NCR 6932, Руководство пользователя, Страница: 19 / 108

Product Overview 1-7
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.
Extra Ports
An extra USB port underneath the USB keyboard allows customers to connect any +5V
USB peripheral device that uses 100 mA or less of current.
When the keylock is in “L” position, the extra USB port, MSR, and glide pad are all
disabled by default, and can be enabled by flash configuration option.
Note: When the keyboard disables the extra USB port, the keyboard cuts OFF the USB
power bus; therefore, when a self–powered USB device is attached to the extra USB
port, the device may not be disabled.