Motorola MaxTrac 300 Operating Instructions

Operating Instructions for the Motorola
MaxTrac 300™ 6-Frequency Conventional FM Radio
ON/OFF
VOLUME
MICROPHONE
CONNECTOR
To turn the radio on
Turn the ON/OFF VOLUME knob to the right until it clicks. A tone will be heard. Only those
LEDS indicating the last status of the radio will light.
To receive
Set the volume by turning the ON/OFF VOLUME knob clockwise. One half turn equals about
50% audio output.
Select the channel by pressing either the MODE up or MODE DOWN button. The channel num-
ber will be displayed. An extended hold of either button will allow you to scroll through all
active channels in ascending and depending order.
If you wish to monitor a channel, push the MONITOR button to disable coded squelch. You may
also enable the monitor function by taking the microphone off the hook. When in the monitor
mode, the amber MONITOR INDICATOR LED will light steadily.
To unsquelch the radio, press the MONITOR button for 2 seconds. This unmutes the speaker.
Adjust the volume by using the ON/OFF VOLUME knob.
To leave the unsquelched mode, press the MONITOR button. This will return the radio to coded
squelch operation. To return to the monitor mode, press the MONITOR button again.
When you press a button to change modes, you will hear a short chirp tone.
NOTE: Lowband Radios include an EXTENDER circuit whose function is to blank out interfer-
ing noise pulses commonly found in Lowband. The EXTENDER is always enabled when
the radio is turned on. It can be disabled (or enabled again) with an extended hold (4
seconds, 3 chirps) of the MONITOR button.
To transmit
The red TRANSMIT/BUSY INDICATOR will flash if there is another carrier on the channel. Do
not transmit if anyone else is using the channel. If the channel is clear, press the PTT (push to
talk) button on the side of the microphone. The TRANSMIT/BUSY INDICATOR will light steadily
to indicate that you are "on the air". It will remain lit until the PTT button is released.
NOTE: The radio has a Time-out-timer (TOT) that will terminate your transmission if you hold
the PTT button down for 30 seconds. Before this occurs, an alert tone comes from the
speaker about four seconds before the transmission is cut.
NOTE: A continuous (5-second) warning tone may be heard instead of the chirp tone nor-
mally heard at power-up. This is an indication that the radio is no longer operating at
the exact parameters set in the factory or field, and should be serviced immediately.
MODE TRANSMIT/
UP BUSY LED
Insert:
MAEPF-26185-O
MODE MONITOR
DOWN
MONITOR
BLANKER DISABLED (SEGMET ON)
LED
(LOWBAND ONLY)
MaxTrac 300
*6880101W96*
6880101W96-B