Klark Teknik DN9652 1U Dual Digital Audio Network Bridge

• Converts between AES50 and MADI, Audinate Dante, Cirrus Logic CobraNet and Digigram EtherSound
• Asynchronous sample rate conversion on every channel with bypass facility
• Bidirectional output audio clock inhibit feature for redundant network systems
• 24 bit audio operation with 96 kHz and 48 kHz sample rates
• Video synchronisation in PAL/SECAM/NTSC formats in standard and high definition
• Internal "AES Grade 1" temperature-compensated word clock (1 ppm)
• Internal web server allows browser-based configuration via Ethernet control port
• Status indicator LEDs and LCD display on front panel
• Features Neutrik etherCON network ports
• Rugged 1U rackmount chassis for durability in portable applications
• Designed and engineered in England• Auto-ranging universal switch-mode power supply PJWx4141NI

There are many different multichannel digital audio protocols available today. Some are well established and have been in common use for several years, others have appeared recently and all are vying for recognition and market share. Interfacing different protocols can be difficult and expensive, often requiring the use of inflexible, proprietary hardware. Connecting different audio networks together, which often have differing sample rates and clock domains can be a difficult and expensive process. The DN9652 Dual Network Bridge has been designed to allow two dissimilar digital audio networks to interface simply and reliably.

Currently available interfaces include:

• Audinate Dante
• Cirrus Logic CobraNet
• Digigram EtherSound
• MADI (AES10)

The DN9652 Dual Network Bridge supports network modules designed and manufactured by Cirrus Logic, Inc., Lab x Technologies, LLC and Audinate Pty Ltd.

Clock Synchronisation
The DN9652 clock synchronisation scheme is divided into two domains (A & B) for each of the two network module interfaces.

Each Network Clock Domain may select from:

• AES50 External Network Clock
• External Network Clock with Word Clock In Synchronisation
• Word Clock Input
• Video Black Burst Input
• External Network Clock
• DN9652 Onboard Oscillator
• Clock selection from other Network Module
• Word Clock In
• Video Black Burst In

DN9652 Architect's & Engineer's Specification
The Dual Network Bridge shall provide bidirectional asynchronous sample rate conversion of up to seventy-two (72) simultaneous channels of 24-bit resolution digital audio, between two third party network module interfaces in a standard 1U high 19" rack mount chassis.

The Dual Network Bridge shall have one (1) Ethernet Control Port for the purposes of remote configuration from a computer web browser interface and the updating of internal software.The Dual Network Bridge shall have two clock domains (identified as A & B), one for each third Party Network, separated by an Asynchronous Sample Rate Converter (ASRC). The Sample Rate Converter shall have a Bypass option with the facility to lock one of the clock domains to the other.

Each Network Clock domain shall support clock synchronisation to incoming clock via third party network module, Word Clock Input or Video Black Burst Input which shall support incoming video synchronisation signals in PAL/ SECAM/NTSC formats in Standard Definition (SD) and High Definition (HD) resolutions, as well as optionally slaving to the other clock domain if the Sample Rate Converter is bypassed.

The Word Clock Output shall be capable of being derived from either clock domain or the Word Clock Input.The Dual Network Bridge shall have a precision clock reference provided by a temperature-controlled crystal oscillator (TCXO) with 1 part-per-million (1 ppm) stability.

The Dual Network Bridge shall have user-selectable functions for both clock domains to stop an output clock if the corresponding input clock fails, to propagate network failures across the ASRC for the purposes of automatic or manual redundancy switchover.The Dual Network Bridge shall support data format word length truncation and dithering on data received and transmitted via the third party network module interfaces.The unit shall be capable of operating from a 100 to 240V +/-10%, 50 to 60Hz AC power source.