User`s guide

DSP Constant
5-148
5DSP Constant
Purpose Generate a discrete-time or continuous-time constant signal.
Library DSP Sources
Description The DSP Constant block generates a signal whose value remains constant
throughout the simulation. The
Constant value parameter specifies the
constant to output, and can be any valid MATLAB expression that evaluates to
a scalar, vector, or matrix.
When a row vector or column vector is specified for the
Constant value
parameter, and the
Interpret vector parameters as 1-D check box is selected,
the dimension of the
Constant value vector is disregarded, and the output is a
1-D vector. When the
Interpret vector parameters as 1-D check box is not
selected, the output dimension is constrained to match the
Constant value
dimension (row or column). When the Constant value is an M-by-N matrix
with M > 1 and N > 1, the output is always M-by-N.
When
Sample mode is set to Continuous, the output is a continuous-time
signal. When
Sample mode is set to Discrete, the Sample time and
Frame-based output parameters are enabled, and signal has the discrete
output period specified by the
Sample time parameter.
When the
Frame-based output check box is selected, the output is
frame-based; otherwise, the output is sample-based. Because a 1-D vector
signal cannot be frame-based, an active
Frame-based output setting overrides
an active
Interpret vector parameters as 1-D setting, and the output is a
frame-based column vector (regardless of the actual
Constant value vector
dimension).