XHDI

The embedder/deembedder card for audio in HDSDI video signals

With the XHDI card, audio signals can be extracted from an HDSDI digital video stream, replaced and simultaneously embedded again.

The XHDI card is a combined de-embedder and embedder for audio signals in HDSDI and SDI video signals to SMPTE 259M, 292M and 424M/425M. The card supports automatic format detection of the video data streams and is able to read, exchange and embed all 16 embedded audio signals simultaneously. Various modes are available for this: De-Embed, Embed, Replace, Bypass and Delete allow flexible handling of the embedded audio data. The unpacked channels can be used freely in the NEXUS routing matrix. To be able to adjust the levels as soon as you enter the system, a DSP is provided on the module. The image-sound offset that occurs during separate audio-video processing can be compensated by means of delay. A video delay before re-embedding is also possible.

Requantisation can be activated for audio formats with a different word width, such as 20 or 16 bit. Dithering and noise shaping are of course available. When setting up new systems or troubleshooting, an integrated video test pattern generator that supports the various resolutions and frame rates can be used to connect the XHDI with the XDED or XDEE board using a short cable within the NEXUS base unit for practical integration of Dolby E signals.

The metadata contained in the SD/HD data stream can be read and written. They can be received from or output to external devices via the optional XDEM interface card. Even more convenient when using a NEXUS Dolby E card is the connection via the NEXUS network, e.g. to an XTI serial data transfer card. The XHDI board is available in two versions: with four BNC connectors for Video In, Thru and 2x Video Out and alternatively with a bidirectional SFP port, which connects to an LC-duplex fiber with different modules. Optionally, the board can be equipped with sample rate converters to operate the NEXUS system in a different clock to the audio signals from the video source.

Automatic format recognition

The XHDI card supports a variety of SD, HD and 3G formats and recognizes independently which one it is.

Adjustable digital gain in the inputs

The inputs are immediately followed by a digital gain in the range of +/-20dB, which can be adjusted in 1dB steps. In addition, it is possible to reverse the phase for each channel separately.

Adjustable delay for delay compensation compared to the video

To compensate for an image-sound offset that can occur when editing or compressing video, there is an adjustable delay.

Adjustable delay for delay compensation compared to the audio

During extensive processing or routing over long distances, the audio signal may be slightly delayed, so that an adjustable delay restores lip sync.

Integrated test pattern generator

In 425M, 296M, 274M, and 125M SMPTE formats, a color bar or black image can be output for setup and troubleshooting.

Integrated DSP

Dithering is calculated on an integrated DSP to reduce rounding errors during the requesting process. Switchable noise shaping shifts the noise energy to an area to which the human ear is less sensitive.

Optional sample rate converter

An optional sample rate converter module enables the embedding of audio signals that do not comply with the SD standard of 48kHz. On the other hand, audio signals from SD/HD data streams can also be fed into NEXUS systems that operate at other sampling rates such as 96kHz.

XDEM expansion card with serial metadata port optionally available

The XDEM module is not a stand-alone plug-in board but an extension for the NEXUS boards XDED, XDEE, XHDI and XCPU. It provides two additional RS232- or RS422-compliant 9-pin D-Sub interfaces, which can be used to access the metadata ports of these boards. It is a simple, direct solution to pass metadata to or read metadata from these boards when none of the other higher-level solutions available with the NEXUS board are used.

Connections

XHDI_03

BNC	2x	SDI, HDSDI, 3G	Output
BNC	1x	SDI, HDSDI, 3G	Input
SFP	1x	SDI, HDSDI, 3G	bidirectional

