20
Basic Radio Operation
Transmitting on Trunked Systems
Follow these steps to transmit on a trunked system:
1
Select a desired zone and mode (see page 17).
Note:
If no secure voice modes
are available for a transmission,
the display shows
NO SEC
.
You must switch to a clear mode or wait
until a secure voice channel is available before you can
transmit.
When you hear a transmission, use the
Volume Knob
to adjust
the volume to a comfortable listening level if necessary.
2
Press and hold the
PTT
button to transmit.
Speak clearly into the microphone.
The red LED lights steadily when the radio is transmitting.
3
Release the
PTT
button to receive.
Notes:
If you hear a busy (“bah-bah-bah-bah”) signal, release the
PTT
button. You hear a “di-di-dit” (“call-back”) tone. You
have three seconds to transmit before you hear another
busy signal.
If transmission is not possible for some reason, you hear a
continuous, low-pitched (“talk prohibit”) tone. Your radio may
be out of range.
Summary of Contents for Astro XTL 1500
Page 1: ...User s Guide ASTRO XTL 1500 Digital Mobile Radio ...
Page 2: ......
Page 8: ......
Page 16: ...ix Notes ...
Page 30: ...14 Getting to Know Your Radio Notes ...
Page 38: ...22 Basic Radio Operation Notes ...
Page 68: ...52 Conventional Features Notes ...
Page 94: ...78 Troubleshooting Notes ...
Page 104: ...88 Glossary Notes ...
Page 110: ...94 Commercial Warranty and Service Notes ...
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