# BasebandStep
Source time dependence that describes a baseband step function. Unlike frequency-domain sources such as GaussianPulse, the baseband step produces a signal that ramps up from zero to a constant amplitude, which is useful for time-domain steady-state analysis.
# Rise Time
rise_time: The 10%-to-90% rise time in seconds. It is related to the Gaussian standard deviation by rise_time ≈ 2.563 × sigma.
Type: floating-point number
- Unit: s (default), ps, or fs
- Constraint: greater than 0
- Required field
# Amplitude
amplitude: Real-valued maximum amplitude of the time dependence.
Type: floating-point number
- Unit: unitless
- Constraint: greater than or equal to 0
- Default: 1
# Phase
phase: Phase of the baseband time dependence. It is fixed at 0.
- Default: 0
# Offset
offset: Delay of the step center in units of rise_time.
Type: floating-point number
- Unit: rise_time
- Constraint: greater than or equal to 2.5
- Default: 5