DDA-1112 Digital Audio Distribution Amplifier
Guide to Installation and Operation
DDA
-1
1
1
2
AE
S I
N
2
AE
S O
U
T
3
1
4
DDA-1112-
SRP
DDA-1112-
DRP/L
DDA
-1
1
1
2
1
2
3
4
AE
S O
U
T
AE
S IN
IN
L
OO
P
6
AE
S O
U
T
7
5
8
DDA-1112-
DRP
DDA
-1
1
1
2
1
2
3
4
AE
S O
U
T
AE
S IN
6
A
ES OUT
7
5
8
9
Se
le
ct
S
tat
us
Status LED
SELECT button
DDA-1112
DDA-1112 Rear Connector Panels
INSTALLATION
Make sure the following items have been shipped with your
DDA-1112. If any of the following items are missing, contact
your distributor or Miranda Technologies Inc.
*
DDA-1112 Digital Audio Distribution Amplifier
*
DDA-1112 rear connector panel (see figure for options)
The DDA-1112 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 DDA-1112.
Detailed instructions for installing cards and their associated rear
panels are given in the Densité Frame manual.
Internal Load Card Jumper
When used with a DDA-1112-DRP or a DDA-1112-SRP, the
jumper JP1 should be in the ON position.
When used with a DDA-1112-DRP/L, the jumper JP1 should be
in the OFF position.
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
DDA-1112 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).
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 conditions can be
reconfigured by the user (see the chart and menu for details).
: Factory default.
User configurable
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 its 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
REPORT
COLOR
(F=flashing)
SERIAL
GPI
G
Y
R
FR
No input lock
Biphase Coding
Error
Parity Error
CRCC Error
Slipped sample
Confidence
Invalid
Non audio
No signal input 1
No signal input 2
No rear panel
Page 2 of 6
DDA-1112