AMX-1881
HD/SD 8 AES Embedder

The AMX-1881 is a high-quality interface which embeds up to eight AES 24-bit 48 kHz digital audio signals into a single HD/SD serial digital video signal. The module offers audio and video signal presence detection and reporting, and local or remote configuration and control. A unique feature is its ability to embed timecode, a serial RS-422 data signal (including Dolby metadata) and two GPI status signals into the video signal. The card also serves as a VLI and AFD inserter for an SD or HD signal. The card has built-in audio tone, timecode and video color bar test signals. 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
  • Automatic detection of input video loss and switchover to local black for continuity of embedded audio
  • Active format description (AFD) insertion for HD signals
  • VLI and AFD inserter for SD signals
  • AES inputs: either 110 ohm balanced or 75 ohm unbalanced, depending on rear panel in use
  • Sample rate conversion for asynchronous AES inputs
  • Audio input channel gain selectable from -96 dB to +12 dB by 0.5 dB steps
  • Audio groups insertion/pass-through/delete
  • Selectable audio delay of up to 3 frames in 1/2 frame steps
  • Left/right channels swappable for each AES input
  • Automatic mute on AES error
  • Selectable routing of AES signals to audio groups
  • Dolby E compatible (48 kHz synchronous)
  • 24-bit digital audio embedding
  • Linear Time Code (LTC) embedding
  • RS-422 serial data input for embedding as ANC data
  • Dolby metadata insertion using proprietary DID
  • Sampling of two GPI inputs for embedding as ANC data
VIDEO INPUT
  • Video signal: HD/SD-SDI SMPTE ST 292/SMPTE ST 259-C
  • Cable length: up to 110/250m (360/820 ft.) of Belden 1694A
  • Return loss: >15 dB, 5 MHz to 1.5 GHz
AUDIO AES-3id INPUT
  • Signal: AES-3id (SMPTE ST 276)
  • Level: 0.2 to 2.0 Vp-p
  • Impedance: 75Ω unbalanced
  • Cable length: >400 m
AUDIO AES3 INPUT
  • Signal: AES3
  • Level: 0.2 to 7.0 Vp-p
  • Impedance: 110Ω balanced
  • Cable length: >200m (656 ft.)
AUDIO AES SIGNALS
  • Sampling rate: 48 kHz synchronous or asynchronous (32 kHz - 96 kHz)
  • Dolby-E rate: 48 kHz synchronous
  • Bits: 24-bit
LTC SIGNAL
  • Signal: LTC per SMPTE ST 12
  • Impedance: <10 kΩ (bridging 600Ω) unbalanced
  • Level: 0.3 to 5 Vp-p
VIDEO OUTPUT
  • Video signal:
    • HD/SD-SDI (SMPTE ST 292/SMPTE ST 259)
    • Audio embedded per SMPTE ST 299/SMPTE ST 272
    • LTC embedded as ATC/DVITC (SMPTE RP 188/SMPTE ST 266)
    • RS-422 and two GPIs embedded as ANC data per SMPTE ST 291 (Proprietary DID)
  • Return loss: >15 dB up to 1.5 GHz
  • Wideband jitter: as per SMPTE ST 259-C and SMPTE ST 292
ANC SERIAL DATA INPUT
  • Signal: RS-422
  • Level: 300 mVp-p (min)
  • Rate: 38,400 or 115,200 Bd
ANC GENERAL PURPOSE INTERFACE (GPI) INPUT
  • Signal (2): Contact closure (opto-isolated), common ground
  • Level: True = 0 to 0.8 V (max.)
  • Maximum input voltage: ±5.5 V
  • Rate: DC to 250 Hz
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: 10s loop starting at 23:59:00:00
ELECTRICAL
  • Power: 7W
* Applicable to combinations of this card with ADX-1881.
Densité 2 frame Densité 3 frame Description
AMX-1881 AMX-1881-3RU HD/SD 8 AES Embedder
AMX-1881-75-DRP AMX-1881-75-3DRP Double rear connector panel, 75 ohm
AMX-1881-110-DRP AMX-1881-110-DRP-3RU Double rear connector panel, 110 ohm
 
Options Description
BOC-DE15-4BNC-1 4 AES breakout cable, 75 ohm
 
Remote control iControl, iControl Solo, RCP-200

AMX-1881: 8 AES HD/SD Embedder Datasheet

The AMX-1881 from Grass Valley, a Belden Brand, is a high-quality interface which embeds up to eight AES 24-bit 48 kHz digital audio signals into a single HD/SD serial digital video signal. The module offers audio and video signal presence detection and reporting, and local or remote configuration and control. A unique feature is its ability to embed timecode, a serial RS-422 data signal (including Dolby metadata) and two GPI status signals into the video signal. The card also serves as a VLI and AFD inserter for an SD or HD signal.

Posted Jun 06 2016 (GVB-1-0346D-EN-DS) File Size: 852.1 KB

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