Digital Alarm Clock
(277-0107)                 Operation                  Faxback Doc. # 18013

When power is initially applied, both real time and alarm time will be at
12:00:00.  To activate the clock, simultaneously depress the "Hours Set"
pushbutton switch, S4, and the "Ten Minutes Set" pushbutton, S5. The units
minute digit can be advanced at a 2Hz rate by again depressing both the
"Hours Set" and "Ten Minutes Set" pushbuttons.  The tens minute digit will
advance at a 2 Hz rate when only the "Ten Minutes Set" pushbutton is
depressed; similarly, the hours digit will be advanced by depressing only
the "Hours Set" pushbutton.  The carry from one digit to the next does
occur, so setting should be performed from the minutes digits to the hours
digits.

When the "Time Selector" switch is in the Alarm Set mode, the alarm is
displayed and may also be advanced using the time set procedure.  In the
Real Time mode the real time is displayed and may also be advanced using
the same procedure.  To accurately set the time to the nearest second,
place the "Time Selector" switch in the Count Inhibit mode; this will halt
the counting of the clock.  After setting the time ahead, the clock
should then be returned to the Real Time mode at the proper time in order
to re-start the clock.

If a "brown out" occurs, the AM/PM indicator will flash at a 1 Hz rate to
signify an incorrect display time.  This low power indication continues
until proper power is restored and the clock is reset.

The "Alarm Enable" switch enables the "wake up" alarm.  When alarm occurs
it may be disabled and immediately reenabled and will activate 24 hours
later at the alarm time.

The "Snooze" feature will temporarily turn off an activated alarm signal
to allow an additional 10 minutes sleep.  Momentarily depressing the
"Snooze" pushbutton will activate the snooze.

The intensity of the digital displays is controlled automatically by the
photocell according to ambient lighting conditions.


(TK/all-11/28/95)