Press to set the PM audio spectrum span. Use the numeric keypad, the rotary knob, or the arrow keys to set the value. Valid values are 2 kHz, 5 kHz, 10 kHz, 20 kHz, 70 kHz, and 140 kHz.
Press to set the scale in milliradians. Use the numeric keypad, the rotary knob, or the arrow keys to enter a value.