To configure a single band in AirCheck G2.  

• From the Home page, Tap the Settings/Gear icon in the lower right.
• Tap 802.11 Settings.
• Tap Channels and Bands.
  
   
• Select/enable individual bands and/or channels, press Apply in the lower right corner.

The next time you perform a Wi-Fi connection by Network/SSID, you will only use the pre-configured band which may be useful for Active Surveys.