1.3 Turning the Power On/Off
The power switch is combined with the [VOLUME] control. Turn the [VOLUME] control clockwise until you hear a click. Further clockwise rotation of the control raises the loudspeaker volume. To turn off the power, turn the control fully counterclockwise until you hear the click.
1.4 Adjusting the Backlighting
The [
/9] key adjusts the backlighting for the operation display and the keyboard. Each time the key is pressed, the backlighting changes in the sequence of high, medium, low and off.
1.5 Turning the Loudspeaker On/Off
When you are using a handset and therefore do not require the internal or external loudspeaker,
you can turn it off by pressing the loudspeaker [
/4] key. The “loudspeaker off mark” ( 
) appears.
1.6 Turning the Squelch On/Off
The squelch mutes the audio output in the absence of an incoming signal. Each time [SQL/5] is pressed, the squelch is turned on or off. When radio noise is too jarring during
Note: The squelch is disabled on the class of emission TLX or FAX; “SQ” blinks.
1.7 Selecting Class of Emission, Turning AGC On/Off
Selecting class of emission
The [MODE/1] key selects the class of emission. Each time the key is pressed, the class of emission changes in the sequence of LSB, J3E, H3E, TLX (J2B) and FAX (F3C).
Indication | Symbol | Class of Emission |
LSB* | J3E | Single Sideband radiotelephony(LSB) |
J3E | J3E | Single Sideband radiotelephony(USB) |
H3E | H3E | Equivalent to AM radiotelephony. Only at 2182 kHz for |
|
| transmitting, any frequency for receiving. |
TLX* | J2B | Radio Telex |
FAX* | F3C | Reception of weather facsimile broadcast |
*Available with system setting by FURUNO authorized service agent.