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Redback® Proudly Made In Australia
1
Redback® A 5131
Priority Mixer
Operating Manual
A 5131
Priority MIxer
Description
This four channel mixer features 4 balanced mic inputs and 3 line inputs. Input 1 is a dedicated balanced mic input whilst
inputs 2 - 4 can accept either balanced mic or line level.
Priorities
3 modes of priority are selectable via the DIP switches on the rear:
Cascade:
Input 1 overrides 2-4, Input 2 overrides 3-4, Input 3 overrides 4.
FIBD:
First In Best Dressed - Regardless of which input is being used, it automatically blocks out all other inputs.
MIxed:
No priority therefore all inputs will be mixed as per a normal mixer.
Muting
The system can be configured for PTT muting which operates only with microphone inputs, or VOX muting which
operates with both microphone and line inputs. This function is switch selectable via the rear panel DIP switches.
(See DIP Switch settings).
Phantom Power
Each microphone input has the option for phantom power (+12V DC). The phantom power is activated for all microhone
inputs via jumper JP5 located inside the unit. (Refer to Fig 2).
System Busy
Euro block terminals are included for remote LED indication that the system is busy. For the input in use the LED is in a
steady illuminated state. For all other inputs the LED’s flash indicating the system is busy and in use. The corresponding
LED on the front panel also illuminates indicating the active channel.
The LED’s operate both with microhpne and auxilliary input signals with either the PTT or VOX muting options selected.
The remote busy indicator voltage can be selected internally to 1.5V DC for driving LED’s direct ,or 12V DC for driving
incandescent lamps.
VOX sensitivity
The sensitivity of the VOX circuit can be adjusted via the trimpots located on the front of the unit. Each input has its own
dedicated adustment trimpot. If the Vox circuit needs to be turned off for a particular input, turn the corresponding
trimpot fully anti-clockwise.
Features
• 4 balanced microphone / 3 line inputs • 3 modes of priority Cascade, FIBD,Mixed
• VOX or PTT muting
• Channel active indicators
• VOX muting or both mic and line inputs
• 24V DC operation
• Adjustable VOX sensitivity for each input• Separate volume for each input
• 24V DC plugpack included
User manual revision number 1.4 25/10/2021
