RESPITE: The CASA Toolkit Page: Documentation: Block Library Index:SquareWave

SquareWave

SquareWave is a signal generator block that generates a regular square wave function. There are 5 controlling parameters: SAMPLE_RATE, DURATION, FREQ, AMP, and initial PHASE.

SAMPLE_RATE is in units of samples per second, DURATION is measured in seconds, and FREQ in cycles per second. The square wave has maximum and minimum values of +AMP and -AMP. The initial PHASE is specified in radians where the one complete cycle of the wave has 2 Pi radians (see diagram below).

Inputs Meaning Sample 1-D frame $\ge$ 2-D frame

No inputs

Inputs	Meaning	Sample	1-D frame	$\ge$ 2-D frame
No inputs

Outputs Meaning

out1 generated signal

Outputs	Meaning
`out1`	generated signal

Parameters Type Default Meaning

SAMPLE_RATE Float - Number of samples per second

DURATION Float - Duration in seconds of signal to generate

FREQ Float - The square wave frequency

AMP Float 1.0 The square wave amplitude

PHASE Float 0.0 The initial phase in radians

Parameters	Type	Default	Meaning
`SAMPLE_RATE`	Float	-	Number of samples per second
`DURATION`	Float	-	Duration in seconds of signal to generate
`FREQ`	Float	-	The square wave frequency
`AMP`	Float	1.0	The square wave amplitude
`PHASE`	Float	0.0	The initial phase in radians

**Figure:**
$\begin{figure} \begin{center} \psfig {figure=graphics/squarewave.eps,width=0.9\columnwidth}\end{center}\vspace{-4mm} \end{figure}$

Documentation for CTKv1.1.4 - Last modified: Thu Jun 28 14:53:52 BST 2001