Set side buttons (SK1, SK2) to functions like Monitor, Scan, or Emergency.
Throughout 2021 and into 2023, several distinct software versions were commonly used:
Even though the TC700 was released years ago, software revisions between 2018 and 2021 addressed: hyt tc700 programming software 2021
Navigate to or Button Settings . The TC-700 has customizable side keys. You can assign functions like: Squelch Off / Monitor (to check channel activity) High/Low Power toggle Scrambler (built-in voice inversion for basic privacy) Emergency Mode activation 5. Writing the New Codeplug to the Radio
FTDI or Prolific USB-to-Serial driver (Ensure you install legacy drivers if using older Prolific cables on Windows 10/11). Set side buttons (SK1, SK2) to functions like
This is the most common issue. First, check that the radio is turned on and the battery has adequate charge. Next, verify that the programming cable is firmly seated into the accessory port. Finally, double-check that you have selected the correct COM Port in the software.
Roll back Prolific drivers to version 3.2.0.0 or use an FTDI chip cable. Software version doesn't match radio band. You can assign functions like: Squelch Off /
| Error Message | Cause | 2021 Solution | |----------------|-------|----------------| | | Wrong COM port or radio off | Verify COM port in Device Manager; turn radio on after clicking Read. | | “Unsupported model” | Wrong software version | Your TC700 may be a TC700U (UHF) or TC700M (Marine). Seek specific variant software. | | “Invalid frequency” | Frequency out of band | TC700 UHF model covers 400-470 MHz. You cannot program VHF or 350 MHz public safety freqs. | | “Codeplug too new” | Radio programmed with newer software | Use the newer version that wrote the codeplug. Downgrading is risky. | | USB device not recognized | Counterfeit cable chipset | Replace with FTDI-based cable. Windows 10 killed fake Prolific chips in 2020/2021. |
Program side buttons, voice compander, VOX, and scrambling.
Most modern cables use the Prolific or FTDI chipsets. Ensure your Windows Device Manager recognizes the cable under "Ports (COM & LPT)." If you see a yellow exclamation mark, you likely need to roll back your Prolific driver to an older version (3.2.0.0 is a common stable choice for 2021 setups). 3. Key Features You Can Configure
Always click "Read from Radio" first. This saves a backup of your current settings. Edit: Change your frequencies or settings as needed.