ICP9000 Navigator Series Console Operator’s Manual
Standard Feature Operation
47
04/15
Positive Mode Control/Secure Operation
The Navigator supports positive mode control for controlling a secure-equipped base station. The
operator must control the secure mode of the console by selecting a coded or clear transmission type.
The actual encryption and decryption of audio is a function of the base station and not the console. The
console simply controls the feature.
Using Positive Mode Control
To open the secure window to access the
CODED
and
CLEAR
buttons,
press the toolbar
SECURE
button.
When the
CODED
button is pressed, the border of the
CODED
button
lights red to indicate transmit audio from the selected channel should be
encrypted by the transmitter. The status line of the information window
also displays CODED to indicate that the selected channel is now in
coded mode. The selected channel remains in this mode until the
CLEAR
button is pressed.
When the
CLEAR
button is pressed, the border of the
CODED
is extinguished and the border of the
CLEAR
button lights red to indicate transmit audio from the selected channel should no longer be
encrypted by the transmitter. The status line of the information window also displays CLEAR to indicate
that the selected channel is now in clear mode.
Coded Reception Indicator
The CODED and CLEAR
on the status line of the information window always indicate the secure state of
the selected channel and whether or not transmissions are to be encrypted by the transmitter. The
CODED
button indicator, however, serves two purposes. If a channel is secure capable, either the
CODED
or
CLEAR
indicator is lit.
However, if the console is properly configured and installed, the
CODED
indicator provides the secure
status of the last received audio on a secure channel. If the
CODED
indicator is flashing when a channel
is selected, it indicates that the last received audio on that channel was encrypted and the operator should
set the transmit secure status to the proper setting. This received transmission status is latched whether
the channel is selected or not.
To ensure that the operator selects the proper secure state for transmissions in response to a potentially
encrypted reception, the operator should always select a secure channel prior to transmitting to determine
the secure status of the last reception. Using the channel
TRANSMIT
button does not provide the
necessary information to the operator prior to responding.
Figure 21. Secure Window
