Spectrum analyzer block in Simulink - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the Spectrum Analyzer block's sample rate.

Simulink

spectrumAnalyzer.SampleRate = [1];

Drag options to blanks, or click blank then click option'

A1000

B0

C44100

D-1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting sample rate to zero or negative values causes errors.

The sample rate must be set to the signal's sampling frequency, commonly 44100 Hz for audio signals.

2fill in blank

medium

Complete the code to set the Spectrum Analyzer block's FFT length.

Simulink

spectrumAnalyzer.FFTLength = [1];

Drag options to blanks, or click blank then click option'

A-256

B512

C0

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-power-of-two or negative FFT lengths causes errors.

FFT length must be a positive power of two, such as 512, for efficient computation.

3fill in blank

hard

Fix the error in setting the Spectrum Analyzer block's window type.

Simulink

spectrumAnalyzer.Window = '[1]';

Drag options to blanks, or click blank then click option'

AHanning

BRectangular

CBlackman

DHamming

Attempts:

3 left

💡 Hint

Common Mistakes

Misspelling window names or using incorrect casing.

The correct window type string is 'Hamming' with double quotes or single quotes.

4fill in blank

hard

Fill both blanks to create a spectrum analyzer object and set its sample rate.

Simulink

spectrumAnalyzer = dsp.SpectrumAnalyzer();
spectrumAnalyzer.[1] = [2];

Drag options to blanks, or click blank then click option'

ASampleRate

BFFTLength

C44100

D512

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing FFTLength with SampleRate or using wrong values.

First, set the SampleRate property to 44100 Hz after creating the Spectrum Analyzer object.

5fill in blank

hard

Fill all three blanks to configure the spectrum analyzer's FFT length, window, and sample rate.

Simulink

spectrumAnalyzer.[1] = [2];
spectrumAnalyzer.Window = '[3]';

Drag options to blanks, or click blank then click option'

AFFTLength

B512

CHamming

DSampleRate

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing property names or using incorrect window strings.

Set FFTLength to 512 and Window to 'Hamming' to configure the spectrum analyzer properly.