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HD/SD-SDI Audio Embedder

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The 520AE8-HD Audio Embedder embeds 8 AES input signals (16 channels) as 4 groups into a 1.5Gb/s HD video signal (as specified by SMPTE ST 299-1) or into a 270Mb/s serial SD video signal (as defined by SMPTE ST 272).

Several optional processing steps can be applied to the input audio before it is embedded. If needed, the 8 AES input signals can be processed by 8 on board sample-rate converters (SRC's). This processing will automatically detect the Dolby® E / AC3 inputs and bypass the SRC's to maintain the integrity of the non-PCDM audio data. Also, audio channels can be independently rearranged (using on-board 16x16 router) in any desired way before embedding.

The 520AE8-HD module also handles Dolby-E Metadata. The module can optionally embed Metadata in the vertical ancillary data space (VANC) of HD/SD signals for downstream devices according to SMPTE ST 2020.

The 520AE8-HD is housed in the 3RU 500FR Exponent frame that will hold up to 16 modules.


  • Fast locking AES receivers
  • Headphone jack with monitoring stereo channel
  • Card edge display for status & audio channel peak levels bargraphs
  • Dolby-aware SRC (sample rate converters)
  • Flexible audio channel router (16 x 16)
  • VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 500FR frame with 500FC VistaLINK® Frame Controller
  • Controls

  • Audio channel selection
  • Embedded group enable/disable
  • Inputs

  • SMPTE ST 292-1 - (1.5Gb/s serial digital), or SMPTE ST 259
  • 8 Channel AES (unbalanced)
  • Dolby metadata (RS-422/485)
  • Outputs

  • Program output bypass relay protected
  • 1 processed HD output
  • Card Edge LED's

  • Module Status
  • Video Signal presence
  • AES input presence/errors


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/23.98, 720p/24, 720p/50, 720p/60, 720p/59.94, 1035i/60, 1035i/59.94
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 100m @ 1.5Gb/s with Belden 1694 (or equivalent), 25m when bypass relay engaged

Processed Serial Video Output

Standard Same as input or user controlled
Number of Outputs 1
Connector BNC per IEC 61169-8 Annex A
Signal Level 800mV nominal
DC Offset 0V ±0.5V
Rise and Fall Time Per standard
Overshoot < 10% of amplitude
Wideband Jitter < 0.2UI
Metadata Embedded according to SMPTE ST 2020

AES Audio Input

Standard SMPTE ST 276
Number of Inputs 8
Connector BNC per IEC 61169-8 Annex A
Level 0.1V to 2.5V p-p
Impedance 75Ω
Return Loss > 25dB, 100kHz to 6MHz
Equalization Automatic to 1000m with Belden 1694A (or equivalent) @ 48kHz AES signal
Sampling Rate 48kHz ±100ppm

Metadata Input

Type Dolby-E Metadata
Number of Ports 1
Connector BNC per IEC 61169-8 Annex A (adapter to DB9 available)
Baud Rate 115,200 baud

System Performance

Embedding Latency 600µs nominal
3ms (with SRC), 0.2ms (SRC off)


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


Number of Slots 1

Ordering Information

520AE8-HD HD/SD Audio Embedder with 8 unbalanced AES inputs (2 audio groups)


500FR 3RU Exponent Compact High Density Distribution Frame
S501FR 500 Series Standalone Enclosure


500FC VistaLINK® Frame Controller
CP-2116E-H Remote Control Panel
CP-2232E Remote Control Panel