Skip to Main Content

7721AD4-HD, 7721AD-A4-HD, 7721AD-A4-2HD & 7721AD4-B-HD

HD-SDI AES Audio De-embedder

Interact with this product in a Layout Tool:

The 7721AD-HD series Audio De-embedders extract embedded audio as specified by SMPTE ST 299-1 from a 1.5Gb/s serial HDTV video signal. The companion 7721AE4-HD Audio Embedder facilitates audio multiplexing at the source. The 7721AD-HD is available in 4 different versions.

SMPTE ST 299-1 allows for up to four groups (4 channels/group) to be embedded within a serial digital signal. The 7721AD4-HD can de-embed two audio groups onto four unbalanced AES outputs. The 7721AD-A4-HD can de-embed one audio group onto two unbalanced AES outputs and 4 balanced analog audio outputs. The 7721AD-A4-2HD can de-embed one audio group onto 4 balanced analog audio outputs.


  • Automatic detection of video input format
  • Card edge LEDs indicating module status, video presence, selected audio group data is present
  • LED indication for the presence of each of the four audio groups within the input video
  • Audio group selection via card edge DIP switches
  • 7721AD-A4-HD and 7721AD-A4-2HD have independent volume controls for each of the audio channel outputs and supports both HD and SD-SDI signals
  • 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

Output Organization

ModelAudio OutputsVideo 1.5Gb/s
Reclocked Outputs
7721AD4-HD (HD Only)4-2
7721AD-A4-HD (HD/SD)24-
7721AD-A4-2HD (HD/SD)-42
7721AD4-B-HD (HD Only)4-2


Serial Video Input

Standard SMPTE ST 292-1 (1080i/60, 1080i/59.94, 1080i/50, 1080p/30(sF), 1080p/29.97(sF), 1080p/25(sF), 1080/24(sF), 1080/23.98(sF), 720p/60, 720p/59.94, 1035i/60, 1035i/59.94)
SMPTE ST 259 (525i, 625i) on 7721AD-A4-HD only
Number of Inputs 1
Connector BNC per IEC 61169-8 Annex A
Equalization Automatic 100m @ 1.5Gb/s with Belden 1694A (or equivalent)
Return Loss > 10dB up to 1.5Gb/s

Serial Video Output

7721AD4-HD, 7721AD-A4-2HD and 7721AD4-B-HD
Standard Same as input
Number of Outputs 2
Connector BNC per IEC 61169-8 Annex A
Signal Level 800mV nominal
DC Offset 0V ±0.5V
Rise/Fall Time 200ps nominal
Overshoot < 10% of amplitude
Return Loss > 10dB up to 1.5Gb/s
Wideband Jitter < 0.2UI

AES Audio Output

7721AD4-HD, 7721AD-A4-HD and 7721AD4-B-HD
Standard SMPTE ST 276, single ended synchronous or asynchronous AES
Number of Outputs
7721AD4-HD 4
7721AD-A4-HD 2
7721AD4-B-HD 4
Connector BNC per IEC 61169-8 Annex A
Sampling Rate 48KHz
Impedance 75Ω
Resolution 24 bits

Analog Audio Output

7721AD-A4-HD and 7721AD-A4-2HD Modules
Number of Outputs 4
Type Balanced analog audio
Connector Two 6 pin terminal strips
Impedance 66Ω balanced
Sampling Rate 48KHz
Signal Level 0dB FS => 8 to 24dBu into 10kΩ load (user settable)
0dB FS => 8 to 22dBu into 600Ω load (user settable)
Frequency Response < ±0.1dB (20Hz to 20kHz)
Dynamic Range 24 bit
THD+N > 90dB RMS @ 1kHz with 24dBu output
Crosstalk > 90dB RMS (20Hz to 20kHz)


Voltage +12V DC
Power 8 Watts
EMI/RFI Complies with FCC Part 15 Class A, EU EMC Directive


Number of Slots 1

Ordering Information

7721AD-A4-HD HD/SD-SDI Audio De-embedder with 2 unbalanced AES and 4 analog audio outputs
7721AD-A4-2HD HD/SD-SDI Audio De-embedder with 4 analog audio outputs
7721AD4-HD HD-SDI Audio De-embedder with 4 unbalanced AES outputs (2 audio groups)
7721AD4-B-HD HD-SDI Audio De-embedder with 4 balanced AES outputs (2 audio groups)

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, 7800FR or 7801FR 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
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
S7701FR 7700 Series Standalone Enclosure


7800FC VistaLINK® Frame Controller
CP-2116E-H Remote Control Panel
CP-2232E Remote Control Panel