Manual

28
Redbox User Handbook No 2
D-Type Audio Output Groups 1-4
Each output group connector has 5xDA driven balanced audio outputs on a D-type
connector outputs each with an output impedance of <50Ω.
1 8
9 15
Fig 8-4: RB-DA4x5 Audio Output Group15-Way D-Type Plug.
Function Output 1 Output 2 Output 3 Output 4 Output 5
Out + Pin No. 1 3 4 6 7
Out - Pin No. 9 10 12 13 15
Signal Ground Pin No. 2 11 5 14 8
Fig 8-5: RB-DA4x5 Pinout for Audio Output Group Connector.
Monitor LEDs
There are 4 LEDs on the front panel that indicate the relative levels of the audio signals at
the inputs or outputs. A pushbutton switch on the front panel toggles the function of these
LEDs between input and output. These LEDs indicate the levels of the signals by illuminating
green for signals between –12 and 0dBu, illuminating yellow for signals between 0 and
+6dBu, and illuminating red for signals over +6dBu.
Input Level Adjustment
The gain for each input can be adjusted through pre-set potentiometers that are accessible
from behind the removable plate on the front panel. The gain of each balanced input is
variable within a range of -8dB to +18dB into the router input.
Output Level Adjustment
The gain for each output group can be adjusted through pre-set potentiometers that are
accessible from behind the removable plate on the front panel. The gain of each output
group is variable within a range of -8dB to +18dB from the router output.
Routing Selection
Each output group is capable of selecting its signal from any combination of inputs and the
test tone. Set the appropriate dip-switch for that group & that input to the on position to
include the signal in the group’s output.
On $
Fig 8-6: RB-DA4x5 Routing Selection Switch.
AUDIO DISTRIBUTION AMPLIFIERS - RB-DA4x5
On
1 2 3 4 5 6 7 8 9
10
OUTPUT 1
TEST TONE
1 2 3 4
OUTPUT 2
TEST TONE
1 2 3 4
l
l
AUDIO DISTRIBUTION
AMPLIFIERS
8
Output 1
Output 2 Output 4
Output 3 Output 5