User`s guide

Discrete Impulse
5-139
Run the model and look at the output, yout. The first few samples of each
channel are shown below.
yout(1:10,:)
ans =
1 0 0
0 0 0
0 0 0
0 1 0
0 0 0
0 0 1
0 0 0
0 0 0
0 0 0
0 0 0
The block generates an impulse at sample 1 of channel 1 (first column), at
sample 4 of channel 2 (second column), and at sample 6 of channel 3 (third
column).
Dialog Box
Delay
The number of zero-valued output samples,
D, preceding the impulse. A
length-N vector specifies an N-channel output. Tunable.