DDA-1112 Digital Audio Distribution Amplifier
Guide to Installation and Operation
M453-9600-103
(DENSITÉ) SERIES
May 2006
DDA-1112
Description
The Digital Audio Distribution Amplifier DDA-1112
supports AES3-id 75
Ω
and provides 9 outputs, or 8
outputs with an input loop. The input features clock
regeneration for reduced jitter and signal restoration. A
signal detection stage permits to control the content of the
audio signal. A multi-coloured Led, visible with the door
closed, report the card status. The DDA-1112 requires a
"single" or a "double" rear connector panel
.
Features
•
Digital audio distribution amplifier 1 input to 4,
8 or 9 outputs
•
AES3-id audio unbalanced input
•
Remote control of carrier quality
•
Silence detect with user adjustable delay and
threshold
•
Intra frame output for monitoring
•
Status Led and remote reporting
•
Signal regeneration
•
V, U, C, P bits transparency
FUNCTIONAL BLOCK DIAGRAM
AUDIO
OUTPUTS
AUDIO
INPUT
1
2
3
4
5
6
7
8
Rem Control
Select
Status
Eq
Reclocker
9
Microcontroller
Audio
detection
To INTRA FRAME
MONITORING
Internal
LOAD
ON
OFF
SPECIFICATIONS
Input
Signal: .......................AES3-id (SMPTE 276M)
Level: ........................0.1 to 7.0 Vpp
Impedance: ...............75
Ω
unbalanced or Hi-Z
..................................(selection by a jumper)
Equalization: .............0 to >2000 m
Outputs
Signal: .......................AES3-id (SMPTE 276M)
Level: ........................1 Vpp
Impedance: ...............75
Ω
unbalanced
Return loss:...............15 dB
Jitter reduction: ........>15 dB (@ 100 kHz)
Specific jitter:.............<0.005 UI pp (700 Hz to 100 kHz)
Signal Processing
Sampling:.................. 28 to 100 kHz
Processing delay: ..... <12 µs @ 48kHz
Signal absence
- threshold:................ -48 / -72 dBFS (6 dB step)
- delay: ...................... from 0 to 255 s
V, U, C, P bits transparency
Miscellaneous
Power: ...................... single: 1.4 W
.................................. double: 2 W
DDA-1112
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