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SD-SDI 4 AES Audio Embedder

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The 7720AE4 Audio Embedder inserts AES audio signals into a 270Mb/s SDI video signal as specified in SMPTE ST 272. The companion 7720AD4 Audio Deembedder facilitates audio demultiplexing at the destination.

SMPTE ST 272 allocates four groups of four audio channels that can be embedded into the SMPTE ST 259 bitstream. The 7720AE4 embeds up to 4 AES audio signals into two groups on the SDI outputs for discrete 5.1 audio applications. The 7720AE4 is Dolby E compliant when the sample rate converters are turned off.

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.


  • Automatic detection of 525 line and 625 line input
  • Bypass relay protection on one SDI output for power failures
  • 20-bit AES input and audio embedding
  • Individual audio group assignment for each group
  • Group lock mode maintains phase relationship between the groups for 5.1 audio applications
  • Sample rate conversion disable on AES inputs to permit Dolby E® embedding
  • Programmable audio delays (up to 7 frames in ½ video field increments using DIP switches or up to 1.35 seconds in 1 sample increments with VistaLINK® control
  • Ancillary packet cleaning mode removes all audio before embedding
  • Ancillary packet reformatting mode left justifies and removes unused packets before embedding
  • Embeds audio on internally generated black or blue video when there is no video input
  • 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

Standard SMPTE ST 259-C (270Mb/s) 525 or 625 line component
Number of Inputs 1
Connector BNC per IEC 61169-8 Annex A
Equalization Automatic 210m @ 270Mb/s with Belden 8281 or equivalent cable
Return Loss > 15dB up to 540Mb/s

Serial Video Output

Standard Same as input
Number of Outputs 2 (1 bypass relay protected)
Connector BNC per IEC 61169-8 Annex A
Embedded Audio
Standard SMPTE ST 272
Resolution 20 bits
Sampling Rate 48 KHz synchronous
Signal Level 800mV nominal
DC Offset 0V ±0.5V
Rise/Fall Time 900ps nominal
Overshoot < 10% of amplitude
Return Loss > 15dB up to 270Mb/s
Wideband Jitter < 0.2UI

AES Audio Input

Standard SMPTE ST 276, single ended AES
Number of Inputs 4
Connector BNC per IEC 61169-8 Annex A
Resolution 20 bits
Sampling Rate 32kHz to 96kHz synchronous or asynchronous
48kHz synchronous AES required when sample rate converter is disabled
Impedance 75Ω unbalanced
Level 1V p-p ±0.1V

System Performance

Embedding Latency 1.3ms to 3ms
Audio Delay
DIP Switch Control Up to 7 frames, ½ frame increments (delay applied to all AES channels)
VistaLINK or Serial Port Control Up to 1.35s in 1 sample increments (independent control of delay for each channel)


Voltage +12V DC
Power 9 Watts
EMI/RFI Complies with FCC Part 15 Class A, EU EMC Directive


Number of Slots 1

Ordering Information

7720AE4 SD-SDI 4 AES Audio Embedder

Ordering Options

Notes Rear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+SA Standalone Enclosure Rear Plate
+3RU 3RU rear plate for use with 350FR, 7700FR-C or 7800FR Multiframes


350FR Portable Multiframe which holds 7 single slot modules
7700FR-C 3RU Multiframe which holds 15 single slot modules
7800FR 3RU Multiframe which holds 15 single slot modules
S7701FR 7700 Series Standalone Enclosure


7800FC VistaLINK® Frame Controller
CP-2116E-H System Control Panel, One Touchscreen LCD and 16 LCD Buttons
CP-2232E System Control Panel, 2RU, Two Touchscreen LCDs and 32 LCD Buttons