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HD/SD-SDI Audio Embedder

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The 520AE4-HD Audio Embedder embeds 4 AES channels into 2 specified groups as defined by SMPTE ST 299-1 in a 1.5Gb/s serial HDTV or as defined by SMPTE ST 272 in a 270Mb/s serial SDTV video signal.

Several optional processing steps can be applied to the input audio before it is embedded. If needed, the 4 stereo AES input channels can be processed by 4 on-board sample rate converters (SRC's). The SRC's can be configured to automatically respect Dolby E & Dolby Digital adding to ease of use & flexibility. The 8 discrete audio channels can be re-arranged in any arbitrary manner with on-board 8 x 8 router. The audio channels may be optionally and independantly delayed up to 3 seconds.

This device also handles the Dolby E Metadata. Metadata is optionally embedded in VANC for downstream devices according to SMPTE ST 2020.

The 520AE4-HD is housed in the 3RU 500FR Exponent frame that will hold up to 16 modules.


  • Fast locking AES receivers
  • Configurable or automatic SRC's on AES inputs
  • Headphone jack with monitoring stereo channel
  • Card edge display for status & audio channel peak levels bargraphs
  • Audio channel router (8 x 8)
  • VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 500FR frame with 500FC VistaLINK® Frame Controller
  • Controls

  • Audio group selection
  • Audio channel selection
  • Inputs

  • SMPTE ST 292-1 - (1.5Gb/s), or SMPTE ST 259 (270Mb/s)
  • 4 Channel AES (unbalanced)
  • 1 BNC for Dolby metadata (RS-422/485)
  • Outputs

  • 4 processed HD outputs
  • Program output bypass relay protected
  • 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/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 with bypass relay active
Processed Serial Video Output
Standard Same as input
Number of Outputs 4
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 4
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/Output
Type Dolby E Metadata SMPTE RDD6
Number of Ports 1
Connector BNC per IEC 61169-8 Annex A
Baud Rate 115,200 baud
System Performance
Embedding Latency 600µs nominal
Audio Delay Range 0s to 3s
Voltage +12V DC
Power 10 Watts
EMI/RFI Complies with FCC Part 15 Class A, EU EMC Directive
Number of Slots 1

Ordering Information

520AE4-HD HD/SD Audio Embedder with 4 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