Please follow the steps below to calibrate the TBS Tango 2 Gimbals.
- Power up the unit.
 - Long Press the <MENU> button to enter the Radio Setup Page.
 - Press the <PAGE> button 3 times to navigate to page 4, Hardware.
 - Click the scrolling wheel to enter calibration.
 - You may choose to calibrate both gimbals at the same time (Both) or Separately (Left / Right).
 - Follow the graph and put the sticks to where it indicates.
 - MOVE IN "+" PATTERN,  
Move the sticks along the middle of X and Y axis. (*Ignore the graph.)
Avoid diagonal movements. Go from the middle to the edge. - Click the scrolling wheel when done.
 - Move the sticks around to confirm the results. 
Make sure the dots are touching all 4 sides and there should be no twitching.
 That's it! Your gimbals are now calibrated!
Video guide: