Step. 1. Uninstall the previously installed USB driver software,

don’t connect USB Cable first.

Step. 2. Unzip USB driver

Step. 3. Install USB Driver software

Step. 4. Open Device manager , Check comm port

Step 5. Install Chierda CD-A8 Radio Programming Software

Step 6. Connect USB cable to your PC.

Step 7. Connect USB cable to radio.

Step 8. Turn on Radio.

Step 9. Running CD-A8 software

Step 10. Read date from radio, Enter the password, click “Read”

Step 11. Choose Comm port

Read radio frequency and program the radio as you wish.

Then click write frequency.

Thank you for reading.

                                                                                                          Quanzhou Chierda Electronice Telecom Co.,Lted.