West Marine VHF580 사용자 설명서

17

(see inside front cover) 

Turn the volume knob clockwise to increase the speaker volume; turn it counter-clockwise to 

decrease the volume. 

The squelch feature reduces the level of static on the speaker by filtering out the background 

channel noise. At the lowest squelch level, the speaker plays all radio signals, including any 

noise on the channel. Setting the squelch level higher filters out channel noise and lets only 

actual radio transmissions through.  

While listening to a channel, adjust the SQUELCH knob until the noise is filtered out and you 

can only hear the transmission. If you switch to a channel with a lot of noise or with a weak 

transmission, you may need to adjust the squelch level again. 

#

Press 

 and 

 briefly to scroll through the channels one channel at a 

time. Press and hold 

 or 

 to quickly scroll through the channels. 

To make a transmission, press and hold the microphone 

 button. Release the 

button when you’re finished talking to let the other party respond. 

 x

To prevent stuck microphone problems or situations where 

is pushed 

accidentally, the radio limits your talk time to 5 minutes in a single transmission. If you 

talk for over 5 minutes continuously, the display shows RELEASE MIC BUTTON. 

 x

For the best sound quality, hold the microphone about two inches away from your mouth. 

 x

You cannot transmit while the radio is in weather mode or scan mode. 

 x

See the channel lists beginning on page 

 for a list of receive-only channels. 

Weak signals

No 

Squelch

Medium 

Squelch

High 

Squelch

Strong signals

Noise