![](/images/new-backgrounds/1266582/26658241x1.webp)
— locks/unlocks the keypad to prevent accidental en- tries.
LIGHT — turns on/off the display’s backlight.
Number Keys — use these keys to enter the numbers for a channel or frequency.
MON/0 — enters a zero or accesses the monitor memory.
DLY/• (delay/decimal point) — programs a
21