Where the software shines is in the depth of control it offers over the hardware.

You will see a tabbed interface. Focus on the "Channel Information" or "Conventional Channel" table.

| Column | What to enter | | :--- | :--- | | Channel No. | 1 to 16 (PT8100 supports 16 channels maximum) | | RX Frequency | e.g., 462.562500 (for GMRS/FRS) or your repeater output | | TX Frequency | Usually same as RX for simplex; different for repeater (repeater input) | | QT/DQT Dec | CTCSS tone (e.g., 67.0 Hz) or DCS code (e.g., D023N) | | QT/DQT Enc | Usually same as Dec | | Power | High (H) or Low (L) | | Bandwidth | 12.5K (narrow) or 25K (wide) | | Scan | Add to scan list (Yes/No) |

Pro Tip: For a repeater channel, set RX to the repeater’s output frequency (what you listen on) and TX to the repeater’s input frequency (what you transmit on). The PT8100 does not have automatic offset calculation like a ham radio—enter both manually.

Since the PT8100 is discontinued, you might not find official support from Kirisun.com. If the original software is impossible to locate, consider these alternatives:

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Now the hardware and software are ready. You will either read the current configuration from the radio or write a new one to it.