Re: Vector Block Sample Rate

[Cinaed Simson]

First, for the active part of the flow graph - which doesn't have any 
hardware , will run as fast as your computer will allow it, i.e. it may 
cause your computer to slow down. To prevent this add a throttle.

Send, your noise source is an unknown source with 0 amplitude. If the 
noise source is unknown and 0 amplitude, why do you need a low pass filter?

Also, what version of gnuradio are you using?

-- Cinaed

On 6/4/22 14:09, DİREN ERDEM AYDIN via GNU Radio, the Free & Open-Source 
Toolkit for Software Radio wrote:
> Hello All,
>
> I'm working with Adalm Pluto SDR, trying to transmit and receive a 
> custom burst signal given in the figure. To create the signal I'm 
> using a vector block that creates a pulse and then due to a low pass 
> filter I can extract the desired waveform. Flowgraph is also added.
>
> As far as I know, input/output sample rates of connected blocks should 
> be matched. However, I'm providing 10k fewer samples to LPF because of 
> the high sample rate of pluto, 61.44 M. When I tried to increase the 
> samples in the vector source to Mega ranges frequency response of the 
> signal drops drastically. I have also tried to use interpolation in 
> between vector block and LPF, but it doesn't work either.
>
> My question is the LPF block normalizes the input sample rate to 61.44 
> M? The whole system works OK but this thing stays unclear for me. 
> Thank you.
>
> Regards,
> Diren