Hi Isaac,
I am not sure what you are trying to achive. However, your low pass
filter seems to be set up incorrectly. You have a signal with 1MHz and
10MHz samplerate. Your low-pass filter has a cutoff at 5MHz and then
down-samples by 100. If you want to make sure that there are no
frequency components aliased during the downsampling step, you should
have a cutoff of 100kHz or below. When you set the cutoff to 100k and
the transition width to 50k, you get a nice constant rect at the output.
Hope that helps.
Best,
Fabian
Am 20.07.22 um 19:03 schrieb isaac mario tupac davila:
Hello everyone
My name is Isaac. I'm dealing with a curious behaviour that I can't
understand...
I'm generating my pulsed signal by multiplying a vector source and a
signal source. Then I'm multiplying this pulsed signal with a continuous
signal source at the same frequency, passing then for a low pass filter
and seeing it in a time sink block.
The result should be a set of rectangles with the same amplitude and
period. The curious thing here is that the amplitude varies in time
(from 0 to max amplitude and vice versa). Any idea why the amplitude
varies in time?
I attach the flowgraph just in case.
Any idea or help will be appreciated.
Thanks
Isaac t.
