Tyco Electronics P5200 사용자 설명서

101 

If the cryptographic key(s) are zeroed, one or more keys must be transferred from the Keyloader into the 
radio before private communications may continue. 

When receiving, the radio automatically switches between clear or private operation. If the transmission 

being received is an encrypted transmission, it will be decrypted, the   icon is displayed, the receiver will 
unsquelch and the message will be heard in the speaker. For this to occur the selected group or channel 
must be programmed for private operation and the correct cryptographic key must be loaded into the 
radio. 

1.  Select the desired group or channel. 

2.  Place the radio in Private Mode by pressing 

 key, 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. 

3.  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. 

4.  Continue with standard transmission procedures. A Private Mode access tone will be heard when the 

PTT button is pressed. 

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. 

CLEAR Yes No No 

DIGITAL Yes Yes No 

PRIVATE Yes  No Yes* 

*assumes the proper cryptographic key is loaded