ICOM 339300 Manuale Utente

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PANEL DESCRIPTION

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q  POWER SWITCH/AF VOLUME [PWR]/[AF]  

(p. 44)

Push to turn ON the transceiver power.

 

➥

 

 

• First, confi rm the DC power source is turned ON.

Hold down for 1 second to turn OFF the power.

 

➥

 Rotate to adjust audio output level.

 

➥

Increases

Decreases

w  RF GAIN CONTROL/ SQUELCH CONTROL 

 (p. 44)

   Rotate to adjust the RF gain and squelch threshold 

level.

   The squelch removes noise output to the speaker 

when no signal is received. (closed condition)

 • 

 

The squelch is particularly effective for AM and FM, but 
also works in other modes.

 • 

 

The 12 to 1 o’clock position is recommended for the most 
effective use of the [RF/SQL] control.

 • 

 

[RF/SQL] operates as only an RF gain control in SSB, 
CW and RTTY (Squelch is fi xed open), or a squelch con-
trol in AM, FM and DV (RF gain is fi xed at maximum sen-
sitivity), when “Auto” is selected as the “RF/SQL Control” 
item in the “Function” Set mode. (p. 162)

 

 

SET

 > Function > RF/SQL Control

Maximum 
RF gain

S-meter 
squelch

Noise squelch (FM/DV modes)

Squelch is 
open.

RF gain 
adjustable
range

Recommended level

(Squelch is fi xed open; SSB, CW and RTTY only)

Minimum RF gain

Adjustable
range

Maximum 
RF gain

While rotating the RF gain control, a faint noise may 

be heard. This comes from the DSP unit and does 
not indicate an equipment malfunction.

(RF gain is fi xed at maximum.)

Squelch is 
open.

S-meter 
squelch

S-meter squelch
threshold

Noise squelch 
threshold 
(FM mode)

Shallow

Deep

Noise squelch (FM/DV modes)

➔

i7100

w

q