BasebandStep

BasebandStep defines a smooth baseband step function with no carrier modulation.

Formula

Let $\sigma = \mathrm{rise\_time} / 2.563$ and $t_c = \mathrm{offset}\,\mathrm{rise\_time}$. The source is:

$s(t) = \frac{A}{2}\left[ 1 + \mathrm{erf}\left(\frac{t - t_c}{\sqrt{2}\sigma}\right) \right]$

The signal ramps from zero to amplitude and contains strong low-frequency content.

Parameters

rise_time: 10%-to-90% rise time.

• Unit: s
• Constraint: greater than 0
• Required field

offset: Delay of the step center in units of rise_time.

• Constraint: greater than or equal to 2.5
• Default: 5

amplitude: Final step amplitude.

• Default: 1

phase: Locked to 0 for baseband source times.