8
8 MaxTrac 100/300 Operation (cont.)
Standard Receive Operation (cont.) /
Standard Transmit Operation
Low–Band Extender Feature
Low-band radios include an extender circuit, whose function is to blank out
interfering noise pulses commonly found in the low-band frequency range. This is
also known as a “Noise Blanker.” The extender is always enabled when the radio is
turned on. It can be disabled with an extended hold (four seconds, three chirps) of
the monitor button. On a MaxTrac 300 radio the display will indicate the extender
is disabled with a dash (—). To enable the extender function again, press the
monitor button as before (four seconds, three chirps).
Standard Transmit Operation
Transmitting
Do not transmit if anyone else is using the channel. The busy LED (Bsy on
MaxTrac 100 radio or Tx/Bsy on MaxTrac 300 radio) will flash if there is another
carrier on the channel. If the channel is clear, press the PTT (push-to-talk) button
on the side of the microphone. On the MaxTrac 100 radio, the channel indicator
LED (F1 or F2) will turn red to indicate that you are “on the air.” On the MaxTrac
300 radio, the transmit LED (Tx/Bsy) will light steadily to indicate that you are “on
the air.”
Hold the microphone about 2 inches from your mouth and speak at a normal
voice level. DO NOT SHOUT. It will not make your transmission clearer.
Time-Out Timer Feature
All models have a time-out timer (TOT) that will terminate your transmission if you
hold the PTT button down for 30 seconds (default setting). To warn the user, an
alert tone will sound from the speaker for about 4 seconds before the
transmission is terminated. The time-out timer can be disabled or changed in
duration (up to 255 seconds) via radio service software (RSS).
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