On Wed, Sep 26, 2012 at 11:55 AM, Josh Blum
<address@hidden> wrote:
On 09/26/2012 01:36 AM, LD Zhang wrote:
> Hi,
>
> I did try and made a GRC example of using a USRP Source and a fft sink,
> scope sink, and a file sink to test out the idea.
>
> When looking at the scope sink, the data is about +/- 2x10^-4. I changed
> the gain of the USRP source block to 20 dB. But nothing happened to the
> signal amplitude. How is this possible?
>
You mentioned LFRX? There are no configurable gain elements for the LFRX
daughterboard.
If this helps, the various gain ranges are listed for various
daughterboard frontends here:
http://files.ettus.com/uhd_docs/manual/html/dboards.html#basic-rx-and-lfrx
-josh