User`s guide

FFT
5-181
Dialog Box
Twiddle factor computation
Computation method of the term in Equation 5-2. In
Table lookup mode, the block computes and stores the sine and cosine
values before the simulation starts. In
Trigonometric fcn mode, the block
computes the sine and cosine values during the simulation. See “Selecting
the Twiddle Factor Computation Method” on page 5-177.
Optimize table for
Optimization of the table of sine and cosine values for
Speed or Memory.
Active only when
Twiddle factor computation is set to Table lookup. See
“Selecting the Twiddle Factor Computation Method” on page 5-177.
Output in bit-reverse order
Order of the output channel elements relative to the ordering of the input
elements. When checked, the output channel elements are in bit-reversed
order relative to the input ordering. Otherwise, the output column
elements are linearly ordered relative to the input ordering. See “Ordering
Output Column Entries (Output in bit-reversed order Parameter)” on
page 5-176.
Supported
Data Types
e
j– 2π m 1–()k 1–()M⁄
Single-precision floating point Table lookup mode only
Double-precision floating point All modes