NCR 6932-2202-9090, Руководство пользователя

Страница: 14 / 60

1-4 Product Overview
Speaker
The programmable speaker provides audible key clicks and error tones for feedback in
both integrated and modular configurations. Keyboards are often located remotely from
the POS terminal. Thus, an integrated keyboard speaker is important for maximum
productivity.
The following table shows the speaker characteristics.
Characteristic Standard
Resonant Frequency 600 ± 20% Hz
Frequency Range 600 to 20,000 Hz
Power Rating 0.5 W
Sound Pressure Level
(at the power level of 0.5 W and the
distance of 0.5 meter) 85 ± 2 dBA
(at 0.8 kHz, 1.0 kHz, 1.2 kHz, and
1.5 kHz)
Note: The user programmable speaker tone function on the USB keyboards is not
supported when the keyboard is connected to a standard PC. The standard PC keyboard
voltage tolerance is not sufficient to handle the extra power requirements of the
programmable speaker tone. Only the default key click and error tones are supported
on a PC.
System Status Indicators
This feature provides the present state of the keyboard. The indicator is a dual color
Red/Green LED. A signal from the keyboard microcontroller selects the status of the
LED.
The following table explains the LED colors and their corresponding status indication.
LED Color Description
Green The system is generally working properly
Off The system is Off.
Alternately
Flashing
Green and
Red The keyboard is in the special PC SETUP mode.
Note: In PC SETUP mode, the keyboard is used to run PC
setup routines such as PC BIOS and other configuration or
diagnostics software.