Why do i receive Incorrect result in Filter Design and Analysis Methods?

Hello,

I'm taking a self-paced course in Filter Design and Analysis Methods. When I reach the module "Filter Analysis" --> "Impulse Response" I come across an error that I don't know why it's happening. Can someone help?

The task i have to do is to create a bandpass FIR filter (which I do) but when I try to Submit it the message I receive is always the same "Incorrect

Is the plot correct?"

And the plot is correct, I have compared side-by-side the plot with the one in "See solution".

What can I do?

[Leepakshi]

Hi Evangelia,

Please share both the graphs, obtained and the expected one.

Answer 1

[Renee Coetsee]

We are working on releasing a fix for this issue.

In the meantime, you can use code instead of live tasks for this activity.

For task 1, enter this code:

designedFIR = designfilt('bandpassfir', ...
    'StopbandFrequency1',2100,'PassbandFrequency1',2200, ...
    'PassbandFrequency2',2500,'StopbandFrequency2',2600, ...
    'StopbandAttenuation1',80,'PassbandRipple',1, ...
    'StopbandAttenuation2',60,'SampleRate',fs);

impz(designedFIR,[],fs)

For task 2, enter this code:

designedIIR = designfilt('bandpassiir', ...
    'StopbandFrequency1',2100,'PassbandFrequency1',2200, ...
    'PassbandFrequency2',2500,'StopbandFrequency2',2600, ...
    'StopbandAttenuation1',60,'PassbandRipple',1, ...
    'StopbandAttenuation2',60,'SampleRate',fs);

impz(designedIIR,[],fs)