User's Guide

16
Radio Firmware Features
9.2.1.1 TPL Encode
Conventional channels in the radio with activated Tone Private Line
settings transmit with the selected Tone Private Line code (transmit
TPL).
If TPL is selected, the radio will transmit the TPL code on the selected
conventional personality.
The TPL code determines which code the conventional personality
will transmit.
9.2.1.2 TPL Decode
Receive TPL is used upon detection of a sub-audible tone that is
used in the unmuting rules of the radio. When the radio decodes the
correct TPL sub-audible tone that is being continuously modulated
onto the carrier, the radio uses this information in determining if the
speaker should be unmuted.
The Rx TPL code determines which code the conventional
personality will attempt to decode & unmute the radio.
9.2.2 Digital Private Line (DPL)
DPL is a Motorola term for CDCSS. DPL is a digital format
transmitted along with the carrier. DPL gives more use and privacy on
a frequency.
DPL is selectable from the CPS for individual personality. Each
personality can have different Squelch type for transmit and receive.
9.2.2.1 DPL Encode
Transmit DPL is the modulation of a sub-audible code on a carrier
frequency. The sub-audible code is summed with microphone audio
prior to modulation.
If DPL is selected, the radio will transmit DPL code on the selected
conventional personality.
The DPL code determines which code the conventional personality
will transmit.
PM1200.book Page 16 Thursday, June 21, 2007 3:58 PM