Audio Waveform PM Menu Key Sequence: Measure or (Shift + 4) > Audio Waveform > Audio Waveform Audio Waveform PM Menu Sweep Time Press to set the sweep time. If you use the numeric keypad to enter a value, then the submenu keys change to Time in units of s, ms, µs, ns, or ps. Scale milli‑Rad Press to set the sweep scale in milliradians. Use the numeric keypad, the rotary knob, or the arrow keys to enter a value. Squelch Power Press to set the squelch power level. Back Press to return to the Measurements menu.