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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 非平衡2Yes
7720AD4-B4 平衡1Yes



标准 SMPTE ST 259-C -525 & 625 component
端口数目 1 BNC per IEC 61169-8 Annex A
均衡 Automatic 300m @ 270MB/s with Belden 8281 or equivalent cable
反射损失 > 13dB up to 270MB/s

Reclocked Serial Video Outputs

标准 Same as input
输出数量 1 on 7720AD4-B, 2 on 7720AD4 and 7720AD-A4-2
Connectors BNC per IEC 61169-8 Annex A
信号电平 800mV nominal
直流偏置 0V ±0.5V
Rise And Fall Time 700ps nominal
过冲 < 10% of amplitude
Wide Band Jitter < 0.2UI

非平衡 AES Audio Outputs

Not on -B versions
标准 SMPTE 276M, single ended synchronous AES
输出数量 4 on 7720AD4
Connectors BNC per IEC 61169-8 Annex A
Sampling Rate 48kHz
阻抗 75Ω unbalanced
Dynamic Range 20-bit

平衡 AES Audio Outputs

-B versions only
标准 AES3-1992
输出数量 4 on 7720AD4-B
端口数目 Terminal strip
Sampling Rate 48kHz
阻抗 110Ω balanced
Dynamic Range 20-bit

Analog Audio Outputs

A4 Versions Only
输出数量 4
Type 平衡 analog audio
端口数目 Terminal strip
Output Impedance 66Ω balanced
Sampling Frequency 48kHz
信号电平 0dB FS => 8 to 24dBu into 10kΩ loads (user settable)
0dB FS => 8 to 22dBu into 600Ω loads (user settable)
频率响应 < ±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)


电压 +12V DC
功率 12 watts
EMI/RFI Complies with FCC Part 15, Class A
EU EMC Directive


插槽数 1


7720AD‑A4‑2 SD-SDI AES Audio De-embedder with 4 balanced analog audio outputs
7720AD4 SD-SDI AES Audio De-embedder with 4 unbalanced AES outputs (2 audio groups)
7720AD4‑B SD-SDI AES Audio De-embedder with 4 balanced AES outputs (2 audio groups)


注意 Rear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+1RU 1RU rear plate for use with 7701FR Multiframe
+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
7701FR 1RU Multiframe which holds 3 single slot modules
S7701FR 7700 Series Standalone Enclosure


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