Hi,
We are currently experiencing Transmit and possibly Receive problems
with the USRP2-Flex2400 boards.
- The USRP2 is detected:
# find_usrps -e eth0
00:50:c2:85:32:73 hw_rev = 0x0400
- The latest firmware and Raw Ethernet FPGA images have been written
onto the SDRAM: u2_rev3-20100603.bin, u2_rev3-20100603.bin
- To test receive, we transmit a 2.4GHz, 10 dBm RF signal using the HP
8350B Sweep Oscillator/Signal Generator. This is detected by both the
USRP2-FLEX2400 (using usrp2_fft.py script) and Agilent Spectrum
Analyzer. However, the usrp2_fft.py shows some odd sidebands around the
the 2.4GHz central frequency when the signal generator is turned on.
Also, there's barely any difference in dB receive strength with the
signal generator turned on:
> usrp2_fft.py output when signal generator is off:
http://rrsg.ee.uct.ac.za/members/jwamicha/usrp2_fft-SignalGenerator-Off.png
> usrp2_fft.py output when signal generator is off:
http://rrsg.ee.uct.ac.za/members/jwamicha/usrp2_fft-SignalGenerator-On.png
- Both LEDs D and F are lit up.
- Gnuradio version 3.2.2 is being used on Ubuntu Lucid Lynx (10.04).
We then turn off the Signal Generator, and transmit a 2.4GHz signal
solely using the USRP2-FLEX2400 by running 'usrp2_siggen.py -f 2.4e9 -e
eth0'. Nothing gets picked up by the Agilent Spectrum Analyzer
USRP2-FLEX2400.
Is there a USRP2-FLEX2400 transmit/receive problem while using the
latest firmware and raw ethernet FPGA code? Could this be the symptoms
of an SDRAM problem even if both LEDs D and F are lit up?
Thanks,
Jaw.
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