Grass Valley AMX-1842 User Manual
AMX-1842 HD/SD 4 AES Embedder
SPECIFICATIONS
VIDEO INPUT
Video Signal:
HD/SD-SDI
(see list of supported formats below)
Cable Length:
up to 110/250 meters of Belden 1694A
Return Loss:
>15 dB, 5 MHz to 1.485 GHz
AUDIO AE S -3id INPUT
Signal:
AES-3id (SMPTE 276M)
Level:
0.2 to 2.0 Vp-p
Impedance:
75 Ω unbalanced
Cable length:
>400 m
AUDIO AES3 INPUT
Signal:
AES3
Level:
0.2 to 7.0 Vp-p
Impedance:
110 Ω balanced
Cable length
>200 m
AUDIO AES SIGNALS
Sampling Rate:
48kHz synchronous or asynchronous
Dolby-E Rate:
48kHz synchronous
Bits:
24-bit
Guide to Installation and Operation
M684-9600-102
November 2011
AMX-1842
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 ser ial 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
• 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.
SMPTE 292M / SMPTE 259M
AMX-1842 Page 1 of 10
AMX-1842 HD/SD 4 AES Embedder
Select
Status
Status LED
SELECT button
AMX-1842
SPECIFICATIONS(cont’d)
LTC SIGNAL
Signal:
LTC per SMPTE 12M
Impedance:
< 10kΩ (bridging 600Ω) unbalanced
Level:
0.2 to 5Vp-p
VIDEO OUTPUT
Video Signal:
HD/SD-SDI
(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 mVpp (min)
Rate:
38.400 or 115.200 bauds
ANC GENERAL PURPOSE INTERFACE (GPI) OUTPUT
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
Video Delay:
HD: 4.5 µs / SD: 11.5 µs
Audio Processing
Delay:
875 µs audio insertion delay ‡‡
Audio Delay:
Up to 3 video frames (1/2 frame steps)
LTC Delay:
Up to 3 video frames (one frame steps)
RS-422
max 500 µs ‡‡
GPI
Processing delay:
4 video lines ‡‡
Test Signals:
Video - color bars 100%
23:59:00:00
Power:
6 W
Note ‡‡: Applicable to combinations of this card and ADX1842/1852.
List of supported formats:
AMX-1842-75-DRP
AES-3id
AMX-1842-110-DRP
AES3
Guide to Installation and Operation
AMX-1842 Rear Connector Panels
(SMPTE 292M / SMPTE 259M)
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
AMX-1842 Front card edge
Processing delay:
Audio - 1 kHz tone (R steady, L pulsed)
-18dBFS (EBU R49, R68)
LTC – 10 second loop starting at
HD-SDI formats :
1920 x 1080/59.94/I
1920 x 1080/50/I
1920 x 1080/29.97/P
1920 x 1080/25/P
1920 x 1080/24/P
1920 x 1080/23.98/P
1920 x 1080/29.97/PsF
(detected as 1920 x 1080/59.94/I)
1920 x 1080/25/PsF
(detected as 1920 x 1080/50/I)
1920 x 1080/24/PsF
1920 x 1080/23.98/PsF
1280 x 720/59.94/P
1280 x 720/50/P
SD-SDI formats :
525
625
Page 2 of 10 AMX-1842
REPORT
COLOR (F=flashing)
SERIAL
GPI G Y R FR
No errors
No signal
No rear
Test mode
A M X - 1 8 4 2
A LN O S I G N
INSTALLATION
Make sure the following items have been shipped with your
AMX-1842. If any of the following items are missing,
contact your distributor or Miranda Technologies Inc.
* AMX-1842 Digital Audio Embedder
* AMX-1842 rear panel (see figure for options)
The AMX-1842 and its associated rear connector panel
must be mounted in a DENSITÉ frame. It is not necessary
to switch off the frame’s power when installing or removing
the AMX-1842. See the DENSITÉ Frame manual for
detailed instructions for installi ng cards and the ir
associated rear panels.
OPERATION
Overview
The DENSITÉ frame incorporates a central controller card,
located in the center of the frame, which is equipped with
an LCD display and a control panel. The controller handles
error reporting and local and remote control for all cards
installed in the frame. The display and control panel are
assigned to the card in the frame whose SELECT button
has been pushed.
Status Monitor LED
The status monitor LED is located on the front card-edge of
the AMX-1842 module, and is visible through the front
access door of the DENSITÉ frame. This multi-color LED
indicates module status by color, and by flashing/steady
illumination, according to the following chart (which also
indicates fault reporting for this card on the DENSITÉ
frame’s serial and GPI interfaces).
: Factory default. User configurable
A “Flashing Yellow” Status LED indicates that the SELECT
button on the front panel has been pushed, and the
controller display and control panel are now assigned to
this card. The LED color assignments for some error
AMX-1842 HD/SD 4 AES Embedder
Guide to Installation and Operation
The AMX-1842 has multiple audio and video inputs and
outputs, and making space for all the necessary
connectors at the rear of the frame requires a double-width
rear panel.
When a double–width rear panel has been installed, the
AMX-1842 must be installed in the right-most of the two
slots covered by the panel in order to mate with the panel’s
connectors. If it is placed in the wrong slot, the front panel
LED will flash red. Move the card to other slot for correct
operation. No damage will result to the card should this
occur.
conditions can be reconfigured by the user (see the chart
and menu for details).
User Interface
Pushing the SELECT button will cause the on-card
STATUS LED to flash yellow, and the card identification
and the current status will be shown on the controller card’s
display. The STATUS LED will revert to it’s normal state
upon a second push of the button, or after a short delay.
The messages which may appear are shown in the top line
of the menu chart on page 3
Example :
SELECT button pushed twice when there is no input
signal connected to the rear panel and the LED is
steady red:
Use the local control panel to access the detailed status
report shown in the STATUS menu on page 3.
Operating Parameter Adjustment
The AMX-1842 has operating parameters which may be
adjusted at the controller card interface. After pressing the
SELECT button on the AMX-1842 card, use the keys on
the local control panel (described in the Controller card
manual) to step through the displayed menu and adjust the
parameters. The menus are shown below.
AMX-1842 Page 3 of 10
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