Vtx-tables -

Download the VTX table from the manufacturer's website and use the "Load from file" button in the Video Transmitter tab.

Defines if you are using TBS SmartAudio or IRC Tramp. vtx-tables

Defines available power output, mapping mW (e.g., 25, 200, 800) to dB values. Why You Need Them Download the VTX table from the manufacturer's website

Many VTXs come "locked" to legal frequencies/power. You must apply an unlocked table or use the manufacturer’s instructions to unlock it, otherwise, you cannot use high-power modes. Reboot: Always save and reboot after applying a VTX table. To get you the exact answer, I need to know: What is the exact model of your VTX ? What protocol are you using (SmartAudio or IRC Tramp)? Why You Need Them Many VTXs come "locked"

Once I know this, I can help you find the right VTX table or tell you how to set it up. How to configure VTX tables for drone? - Facebook

Are you trying to configure this in ?

Without a correct VTX table, you cannot change your video channel or power output via your radio (OSD/stick commands). If the VTX table is wrong, it may revert to default settings (often 25mW) every time you plug in your battery. How to Configure VTX Tables (Betaflight)