Language & Brightness

Change the display language

The NanoVNA-F V3 supports English and Chinese interface languages.

1. Tap CONFIG → LANGSET.
2. Select English or Chinese.
3. The interface updates immediately.

Note

The language setting is preserved across power cycles. You only need to set it once.

Adjust backlight brightness

Reducing brightness extends battery life when operating in the field.

1. Tap CONFIG → BRIGHTNESS.
2. Select one of five levels:
   • 100% — full brightness (default)
   • 80%
   • 60%
   • 40%
   • 20% — dimmest setting
3. The display adjusts immediately.

Tip

In bright outdoor conditions, keep brightness at 100% for readability. In dark lab environments, 40% or 60% is comfortable and saves battery.

Note

The brightness setting persists after reboot. If the screen appears unusually dim after powering on, navigate to the brightness menu and increase the level.