Terminal Components QTERM-G55 Terminal
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Qlarity-Based Terminal Hardware
The QTERM-G55 may be optionally equipped with a color QVGA, 320x240 pixel,
active-matrix TFT LCD (256 colors). It also uses a light emitting diode (LED) backlight, with
a typical brightness of 200 nits.
3.3.2 Keypad
User input occurs through a rugged 24-key or 40-key membrane keypad with steel snap
domes. The top row of keys a commonly used as soft keys to navigate through a set of chang-
ing menus at the bottom of the display. The standard keypad comes with four or five LEDs
under the soft keys that can be used as status or alarm indicators. Power and shift buttons with
LEDs are included on both keypad configurations. The power button puts the terminal into a
sleep mode for low power consumption and provides instant-on function with no loss of pro-
gram state.
The 40-key keypad allows for function / softkeys, eight-way directional control and numeric
entry in the unshifted mode and alphanumeric data entry in the shifted mode. Keys can per-
form alternate functions when the shift key is enabled. The power and shift functions can be
enabled or disabled in software.
The keypad legend can be customized with your logo/name and custom keys.
3.3.3 Speaker
A speaker is built into the QTERM-G55 terminal and faces to the back of the unit. Audio can
be linked to events or actions (e.g., screen press, timer, etc.). Pitch and duration of a sound are
controlled by API functions called from the user application. Refer to “Controlling the
Speaker” section in the Qlarity-based Terminal Programmer's Reference Manual. Newer mod-
els also include a course volume control that is accessible via software.
Optionally, an audio (.wav) decoder can be added to the QTERM-G55 to allow the speaker to
play audio files. The audio decoder supports wave files meeting the following criteria:
• Sample rate of 8 kHz, 11.025 kHz, 16 kHz or 22.050 kHz
• Resolution of 8 or 16 bits per sample.
The audio decoder circuit amplifies the signal to 0.5 W rms at the speaker.
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