Power and Power Management Powered by a commonly available 9-volt alkaline battery and internally regulated to 5 volts for consistent performance throughout the life of the battery. Keypad is placed in sleep mode between questions to conserve battery life. Keypad will totally shut down after a period of inactivity. Inactivity shut down is programmable. Low battery is indicated by the rapidly flashing seven-segment LED display when an hour or less of battery life is left.
Keypads operate independently of each other, and keypad addresses are programmable.
This feature allows a user to input an identifier up to 10 digits, such as an employee number. This input is compared to the host system's roster to ensure that the user's entry is valid and, if so, to authorize recording all responses from that keypad to the user's record. Response entries are acknowledged when received by the System Controller. Integrated error checking ensures accurate communication of responses and control functions. This receiver is dual conversion crystal referenced frequency modulated.