The 520DD-AESU is a professional Dolby audio decoder that automatically detects Dolby-E, Dolby Digital (AC3), and PCM streams in the AES input, and translates them to PCM (linear) audio. Up to 8 discrete audio channels may be contained in 1 AES stream when encoded as Dolby-E, yielding up to 4 AES PCM outputs. A fifth stereo pair is obtained as the downmix of the above multi-channel audio. It can be mono, stereo or surround (ProLogic) and may optionally be routed to the output. So that the multi-channel outputs in PCM form can be re-assembled back into Dolby-E or Dolby Digital further downstream, an additional output with metadata is provided. It contains information about the assumed inter-channel relationships (whether they are 5.1, or 4 stereo pairs, etc.), their expected dialogue levels, etc. Dolby-E is capable of carrying LTC data embedded within its stream. It can be selected as an output, instead of metadata. For lipsync cohesion and ease of editing, Dolby-E data is organized in blocks with lengths matching associated video frame. The decoder will match the beginning of each output block with the start of video, as provided with the genlock input. Additional delay can be dialed up by the user, up to 3 seconds. Reference video frame rate must match that assumed by the Dolby-E stream. An extra AES input is provided that can be configured as a backup channel, in the event the primary is lost, or as a voice-over source. VistaLINK® enables control and configuration capabilities via Simple Network Management Protocol (SNMP). This offers the flexibility to manage the module status monitoring and configuration from SNMP enabled control systems such as Evertz VistaLINK® PRO locally or remotely. The 520DD-AESU is housed in the 3RU 500FR exponent frame that will hold up to 16 modules.
Headphone jack with monitoring stereo down-mix
Secondary AES input with backup contents or voice-over
Card edge display for Dolby decoder status & audio channel peak levels bargraphs
Adjustable audio delay up to 3 seconds, independent for all 8 channels
VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 500FR frame with 500FC VistaLINK® Frame Controller
AES Audio Input - Number of Inputs:
2 (program, backup)
AES Audio Input - Standard:
SMPTE ST 276, unbalanced AES
AES Audio Input - Connectors:
BNC per IEC 61169-8 Annex A
AES Audio Input - Signal Level:
0.1V to 2.5V p-p
AES Audio Input - Equalization:
Automatic to > 1000m with 1V p-p drive and Belden 1694A or equivalent coax cable
AES Audio Input - Resolution:
24 bits
AES Audio Input - Sample Rate:
48kHz; ±100ppm
AES Audio Input - Input Impedance:
75 ?
AES Audio Input - Return Loss:
>25dB, 100kHz to 6.0MHz
AES Audio Outputs - Number of Outputs:
6 (2 reclocked & 4 PCM decodes)
AES Audio Outputs - Standard:
SMPTE ST 276, unbalanced AES
AES Audio Outputs - Connectors:
BNC per IEC 61169-8 Annex A
AES Audio Outputs - Sample Rate:
48 kHz
AES Audio Outputs - Impedance:
75 ? unbalanced
AES Audio Outputs - Return Loss:
>25dB, 100kHz to 6.0MHz
Genlock Input - Type:
NTSC or PAL colour black sync (525 line or 625 line) or HD tri-level
Genlock Input - Connector:
1 BNC per IEC 61169-8 Annex A
Genlock Input - Impedance:
Hi-Z or 75? jumper configurable