Is it possible to read the ADC samples before the downconversion from the USRP?

GNU Radio
1

Hi,

I want to collect the samples of the USRP at the IF instead of the
baseband, so is there any way to read the ADC samples directly without
downconversion, at the PC?
I do not want to touch the FPGA.

–

Alex,
Dreams can come true just believe.

2

There is generally no IF on a USRP: it’s all baseband, even at the ADC.
That said, you need decimation in order to fit the full-speed baseband
data
over the 1Gbit (or USB) link. There is an existing user FPGA
modification
somewhere that buffers full-speed baseband data into the SRAM on an N210
for later retrieval. What exactly are you trying to do?

–n

3

In short, I want to get the samples right after the ADC, without any
down-conversion, decimation, and filter, etc.

On Wed, Aug 15, 2012 at 11:52 AM, Nick F. [email protected] wrote:

Hi,

USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

–

Alex,
Dreams can come true just believe.

4

Exactly what I want, thanks!

On Wed, Aug 15, 2012 at 2:48 PM, Josh B. [email protected] wrote:

That said, you need decimation in order to fit the full-speed baseband

Dreams can come true just believe.

[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

–

Alex,
Dreams can come true just believe.