Installation Instructions

Page 15
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Model MXT400
▪ The TX Indicator will show continuously on the LCD display while
transmitting.
3. To receive a call, release the PTT button on the microphone.
▪ The Busy icon will show on the LCD display when your radio is
receiving a transmission.
4. If necessary, rotate the Volume Knob to increase or decrease radio
volume.
Locking the Keypad
You can use the keypad “lock” function to prevent accidentally changing
your radio’s settings. When the function is enabled, the current radio
settings are “locked” in place.
NOTE: When the “lock” function is enabled, the PTT button on the
microphone and the Volume Knob on the radio remain active.
To “lock” and “unlock” the keypad:
1. Be sure the radio is turned on (see Power On/Off)
2. Press and hold the Call button.
▪ The Keypad Lock icon will show on the LCD display when the
keypad is “locked.”
3. Repeat steps 1 and 2 to “unlock” the keypad.
▪ The Keypad Lock icon will turn off when the keypad is
“unlocked”
Using Monitor Mode
Monitor mode lets you check for activity on the current active channel. You
can also use Monitor mode to adjust the volume of your radio when not
receiving a signal.
To enter and exit Monitor mode:
1. Be sure the radio is turned on (see Power On/Off)
2. Be sure you have selected the desired channel (see Selecting the
Active Channel)