Manual Standard Horizon MATRIX - GX1280S (page 23 of 74) (English)

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GX1280S Page 23

6 BASIC OPERATION

6.1 RECEPTION

1. After the transceiver has been installed, ensure that the power supply

and antenna are properly connected.

2. Press and hold the VOL/PWR knob until the radio turns on.

3. Turn the SQL knob fully counterclockwise. This state is known as “squelch

off”.

4. Turn up the VOL/PWR knob until noise or audio from the speaker is at a

comfortable level.

5. Turn the SQL knob clockwise until the random noise disappears. This

state is known as the “squelch threshold.”

6. Turn the CHANNEL selector knob to select the desired channel. Refer

to the channel chart on page 62 for available channels.

7. When a message is received, adjust the volume to the desired listening

level. The “BUSY” indicator in the LCD is displayed indicating that the

channel is being used.

6.2 TRANSMISSION

1. Perform steps 1 through 6 of RECEPTION.

2. Before transmitting, monitor the channel to ensure it is clear.

THIS IS AN FCC REQUIREMENT!

3. Press the PTT (push-to-talk) switch. The “TX” indicator on the LCD is

displayed.

4. Speak slowly and clearly into the microphone.

5. When the transmission is finished, release the PTT switch.

NOTE

This is a noise-canceling microphone. The oval slot on the bottom of

microphone should be positioned within 1 inch (2.5 cm) from the mouth

for optimum performance.

6.3 TRANSMIT TIME - OUT TIMER (TOT)

When the PTT switch on the microphone is held down, transmit time is limited

to 5 minutes. This limits unintentional transmissions due to a stuck micro-

phone. About 10 seconds before automatic transmitter shutdown, a warning

beep will be heard from the speaker(s). The transceiver will automatically go

to receive mode, even if the PTT switch is continually held down. Before trans-

mitting again, the PTT switch must first be released and then pressed again.

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Standard Horizon MATRIX - GX1280S Manual

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