Technical specifications

Characteristics

Video data formats compliant w/	SMPTE 259M (270 Mbps), SMPTE 292M (1485/1483.5 Mbps), SMPTE 424M/425M (2970/2967 Mbps), automatic format detection
Embedding and de-embedding	SMPTE 272M-AC (SD), SMPTE 299M (HD/3G)
Audio data	16 / 20 / 24 bit-transparent transmission of compressed audio, Dolby E certified
Sample rates	48 kHz according to SDI44 44.1 kHz, 48 kHz, 88.1 kHz, 96 kHz (NEXUS system clock) with optional sampling rate converter
Input data rate	270 MBit, 1483,51 MBit, 1485 MBit
Note	Due to the high data rate, only high-quality cables with sufficient bandwidth and defined impedance (75 Ohm) should be used.
Interface extension XDEM	optional expansion card for feeding or outputting metadata

Electrical input BNC

Impedance	75 ohm
Return loss	min. 15 dB according to SMPTE 292M
Cable length	max. 300 m at 270 MBit with cable Belden 1694A max. 140 m at 1485 MBit with cable Belden 1694A

Electrical outputs BNC

Impedance	75 ohms
Output voltage	typ. 800 mVPP
Return loss	min. 15 dB according to SMPTE 292M

Input optical LC

Type	Single-Mode SM
Cable length	max. 10 km
Optical sensitivity	-18 dBm (at 9/125 μm)
Max. attenuation	0...8 dB (total attenuation via cables, connectors, switches, connections)

Output optical LC

Type	Single-Mode SM
Cable length	max. 10 km
Wavelength	1270...1360 μm
Optical output	-10...-3 dBm (at 9/125 μm)

Operation conditions

Temperature range	0° C to +50° C
Max humidity	max. 90 %, non-condensing

Storage conditions

Temperature range	–35° C to +70° C
Max humidity	max. 90 %, non-condensing

Power supply

Voltage	+4,75…5,25 V
Currrent	1000 mA (BNC only) 1200 mA (optical and BNC)

Mechanical data

Weight

0,26 kg

NEXUS / NEXUS Star Technical specifications

XHDI Technical specifications

Analogue Audio Components

XAD+

The XAD+ board is designed for connecting analog signal sources with line levels. The board offers eight inputs, is available with different connectors and uses the patented TrueMatch converter for outstanding audio values.

XDA+

The XDA+ board is intended for connecting devices that require an analog line level at the input. The board has eight outputs, is available with different connectors and offers outstanding audio values.

XMICplus

The XMIC+ microphone input board features eight TrueMatch® 32-bit converters, each with a 4-channel active microphone splitter. Each of the channels has separate gain control, adjustable impact sound filters and a phase inverter and works in a permanent self-monitoring and self-calibration.

HXAD

HXAD NEXUS cards offer eight analog stereo line inputs (16 audio channels). Versions with D-Sub or RJ45 connectors are available, which are particularly suitable for applications that require small sizes with high audio quality at the same time.

HXDA

The HXDA board is designed for the output of analog, 2-channel signals with line level. With 16 audio channels on only 4HP, it is suitable for fixed installations requiring a large number of output channels, for example.

Digital Audio Components

HXETR

The small size with a high number of AES3 inputs and outputs makes the HXETR cards ideal for applications where many external devices have to be connected to a NEXUS system via AES/EBU signals in the smallest of spaces. 8 inputs and 8 outputs together make 32 audio channels.

XETR

The XETR AES/EBU boards combine four 2-channel digital inputs and four 2-channel digital outputs on one NEXUS board. Versions with only inputs and outputs are available; versions with XLR or BNC connections offer great structural flexibility.

XDIP

The XDIP card establishes the connection between Dante and NEXUS networks. With four Ethernet ports, it operates as a switch and supports redundant Dante connections.

XDED

The XDED board series is designed as Dolby-E and Dolby-D input board for the NEXUS system. It supports all features provided in the Dolby specifications and supplements them with useful options such as auxiliary sync generation to allow limited operation even if video sync is missing.

XDEE

The XDEE board series is designed as Dolby-E output board for the NEXUS system. It supports all features provided in the Dolby specifications and supplements them with useful options such as auxiliary sync generation to allow limited operation even if video sync is missing.

