[USRP-users] Creat a sinwave signal by usrp-b200

Ron Economos w6rz at comcast.net
Fri Nov 15 15:46:07 EST 2019


Try reducing the gain in the UHD Sink block. At full output, the 
waveform will be compressed.

You can also set your Signal Source frequency to zero.

Ron

On 11/15/19 07:05, Van-Dung PHAM wrote:
> Dear @Ron,
>
> Thank you for your kindly reply
>
> As you said, I change the frequency to 50MHz-6GHz, and I the 
> Oscilloscope I got the correct frequency as I want
>
> However, the shape of the signal isn't really sinus. The maximum 
> sampling rate of my oscilloscope is 5 GSa/s
>
> Do you think the sample rate could change the shape of the sine 
> waveform? (I set the samp_rate=50MHz)
>
> Best,
>
> Van-Dung
>
> Vào Th 6, 15 thg 11, 2019 vào lúc 13:30 Malik Saad via USRP-users 
> <usrp-users at lists.ettus.com <mailto:usrp-users at lists.ettus.com>> đã viết:
>
>     Dear,
>
>     You can change the signal waveform (fro signal source) from sine
>     to cosine.
>
>     On Fri, Nov 15, 2019 at 9:25 PM Ron Economos via USRP-users
>     <usrp-users at lists.ettus.com <mailto:usrp-users at lists.ettus.com>>
>     wrote:
>
>         You can't have a center frequency of 1 kHz in your UHD Sink
>         block. The frequency range of the B200 is 50 MHz to 6 GHz.
>
>         If you change the center frequency to 50 MHz, you should see a
>         50.001 MHz signal.
>
>         Be sure to terminate the output of the B200 with 50 ohms. With
>         Gain Type = Normalized, Gain Value = 1 and Amplitude = 1 in
>         the Signal Source, you'll be transmitting at maximum power.
>
>         Ron
>
>         On 11/15/19 00:44, Van-Dung PHAM via USRP-users wrote:
>>         Dear all,
>>
>>         I am a newbie in this domain. I want to generate a cosine
>>         waveform in the output of usrp-B200 (TX/RX). So I make it as
>>         the following picture
>>         image.png
>>         But what I got in the oscilloscope is not a cosine/sine
>>         waveform. I don't know where I have a mistake.
>>
>>         Thank you very much for your answers
>>
>>
>>
>>
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