HARRIS CORPORATION TR-0054-E Manual Do Utilizador

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Groups or channels programmed for clear operation cannot transmit or receive digital or 
private messages. 

The Digital Mode allows the radio to transmit and receive digitized voice signals.  Digital signals provide 
improved weak signal performance and cannot be easily monitored with a standard receiver. Groups 
programmed for digital operation transmit only digital signals.  Message trunked group calls and 
individual phone calls (I-Calls) are answered back in the mode in which they were received assuming the 
call or hang time is still active.  Individual phone, all call, and emergency calls are transmitted clear if the 
digital mode is disabled or inoperative. 

1.  If receiving an analog message trunked call, the radio responds in the analog mode during the hang 

time on the working channel. 

2.  If receiving an analog I-Call, the radio responds in the analog mode during the hang time. 

3.  When using the 

*WHC*

 feature to respond to an I-Call (after the hang time has expired), the call is 

transmitted in the mode defined by the system mode as programmed for the current system if the ID 
being called is not in the I-Call list.  If the ID is in the I-Call list, then the call is transmitted as defined 
by the I-Call mode programmed in the list for that ID. 

The overdial DTMF tones are not available while in the Digital Mode. 

The Private Mode allows the radio to transmit encrypted messages and receive clear or private 
transmissions.  The radio transmits private if the group is programmed for private operation and forced 
operation is pre-programmed.  If auto-select operation is pre-programmed and the radio is in the Private 
Mode, the radio transmits in the mode of the received call if the hang time is active.  If no hang time is 
active, the radio transmits private.  

Cryptographic keys are transferred to the radio using a cryptographic Keyloader.  Up to seven (7) 
different cryptographic keys, numbered 1-7, can be transferred from a Keyloader and stored in the radio.  
An individual key is automatically selected on a per-group basis according to the radio programming. 
Groups and channels within the digital system can be programmed for keys 1-7 (private).  Up to 8 banks 
of 7 keys can be stored for private systems.  The bank is specified per system.  

When operating on a group programmed for Private Mode, all transmissions are private transmissions and 

the radio receives clear and private signals.  The status icon   is displayed when the Private Mode is 
enabled.  If the selected group is programmed for auto-select capability, the mode may be toggled 
between private and clear with the 

 key, then following the selection mode rules.  Radios programmed 

for forced private operation do not allow a change of the transmit mode. 

To display the currently used Cryptographic Key Number for either the system encryption key (for 
special call such as individual, phone, all, agency or fleet) or the group key (for group calls), perform the 
following procedure: 

1.  Press the 

 button. 

2.  Use the 

 or 

 button to select "DISP KEY."