Grass Valley ADX-1881 User Manual
ADX-1881
Description
The ADX-1881 is a high-quality AES de-embedder
designed to extract eight (8) 24-bit 48 kHz digital audio
signals, Ancillary time code (ATC), longitudinal time code
(LTC) and ancillary data from a single SMPTE 292M HDSDI or SMPTE-259M-C SD-SDI signal. The ADX-1881will
output audio silence with a loss of the input signal. A delay
of up to 6 fields can be added to the audio. The ADX-1881
has a built-in audio test tone signal. The ADX-1881 provides
automatic input format detection as well as automatic
equalization. A serial data signal (RS-422) output is
available to provide Dolby E metadata output or simply to
output a serial RS422 signal. Two GPI outputs will recreate
the GPI activated by the AMX card. By combining AMX and
ADX cards at each end a full duplex link may be
established.
.
The ADX-1881 is designed for the DENSITÉ frame.
ADX-1881 HD/SD 8 AES Disembedder
Guide to Installation and Operation
M683-9900-100
July 2005
Audio - Features
• 8 AES outputs: either 110 Ω balanced or 75 Ω
unbalanced, depending on rear panel in use
• Selectable audio delay of up to 3 frames in ½ frame
steps
• 24-bit digital audio disembedding
• Audio silence output on loss of video input
• Left/Right channels swappable for each AES output
• Selectable routing of audio groups to AES outputs
• Co-phased audio outputs
• Dolby-E compatible
• Monitor selector for Densité frame monitoring switch
bridge (MSB) and analog, stereo audio output
• Analog monitor output muting for non-linear PCM AES
signals
Disembedding Other Signals - Features
Video - Features
• Serial HD/SD-SDI input with automatic equalization for
up to 110m/250m of cable
• Automatic detection of video input format
• Two pass-through HD/SD-SDI video outputs
FUNCTIONAL BLOCK DIAGRAM
• Linear Time Code (LTC) output translated from
Ancillary Time Code (ATC) data or Digital Vertical
Interval Time Code (DVITC)
• RS-422 serial data output signal reconstructed from
ANC data inserted by the embedder (including Dolby
metadata)
• Two opto-isolated GPI data output signals
reconstructed from ANC data inserted by the embedder
SPECIFICATIONS
VIDEO INPUT
Video Signal: HD/SD-SDI
SMPTE 292M/SMPTE 259M
(see list of supported formats below)
Embedded audio as per SMPTE
299M/SMPTE 272M
Embedded ATC/DVITC as per
SMPTE RP 188/SMPTE 266M
Embedded RS-422 & GPI as per
SMPTE 291M (with proprietary DID)
Cable Length: up to 110m/250m of Belden 1694A
Return Loss: >15 dB, 5 MHz to 1.5 GHz/270MHz
AUDIO AES-3id OUTPUT
Signal: AES-3id (SMPTE 276M)
Level: 1.0 Vp-p ±10%
Impedance: 75 Ω unbalanced
……(continued)
ADX-1881 Page 1 of 12
ADX-1881 HD/SD 8 AES Disembedder
PROCESSING PERFORMANCE
Panel
Guide to Installation and Operation
SPECIFICATIONS(cont’d)
AUDIO AES SIGNAL
Sampling Rate: 48kHz synchronous
LTC SIGNAL OUTPUT
Signal: Reconstructed LTC from ATC/DVITC
Impedance:
Level: 1.0 Vp-p
RS-422 SIGNAL OUTPUT
Signal: RS-422
Rate: Reconstruction of signal input to
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 292M/SMPTE
Return Loss: >15 dB up to 1.5 GHz/270MHz dB
Wideband Jitter: < 0.2 UI p-p
< 55Ω source, unbalanced 1kΩ load
embedder (38,400 or 115,200 bauds)
259M
Signal Path: 10-bit video / 24-bit audio
Audio Processing
Delay:
Audio Delay: Up to 3 video frames (1/2 frame steps)
ATC/DVITC Delay: None, 1, 2,or 3 frames before
RS-422
Processing Delay:
GPI Processing
Delay:
Test Signals: Audio - 1 kHz tone (R steady, L
Power: 9.5 W
Note ‡‡: Applicable to combinations of AMX-1881and ADX1881
List of supported 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 x1080/59.94/i)
ADX-1881-75-DRP
875 µs (combined embedding and
extraction ‡‡)
translation to LTC
500 µs max. (combined embedding
and extraction ‡‡) (1 frame in
metadata mode)
4 video lines (combined embedding
and extraction ‡‡)
pulsed) -18dBFS (EBU R49, R68)
LTC – 10 second loop starting at
23:59:00:00
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
525 (NTSC)
625 (PAL)
ADX-1881Breakout
ADX-1881
ADX-1881 Front card edge
Page 2 of 12 ADX-1881
Select
Status
SELECT button
Status LED
(Note: female 15-pin connectors on both panels)
ADX-1881 Rear Connector Panels
INSTALLATION
Make sure the following items have been shipped with your
ADX-1881. If any of the following items are missing,
contact your distributor or Miranda Technologies Inc.
