OCC BW Menu Key Sequence: Measurements > Spectrum > OCC BW IA OCC BW Menu On/Off This submenu key turns the Occupied Bandwidth on or off. Method Select either the % of Power (default) or dB Down measurement method as displayed in the message area. % Int Pwr: Use the keypad, the directional arrow keys, or the rotary knob to enter the percent of power, from 0% to 99%. > dBc: Use the keypad, the directional arrow keys, or the rotary knob to enter the dBc value (0 dBc to 100 dBc). Back Returns to the “Measure Menu”.