, DM NVX Director, QuickSwitch HD, and XiO Cloud are either trademarks or registered trademarks of Crestron Electronics, Inc. in the United States and/or other countries. Dolby, Dolby Atmos, and Dolby Digital are either trademarks or registered trademarks of Dolby Laboratories in the United States and/or other countries. DTS, DTS HD, and DTS:X are either trademarks or registered trademarks of DTS, Inc. in the United States and/or other countries. HDMI and the HDMI logo are either trademarks or registered trademarks of HDMI Licensing LLC in the United States and/or other countries. Active Directory is either a trademark or registered trademark of Microsoft Corporation in the United States and/or other countries. DisplayPort is either a trademark or registered trademark of Video Electronics Standards Association in the United States and/or other countries. UL is either a trademark or registered trademark of Underwriters Laboratories, Inc. in the United States and/or other countries. Other trademarks, registered trademarks, and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Crestron disclaims any proprietary interest in the marks and names of others. Crestron is not responsible for errors in typography or photography. Specifications are subject to change without notice. ©2022 Crestron Electronics, Inc.

XiO Cloud
Supported Products

Encoding/Decoding
Stream Type	Encoder: Pixel Perfect Processing (default) or DM-NVX-D10/D20/D200 Series;¹² Decoder: Pixel Perfect Processing or DM-NVX-E10/E20 Series¹²
Video Resolutions	Up to 4096x2160@60Hz (DCI 4K60), 4:4:4 color sampling, HDR10 and Deep Color support
Audio Formats	Multichannel (up to 8-channel LPCM or encoded HBR 7.1 surround sound), secondary 2-channel LPCM
Bit Rates	Encoder: Fixed (200 to 950 Mbps - user specified),⁵ Adaptive (dependent on input resolution of the stream), or Variable (less than 150 Mbps to maximum of 750 Mbps, dependent on content and input resolution of the stream); Decoder: Based on the stream received from the encoder
Streaming Protocols	RTP, SDP
Container	MPEG-2 transport stream (.ts)
Session Initiation	Multicast via secure RTSP
Copy Protection	HDCP 2.2, AES-128, PKI
Video
Input Signal Types	HDMI with HDR10, Deep Color, and 4K60 4:4:4 support^{1, 13} (Dual-Mode DisplayPort™ interface and DVI compatible¹⁴)
Output Signal Types	HDMI with HDR10, Deep Color, and 4K60 4:4:4 support¹ (DVI compatible¹⁴)
Switcher	3x1 in decoder mode (HDMI 1, HDMI 2, Stream) 2x1 in encoder mode, manual or auto-switching, breakaway audio⁶, Crestron QuickSwitch HD™ technology
Scaler	4K60 4:4:4 video scaler with motion-adaptive deinterlacing, intelligent frame rate conversion, Deep Color support, HDR10 support, widescreen format selection (zoom, stretch, maintain aspect ratio, or 1:1), video wall processing up to 8 wide x up to 8 high, static or dynamic text overlay
Copy Protection	HDCP 2.2
Resolutions	Common resolutions are listed in the following table.

Scan Type	Resolution	Frame Rate	Color Sampling	Color Depth
Progressive	4096x2160 DCI 4K and 3840x2160 4K UHD	30 Hz	4:4:4	12 bit
		60 Hz	4:2:0	12 bit
		60 Hz	4:2:2	12 bit
		60 Hz	4:4:4	8 bit
	2560x1600 WQXGA Reduced Blanking	60 Hz	4:4:4	8 bit
	2560x1440 WQHD Reduced Blanking	60 Hz	4:4:4	8 bit
	2560x1440 WQHD Reduced Blanking	120 Hz	4:4:4	8 bit
	2560x1080 UWFHD	60 Hz	4:4:4	8 bit
	2048x1152 QWXGA	60 Hz	4:4:4	12 bit
	2048x1080 DCI 2K	60 Hz	4:4:4	12 bit
	1600x1200 UXGA	60 Hz	4:4:4	12 bit
	1920x1200 WUXGA	60 Hz	4:4:4	12 bit
	1920x1080 FHD 1080p	60 Hz	4:4:4	12 bit
	1920x1080 FHD 1080p	120 Hz	4:4:4	8 bit
Interlaced (Input Only)	1920x1080 HD 1080i	30 Hz	4:4:4	12 bit
NOTE: The maximum supported resolution is 4096x2160 at 60 Hz with 4:4:4 color sampling. Custom resolutions are supported at pixel clock rates up to 600 MHz. NOTE: 1920X1080 FHD 1080p at 240 Hz is not supported.

