Furuno LH-3000CG Manuale Utente

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2. OPERATION 
 
11
2.3  Adjusting Key Backlighting 
You may adjust the intensity of the key backlighting cyclically with the [DIM] key, in five 
levels, including off. 
 
 
2.4  Adjusting Output Level 
Turn the [HAIL VOL] control to adjust the output volume from the horn speakers or intercom 
speakers. Clockwise rotation increases volume; counterclockwise rotation decreases it. 
 
 
2.5  Adjusting Listening Volume 
Turn the [LISTEN VOL] control to adjust the listening volume from the Loud Hailer’s internal 
speaker and external speaker (if connected). 
 
 
2.6  Calling All Intercom Stations 
1.  In the standby mode, hold the microphone 2-3 cm from your mouth and press the PTT 
switch on the microphone. Speak into the microphone. All intercom stations and both 
horn speakers will hear you. 
2.  After speaking, release the PTT switch to return the equipment to the standby mode.   
 
Note: To call all intercom stations while sounding warning signals, see page 17.