ADX-1881
HD/SD 8 AES De-Embedder

The ADX-1881 is a high-quality AES de-embedder designed to extract eight 24-bit 48 kHz digital audio signals, ancillary timecode (ATC), longitudinal/linear timecode (LTC) and ancillary data from a single SMPTE ST 292 HD-SDI or SMPTE ST 259C SD-SDI signal. The ADX-1881 will output audio silence with a loss of the input signal. The card provides automatic input format detection, as well as automatic equalization. An RS-422 serial data signal output is available to provide Dolby E metadata output, or simply to output a serial RS-422 signal. Two opto-isolated GPI data output signals can be reconstructed from ANC data inserted by the embedder. By combining AMX-1881 embedder and ADX-1881 de-embedder cards, a full duplex link may be established.

  • HD/SD-SDI input with automatic equalization
  • Automatic detection of video input format
  • Two pass-through HD/SD-SDI video outputs
  • 8 AES outputs at 110 ohm balanced or 75 ohm unbalanced, depending on rear panel in use
  • Audio level adjustment, -96 to +12 dB
  • Selectable audio delay of up to 3 frames in 1/2 frame steps
  • 24-bit digital audio de-embedding
  • Built-in audio test tone signal
  • Audio silence output on loss of video input
  • Left/right channels swappable for each AES output
  • Selectable routing of audio groups to AES outputs
  • Co-phased audio outputs
  • Dolby E compatible
  • RS-422 serial data output signal reconstructed from ANC data inserted by the embedder. Output can also be Dolby E or Dolby Digital
  • Metadata embedded in VANC with proprietary DID
  • Linear timecode (LTC) output translated from ancillary timecode (ATC) data or digital vertical interval timecode (DVITC)
  • Two opto-isolated GPI data output signals reconstructed from ANC data inserted by the embedder
  • By combining AMX-1881 embedder and ADX-1881 de-embedder cards, a full duplex link may be established
VIDEO INPUT
  • Video signal: HD/SD-SDI SMPTE ST 292/SMPTE ST 259
  • Embedded audio as per SMPTE ST 299/SMPTE ST 272
  • Embedded ATC/DVITC as per SMPTE RP 188/SMPTE ST 266
  • Cable length: Up to 110/250m (360/820 ft.) of Belden 1694A
  • Return loss: >15 dB, 5 MHz to 1.5 GHz
AUDIO AES3 OUTPUT
  • Signal: AES3
  • Level: 3.0 Vp-p ±10%
  • Impedance: 110Ω balanced
AUDIO AES-3id OUTPUT
  • Signal: AES-3id (SMPTE ST 276)
  • Level: 1.0 Vp-p ±10%
  • Impedance: 75Ω unbalanced
AUDIO AES SIGNAL
  • Sampling rate: 48 kHz synchronous
LTC SIGNAL OUTPUT
  • Signal: Reconstructed LTC from ATC/DVITC
  • Impedance: <55 ohm source, unbalanced 1 kΩ load
  • Level: 1.0 Vp-p
RS-422 SIGNAL OUTPUT
  • Signal: RS-422
  • Serial mode: Reconstruction of signal input to embedder (38,400 or 115,200 Bd)
  • Dolby E/Dolby Digital mode: Dolby Metadata: RS-422, 115.2 kBd
GPI SIGNAL OUTPUT (2)
  • Signal: Opto-isolated, common emitter
  • Forward voltage: 30V max
  • Reverse voltage: 5V max
  • Rate: DC- to 250 Hz
VIDEO OUTPUT (Input active loop through)
  • Propagation delay: 47 ns
  • Signal: HD/SD-SDI SMPTE ST 292/SMPTE ST 259
  • Return loss: >15 dB up to 1.5 GHz
  • Wideband jitter: as per SMPTE ST 292 and SMPTE ST 259-C
PROCESSING PERFORMANCE
  • Signal path: 10-bit video / 24-bit audio
  • Audio latency: 875 μs (combined embedding and extraction*)
  • Audio delay: Up to 3 video frames (1/2 frame steps)
  • ATC/DVITC delay: None, 1, 2 or 3 frames before translation to LTC
  • RS-422 latency: 500 μs max. (combined embedding and extraction *) (1 frame in metadata mode)
  • GPI latency: 4 video lines (combined embedding and extraction*)
  • Test signals: Audio - 1 kHz tone (R steady, L pulsed) -18 dBFS (EBU R49, R68)
  • LTC - 10 s loop starting at 23:59:00:00
ELECTRICAL
  • Power: 9.5W
*Applicable to combinations of AMX-1881 with ADX-1881.
Densité 2 frame Densité 3 frame Description
ADX-1881 ADX-1881-3RU HD/SD 8 AES de-embedder
ADX-1881-75-DRP ADX-1881-75-DRP-3RU Double rear connector panel, 75 ohm
ADX-1881-110-DRP ADX-1881-110-DRP-3RU Double rear connector panel, 110 ohm
 
Options Description
BOC-DE15-4BNC-1 4 AES breakout cable, 75 ohm
NSH15M
HD-15 to terminal block adapter
 
Remote control iControl, iControl Solo, RCP-200

ADX-1881: HD/SD 8 AES De-Eembedder Datasheet

The ADX-1881 from Grass Valley, a Belden Brand, is a high-quality AES de-embedder designed to extract eight 24-bit 48 kHz digital audio signals, ancillary timecode (ATC), longitudinal/linear timecode (LTC) and ancillary data from a single SMPTE ST 292 HD-SDI or SMPTE ST 259-C SD-SDI signal.

The ADX-1881 will output audio silence with a loss of the input signal. The card provides automatic input format detection, as well as automatic equalization. An RS-422 serial data signal output is available to provide Dolby E metadata output, or simply to output a serial RS-422 signal. Two opto-isolated GPI data output signals can be reconstructed from ANC data inserted by the embedder.

Posted Jun 22 2016 (GVB-1-0341D-EN-DS) File Size: 818.8 KB

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