Motorola XPR 5550 用户手册
Identifying Radio Controls
English
7
Push-To-Talk (PTT) Button
The PTT button on the side of
the microphone serves two
basic purposes:
the microphone serves two
basic purposes:
•
While a call is in progress,
the PTT button allows the
the PTT button allows the
radio to transmit to other
radios in the call.
Press and hold down PTT
button to talk. Release the
PTT button to listen.
The microphone is activated when the PTT button is pressed.
•
While a call is not in progress, the PTT button is used to make
a new call (see Making a Radio Call on page 22).
a new call (see Making a Radio Call on page 22).
If the Talk Permit Tone (see Turning the Talk Permit Tone On
or Off on page 68) or the PTT Sidetone
or Off on page 68) or the PTT Sidetone
is enabled, wait
until the short alert tone ends before talking.
During a call, if the Channel Free Indication feature is
enabled on your radio (programmed by your dealer), you
hear a short alert tone the moment the target radio (the
radio that is receiving your call) releases the PTT button,
indicating the channel is free for you to respond.
enabled on your radio (programmed by your dealer), you
hear a short alert tone the moment the target radio (the
radio that is receiving your call) releases the PTT button,
indicating the channel is free for you to respond.
You will also hear a continuous talk prohibit tone, if your
call is interrupted, indicating that you should release the
call is interrupted, indicating that you should release the
PTT button, for example when the radio receives an
Emergency Call.
Emergency Call.
Switching Between Conventional Analog
and Digital Mode
Each channel in your
radio can be
configured as a
conventional analog or
conventional digital
channel.
radio can be
configured as a
conventional analog or
conventional digital
channel.
To switch between an analog or a digital channel, use the
•
Scroll Up/Down buttons, or
•
Volume/Channel Knob, or
•
programmed Channel Up or Channel Down buttons
When switching from digital to analog mode, certain features
are unavailable. Icons for the digital features (such as
Messages) reflect this change by appearing ‘grayed out’.
Disabled features are hidden in the menu.
are unavailable. Icons for the digital features (such as
Messages) reflect this change by appearing ‘grayed out’.
Disabled features are hidden in the menu.
Your radio also has features available in both analog and digital
mode. However, the minor differences in the way each feature
works does NOT affect the performance of your radio.
NOTE: Your radio also switches between digital and analog
mode. However, the minor differences in the way each feature
works does NOT affect the performance of your radio.
NOTE: Your radio also switches between digital and analog
modes during a dual mode scan (see Scan on
page 32).
page 32).
PTT Button
Scroll Up/Down
Volume/Channel Knob