- 1). Press the Menu button. The label "Code' will appear on the read-out.
- 2). Press the plus, up or negative, down button to choose a interference eliminator code. It can be any code, but it needs to be the same on all the radios you want to talk to.
- 3). Press the Push-to-talk (PTT) button to enter the code.
- 4). Program a call tone. This shouldn't be the same on all the radios. The call tone broadcasts a unique sound which identifies you to other radio users on the same frequency. Press the Menu button three times and the label "CA" will flash on the read-out. Press the minus, down or plus, and up buttons to chose a tone.