MOTU Traveler-mk3 User Manual page 24

Examples of bus- powered operation
Here are a few typical examples of bus-powered
Traveler-mk3 operation:
Bus power from a desktop computer
Your desktop computer is running off of its usual
AC power connection, and the Traveler-mk3 draws
power from the FireWire cable connected to the
computer. There are no limits to running time.
Bus power from an AC-powered laptop
This scenario is identical to the desktop situation
described above: the laptop is powered by AC, the
Traveler-mk3 is powered via the FireWire bus and
there are no limits to running time.
Bus power from a battery-powered laptop
The laptop is being powered by its own battery, and
the Traveler-mk3 is being powered by its FireWire
connection to the computer. So the laptop battery
is supplying power to both the laptop and the
Traveler-mk3. This is the most compact and
portable operating scenario. Running time is
determined by the capacity of the laptop battery.
For extended recording sessions, bring extra, fully
charged laptop batteries.
Powering the Traveler-mk3 from a battery pack
The 4-pin XLR battery jack on the Traveler-mk3
side panel allows you to connect a standard DC
battery pack, which is ideal for extended remote
recording. These products can provide multiple
hours of operation, depending on their capacity.
The battery pack should supply 10-18 volts and 12
watts. A typical application would employ a 12 volt
battery, therefore requiring 1 amp. In this scenario,
a 1 amp-hour battery will power the unit for
1 hour. A 10 amp-hour battery will power the unit
for 10 hours. Follow the manufacturer's recom-
mendations for battery discharge for proper
battery maintenance. For further details, contact
your preferred supplier of professional audio/video
equipment.
24
DC power supply
If you do not want the Traveler-mk3 to draw power
from the computer, and AC power is available, you
can power the Traveler-mk3 from any standard
8-18 volt, 12 watt DC power supply with any
polarity (tip positive or negative) and amperage as
shown below. To prevent the Traveler-mk3 from
drawing power from the computer, turn off the Bus
Power switch.
Voltage
9 volts
12 volts
18 volts
The Bus Power Enable/Disable switch
The Bus Power Enable/Disable switch on the side
panel of the Traveler-mk3 lets you control whether
or not the Traveler-mk3 draws power from the
computer via FireWire.
For example, when battery or DC power supply
options are not being used, and FireWire is the
only available power source, turn on the Bus Power
switch.
If you are powering the Traveler-mk3 via battery or
DC power supply, and you do not want it to draw
power from the computer (perhaps because it is a
laptop running under its own battery, and you
don't want the Traveler-mk3 to run down the
laptop's battery unnecessarily), turn off the Bus
Power switch.
I N S T A L L I N G T H E T R A V E L E R - M K 3 H A R D W A R E
Amperage
1.33 amps
1 amp
0.66 amps