Yaesu Musen Co. Ltd. 20523X50 ユーザーズマニュアル

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This radio is equipped with the CTCSS (Continuous Tone-coded Squelch System which 
allows audio to be heard only when receiving signals containing the same frequency tone 
as the tone that has been set in the tone squelch menu. By matching the tone frequency 
with the partner station in advance, a quiet standby monitoring is possible.
Caution: CTCSS does not function in digital mode. To transmit a signal using a CTCSS 

code, use the [

D/A(GM)] key to switch the communication mode to AMS (Auto 

Mode Select function) or analog (FM) mode.

1.  Press and hold in the [

MHz(SETUP)] key for over 1 second.

  The Setup menu appears.
2.  Rotate the 

DIAL knob to select “SQL TYPE 42”, then press the [MHz(SETUP)] key.

3.  Rotate the 

DIAL knob to select “TSQL”, then 

press and hold in the [

MHz(SETUP)] key for 

over 1 second.

  Displays “ 

 ” on the screen. The squelch opens only when receiving tone signals 

of the set frequency.

Note: From the Setup Menu, you can change the CTCSS setting.

TONE FRQ 45 à  The tone frequency can be selected from 50 frequencies.
BELL 6 

à

  A bell tone (beep) may be set to sound when signals containing 

a corresponding CTCSS tone are received.

In operating situations where you don’t know the CTCSS tone being used by another 
station or stations, you can command the radio to listen to the incoming signal and scan 
in search of the tone being used.
Note: For details, refer to the Advanced Manual (download from the Yaesu website).

This radio is equipped with a DCS (Digital Coded Squelch) function that allows audio to 
be heard only when signals containing the corresponding DCS code are received. By 
matching the DCS code with the partner stations beforehand, a quiet receive standby is 
possible.
Caution: DCS does not function in digital mode. To transmit a signal with a DCS code, 

use the [

D/A(GM)] key to switch the communication mode to AMS (Auto Mode 

Select function) or analog (FM) mode.

1.  Press and hold in the [

MHz(SETUP)] key for over 1 second.

  The Setup menu appears.
2.  Rotate the 

DIAL knob to select “SQL TYPE 42”, then press the [MHz(SETUP)] key.

Application for FCC / IC 

FCC ID: K6620523X50 / IC: 511B-20523X50