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1.7 Transmitting
Press the PTT (Press-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.
1.8 Selecting Output Power
Each press of the [HI/LOW] key selects HI or LOW output power.
LOW appears when low power is selected. The transmitter power
is automatically set for low on the following channels:
International: CH15, CH17
USA: CH13, CH15, CH17, CH67; to operate USA chan-
nel 13 or 67 in high power, keep [HI/LOW] pressed
while talking into the handset.
1.9 Turning the Loudspeaker On/Off
To turn the loudspeaker on/off, press the VOLUME control. The
loudspeaker off mark appears when the speaker is off. The loud-
speaker is automatically turned off when the telephone handset is
used on semi-duplex channels.
1.10 Automatic Selection of CH16
Press the [CH16] key to select CH16, the International Calling and
Safety Channel. The use is limited to distress, safety and calling.
The transmission on CH16 (156.800 MHz) should be limited to
within 1 minute except for distress calling.
Avoid calling on CH16 for purposes other than distress, urgency
and very brief safety communications when another calling chan-
nel is available.