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Description
The AMX-1842 is a high-quality embedder which embeds
up to four AES 24-bit 48 kHz 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 time code, a serial RS-422 data signal
and two GPI status signals into the video signal. The card
has built-in audio tone, time code and video color bar test
signals.
The AMX-1842 is designed for use in the DENSITÉ frame,
with the appropriate double-width rear panel.
Video - Features
•
Serial HD/SD-SDI input with automatic equalization for
up to 110/250 meters of cable.
•
Automatic detection of video input format
•
Automatic detection of input video loss and switchover
to local black for continuity of embedded audio.
Audio - Features
•
AES inputs: either 110 Ω balanced or 75 Ω
unbalanced, depending on rear panel in use
FUNCTIONAL BLOCK DIAGRAM
AMX-1842
•
Sample rate conversion for asynchronous AES inputs
•
Audio input channel gain selectable from -96dB to
+12dB by 0.5dB steps
•
Audio groups insertion/pass-through/delete
•
Selectable audio delay of up to 3 frames in ½ 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 (48kHz synchronous)
•
Cards cascadeable to embed 4 groups (16 channels)
•
24-bit digital audio embedding
•
Monitor selector for Densité frame monitor switcher
(MSB)
•
Universal reference signal output for audio DAC
Embedding Other Signals - Features
•
Linear Time Code (LTC) embedding
•
RS-422 serial data input for embedding as ANC data.
•
Sampling of two GPI inputs for embedding as ANC
data.
SPECIFICATIONS
VIDEO INPUT
Video Signal:
Cable Length:
Return Loss:
AUDIO AES-3id INPUT
Signal:
Level:
Impedance:
Cable length:
AUDIO AES3 INPUT
Signal:
Level:
Impedance:
Cable length
AUDIO AES SIGNALS
Sampling Rate:
Dolby-E Rate:
Bits:
AMX-1842
AMX-1842 HD/SD 4 AES Embedder
Guide to Installation and Operation
M684-9600-102
November 2011
HD/SD-SDI
SMPTE 292M / SMPTE 259M
(see list of supported formats below)
up to 110/250 meters of Belden 1694A
>15 dB, 5 MHz to 1.485 GHz
AES-3id (SMPTE 276M)
0.2 to 2.0 Vp-p
75 Ω unbalanced
>400 m
AES3
0.2 to 7.0 Vp-p
110 Ω balanced
>200 m
48kHz synchronous or asynchronous
48kHz synchronous
24-bit
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Summarization of Contents
Specifications
VIDEO INPUT
Details specifications for the HD/SD-SDI video signal input, including signal type, cable length, and return loss.
AUDIO AES-3id INPUT
Specifies parameters for AES-3id audio inputs, including signal type, level, impedance, and cable length.
AUDIO AES3 INPUT
Details specifications for AES3 audio inputs, covering signal type, level, impedance, and cable length.
AUDIO AES SIGNALS
Lists specifications for audio signals, such as sampling rate, Dolby-E rate, and bit depth.
LTC SIGNAL
Provides specifications for the Linear Time Code (LTC) signal input, including impedance and level.
VIDEO OUTPUT
Outlines specifications for the video output signal, including embedded audio and data types.
ANC SERIAL DATA INPUT
Details specifications for the RS-422 serial data input used for embedding as ANC data.
ANC GENERAL PURPOSE INTERFACE (GPI) OUTPUT
Specifies parameters for the GPI output signal, including contact closure type, level, and rate.
PROCESSING PERFORMANCE
Covers processing performance metrics like signal path, video delay, and audio processing delay.
Operation
Status Monitor LED
Explains the function and status indications of the multi-color LED on the module's front card-edge.
User Interface
Describes how to use the SELECT button and local control panel for card interaction and status display.
Operating Parameter Adjustment
Details how to adjust operating parameters via the controller card interface using the SELECT button.
iControl Interface
Status bar
Describes the continuous status update provided by the status bar, including icons and message area.
Audio
Explains the audio tab controls for processing and embedding audio signals, including group detection.
Metadata
Covers settings for LTC, RS422, and GPI status data embedding into HD/SDI signals.
Input Error
Details the auto black feature for replacing video input with local black during input failure.
Test
Explains how to enable test signals on AES and video outputs for troubleshooting purposes.
Factory
Describes the factory default reset function and how to restore adjustable parameters.
User Presets
Details how to save and load up to 5 user-defined parameter settings for personalized configuration.
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