XER

The XER card is the digital gateway to the NEXUS world by receiving and evaluating AES/EBU data streams. A pragmatic operating concept ensures pleasant handling.

XER-M

The XER-M module is intended for connecting digital microphones.

XET

For individual requirements the card is offered with a variety of connector types: XLR, BNC, Cinch and optical TOSLINK; versions with RJ 45 and D-Sub connectors allow all signal lines to be routed together via the respective connector in an installation-friendly manner.

XAF

With an XAF card it is possible to integrate devices with a Toslink optical port in 8-channel ADAT format into a NEXUS network. The card has an input and an output and processes a total of 16 audio channels.

XMF

The XMF MADI card provides a simple, powerful solution for connecting a NEXUS system to MADI equipment anywhere.

XSDI

With the XSDI card, audio signals can be extracted from a digital SDI video data stream, replaced and simultaneously embedded again.

XHDI

With the XHDI card, audio signals can be extracted from an HDSDI digital video stream, replaced and simultaneously embedded again.

XTF

With the XTF card, Stage Tec provides an I/O card that supports the TASCAM multi-track format. With eight input and eight output audio channels and an optional sample rate converter, the board supports high-quality signal transfer between the NEXUS network and connected TASCAM devices.

XFIP

With the XFIP card it is possible to connect AoIP networks to the NEXUS system.

DSPs- & Controllers Component

System Components

NEXUS Star Components

RCX

The RCX card is the central unit in the NEXUS Star Router. It manages the device and provides the internal matrix with 4,096 x 4,096 crosspoints. External control systems can be connected to the NEXUS network via various interfaces. The RCX card can be redundantly equipped, which is what the safety concept of the NEXUS system is all about.

RFOC

The RFOC card is the counterpart to the XFOC network cards in NEXUS base devices. Standard SFP modules allow the very flexible integration of the Star Router into NEXUS networks of any topology. Due to the high switching capacity of the Star Routers, RFOC cards can be used to form a star point in the network, via which many basic devices can be connected to each other centrally.

RMF

The RMF MADI card is the consistent scaling of the XMF MADI card for NEXUS base devices. As a router card, it allows up to four MADI universes to be integrated into a NEXUS network. The four ports, both BNC and SFP ports for LC-duplex fiber optics, are connected directly to the matrix of the Star Router and can be routed from there system-wide.

RSYNC

The RSYNC board supports special applications that require a larger number of different sync inputs and/or outputs. Among them is a BNC input for video genlock or blackburst, which supports both bi-level and tri-level sync.

RMC

The RMC card is the heart of every AURUS or CRESCENDO mixer. It handles every single operation, manages the mixer projects and controls the entire data exchange between the console interface, the NEXUS network and the DSP cards assigned to the console. Up to two mixing console surfaces can be connected to one RMC card. In addition, there are connections for time code, MIDI and other controls such as RAS.

RMCQ

The RMCQ card is the heart of the new AVATUS IP mixing consoles from Stage Tec. It handles every single operation, manages the mixer projects and controls the entire data exchange between the console interface, the NEXUS network and the DSP cards assigned to the console.

RMDQ

The RMD cards form the scalable DSP of the first generation for Stage Tec's large digital mixing consoles of the AURUS and CRESCENDO families. As development progressed, they were replaced by the RMDQ card generation.

RIF67

With the RIF67 card it is possible to connect up to eight AoIP networks to a NEXUS system. AES67 and Ravenna are supported. The RIF67 cards are available in four versions: with 2, 4, 6 or 8 active ports. A total of 256 audio channels can be output in IP streams. Depending on the expansion level of the board, 8 channels (RIF67-1) down to 2 channels (RIF67-4) can be bundled per stream.

Base Units

Optical Multiplexer

AVATUS	Analogue-Audio-Components
AURUS platinum	Digital-Audio-Components
CRESCENDO platinum	DSPs- & Controllers-Component
AURATUS platinum	System-Components
ON AIR flex	NEXUS Star-Components
	Base Units
	OMUX Optical Multiplexer