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HD/SD 4 AES De-Embedder

The ADX-1842 is a high quality de-embedder designed to extract up to four AES 24-bit 48 kHz digital audio signals from a single HD/SD serial digital video signal. A unique feature is its ability to extract timecode, a serial RS-422 data signal and two GPI status signals from the video signal. The module supports signal presence detection, remote reporting, and local or remote configuration and control, and features a built-in audio tone test signal.


  • HD-SDI or SDI input
  • Auto EQ for up to 110/250m (360/820 ft.)
  • Automatic detection of video input format
  • Two pass-through HD-SDI/SDI video outputs
  • 110Ω balanced or 75Ω unbalanced outputs
  • Selectable audio delay of up to three frames
  • 24-bit digital audio de-embedding
  • Audio silence output on loss of video input
  • Left/right channels swappable
  • Selectable routing of AES
  • Co-phased audio outputs
  • Dolby-E compatible
  • Monitor output for non-PCM signals
  • LTC output translated from ATC data or DVITC
  • RS-422 serial data output
  • Two opto-isolated GPI outputs


HD-SDI formats

  • Resolution 1920 x 1080
    • 59.94i, 50i, 29.97p, 25p, 24p, 23.98p,
      29.97psf, 25psf, 24psf, 23.98psf
  • Resolution 1920 x 1080
    • 59.94p, 50p

SD-SDI formats

  • Resolution 525
    • 59.94i
  • Resolution 625
    • 50i



Video Input
  • Video signal: HD/SD-SDI SMPTE ST 292/SMPTE ST 259-C (see list of supported formats in Key Features section)
  • Embedded audio as per SMPTE ST 299/SMPTE ST 272
  • Embedded ATC/DVITC as per SMPTE RP 188/SMPTE ST 266
  • Embedded RS-422 and GPI as per SMPTE ST 291 (with proprietary Type-1 DID)
  • Cable length: up to 110/250m (360/820 ft.) of Belden 1694A
  • Return loss: >15 dB up to 1.5 GHz


Audio AES-3id Output
  • Signal: AES-3id (SMPTE ST 276)
  • Level: 1.0 Vp-p ±10 %
  • Impedance: 75Ω unbalanced
Audio AES3 Output
  • Signal: AES3
  • Level: 3.0 Vp-p ±10 %
  • Impedance: 110Ω balanced
Audio AES Signal
  • Sampling rate: 48 kHz synchronous
LTC Signal Output
  • Signal: Reconstructed LTC from ATC/DVITC
  • Impedance: <55Ω source, unbalanced 1 kΩ load
  • Level: 1.0 Vp-p
RS-422 Signal Output
  • Signal: RS-422
  • Rate: Reconstruction of signal input to embedder (38,400 or 115,200 Bd)
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)
  • Video signal: HD/SD-SDI SMPTE ST 292/SMPTE ST 259-C
  • Return loss: >15 dB up to 1.5 GHz
  • Wideband jitter: As per SMPTE ST 259-C and SMPTE ST 292


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*)
  • 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: 10s loop starting at 23:59:00:00
  • Power: 9.5W

*Applicable to combinations of this card.


Densité 2 frame Densité 3 frame Description
ADX-1842 ADX-1842-3RU HD/SD 4 AES de-embedder
ADX-1842-75-DRP ADX-1842-75-DRP-3RU Double rear connector panel, 75Ω
ADX-1842-110-DRP ADX-1842-110-DRP-3RU Double rear connector panel, 110Ω
Remote control GV Orbit, iControl, iControl Solo



ADX-1842: HD/SD 4 AES De-Embedder Datasheet

The ADX-1842 from Grass Valley is a high quality de-embedder designed to extract up to four AES 24-bit 48 kHz digital audio signals from a single HD/SD serial digital video signal. 



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