Audio
Input Signal Types	HDMI (Dual-Mode DisplayPort interface compatible¹⁴), analog stereo⁶
Output Signal Types	HDMI (multichannel pass-through or 2-channel downmix), analog stereo (2-channel downmix)⁶
Digital Formats	Dolby Digital®, Dolby Digital EX, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos, DTS®, DTS ES, DTS 96/24, DTS HD High Res, DTS HD Master Audio, DTS:X, LPCM up to 8 channels⁷
Analog Formats	Stereo 2-channel
Analog-To-Digital Conversion	24-bit 48 kHz
Digital-To-Analog Conversion	24-bit 48 kHz
AES67	24-bit 48 kHz
Analog Performance	Frequency Response: 20 Hz to 20 kHz ±0.5 dB; S/N Ratio: >95 dB 20 Hz to 20 kHz A-weighted; THD+N: <0.005% @ 1 kHz; Stereo Separation: >90 dB
Analog Output Volume Adjustment	−80 to +20 dB
Audio Delay	0 to 1200 ms
Communications
Ethernet	100/1000 Mbps, auto-switching, auto-negotiating, auto-discovery, full/half duplex, TCP/IP, UDP/IP, CIP, DHCP, SSL, TLS, SSH, SFTP (SSH File Transfer Protocol), IEEE 802.1X, IPv4 only or both IPv4 and IPv6, Active Directory authentication, variable Multicast TTL, HTTPS web browser setup and control, Crestron 3-Series or later control system integration
USB	USB 2.0 host or device signal extension and routing, Layer 2 or Layer 3; USB 2.0 computer console (for setup)
RS-232	2-way device control and monitoring up to 115.2k baud with hardware and software handshaking (via control system); computer console (for setup)
IR/Serial	1-way device control via infrared up to 1.1 MHz or serial TTL/RS-232 (0-5 V) up to 19.2k baud (via control system)
HDMI	HDCP 2.2, EDID, CEC
DM NVX (via Ethernet)	HDCP 2.2, AES-128 AV content encryption with PKI authentication, RTP, secure RTSP, SDP, ONVIF, IGMPv2, IGMPv3, SMPTE 2022, FEC (Forward Error Correction)
Connectors
USB DEVICE	(1) USB Type B connector, female; USB 2.0 device port; USB signal extender port for connection to a computer or other USB 2.0 host¹⁰
USB HOST	(1) USB Type A connector, female; USB 2.0 host port; USB signal extender port for connection to a mouse, keyboard, or other USB 2.0 device;¹⁰ Available Power: 500 mA at 5 VDC
Ethernet 1	(1) 8-pin RJ-45 connector, female; 100BASE-TX/1000BASE-T Ethernet port;² PoE++ or UPOE PD (powered device) port; IEEE 802.3bt Type 3 Class 5 (60 W/4 pair) compliant⁹
Ethernet 2	(1) 8-pin RJ-45 connector, female; 100BASE-TX/1000BASE-T Ethernet port²
Ethernet 3	(1) SFP port; Accepts one Crestron SFP-1G Series transceiver module³
HDMI OUTPUT	(1) HDMI Type A connector, female; HDMI digital video/audio output¹(DVI compatible¹⁴)
HDMI INPUT 1 – 2	(2) HDMI Type A connectors, female; HDMI digital video/audio inputs;¹ (DVI and Dual-Mode DisplayPort interface compatible¹⁴)
AUDIO I/O	(1) 5-pin 3.5 mm detachable terminal block; Balanced/unbalanced stereo line-level audio input or output;⁶ Input Impedance: 24k Ohms balanced/unbalanced; Maximum Input Level: 4 Vrms balanced, 2 Vrms unbalanced; Output Impedance: 200 Ohms balanced, 100 Ohms unbalanced; Maximum Output Level: 4 Vrms balanced, 2 Vrms unbalanced
CONSOLE, SERIAL	(1) 8-pin RJ-45 connector, female; RS-232 computer console port (for setup)
CONSOLE, USB	(1) USB Type B connector, female; USB 2.0 computer console port (for setup)
IR 1 – 2	(1) 4-pin 3.5 mm detachable terminal block; Comprises (2) IR/Serial ports; IR output up to 1.1 MHz; 1-way serial TTL/RS-232 (0-5 V) up to 19200 baud; IRP2 emitter sold separately
COM	(1) 5-pin 3.5 mm detachable terminal block; Bidirectional RS-232 port; Up to 115.2k baud, hardware and software handshaking support
24VDC 2.0A	(1) 2.1 x 5.5 mm DC power connector; 24 VDC power input; PW-2420RU power pack included
G	(1) 6-32 screw; Chassis ground lug
Controls and Indicators
TX	(1) Green LED, indicates unit is in encoder (transmitter) mode
RX	(1) Green LED, indicates unit is in decoder (receiver) mode
OL	(1) Green LED, indicates an online connection to a control system via Ethernet
Ethernet 1 – 2	(4) LEDs, green indicates Ethernet link status, amber indicates Ethernet activity
Ethernet 3 LNK	(1) Green LED, indicates Ethernet link status
Ethernet 3 ACT	(1) Green LED, indicates Ethernet activity
HDMI OUTPUT	(1) Green LED, indicates video signal transmission at the HDMI output
HDMI INPUT 1 – 2	(2) Green LEDs, each indicates sync detection at the corresponding HDMI input
PWR	(1) Bi-color green/amber LED, indicates operating power supplied via PoE++, UPOE, or the included power pack, lights amber while booting and green when operating
SETUP	(1) Red LED and (1) push button, displays onscreen IP address and also used to change operating mode (TX or RX)
RESET	(1) Recessed push button, reboots the device
INPUT SEL	(1) Push button, enables manual input selection; (2) Bi-color green/amber LEDs, indicate the current active input and signal presence at each corresponding input
Power
Power Pack (Included)	Input: 1.3 A maximum @ 100-240 VAC, 50/60 Hz; Output: 2 A @ 24 VDC; Model: PW-2420RU
PoE++ or UPOE	IEEE 802.3bt Type 3 Class 5 (60 W/4 pair) compliant; Compatible with the DM-PSU-ULTRA-MIDSPAN, IEEE 802.3bt compliant Ethernet switch, or third-party compliant PSE
Power Consumption	35 W typical
Environmental
Temperature	32° to 104° F (0° to 40° C)
Humidity	10% to 90% RH (non-condensing)
Heat Dissipation	85 BTU/hr
Acoustic Noise	33 dBA typical
Enclosure
Chassis	Metal, black finish, integral mounting flanges, fan cooled; vented top, front, bottom, and sides
Mounting	Freestanding, surface mount, or attach to a single rack rail
Dimensions
Height	8.61 in. (219 mm)
Width	9.27 in. (236 mm)
Depth	1.50 in. (39 mm)
Weight
2.0 lb (0.91 kg)
Compliance
UL® Listed for US and Canada, CE, IC, FCC Part 15 Class B digital device

