4.1 Powering Up
and Down
Important!
4.1.1 Systems with Dis-
tributed Power Supplies
Powering Up:
Powering Down:
4.1.2 Systems with
PSU 4000 Central
Power Supplies
Powering Up:
Powering Down:
4.2 Status LED
16
AKG SPC 4
• To prevent damage from overloading the antenna combiner power supply,
always switch power to the various components of your system on and off
in the order described in sections 4.1.1 and 4.1.2.
1. Press the ON/OFF key on the antenna combiner to switch power to the antenna
combiner ON.
The status LED will be lit green.
2. Switch ON all transmitters connected to the antenna combiner.
1. Switch OFF all transmitters connected to the antenna combiner.
2. Press the ON/OFF key on the antenna combiner to switch power to the antenna
combiner OFF.
The status LED will extinguish.
1. Switch the PSU 4000 central power supply ON.
2. Press the ON/OFF key on the antenna combiner to switch power to the antenna
combiner ON.
The status LED will be lit green.
3. Switch ON all transmitters connected to the antenna combiner.
1. Switch OFF all transmitters connected to the antenna combiner.
2. Press the ON/OFF key on the antenna splitter to switch power to the antenna
splitter OFF.
The status LED will extinguish.
3. Switch the PSU 4000 central power supply OFF.
4 Operating Notes
!
Green The antenna combiner is
ON and connected to an
antenna approved by
AKG. The operating tem-
perature is within the safe
range.
Orange The operating tempera-
ture has reached a critical
level.
Switch power to the an-
tenna combiner OFF and
make sure that the venti-
lation grill is not ob-
structed.
Red The antenna combiner
has overheated.
Switch power to the an-
tenna combiner OFF and
make sure that the venti-
lation grill is not ob-
structed and the power
supply is connected cor-
rectly.
The antenna connected to
the antenna combiner is
not a type approved by
AKG is .
Switch power to the an-
tenna combiner OFF and
connect an SRA 2 W or
RA 4000 W antenna.
Dark Power to the antenna
combiner is OFF.
Switch power to the an-
tenna combiner ON.
The antenna combiner is
not connected to a power
supply.
Connect the antenna
combiner to your power
supply.
The DC cable(s) is/are not
connected or defective.
Connect or replace the
DC cable(s).
The AC adapter or
PSU 4000 is defective.
Contact your nearest AKG
Service Center.
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