Short press the knob to enter the signal modulation setting.
Current signal mode: Current signal mode
Signal mode setting: Signal mode setting
EXT MOD External Modulation Input
MONO + EXT MOD Mono + External Modulation Input
EXT MOD External Modulation Input
STEREO Stereo Input
Turn the knob to adjust the signal mode setting, short press the knob to confirm the signal
mode setting. And return to menu 3 signal mode setting.
Menu 4 audio pre-emphasis settings
Short press the knob to enter the short press knob to enter the signal modulation setting.