Tyco Electronics MM23772 - Manual (Page 64)

MM23772, Rev. B
64
8.19.4.2 Transmitting an Encrypted Call
1. Select the desired group or channel.
2. Place the radio in Private Mode by pressing  key, and then follow the selection mode rules. On a
System radio, the  key can be used to toggle the Private Mode ON/OFF. When Private Mode is
enabled, the icon is displayed.
If the last state of the radio was Private Mode, the Private Mode will be enabled on power up. Also,
the Private Mode will be enabled if forced operation has been programmed in the radio.
If a group or channel is not programmed for Private Mode operation, PVT DIS will be displayed if
an attempt is made to enable private transmit mode. It is not possible to operate on this group/channel
in Private Mode.
If the radio does not have the correct encryption key loaded,
NO KEY#
will be displayed and the call
will not be transmitted.
3. Continue with standard transmission procedures. A Private Mode access tone will be heard when the
PTT button is pressed.
8.19.4.3 Scanned Group Calls
Receiving a Scanned Group Call is the same as receiving a selected group call. During the scan hang
time, if the radio was programmed for autoselect, it will transmit back in the same mode it received the
call. For example, if a clear group is entered in the scan list, it will only receive clear calls. If the same
group was available in private and entered in the scan list, it can receive clear and private calls, provided
autoselect was programmed in the radio. The user can select transmitting on the scanned or selected
group. If a group is entered in the scan list more than once and in different modes (clear, digital, private),
only the first occurrence of the group will be used.
Table 8-5: Transmit/Receive Mode Compatibility for
Digital Voice Operation
GROUP/CHANNEL
PROGRAMMING
(TRANSMIT)
CLEAR
RECEIVE
DIGITAL
RECEIVE
PRIVATE
RECEIVE
CLEAR Yes No No
DIGITAL Yes Yes No
PRIVATE Yes No Yes*
*assumes the proper cryptographic key is loaded
8.20 SCANNING TRUNKED GROUPS
Groups that have been previously added to the scan list on a per system basis may be scanned. Each
system's group scan list is retained in memory when the radio is powered OFF or when the battery pack is
removed.
8.20.1 Turning Scan On and Off
1. Toggle Scan operation ON by pressing  (Scan model) or  (System model). icon rotates
clockwise to indicate radio is scanning.
2. Toggle Scan operation OFF by again pressing  (Scan model) or  (System model). will
disappear.