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Redback® Proudly Made In Australia
2
Redback® A 5131
Priority Mixer
Front Panel Controls
Each input is equipped with a volume control and channel active LED indicator. LED’s are provided to indicate power, mode
of priority ie Cascade, FIBD, or Mixed plus the type of muting. i.e. PTT or VOX.
Fig 1
1
Volume Controls
Each input has its own dedicated volume control.
2
Input Active LED
These LED’s indicate which input is currently active, with a steady indication. All other input LED’s flash to indicate
the system is busy.
3
VOX sensitivity controls
Each input has its own VOX sensitivity adjustment trimpot.
4
VOX/PTT Indicators
These LED’s indicate if the unit has VOX or PTT muting active. Selectable via DIP Switches (Refer DIP SW settings).
5
Priority Indicators
These LED’s indicate which priority mode the unit is running in, if muting has been enabled via DIP switch 1.
Internal Jumper Settings
Phantom Power
Jumper JP5
is used to activate phan-
tom power. Once activated 12V DC
will be provided to the hot and cold
terminals of all four of the microphone
input connectors.
System Busy - Switched Out
Voltage
Each channel has a corresponding
‘switched out’ set of terminals which
can be used for remote monitoring.
The voltage output on these terminals
can be set to either 1.5V DC for direct
driving of an indicator LED or 12V DC
for driving incandescent lamps. A set
of jumpers has been provided for each
output.
Fig
2
Power
On
Cascade
FIBD
Mixed
PTT
VOX
Input 1
Vox
Sens.
Input 2
Vox
Input 3
Vox
Input 4
Vox
Sens.
Sens.
Sens.
Timer
Priority Mixer
A 5131
1
2
3
4
5
0
2
4
6
8
10
0
2
4
6
8
10
0
2
4
6
8
10
0
2
4
6
8
10
Phantom power
jumper
Jumpers select switched out
voltage. 1.5V DC or 12V DC.
