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Re: [Discuss-gnuradio] USRP2 missing Quadrature samples

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] USRP2 missing Quadrature samples
Date: Wed, 04 Feb 2009 18:00:09 -0800

On Wed, 2009-02-04 at 17:24 -0800, Leslie Choong wrote:

> I'm baffled. I formatted the SD card and made sure the USRP2 didn't
> boot up (No LEDs lit). Then reflashed it with the latest firmware and
> FPGA image (2 LEDs lit). I still see 0.0 Q samples at 2.4G, 2.45G etc.
> I've tried swapping the RFX 2400 daughterboard with a spare AND two
> with different USRP2's and still see the same behaviour. I've done
> this with the latest trunk of GNURadio (revision 10392).

Can you run:

usrp2_rx_cfile.py -f 2.45G -d 16 -g 30 -N 1M -v rx.dat

...and email me directly the rx.dat file?

Also, try the same at 2.4G and 2.5G, and email me those.

Finally, please capture the output of the scripts, that is, something
that looks like:

$ usrp2_rx_cfile.py -f 2.45G -d 16 -g 30 -N 1M rx.dat -v
Network interface: eth0
USRP2 address: 00:50:c2:85:30:40
Using RX d'board id 0x0027
Rx gain: 30.0
Rx baseband frequency: 2.45G
Rx DDC frequency: 0
Rx residual frequency: 0
Rx decimation rate: 16
Rx sample rate: 6.25M
Receving 1M samples
Writing 32-bit complex floats
Output filename: rx.dat



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