Tyco Electronics M/A-COM MM23016 - Manual (Page 53)

MM23016, Rev. C
53
8.8.5.2 Transmitting an Encrypted Call
1. Select the desired group or channel.
2. Place the radio in private mode by pressing the OPT button (System Model) or OPTION (Scan
Model).
If the last state of the radio was private mode, the private mode will be enabled on power up. In
addition, 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 is programmed for forced private transmit operation, FRCD PVT will be displayed if an
attempt is made to disable private transmit mode. It is not possible to transmit on this group/channel
in clear 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.
8.8.5.3 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 auto-select, 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 auto-
select 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 in different modes (clear, digital, private), only the first
occurrence of the group will be used.
8.8.6 Conventional Operation
8.8.6.1 Outside Address
The same outside address (works similar to Channel Guard operation) must be programmed in the
transmitting and receiving radios when ProVoice digital or private operation is enabled. If address is not
correct, the radios will not communicate.
8.8.6.2 Channel Guard
Channel Guard encode is transmitted on analog clear channels only. Channel Guard decode will operate
on either a clear or private channel. The exception is when G-STAR
TM signaling is used (see G-STAR
paragraph).
8.8.6.3 G-STAR
When G-STAR is programmed on a private channel, the radio will transmit G-STAR in clear mode and
then switch to private for the voice portion of the call. If G-STAR is sent with Channel Guard, then both
are sent in clear mode and the radio switches to private mode. Emergency G-STAR data burst is
transmitted in clear mode.