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Dolphin® 7900 Series Mobile Computer User’s Guide 3 - 3
Audio Jack
Dolphin 7900 terminals contain a 2.5mm audio jack that supports both speaker (stereo) and microphone (mono)
headsets. Both microphone and speaker are located on the front panel for voice communication that is fully
integrated with terminal operation.
Speaker
The Dolphin 7900 terminal has an integrated speaker that sounds audio signals as you scan bar code labels and
enter data. The operating frequency range is 500Hz at 71 dB up to 80 dB. The speaker can also be used for playing
sounds (e.g., WAV or MP3 files).
When used in conjunction with the microphone on the keyboard, the speaker can also be used for two-way voice
communications. Both speaker and microphone are located on the front panel for voice communication that is fully
integrated with terminal operation.
IrDA Port
The Infrared Data Association or IrDA port communicates with IrDA-enabled devices such as PC’s, printers,
modems, or other Dolphin 7900 terminals. The maximum speed is 115kbps.
Scan LED
The scan LED lights red when you press the SCAN key in scanning applications.
Decode LED
The decode LED lights green when a scanned bar code is successfully decoded.
Note: Both LEDs can be programmed by various software applications.
Touch Screen Display
Dolphin 7900 terminals feature a 3.8” liquid crystal display (LCD) that is covered with an industrial, protective touch
screen lens. The video graphic array (VGA) resolution is 1/4 (240 X 320 pixel). The touch screen is activated with
the stylus (included with the terminal) or a finger.
The color LCD is 16 bits/pixel and uses active display or thin film transistor (TFT) technology. The backlight for the
display illuminates when the screen is touched. For more information about the Backlight,
see Adjusting the
Backlight on page 4-4.
SCAN Key
The SCAN key is centrally located for easy access with the right or left hand. When pressed, the SCAN key
activates the scanner/imager. The SCAN key also functions as an on or system wakeup control for the terminal.
Navigation Keys
The centrally-located navigation keys enable you to move and position the cursor through software programs. The
up and down arrows are programmed to perform specific functions when pressed in combination with the Blue and
Red modifier keys.
Recessed Keyboard
The Dolphin 7900 Series features two keyboard options: 25-key numeric and 36-key alpha keyboard. Both
keyboards are recessed under the overlay for maximum durability and backlit for easy viewing in various lighting
conditions. Keyboard overlays are color-coded to indicate the functions performed or characters typed when the
color-coded key is pressed immediately after the Red or Blue Modifier key.
For a complete overview of each keyboard, see Using the Keyboards on page 6-1.
Microphone
Dolphin 7900 terminals feature an integrated microphone that provides audio input to the terminal when a headset
is not plugged into the audio jack. When a headset is plugged in, the terminal defaults to the microphone on the
headset. For more information,
see Headset Control on page 7-5.