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5 OPERATION
After the transceiver has been installed (see section 4), ensure the
power supply and antenna are properly connected.
5.1 RECEPTION
1. Turn the POWER SWITCH/VOLUME CONTROL on.
2. Turn the volume control knob to the desired level.
3. Turn the SQUELCH CONTROL knob fully counterclockwise. This
state is known as “squelch off”.
4. Turn up the volume until noise or audio from the speaker is at a
comfortable level.
5. Select a channel that has no signal being received (no one is
transmitting on the channel). Only noise should be heard.
6. Slowly turn the SQUELCH CONTROL knob clockwise and stop
immediately after the noise disappears. This condition is known as
the “Squelch Threshold”. If the SQUELCH CONTROL knob is turned
clockwise past this point, weak signals are not received. No noise
and no signals are heard until a signal is received that exceeds the
squelch threshold.
7. To change channels, press the UP or DN key. Sometimes, a slight
adjustment of the squelch threshold needs to be made, because
some channels have a higher noise level than others.
Please refer to the Owner’s Manual Supplement for a complete
listing of all USA, International and Canadian VHF Marine channels
and their usages.
5.2 TRANSMISSION
1. Perform steps 1 through 7 of RECEPTION.
2. Before transmitting, monitor the channel and make sure it is clear.
THIS IS AN FCC REQUIREMENT!
Owner's Manual
GX1250S Page 11