The 7821AE8-3G Audio Embedder inserts up to 8 AES audio signals, on up to 4 groups, into a SMPTE 424M (3Gb/s), ST 292-1 (1.5Gb/s HD-SDI) or SMPTE 259M (270Mb/s SD-SDI) video signal as specified in ST 299-1 or 272M respectively. The companion 7821AD8-3G Audio De-embedder facilitates audio demultiplexing at the destination.

The 7821AE8-3G supports 24-bit AES audio embedding for 3G/HD-SDI and 20-bit audio embedding into SD-SDI with fully compliant sample rate converters that automatically can be disabled when embedding Dolby streams.

Additionally, a full 16x16 audio channel router is available for channel mixing and/or shuffling. With the -AESD suffix applied (7821AE8-3G-AESD), the rear plate comes equipped with DIN connectors for direct AES connections, eliminating the use of a breakout cable. The 7821AE8-LTC-3G will embed Linear Time Code (LTC) as Ancillary Time Code (ATC) in 3Gbs/HD and DVITC in SD.

VistaLINK® enables control and configuration capabilities via Simple Network Management Protocol (SNMP). This offers the flexibility to manage the module status monitoring and configuration locally or remotely.

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  • Audio embedding into a 3G/HD/SD-SDI video signal
  • Automatic detection of input video standard
  • Four serial video outputs (same standard as input)
  • By-pass relay protection for main program output
  • Supports 24-bit AES audio embedding for 3G/HD-SDI and 20-bit AES audio embedding for SD-SDI
  • Flexible 16x16 audio channel routing for channel shuffling and mixing
  • Dolby compliant with automatic sample rate conversion disable on AES inputs to permit seamless Dolby embedding
  • Dolby® Metadata insertion via serial interface (not available on 7821AE8-B-3G)
  • LTC embedding (7821AE8-LTC-3G only)
  • Card edge LEDs indicate video and audio signal presence and module fault
  • VistaLINK® capable for remote monitoring, control and configuration capabilities via SNMP; using VistaLINK® PRO, CP-2116E or CP-2232E Control Panels. VistaLINK® is available when modules are used with the 3RU 7800FR frame and a 7800FC VistaLINK® Frame Controller module in slot 1 of the frame


Serial Video Input
Number of Inputs1
StandardSMPTE 424M (3Gb/s) 1080p
ST 292-1 (1.5Gb/s), 1080i, 1035i, 720p
SMPTE 259M (270Mb/s) 525i, 625i
ConnectorBNC per IEC 61169-8 Annex A
Input Equalization
3GAutomatic to 80m @ 3Gb/s with Belden 1694A or equivalent cable
HD-SDIAutomatic to 115m @ 1.5Gb/s with Belden 1694A or equivalent cable
SD-SDIAutomatic to 300m @ 270Mb/s with Belden 1694A or equivalent cable
Return Loss
3G> 10dB up to 3.0GHz
HD> 13dB up to 1.5GHz
SD> 15dB up to 270MHz
Serial Video Outputs
Number of Outputs4 (1 output bypass relay protected)
2 (1 output bypass relay protected on -AESD model and -B model)
StandardSame as input
Embedded AudioST 299-1 - 24-bit 48kHz synchronous SMPTE 272M - 20-bit
ConnectorsBNC per IEC 61169-8 Annex A
Wideband Jitter< 0.20UI HD, < 0.30UI 3G
AES Audio Inputs
Number of Inputs8 AES inputs
StandardSMPTE 276M, single-ended AES
ConnectorBNC per IEC 61169-8 Annex A (with DB15 to BNC 6ft Breakout cable)
8x miniDIN connectors (-AESD model)
Terminal block (-B model)
Resolution24 bits
Sampling Rate48kHz synchronous or asynchronous (48kHz synchronous AES required when sample rate converter is disabled)
Impedance75Ω unbalanced, 110Ω balanced (-B model)
Signal Level1V p-p ±0.1V @ termination load
Metadata InputNot available on -B model
TypeDolby-E® Metadata
Baud Rate115,200 baud
ConnectorDB15 breakout connector
Terminal block (-AESD model)
LTC InputOnly available on -LTC model
StandardSMPTE ST 12 LTC
ConnectorDB15 breakout connector
Termination75Ω unbalanced
Input Level0.2 to 4V p-p unbalanced
System Performance
Embedding Latency
3G/HD-SDIapprox. 0.3ms
SD-SDIapprox. 0.7ms
Voltage+12V DC
Power15 watts
EMI/RFIComplies with FCC Part 15, Class A EU EMC Directive
Number of Slots

Ordering Information

NotesRequires 7800FC for full module control
7821AE8-3G3G/HD/SD-SDI 8 AES Audio Embedder with Dolby Metadata Inserter
7821AE8-3G-AESD3G/HD/SD-SDI 8 AES Audio Embedder with Dolby Metadata Inserter
7821AE8-B-3G3G/HD/SD-SDI 8 AES Audio Embedder
7821AE8-LTC-3G3G/HD/SD-SDI 8 AES Audio Embedder with Dolby Metadata Inserter and LTC Embedder
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+3RU3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes
350FRPortable Multiframe which holds 7 single slot modules
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7801FR1RU Multiframe which holds 4 single slot modules
7800FCVistaLINK® Frame Controller
CP-2116E-HRemote Control Panel
CP-2232ERemote Control Panel