Retevis RT-628, User Manual

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by providing you a choice of code combinations. To set 

the code for a channel:

1. Press         twice, then the code starts to flash.

2. Press UP or DOWN to select the code 0-121 or 121-0.

3. Press PTT to save the code setting.

You can set a different code for each channel using 

this procedure.

Note: You must set the Interference Eliminator Code to 

          0 if you want to communicate with another radio

          which didn’t set up the Interference Eliminator 

          Code.

Push to Talk Timeout Timer

To prevent accidental transmissions and save battery 

life, the radio emits a continuous warning tone and

stops transmitting if you press PTT for 180 continuous 

seconds.

Locking the Keypad

To avoid accidentally changing your radio settings, 

press and hold         for 3 seconds or until       displays. 

You can turn the radio on and off, adjust the volume, 

receive, transmit, send a call tone, and monitor 

channels. All other functions are locked.

To unlock the radio, press and hold        for 3 seconds 

or until       is no longer displayed.

Scanning Channels

Use scanning to monitor channels for transmissions or 

to find someone in your group who has accidentally 

changed channels. To start scanning, briefly press and 

release       . The scan indicator        displays. When 

the radio detects channel activity, it stops scanning  

Special Features

MENU

Use ♪/MON to:

• Transmit call tone

Use        to:

• Select menu options

• Exit the menu (when pressed while in a menu)

• Lock and unlock the keypad (when held down and  

  not in a menu)

Use        to:

• Talk

• Save a setting

Talking and Listening

To communicate, all radios in your group must be set

to the same channel and Interference Eliminator Code. 

To talk, press and hold PTT. Hold the radio 2 to 3 

inches away from your mouth when speaking.

When you finished speaking, release PTT (press to 

talk, release to listen)

Checking the Channel Before Transmitting

Your radio has 22 channels shared on a “take turn” 

basis. For uninterrupted communication, do not talk on 

a channel if someone else is currently talking on it.

To check for activity on a channel before you talk, 

press and hold ♪/MON. If you hear static, the channel 

is clear to use.

Interference Eliminator Code

Interference Eliminator Codes help minimize interference 

MENU

MENU

MENU