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The 7721AE-A4 Analog Audio Embedder performs A/D conversion on 4 balanced pairs of analog audio (as one audio group) and embeds them into a 270Mb/s serial SD input video signal as specified by SMPTE ST 272. The companion 7720AD-A4 Audio De-embedder facilitates audio de-multiplexing at the destination.

The 7721AE-A4 occupies one card slot and can be housed in the 1RU 7801FR frame which holds up to four single or two dual slot modules, the 3RU 7800FR frame which has a 15 slot capacity, the portable 3RU 350FR frame which has a 7 slot capacity, or a standalone enclosure which holds a single module.

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.


  • Automatic detection of video input format
  • Supports 270Mb/s SD per SMPTE ST 259-C, and SDTi per SMPTE ST 305
  • Programmable audio delays (up to 5 frames or 84 milliseconds)
  • Selectable ancillary packet cleaning mode removes all audio before embedding
  • Individual audio channel assignment for embedded audio group
  • Audio mixer per audio channel to provide voice-over
  • Upstream embedded Dolby E compatible (passed through)
  • Monitoring headphone jack for audio input and embedded audio output
  • Comprehensive signal and card status monitoring via four-character card-edge display and LEDs
  • VistaLINK® capable for remote monitoring and control via SNMP (using VistaLINK® PRO) when installed in 7800FR frame with a 7800FC VistaLINK® Frame Controller


Serial Video Input

Standard Auto detect
270Mb/s SMPTE ST 259-C, 525 or 625 line component
SMPTE ST 305, (SDTi)
Number of Inputs 1
Connector BNC per IEC 61169-8 Annex A
Equalization Automatic to 300m @ 270Mb/s with Belden 1694 or equivalent cable
Return Loss > 15dB up to 270Mb/s

Serial Video Output

Number of Outputs 1 Reclocked Loopback
2 same as input with embedded audio
Connector BNC per IEC 61169-8 Annex A
Signal Level 800mV nominal
DC Offset 0V ± 0.5V
Rise and Fall Time 900ps nominal
Overshoot < 10% of amplitude
Return Loss > 15dB at 270Mb/s
Wide Band Jitter < 0.2UI

Analog Audio Inputs

Number of Inputs 4
Type Balanced analog audio
Connector 12 pin removable terminal block
Impedance High Impedance (> 20kΩ)
Frequency Response ±0.1dB, 20Hz to 20kHz
THD < 0.005%, 20Hz - 20kHz
Channel Phase Diff. ±1°
SNR > 85dB with input @ 24dBu (nominal) (weighted)
Max. Audio Input Level +24dBu
Signal Quantization 20 bits


Voltage +12V DC
Power 10 Watts
EMI/RFI Complies with FCC Part 15, Class A
EU EMC directive


Number of slots 1

Ordering Information

7721AE‑A4 SD-SDI Analog Audio Embedder

Ordering Options

Notes 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