You still seem to have no real grasp on what the frequency_modulator block does. Read my reply, and the documentation to that block again:
>> The frequency mod is but an input amplitude controlled complex sine. >> It outputs a signal, which has a momentary phase increase that is >> proportional to sensitivity and input amplitude; see the doxygen >> documentation for the frequency_modulator block. Greetings, Marcus On 25.05.2014 20:01, jason sam wrote: > But if it is doing FM then there should be some min and max > frequencies between which the signal will be switching? > > On 5/24/14, jason sam <[email protected]> wrote: >> thnx i will see that. >> >> On 5/24/14, Marcus Müller <[email protected]> wrote: >>> Ali, >>> >>> again: there is no center frequency in a baseband simulation. Your >>> sawtooth-repeat combination will give you a step signal, where the >>> amplitude is constant for 500 items. All frequencies that you set are >>> only used to calculate what will happen in one sample. >>> >>> The frequency mod is but an input amplitude controlled complex sine. >>> It outputs a signal, which has a momentary phase increase that is >>> proportional to sensitivity and input amplitude; see the doxygen >>> documentation for the frequency_modulator block. >>> >>> Greetings, >>> Marcus >>> >>> On 24.05.2014 09:47, jason sam wrote: >>>> Correction not 50 Hz but whatever the rate is after interpolation >>>> >>>> >>>> On Sat, May 24, 2014 at 12:23 PM, jason sam <[email protected]> wrote: >>>> >>>>> Another question related to my flowgraph that when i use the' >>>>> Frequency >>>>> Mod' block...then it will take the center frequency as 50Hz(the freq of >>>>> the >>>>> signal coming in)?? >>>>> >>>>> >>>>> On Fri, May 23, 2014 at 1:28 PM, Ron Economos <[email protected]> wrote: >>>>> >>>>>> I was experimenting with this the other day. I used >>>>>> the wide band FM modulator instead, since the >>>>>> deviation can be set. Here's the flow graph. >>>>>> >>>>>> http://www.w6rz.net/fmtest.grc >>>>>> >>>>>> The test audio files. sine01.wav is 0.1 Hz and >>>>>> sine15k.wav is 15000 Hz. >>>>>> >>>>>> http://www.w6rz.net/sine01.wav >>>>>> >>>>>> http://www.w6rz.net/sine15k.wav >>>>>> >>>>>> Some C code to generate audio files at other frequencies. >>>>>> >>>>>> http://www.w6rz.net/sine.c >>>>>> >>>>>> Ron >>>>>> >>>>>> >>>>>> >>>>>> On 5/22/2014 9:26 PM, jason sam wrote: >>>>>> >>>>>>> Hi, >>>>>>> I have made the flowgraph as attached..It is showing the modulation >>>>>>> in >>>>>>> scope but in fft block it's continuously changing so I am still >>>>>>> unable >>>>>>> to >>>>>>> find out that what are the max and min frequencies??I know how to >>>>>>> find >>>>>>> that >>>>>>> in theory but i want to prove it from my results.. >>>>>>> >>>>>>> >>>>>> _______________________________________________ >>>>>> Discuss-gnuradio mailing list >>>>>> [email protected] >>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> [email protected] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
