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Basic Calibration
The console has trim pot level adjustment for several inputs and outputs.
WARNING
The console has been calibrated at the factory to normal -10dBu and +4dBu levels and should not require field calibra-
tion. Usually, it is better to adjust the level out of the source device than to adjust the console trim levels. Field calibra-
tion should only be done with proper test equipment and by a qualified audio technician.
VU METER ADJUSTMENT
The VU meters are factory set for +4dBu at 0VU. These levels should not be changed from factory settings unless directed by factory service technicians.
MIC GAIN ADJUSTMENT
These trim pots are set at the factory for typical microphone gain levels. These trim pots can be adjusted if different mic gains are required. To adjust, the
simplest method is to speak into the mic and adjust the trim pot with a small straight edge screwdriver until the desired gain is reached.
UNBALANCED SOURCE CHANNEL GAIN ADJUSTMENT
No gain adjust is required for unbalanced -10dBu source devices
BALANCED SOURCE CHANNEL GAIN ADJUSTMENT
These channels are set at the factory for +4dBu levels. If the levels must be adjusted, trim pots are available on the bottom of the motherboard. This
requires the bottom panel of the console to be removed. Care must be taken when adjusting the trimpots to not short any electronics. Refer to the
motherboard diagram in Section Six, Service and Maintenance.
PHONE CHANNEL TEN LEVEL ADJUST
The phone in and out audio connectors are balanced +4dBu outputs that may be adjusted on the rear panel by the trimpots located beside each XLR connec-
tor.
PROGRAM & AUDITION OUTPUT LEVEL ADJUST
The Program balanced output has a trim pot level adjust on the rear panel beside the XLR.
The Audition output is unbalanced -10dBu consumer level and does not require trimming.
Cue
Ch 14
Air
Mon
ARC-15BP
L
L
L
Headphone
RS232
R
R
R
Logic
DC Power
In
In
In
Out
I N S T A L L A T I O N I N S T R U C T I O N S
PHONE
PROGRAM
trim pots
trim pots
PMM
Aud
Pgm
Phone Logic
Pgm Left
Pgm Rght
Phone
L
L
R
R
AMM
Out
Out
Ground
Out
Out
Out
Back panel Diagram for ARC-15BP console
Ch 15 Phone
Ch 14
Ch 13
Ch 12
Ch 11
Ch 10
Ch 9
Ch 8
Mic Ch 5
PC
48V
In
USB
pwr
In
4.21
Ch 7
Ch 6
Ch 5
Ch 4
Ch3
Ch 2
Mic Ch 3
Mic Ch 4
In
MIC
trim pots
Mic Ch 2
Mic Ch 1
Arrakis
Systems
In
In
In
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