* ADX-1881 HD/SD 8 AES Disembedder
* ADX-1881-75-DRP rear panel
* ADX-1881 rear panel
* Densite-ext-mount external mounting bracket (one per
frame)
The ADX-1881 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 ADX-1881. See the DENSITÉ Frame manual for
detailed instructions for installing cards and their
associated rear panels.
The ADX-1881 has multiple inputs and outputs, and
making space for all the necessary connectors at the rear
of the frame requires a double-width rear panel.
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 ADX-1881 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).
REPORT COLOR (F=flashing)
SERIAL GPI G Y R FR
No errors
No signal
No rear
Test mode
µ : Factory default. User configurable
µ
µ
µ
µ
µ
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.
ADX-1881 HD/SD 8 AES Disembedder
Guide to Installation and Operation
When a double–width rear panel has been installed, the
ADX-1881 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.
In addition, the ADX-1881 requires an external mounting
bracket and breakout panel. The breakout panel is
connected to the rear panel via a multi-conductor cable
fitted with two male connectors. The ADX-1881’s inputs
and outputs occupy both panels.
See the annex at the end of this manual for the
specification of the cable to interconnect the rear panel and
the breakout panel.
The LED color assignments for some error 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:
A D X - 1 8 8 1
Use the local control panel to access the detailed status
report shown in the STATUS menu on page 3.
Operating Parameter Adjustment
The ADX-1881 has operating parameters which may be
adjusted at the controller card interface. After pressing the
SELECT button on the ADX-1881 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.
A LN O S I G N
ADX-1881 Page 3 of 12
ADX-1881 HD/SD 8 AES Disembedder
Guide to Installation and Operation
ADX-1881 Menus
STATUS
USER PRESET
(continued)
NO REAR/ NO SIGNAL/ 720p50/ 720p60/ 720p59.94/ 1080p24/ 1080p24sF/ 1080p23.98/
1080p23.98sF/ 1080p25/ 1080i50/ 1080p29.97/ 1080i59.94/ 625/ 525
AUDIO GROUPS
EMBEDDED TC
EMBEDDED
RS422
EMBEDDED GPI
AES OUT 1
AES OUT 2
AES OUT 3
AES OUT 4
AES OUT 5
AES OUT 6
AES OUT 7
AES OUT 8
NONE / 1234
NONE / PRESENT
NONE / PRESENT
NONE / 12
BITS
MODE
EMPHASIS
USE
ENCODING
Same as AES OUT 1
Same as AES OUT 1
Same as AES OUT 1
Same as AES OUT 1
Same as AES OUT 1
Same as AES OUT 1
Same as AES OUT 1
LOAD
SAVE
[ USER 1, USER 2, USER 3, USER 4, USER 5 ]
[ USER 1, USER 2, USER 3, USER 4, USER 5 ]
16 BIT / 20 BIT / 24 BIT / OTHER
N.I. / 2 CHANNEL / 1 CHANNEL / P/S / STEREO
N.I. / NONE / 50/15-us / J.17
CONSUMER / PROFESSIONAL
LINEAR PCM / NON PCM
Page 4 of 12 ADX-1881
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