HARRIS CORPORATION TR-0054-E Manual Do Utilizador
MM-013994-001, Rev. Ap1
49
8.18.1 Clear
Mode
The Clear Mode is a voice mode in which the radio transmits and receives only clear (analog) voice
signals. These analog signals are non-digitized and non-encrypted. Clear mode transmissions can be
monitored easily by unauthorized persons.
signals. These analog signals are non-digitized and non-encrypted. Clear mode transmissions can be
monitored easily by unauthorized persons.
Groups or channels programmed for clear operation cannot transmit or receive digital or
private messages.
private messages.
8.18.2 Digital
Mode
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 or
channels 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.
improved weak signal performance and cannot be easily monitored with a standard receiver. Groups or
channels 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 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.
8.18.3 Private
Mode
The Private Mode allows the radio to transmit encrypted messages and receive clear or private
transmissions. The radio transmits private if the group/channel 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.
transmissions. The radio transmits private if the group/channel 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/channel 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.
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/channel 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 or channel 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 or channel is programmed for auto-select capability, the
mode may be toggled between private and clear with the
Private Mode is enabled. If the selected group or channel 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.