RT-1523E (ASIP) KEYBOARD
1) Six keys of ASIP keypad are redesignated
2) SA, CID and GPS keys are not used.
3) RCU key enables use of ASIP RT as an RCU.
4) MENU key scrolls athrough MENU selections.
5) FREQ/Backlight key controls backlight brightness.
RT must be In SO ON and CHG scrolls level.