XETR

The Universal AES/EBU Input-Output Boards for the NEXUS Matrix

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.

XETR series cards offer four 2-channel AES/EBU inputs and outputs, each with its own sampling rate converter. NEXUS networks support the transparent transmission of AES additional data (CUVZ) over the network, allowing the inputs and outputs of XETR cards to be used to connect AES intercom systems or for other purposes.

Furthermore, the combination of AES/EBU inputs and outputs on one board allows an input clock that is asynchronous to the NEXUS system to be passed through unchanged to the corresponding output, while the input's sample rate converter only adapts the clock to the system clock on the NEXUS side. Of course, the entire NEXUS network can also synchronize its system clock to each of the inputs.

XETR cards are available with XLR or BNC connectors. Inputs and outputs are arranged on separate front panels and can be placed separately within a Base Device. It is also possible to operate only inputs or outputs.

Available with XLR or BNC Connectors

This module can optionally be supplied with different front panels, the electrical conversion remains the same. The XLR versions are available for balanced lines and BNC for unbalanced cabling as well as a 4HP wide front panel. (When using both the transmit and receive functions, a second front panel is used in both versions, which is connected to the circuit board via a ribbon cable.

Support of S/P-DIF Signals

Since the professional AES/EBU signal and the consumer format S/PDIF differ only in the electrical level, the XETR cards offer the possibility to select the type of input or output in the settings. In this way, both formats can be received and transmitted.

Adjustable Digital Gain in Inputs and Outputs

For input signals with known understeering, the level can be digitally amplified by 20 dB. A reduction is also possible. A switchable limiter protects against overload.

Sampling Rate Converters in all Inputs and Outputs

The sample rate converters in the inputs can be switched on manually or operated in auto mode; the board automatically detects whether the incoming frequency corresponds to the NEXUS system clock. A sampling rate of 44.1/48 kHz; 88.2/96 kHz or 176.4/192 kHz can be set for each output. In addition, the outputs can also be synchronized to the paired input of the same module.

Transparent Transmission of Additional Data in the AES3 Data Stream

The NEXUS network is able to transparently transmit an AES3 data stream including the additional data. If no data is available in transparent mode, NEXUS internal data is output. If additional data is transmitted on only one channel, it is transmitted to the other channel.

Connections

Variant: XLR

1 x 8TE

XLR female

AES/EBU, S/PDIF

Input

Variant: BNC

1 x 4TE

BNC

AES/EBU, S/PDIF

Input

Variant: XLR

1 x 8TE

XLR male

AES/EBU, S/PDIF

Output

Variant: BNC

1 x 4TE

BNC

AES/EBU, S/PDIF

Output

Technical Specifications

Formats

Audio data	AES/EBU professional and consumer formats compliant with AES 3-1992r (1997), IEC 60958, EIAJCP-1201, and AES 11-1997
Non-audio	The card transparently passes non-audio data through.
Audio data	24-bit (with or without SRC)
Ancillary data	Evaluation and transparent passthrough of AES/EBU ancillary data (CUVZ)

Audio Data

Sample rates	NEXUS system clock (44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz);2…192 kHz with sample-rate converter enabled
Latency	7/8 Samples (48/96 kHz); 1,2…2,4 ms (2 SRCs in chain)

Configuration

	Sample-rate converters for each input and output
	Gain (mute…+20 dB) and phase inversion per input
	Gain (mute…+20 dB) per output

Inputs

Diff. input sensitivity	150 mV (min.)
Impedance	110 ohm
Recommended cable length	100 m (max.)

Outputs

Diff. output voltage	3,3 V
Impedance	110 ohm
Recommended cable length	100 m (max.)

Sample Rate Converter

	Separately available for each input and output port
Output frequency	Synchronization of the out rate to the rate present at the input Free-running (controlled by internal quartz oscillator), 44.1/48 kHz, 88.2/96 kHz, 176.4/192 kHz
Distortion factor (THD+N)	–130 dB (typ.), –115 dB (max.)
Latency	1.2 ms at 48 kHz (SRC output frequency) 0.6 ms at 96 kHz (SRC output frequency) 0.3 ms at 192 kHz (SRC output frequency)
Sample rates	30…200 kHz (32…192 kHz guaranteed)

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	typ. +5 V
Currrent	220 mA, no active inputs/outputs 240 mA, at 48 kHz, 4 active AES inputs, SRCs off 400 mA, at 48 kHz, 4 active AES inputs, SRCs (In and Out) on 270 mA, at 96 kHz, 4 active AES inputs, SRCs off 440 mA, at 96 kHz, 4 active AES inputs, SRCs (In and Out) on 500 mA, at 192 kHz, 4 active AES inputs, SRCs (In and Out) on 20 mA, per active SRC

Mechanical Data

Weight	0,25 kg
Note	In the XLR version, the two front panels are connected with a ribbon cable.

NEXUS / NEXUS Star Technical Specifications

XETR 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

XFIP

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

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.

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.

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.

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.

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

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.

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.

DSPs- & Controllers Component

System Components

NEXUS Star Components

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.

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.

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.

Base Devices

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