Note : Many cables use Prolific chips; if the computer fails to recognize the cable, you may need to "roll back" to an older, compatible driver (e.g., version 3.2.0.0).

feature, which routes microphone audio through an external horn for out-of-vehicle clarity. from your PT8100 using this software? Kirisun Programming Software Pt8100 12 1 - Facebook

| Error Code | Meaning | Solution | | :--- | :--- | :--- | | | The software expects a PT8100, but the radio connected is different. | Download the correct CPS version. Do not force the write. | | Error 3: Communication Fail | PC cannot talk to the radio. | Check COM port settings, cable driver, and that the radio is turned ON during the read/write process. | | "Invalid Frequency" | You entered a frequency outside the radio’s band split. | Check your radio’s label (PT8100 is available in VHF 136-174MHz or UHF 400-470MHz). | | CPS Won’t Open on Windows 10 | Legacy software requires older .NET Framework. | Install .NET Framework 3.5 via Windows Features. Run in Windows 7 Compatibility Mode . |

If you cannot find the official CPS, consider these options, though they are not recommended for beginners: