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From: | Activecat |
Subject: | Re: [Discuss-gnuradio] Sine wave of only 3 cycles |
Date: | Thu, 30 Jan 2014 21:47:33 +0800 |
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Also,
to do basic mathematical tasks you don't have to rely on GNU Radio,
which is a fine signal processing framework but not so much a math
environment.
If you want to have a three period sine signal, the python is short
#import numpy as np
f_sin = 1.0
f_sample = 16.0
periods = 3.0
s_per_period = f_sample/f_sin
sinevalues = np.sin(np.linspace(0, periods*2*np.pi,
periods*s_per_period) )
sinevalues.astype(np.float32).tofile("filename")
this will be the same data format as written by the file sink.
Greetings
Marcus
-----BEGIN PGP SIGNATURE-----On 30.01.2014 13:02, Felix W. wrote:
> Hi,
>
> you can use a Head block to make the sample stream stop after a
> given number of samples. Just calculate how many samples there will
> be in three cycles and set the Head block's parameter accordingly.
>
> Greetings Felix
>
>
> 2014-01-30 Activecat <address@hidden>:
>
>> Dear Sir,
>>
>> A block of Signal Source (Sine) generates sine wave
>> continuously. How to make it just generates 3 wave-cycle and then
>> stop generating immediately. At the end of the flow-graph there
>> is a File Sink. This captures data for offline processing.
>>
>> Regards, address@hidden
>>
>>
>> _______________________________________________ Discuss-gnuradio
>> mailing list address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>>
>
>
>
> _______________________________________________ Discuss-gnuradio
> mailing list address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
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