RSYNC

The router card with support for Video Bi-Level and Tri-Level-Sync

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.

RSYNC
The RSYNC board is designed to synchronize a NEXUS network with various external systems. Since a NEXUS system can generally synchronize to any digital audio input, the RSYNC card is particularly useful if separate clock lines are used. The various synchronous inputs support video genlock, black burst, word clock and AES/EBU signals. With video sync, both bi-level and tri-level sync are automatically detected.

The AES/EBU connectors provide both 75 Ohm BNC sockets and 110 Ohm balanced lines accessible via D-Sub connectors. The card recognizes the occupancy automatically.

All connectors have switchable composite filters for noise suppression and the incoming clock information can serve as a synchronous source for the entire NEXUS network. To ensure continuous operation even in the event of a source failure, a sync hierarchy can be created so that in the event of interruption or excessive inaccuracies of the current synchronous clock, the system fades over to the next available source. If no other input is selected, the very accurate NEXUS internal clock generator is used. A key quality criterion in NEXUS networks is that external clock sources are always re-clocked by the internal clock generator, which gently fades over to the next clock in the event of a switchover or failure of a sync source, so that there are never dropouts or crackles in the audio.

In conjunction with a cleverly defined sync hierarchy, the board offers a wide range of connection options that ensure that the NEXUS system synchronizes itself to the current application, stabilizes this sync and passes it on to other systems.

Inputs for word clock and video sync

The NEXUS network can be synchronized via the RSYNC card using word clock or video sync signals; dedicated inputs are provided for this purpose.

Automatic detection of the video format

When a video sync signal is connected, the RSYNC module automatically recognizes which format is present.

Support of Bi- and Tri-Level-Sync

The video input accepts a selection of different signals, such as composite, component. In addition, modern tri-level sync signals can also be used for synchronization.

Configuration option for 75 and 500 Ohm

To enable the serial connection of several loads to a word clock source, the input impedance can be adjusted from 75 to 500 ohms by jumper.

Synchronization to AES/EBU signals

In addition to the BNC connectors, there is a 15-pin Sub-D connector on the front panel for connecting AES/EBU signals. The audio signal is not evaluated by the RCX.

Connections

RSYNC_1 1 x 4TE
BNC 1x Bi- und Tri-Level Sync Input
BNC 1x Wordclock Output
BNC 1x Wordclock Input
BNC 1x AES/EBU Output
BNC 1x AES/EBU Input
D-Sub 15 socked female 1x AES/EBU bidirectional

Technical specifications

Features

Inputs video, wordclock, and AES/EBU
Outputs Word Clock and AES/EBU

Video input

Characteristic galvanic isolation
Sensitivity 1 V nom. (0.5…2 VPP)
Impedance 75 ohm
Required stability < ±100 ppm (typ. ±50 ppm, AES 11, Grade 2 compliant)
SD formats (NTSC, PAL) 525 lines interlaced, 59,94/60 Hz (NTSC)
525 lines progressive, 59,94/60 Hz (NTSC)
625 lines interlaced, 50 Hz (PAL)
625 lines progressive, 50 Hz (PAL)
HD formats (SMPTE 296M) 720 lines progressive, 50, 59.94 and 60 Hz
HD formats (SMPTE 274M, SMPTE 260M) 1035 lines interlaced, 59,94/60 Hz
1080 lines interlaced, 50, 59,94 und 60 Hz
1080 lines progressive, 23,98, 24, 25, 29,97, 30, 50, 59,94, 60 Hz

Wordclock in

Characteristic balanced, electrically separated
Sensitivity TTL, 1…5 V
Impedance 75/500 ohm (jumper-configurable)
Sample Rates 44,1 kHz, 48 kHz, 88,2 kHz, 96 kHz
Required stability < ±150 ppm (typ. ±50 ppm, AES 11, Grade 2 compliant)

Wordclock out

Characteristic balanced, electrically separated
AC/DC-coupled jumper-configurable
Level 2.4 V on RL = 75 ohm
Impedance 75 ohm
Sample rates 44,1 kHz, 48 kHz, 88,2 kHz, 96 kHz
NEXUS frequency stability min. ±10 ppm, typ. ±5 ppm (when using internal generator)

AES/EBU input

Characteristic balanced, electrically separated
Ground connection configurable on D-Sub port
Input voltage ±0,2…7 V
Impedance 75 ohm (BNC), 110 ohm (D-Sub)
Sample rates 44,1 kHz, 48 kHz, 88,2 kHz, 96 kHz
Required stability < ±150 ppm (typ. ±50 ppm, AES 11, Grade 2 compliant)

AES/EBU output

Characteristic balanced, electrically separated
Ground connection configurable for D-Sub connectors
Impedance 75 ohm (BNC), 110 ohm (D-Sub)
Level 1 VPP nom. on RL = 75 ohm (BNC output), > 2 VPP on RL = 110 ohm (D-Sub out)
Sample rate 44,1 kHz, 48 kHz, 88,2 kHz, 96 kHz
Frequency stability min. ±10 ppm, typ. ±5 ppm (when using internal generator)

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 ca. 0,4 A

Mechanical data

Weight 0,43 kg

NEXUS / NEXUS Star Technical specifications

PDF 1

 

 

RSYNC Technical specifications

PDF 1