In the frequency sweep mode, the instrument “steps” from the start
frequency to the stop frequency at a sweep rate which you specify. You can
sweep up or down in frequency, and with either linear or logarithmic
spacing. You can also configure the instrument to output a single sweep
(one pass from start frequency to stop frequency) by applying an external or
manual trigger. The instrument can produce a frequency sweep for sine,
square, ramp, or arbitrary waveforms (pulse, noise, and dc are not allowed).