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8
MW-520 Application Developer's Guide
Battery
Microphone, Sound Controller, and Speaker
Table 2
Display Buttons Functionality
Control/Indicator
Power
Power LED
Temperature LED
Suspend/Resume
Suspend/Resume LED
Backlight
Backlight LED
Brightness
Volume
User-defined
Emergency
MW-520 is externally powered from the 12V vehicle battery. A Lithium backup
battery maintains the system configuration and time.
One of the MW-520's main features is its integrated data and voice
communication capability.
The workstation has an internal speaker located on the display unit. The speaker is
used for various audio alert signals.
The processor unit includes a Windows compatible sound card and external
microphone and speaker jacks.
The microphone and the speaker can also be used for future two-way voice
communication, text-to-speech, and voice recognition applications.
Function
Turns the MW-520 on or off.
Power on/off indication;
Blinks when the battery is low.
Extreme temperature conditions indication.
Toggles between suspend and resume.
Suspend indication.
Backlight on/off. Adjust backlight level, using
the Brightness button.
Backlight on/off or faulty processor
indication.
Increases/decreases brightness level.
Increases/decreases speaker's volume level
(if both buttons have been pressed, the
sound will be muted or audible).
Carries out a specific function, according to
the specific user application.
Sends an emergency message to the RF
host computer. (This key's functionality
depends on its definition in each user system
and the active application.)
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