Miranda AMX-1842 HD/SD 4 AES Digital Audio Embedder w/ AMX-1842-75-DRP Backplane

The AMX-1842 is a high-quality embedder which embeds up to four AES 24-bit 48kHz digital audio signals into a single HD/SD serial digital video signal. It includes 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 and two GPI status signals into the video signal. The card has built-in audio tone, timecode and video color bar test signals.

Key Features

• • HD-SDI or SDI input

• • Automatic EQ for up to 110/250m (360/820 ft.)

• • Automatic detection of video input format

• • Continuity of embedded audio on loss of video input

• • 110 ohm balanced or 75 ohm unbalanced input

• • Input SRC to handle asynchronous audio

• • Audio channel gain selectable

• • Audio group insertion/bypass/delete

• • Selectable audio delay of up to 3 frames

• • Automatic mute on AES error

• • Selectable routing of AES signals

• • Left/right channels swappable

• • Dolby-E compatible

• • 24-bit digital audio embedding

• • Linear timecode (LTC) embedding

• • RS-422 input for embedding as ANC data

• • GPI inputs for embedding as ANC data

Specifications

VIDEO INPUT

• • Video signal: HD/SD-SDI SMPTE 292M / SMPTE 259M-C

• • Cable length: Up to 110/250m (360/820 ft.) of Belden 1694A

• • Return loss: >15 dB, 5 MHz to 1.485 GHz

• • AUDIO AES-3id INPUT

• • Signal: AES-3id (SMPTE 276M)

• • Level: 0.2 to 2.0 Vp-p

• • Impedance: 75Ω unbalanced

• • Cable length: >400m (1,312 ft.)

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

• • Dolby-E rate: 48 kHz synchronous

• • Bits: 24-bit

LTC SIGNAL

• • Signal: LTC per SMPTE 12M

• • Impedance: <10 kΩ (bridging 600Ω) unbalanced

• • Level: 0.2 to 5 Vp-p

VIDEO OUTPUT

• • Video signal: HD/SD-SDI (SMPTE 292M / SMPTE 259M-C)

• • Audio embedded per SMPTE 299M / SMPTE 272M

• • LTC embedded as ATC/DVITC (SMPTE RP188/SMPTE 266M)

• • RS-422 and two GPIs embedded as ANC data per SMPTE 291M (Proprietary type 1 DID)

• • Return loss: >15 dB up to 1.485 GHz

• • Wideband jitter: as per SMPTE-259M-C and 292M

ANC SERIAL DATA INPUT

• • Signal: RS-422

• • Level: 200 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*)

• • 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

RS-422

• • Latency: max 500 µs*

GPI

• • Latency: 4 video lines*

• • Test signals: Video – color bars 100%

• • Audio – 1 kHz tone (R steady, L pulsed) -18 dBFS (EBU R49, R68)

• • LTC – 10s loop starting at 23:59:00:00

ELECTRICAL

• • Power: 6W

*Applicable to combinations of this card and ADX-1842/1852.

Weight	4 lbs
Dimensions	12 × 9 × 4 in