User`s guide

Random Source

5-360

The specified variance is equally divided between the real and imaginary

components, so that

Output Repeatability

The Repeatability parameter determines whether or not the block outputs the

same signal each time you run the simulation. You can set the parameter to one

of the following options:

•

Repeatable — The block outputs the same signal each time you run the

simulation. The first time you run the simulation, the block randomly selects

an initial seed. The block reuses these same initial seeds every time you

rerun the simulation.

•

Specify seed — The block outputs the same signal each time you run the

simulation. Every time you run the simulation, the block uses the initial

seed(s) specified by the

Initial seed parameter. Also see the next section,

“Specifying the Initial Seed”.

•

Not repeatable — The block does not output the same signal each time you

run the simulation. Every time you run the simulation, the block randomly

selects an initial seed.

Specifying the Initial Seed

When you set the Repeatability parameter to Specify seed, you must set the

Initial seed parameter. The Initial seed parameter specifies the initial seed

for the pseudorandom number generator. The generator produces an identical

sequence of pseudorandom numbers each time it is executed with a particular

initial seed.

For real outputs (

Output complexity parameter set to Real), a length-N seed

vector can be specified to set a distinct initial generator seed for each individual

channel. When a scalar seed is specified for a multichannel output, the block

uses the specified seed for the first channel, and increments the seed by 2 for

each additional channel. For example, specifying an

Initial seed value of 10 for

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