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Re: [Discuss-gnuradio] How to generate a FM signal?

From: nansai hu
Subject: Re: [Discuss-gnuradio] How to generate a FM signal?
Date: Mon, 26 Oct 2009 17:35:08 -0400

I appracite you could tell me what is the meaning of following paramaters:
        @param audio_rate: sample rate of audio stream, >= 16k
        @type audio_rate: integer
        @param quad_rate: sample rate of output stream
        @type quad_rate: integer
        @param tau: preemphasis time constant (default 75e-6)
        @type tau: float
        @param max_dev: maximum deviation in Hz (default 75e3)
        @type max_dev: float

I try to change the max_dev from 10 to 1000,and give it to a usrp source as baseband signal,
but, the bandwith on spectrum analyize don not change.How to change deviation of a fm signal?
2009/10/26 nansai hu <address@hidden>
I tried to run your code wfm, but there is nothing happened in my spectrum analyzer.
I am just wondering that your code is in baseband or how to add a carrier freq by usrp source.

2009/10/24 Josh Blum <address@hidden>

nansai hu wrote:
Is anybody had a experiment about How to generate a FM signal?

Use the wideband and/or narrowband fm blocks; just specify your data rates.


or tell me how to use FM MOD or VCO module in GRC, what is the paramater
sensitive means?

check the source :-)


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