8
SELECTING A PRIVACY CODE
Continuous Tone Coded Squelch System (CTCSS) and Digitally Coded Squelch (DCS) are systems that
allow several users to share the same channel without disturbing each other. When CTCSS or DCS are
enabled for a selected channel, the channel is muted to all incoming signals unless they carry the correct
CTCSS or DCS tone.
When a transmission with the correct tone is received, the mute is removed, and the voice audio can be
heard. When the transmission ends, the channel is muted again. Transmissions that do not have the
correct tone are not heard.
The MXT575 has 142 Privacy Codes (38 CTCSS codes and 104 DCS codes), which can be applied to any
channel. If desired, you can select a different Privacy Code for each channel. See CTCSS Privacy Codes
Frequency Chart and DCS Privacy Codes Chart for lists of available Privacy Codes.
IMPORTANT! To communicate between two MXT575 radios or any GMRS radio, both radios must be set
to the same channel (see SELECTING AN ACTIVE CHANNEL) and privacy code selections.
NOTE: The MXT575 can have separate privacy codes for receiving and transmitting on repeater
channels.
To set the privacy tone for standard channels:
1. Press the MENU button to enter the menu. Use the VOLUME buttons to navigate to menu
setting “Pt”.
2. To edit the privacy codes, press the LOCK button. Use the VOLUME buttons to choose between
“of”, “Ct”, or “dC”.
•
“oF” – privacy codes are disabled
•
“Ct” – CTCSS privacy codes (see CTCSS PRIVACY CODE CHART)
•
“dC” – DCS privacy codes (see DCS PRIVACY CODE CHART)
3. Use the VOLUME buttons to navigate through the privacy tone options. Press the LOCK button
to confirm your selection. YOU MUST PRESS THE LOCK BUTTON TO CONFIRM YOUR SELECTION
OR THE PRIVACY CODE WILL NOT BE CHANGED.
The CTCSS and DCS icons and code number will show on the LCD display, according to
your selections.
To set the privacy tones for repeater channels:
1. See REPEATER CHANNELS section and enable repeater channels.
2. Press the MENU button to enter the menu. Use the VOLUME buttons to navigate to menu
setting “rC” (receive privacy tones) and “tC” (transmit privacy tones).
3. To edit the privacy codes, press the LOCK button. Use the VOLUME buttons to choose between
“of”, “Ct”, or “dC”.