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Operation
Setting the DCS advanced digital code
Each channel also has 83 digital codes to let you set up user groups for more
secured private communication.
1. Press the MENU key 3 times. The DCS code flashes on the LCD screen.
2. Press the UP or DOWN key to select the desired DCS code.
3. Press PTT key to confirm the DCS setting.
Note When you have set the DCS code, CTCSS will automatically set to off mode.
Transmitting and receiving
The TwinTop 400/400-L transmission is “one way-at-a-time.” While you
are speaking, you can not receive a transmission.
The TwinTop 400/400-L is an open-license band. Always identity yourself
when transmitting on the same channel.
Transmitting (sending a speech)
The unit is continuously in the receive mode when is switched ON and not transmit-
ting. When a signal is received on the current channel, “RX” is displayed on the LCD
screen and the receiver LED lights up.
1. Press and hold the PTT (push to talk) key to transmit your voice.
“TX” is displayed on the LCD screen.
2. Hold the unit in a vertical position with the MIC (Microphone) 5 cm
away from your mouth. While holding the PTT key, speak into the
MIC (microphone).
3. Release the PTT key when you have finished transmitting.
Monitor
You can use the Monitor feature to search for weak signals on the current channel.
1. Press the MENU and DOWN keys at the same time, “RX” is displayed
on the LCD screen. Your TwinTop 400/400-L picks up signals on the
current channel, including background noise.
2. Press the PTT key to stop channel monitoring.
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