The 7720AD4 series Audio De-Embedders extract embedded audio as specified by SMPTE ST 272 from a 270Mb/s serial digital video signal. The companion 7720AE4 Audio Embedder facilitates audio multiplexing at the source. The 7720AD4 is available in 4 different versions.

SMPTE ST 272 allows for up to four groups (4 channels/group) to be embedded within a serial digital signal. The 7720AD4 can de-embed two audio groups onto four unbalanced AES outputs. The 7720AD4-B can de-embed two audio groups onto four balanced AES outputs. The 7720AD-A4-2 can de-embed one audio group onto two unbalanced AES outputs and 4 balanced analog audio outputs.


  • Card edge LEDs indicating module status, video presence, selected audio group data is present
  • LED indication for the presence of each of the 4 audio groups within the input video
  • Audio group selection via card edge DIP switches
  • Audio channel swapping selection via card edge DIP switches (not on 7720AD-A4-2)
  • Analog audio output models have independent volume controls for each of the audio channel outputs
  • 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 270Mb/s SDI
Reclocked Outputs
7720AD44 Unbalanced2Yes
7720AD4-B4 Balanced1Yes

Download Datasheet


Serial Video Input
StandardSMPTE ST 259-C -525 & 625 component
Connector1 BNC per IEC 61169-8 Annex A
EqualizationAutomatic 300m @ 270MB/s with Belden 8281 or equivalent cable
Return Loss> 13dB up to 270MB/s
Reclocked Serial Video Outputs
StandardSame as input
Number of Outputs1 on 7720AD4-B, 2 on 7720AD4 and 7720AD-A4-2
ConnectorsBNC per IEC 61169-8 Annex A
Signal Level800mV nominal
DC Offset0V ±0.5V
Rise And Fall Time700ps nominal
Overshoot< 10% of amplitude
Wide Band Jitter< 0.2UI
Unbalanced AES Audio OutputsNot on -B versions
StandardSMPTE 276M, single ended synchronous AES
Number of Outputs4 on 7720AD4
ConnectorsBNC per IEC 61169-8 Annex A
Sampling Rate48kHz
Impedance75Ω unbalanced
Dynamic Range20-bit
Balanced AES Audio Outputs-B versions only
Number of Outputs4 on 7720AD4-B
ConnectorTerminal strip
Sampling Rate48kHz
Impedance110Ω balanced
Dynamic Range20-bit
Analog Audio OutputsA4 Versions Only
Number of Outputs4
TypeBalanced analog audio
ConnectorTerminal strip
Output Impedance66Ω balanced
Sampling Frequency48kHz
Signal Level0dB FS => 8 to 24dBu into 10kΩ loads (user settable)
0dB FS => 8 to 22dBu into 600Ω loads (user settable)
Frequency Response< ±0.1dB (20Hz to 20kHz)
THD+N> 90dB RMS @ 1kHz, with 24dBu output
> 100dB RMS @ 20Hz to 20kHz, with 24dBu output
Crosstalk Isolation> 100dB RMS (20Hz to 20kHz)
Voltage+12V DC
Power12 watts
EMI/RFIComplies with FCC Part 15, Class A
EU EMC Directive
Number of Slots1

Ordering Information

7720AD-A4-2SD-SDI AES Audio De-embedder with 4 balanced analog audio outputs
7720AD4SD-SDI AES Audio De-embedder with 4 unbalanced AES outputs (2 audio groups)
7720AD4-BSD-SDI AES Audio De-embedder with 4 balanced AES outputs (2 audio groups)
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+1RU1RU rear plate for use with 7701FR Multiframe
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C or 7800FR 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
7701FR1RU Multiframe which holds 3 single slot modules
S7701FR7700 Series Standalone Enclosure
7800FCVistaLINK® Frame Controller
CP-2116E-HRemote Control Panel
CP-2232ERemote Control Panel