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[Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2
From: |
Marcus D. Leech |
Subject: |
[Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2 |
Date: |
Sun, 14 Nov 2010 14:28:23 -0500 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10 |
I did a "git pull" for both UHD GnuRadio yesterday. I'm on the "next"
branch for gnuradio, and on
"master" for UHD.
Since doing a rebuild yesterday, bandwidths below 400KHz no longer work
on the USRP2.
I did a test with a dead-simple flowgraph:
UHD single source-->multi-const x 32767-->FFT
For bandwidths >= 400KHz, the resulting FFT, with my existing RF
front-end with 40dB gain feeding
the BASIC_RX on my USRP2, the FFT looks just fine (showing a level
around -40dB).
But anything below 400KHz bandwidth (I tried various bandwidths between
200KHz and 400KHz),
produces an FFT with nothing useful in it, and a "level" around -400dB.
This used to work just fine below 400KHz. What happened?
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
- [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2,
Marcus D. Leech <=
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/16
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Tom Rondeau, 2010/11/16
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/16
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Tom Rondeau, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Matt Ettus, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Marcus D. Leech, 2010/11/17
- Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2, Steven Clark, 2010/11/17