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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
• Channel active indicators
• Adjustable VOX sensitivity for each input• Separate volume for each input
www.redbackaudio.com.au
Redback® A 5131 Priority Mixer
• 3 modes of priority Cascade, FIBD,Mixed
• VOX muting or both mic and line inputs
Operating Manual
A 5131
• VOX or PTT muting
• 24V DC operation
• 24V DC plugpack included
User manual revision number 1.4 25/10/2021
Redback® Proudly Made In Australia
Priority MIxer
1
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Summary of Contents for Redback A 5131
- Page 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.
- Page 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.
- Page 3 Redback® A 5131 Priority Mixer Inputs and Outputs Microphone connections are via 5 way pluggable euro block and line connections are via stereo RCA sockets (converted to mono internally). Two outputs are provided, one for balanced output (level selectable 3mV or 1V via the rear panel DIP switches ) and one for line level.
- Page 4 Redback® A 5131 Priority Mixer Cable Requirements Connection details for balanced microphone inputs with PTT switch and busy LED indicator. PTT Switch Busy Light 12V or 1.5V DC Hot + Earth Cold - Fig 4 DIP Switch settings The DIP switches on the rear of the unit configure the Priority mode, muting options and the Mic output sensitivity.