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4K60 4:4:4 performance and HDR support require the use of HDMI cables and couplers with a minimum TMDS bandwidth of 18 Gbps. If 4K60 4:2:0 or 4K30 4:4:4 performance is acceptable, cables and couplers with a minimum bandwidth of 10.2 Gbps may be used. Bandwidth loss is cumulative; therefore, performance may be reduced when inserting multiple cables and couplers inline.
The minimum cable required for DM NVX over 1000BASE‑T Ethernet (copper) is unshielded CAT5e. All Ethernet ports on the DM‑NVX‑351 are for connection to an Ethernet network or device. The Ethernet ports cannot be connected to the DM® ports of other Crestron devices.

A nonblocking network is required for DM NVX devices.
Use of the SFP port requires the purchase of a Crestron SFP‑1G Series transceiver module (sold separately). All Ethernet ports on the DM‑NVX‑351 are for connection to an Ethernet network or device. The Ethernet ports cannot be connected to the DM ports of other Crestron devices.
When the DM‑NVX‑351 is in encoder mode, the HDMI output resolution is matched to the resolution of the encoded source.
The minimum bit rate for 4K60 video is 350 Mbps. A bit rate below 350 Mbps may display a black screen.
The analog audio port can function as an input or output—not both.
The DM-NVX-351 does not down-mix Dolby Atmos MAT 2.0 audio.
Audio from one onboard HDMI input cannot be combined with video from the other onboard HDMI input. Combining audio from one encoder with video from another encoder is possible using the 2‑channel AES67 audio stream only. Multichannel audio from one encoder cannot be combined with video from another encoder.
Refer to the "Power" specifications section for approved powering options.
The DM‑NVX‑351 can be configured to accept the connection of a USB device or a USB host—not both. Crestron DM NVX products are engineered to deliver maximum compatibility with the widest possible range of USB products. Crestron does not guarantee that all USB products are compatible with DM NVX products. Consult the DM NVX AV-over-IP System Design Guide, Doc. 7977, for USB bandwidth considerations.
The DM‑NVX‑351 is not compatible with the USB HID signal extender technology found in other Crestron DM products.
In encoder mode, the stream type of the DM-NVX-351 must be set by using the web interface or a control system. The default setting is Pixel Perfect Processing for interoperability with DM NVX 4K60 4:4:4 decoders. For interoperability with a DM-NVX-D10, DM-NVX-D20, or DM-NVX-D200 decoder, the stream type of the DM-NVX-351 encoder must be set to DM-NVX-D10/D20/D200 Series. In addition, the resolution of the encoder must be set so that it does not exceed the maximum resolution of the DM-NVX-D10, DM-NVX-D20, or DM-NVX-D200 decoder.

In decoder mode, the proper stream type of the DM-NVX-351 is automatically used. For interoperability with DM NVX 4K60 4:4:4 encoders, Pixel Perfect Processing is automatically used as the stream type of the DM-NVX-351 decoder. For interoperability with DM-NVX-E10/E20 Series encoders, DM-NVX-E10/E20 Series is automatically used as the stream type of the DM-NVX-351 decoder.
3D formats are not supported.
HDMI connections require an appropriate adapter or interface cable to accommodate a DVI or Dual‑Mode DisplayPort signal. CBL‑HD‑DVI interface cables are available separately.