Squelch level setting

The squelch circuit mutes the received audio signal depend- ing on the signal strength. The receiver has 9 squelch levels, a continuously open setting and an automatic squelch setting.

While pushing and holding [SQL], rotate [R-DIAL]to se- lect the squelch level.

“LEVEL 1” is loose squelch and “LEVEL 9” is tight squelch.

“AUTO” indicates automatic level adjustment with a noise pulse count system.

“OPEN” indicates continuously open setting.

[R-DIAL]

 

 

-DUP TSQL AFC

 

 

 

MODE FM ANL

 

146 010

SQL

 

 

 

 

 

PSKIP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SQUELCH:AUTO

 

 

Automatic squelch

-DUP TSQL AFC

MODE FM ANL

146 010

PSKIP

SQUELCH:LEVEL9

Maximum level

BASIC OPERATION 4

Monitor function

This function is used to listen to weak signals without disturb- ing the squelch setting or to open the squelch manually even when mute functions such as the tone squelch are in use.

4

Push and hold [SQL] to monitor the operating frequency.

The 1st segment of the S-meter blinks.

-DUP TSQL AFC

MODE FM ANL

146 010

PSKIP

SQL

The 1st segment blinks

The [SQL] key can be set to ‘sticky’ operation in expanded set mode. See page 54 for details.

18

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Icom IC-R20 Squelch level setting, Monitor function, Push and hold SQL to monitor the operating frequency