MSB Technology The Reference DAC User Manual page 15

Powerbase Controls
There is one button on the front of the powerbase as well as two
control features just under the front of the powerbase on the
bottom.
LED
indications
Display bright-
ness
Power control Normal - This sets the powerbase as the 12 volt
Powerbase - 12 Volt Remote Trigger
This powerbase is equipped with a remote trigger for use with other
MSB products. The trigger uses a 3 pin mini jack. When any MSB
product is turned off, the other products connected will also turn
off and vice-versa. This trigger can also be used with other products.
Products may use this trigger differently, so you may need to rewire
a cable or use an interface relay. The connector is wired as shown. If
you connect "signal" to "ground", all MSB products will turn off. If you
connect "signal" to "12 V" or leave it open, all MSB products will turn
on.
White - Power on.
Red - Power off.
Amber - Linked mode, 12 volt trigger controlled.
Flashing Amber - Over-voltage protection.
This is a rolling wheel to control the brightness of
the power indication light
trigger master.
Linked - This sets the powerbase as the 12 volt
trigger slave.
The 'master' powerbase will control this unit.
Front of Powerbase
Power Control
Linked
Normal
LED Indicator
Power Button
IR Sensor
Display Brightness
Darker Brighter