Valid function

Interest

The Valid function allows creating square wave signals.

Definition

The Valid(X,X1,X2) function returns:

• 1, if X is in [X1 , X2[
• 0, otherwise

Notes:

• The arguments X1 or X2 can be omitted.

  In this case, X1 is replaced by -∞ and X2 by +∞.

• The arguments X and X1 and X2 can be formulas.

Operation mode

In case of transient application it is also possible to define a rectangular pulse function described in the figure below.

Create an I/O parameter: PE = Valid(TIME, T1 , T2 )

where:

• TIME is the parameter time
• T1 is the instant of the pulse start
• T2 is the instant of the pulse end

Example

An example of the Valid function is presented below.

A Rump function truncated by a gate function: RP(t) = t*Valid(t,10,20)