Motorola ASTRO APX MOBILE O2 CONTROL HEAD, User Manual

Page: 97 / 142

Advanced Features
English
79
Selecting an Encryption Key (Conventional Only)
Procedure:
1
>
or
<
(on the keypad mic.) to
Key
.
2 Press the Menu Select button directly below
Key
. The
display shows the last user-selected and stored encryption
key, and the available menu selections.
3
D
or
U
to scroll through the encryption keys.
OR
Use the keypad to enter the number of the desired key.
4 Press the Menu Select button directly below
Sel
to save the
newly selected key and return to the Home screen.
OR
Press
H
, the PTT button, or the Menu Select button directly
below
Exit
to exit.
Note: If the selected key is erased, a momentary keyfail tone
sounds and the display shows
Key fail
.
OR
If the selected key is not allowed, a momentary illegal
key tone sounds and the display shows
Illegal key
.
Enabling Secure Transmission
Procedure:
1
>
or
<
(on the keypad mic.) to
Sec
and press the Menu
Select button directly below
Sec
. The display shows
m
and
the current key if multi-key has been enabled.
2 Monitor the mode to be sure it is not in use.
3 Press PTT button to transmit.
Note: If the selected channel is preprogrammed for clear-only
operation – when you press the
PTT button, an invalid
mode tone sounds and the display shows
Clear Tx
only.
The radio does not transmit until you disable the secure
mode.
The radio can be configured to ignore the clear voice or
insecured transmission when the radio is in secured
transmission. Check with your agent for details.