Re:VectorSourceBlock-GRC

[Cyrille Morin]

Hello Isaac, 

Adding a delay block set to at least 24 could indeed allow you to see your square signal.
But you can also solve the cause of the issue:
By default, the time sink I assume you are using, is set to display 1024 samples at a time. So it waits for that amount of samples before plotting anything. In your case, you are generating only 1000 samples, so the time sink is stuck waiting for the last 24.
The delay block, as part of its operation, starts by outputting samples with 0s  according to its delay setting, so you can create the 24 you are missing that way.
You can also set your time sink to display just 1000 samples, and you should see just what you generated.

Hope that was clear,
Cyrille

Le 30 septembre 2021 08:36:34 GMT+02:00, "dominik.walach" <dominik.walach@pekasat.com> a écrit :

Hello Isaac,

The solution is quite simple, just add a delay block to the flowgraph (see the attachment). Vector Source pushes all the samples at the beginning faster than Time Sink can even display it.

Best,

Dominik

Od "Discuss-gnuradio" discuss-gnuradio-bounces+dominik.walach=pekasat.com@gnu.org

Komu discuss-gnuradio@gnu.org

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Datum Wed, 29 Sep 2021 17:25:04 -0500

Předmět VectorSourceBlock-GRC

Hello

I'm Isaac. I'm trying to produce a 1KHz square signal for only one period. So I decided to do it with the vector source block (500 ones and 500 zeros). But when I run it with the option repeat = No, I only see zero. When I put repeat=yes, I see the square but continuous, not only one period.

¿What am I missing? Any help or advice is welcomed.

Regards

Isaac T.

Cyrille Morin