Re: [Discuss-gnuradio] Change the frequency of signal periodical

[Marcus Müller]

Dear Atif,

I'm 100% certain you can generate a pure sinusoidal with the frequency modulator; I don't know the parameterization you used, or how you came to the conclusion that this is not the case, but I assure you that by reading the "Documentation" tab of the Frequency Mod block, and with a piece of paper and a little bit of math, you can achieve what you want.

Best regards,
Marcus

On 2017-10-23 14:06, Atif Javed wrote:

Dear Muller

i try your method but i doesn't be able to generate pure sinusoidal just like signal source can you please guide for the generation of pure sin or cosine wave 

Best,

ATIF JAVED

On Mon, Oct 23, 2017 at 3:19 AM, Marcus Müller <address@hidden> wrote:

Dear Atif,

please try to stay on-list (i.e. make sure address@hidden is in To: or CC:).

so, yeah, sounds like you want a source to generate these steps. In your case, what about using

vector source (vector being range(10,21,1) ) --> repeat (repeat factor = duration of each step / sampling rate) --> frequency mod (sensitivity accordingly)

I'd recommend you play around a bit!

Best regards,
Marcus

On 2017-10-23 12:11, Atif Javed wrote:

Dear muller i want to change the frequencies of signal source from defined values with a proper step size

like start 

frequency  starting value 10khz

step size                           1kHz 

frequency ending value  20khz 

This sequence automatically repeat itself

On Mon, Oct 23, 2017 at 12:51 AM, Marcus Müller <address@hidden> wrote:

Dear Atif,
what does "periodically" mean in this context?

Feels like you actually rather have something like a "Signal Source [Square wave + offset]" -> Frequency Modulator

Best regards,
Marcus

On 2017-10-23 05:22, Atif Javed wrote:

i want to change the frequency of signal source periodical using grc blocks can you please guide me regarding this problem 

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