Jump to content

GRC 1 sine wave at input, but 2 at scope?!


Recommended Posts


I am trying to rebuilt a sine wave in Matlab.

I am generating a sine wave with a frequency of 1.57542 GHz, and give it on the RF input at my USRP2.

As you can see on the attached image I am receiving the generated sine wave. But now I really do not understand, why they are 2 channels in the Scope? A green and a blue one.

And which one does the File Sink save?

The block UHD USRP Source samples the sine wave and sends the samples as I and Q to the File Sink? Does the File Sink save them as an array? for example array = [i1, Q1, I2, Q2, I3, Q3, ... ] or as array = [i1+iQ1, I2+iQ2, I3+iQ3, ... ]

The image shows the whole architecture, the Scope Sink and the FFT Sink. Please take a look.

My goal is to better understand the USRP2 and the GRC.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...