[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss-gnuradio] Differences in Signal Spectra between Daughtercards

From: Thomas
Subject: [Discuss-gnuradio] Differences in Signal Spectra between Daughtercards
Date: Mon, 11 Jan 2010 08:58:16 -0800 (PST)


I'm working on a project that requires using two receivers tuned the same frequency simultaneously. Ideally, I would use identical receivers, but I am using a TVRX card and a DBSRX card becuase those are what I have available.

I'm curious why the spectra of signals received with the TVRX seem to be more spread out than with the DBSRX. An example is shown in the link below. The upper plot is from the TVRX, and the lower plot is from the DBSRX. This signal happens to be an ATSC carrier. Both daughtercards are tuned the same frequency, and the FFT parameters and so forth are identical.


Does anyone know what causes this apparent spreading and if there is anything I can do about it?

I purposely left out details of my configuration to keep this message short, but feel free to ask for more information if this isn't enough to answer my question.

Thank you,


reply via email to

[Prev in Thread] Current Thread [Next in Thread]