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CHAPTER 4. LED & BUTTON
4.1. Front Panel
4.2. LED & Buzzer
A buzzer function of a display device is for users to operate it with convenient as it takes place
“Beep” sounds whenever each buttons were pressed.
Besides, it is designed for the users to recognize “alarm warning” easily as the function was
distributed to the buzzers when the Alarm Warning happens.
LED FUNCTION
SECTION
ARM
(ALARM)
LED to show alarm function and it
appears when receiving characters
having correlation with alarms.
RED LED
INT
(INTERNATIONAL)
It appears an international broadcast
receiving (English) and turns on and off
from phase-locked time to receive-
ended time.
YELLOW LED
LOC
(LOCAL)
It appears a Local language receiving
and turns on and off from phase-locked
time to receive-ended time.
GREEN LED
