Furuno FM-8800D - Manual (Page 21)

1. OPERATIONAL OVERVIEW
1-9
1.2.4 Adjusting squelch
The SQUELCH control adjusts the squelch threshold level. Adjust it so that white
noise heard in the loudspeaker just fades out. Perform this operation when no
traffic is being received. AUTO squelch automatically reduces white noise.
Usually select the AUTO position. Avoid turning the squelch too far clockwise —
you may miss a long distance communication.
Note: To obtain correct scan watch/dual watch response, adjust the SQUELCH
control precisely.
1.2.5 Transmitting
Press the PTT (Push-to-talk) switch on the handset or microphone to talk, and
release it to listen for the response. The VHF section keyboard accepts no key
input when the PTT switch is operated.
Remarks on transmitting
• Before transmitting, think about the subjects which have to be communicated
and, if necessary, prepare written notes to avoid unnecessary interruptions
and ensure that no valuable time is wasted on a busy channel.
• Listen before commencing to transmit to make certain that the channel is not
already in use.
1.2.6 Selecting output power
After pressing the SHIFT key, each press of the 0 HI/LO key selects high or low
output power. Also Hi or Lo appears on the screen depending on your selection.
The transmitter power is automatically set for low on the following channels:
International: CH15, CH17, CH75, CH76
USA:
CH13, CH17, CH67, CH77; to operate USA channel 13 or 67 in
high power, keep HI/LOW key pressed while talking into the
handset.
1.2.7 Turning the loudspeaker on/off
To turn the loudspeaker on/off, press the SHIFT key, then the 1 key. See section
4.8 to set loudspeaker on or off according to handset onhook or offhook.