Changes are sent to the XG3 when you click "Apply" or "OK". OK closes the dialog, Apply does not.
After the indicated number of minutes of inactivity, the XG3 can turn itself off to extend battery life. Enter 0 if you don't want the device to power itself off.
The XG3 is supplied factory calibrated. If you wish, you can adjust the XG3 to match your frequency standard. Enter a new value between -32768 and 32767, and click Apply to send the new calibration factor to the XG3. Observe the effect of the changed value, and repeat this as necessary to bring the XG3 output to the correct frequency.
Choose one of the four buttons to adjust the brightness of the Light Emitting Diodes (LEDs).