USRP2 problem

Hello all,

I am facing an issue with an USRP2 with a RFX2400 daughterboard. I have
observed that when the USRP2 is used for transmission/reception, it
transmits/receives the first few packets successfully and then just
dies. When this happens, its transmitted packets are not received by
other USRP2’s
and it itself cannot receive packets anymore. The other USRP2s’ run my
program successfully. I have checked the flow control settings and they
are ok. If
the USRP2 is rebooted, the same cycle repeats. However, find_usrps and
usrp2_fft.py work fine. This problem is impeding progress in my work.

Any help in this regard will be appreciated.

Best regards,

Arvind P.
WNESL
University at Buffalo

On Mon, Mar 22, 2010 at 02:46:10PM -0400, Arvind P. wrote:

Hello all,

I am facing an issue with an USRP2 with a RFX2400 daughterboard. I
have observed that when the USRP2 is used for
transmission/reception, it transmits/receives the first few packets
successfully and then just dies. When this happens, its transmitted
packets are not received by other USRP2’s and it itself cannot
receive packets anymore. The other USRP2s’ run my program
successfully. I have checked the flow control settings and they are
ok.

Just to be certain, “OK” should look like this:

$ ethtool -a eth1
Pause parameters for eth1:
Autonegotiate: on
RX: on
TX: off

If the USRP2 is rebooted, the same cycle repeats. However,
find_usrps and usrp2_fft.py work fine. This problem is impeding
progress in my work.

Any help in this regard will be appreciated.

Is there a switch between the USRP2 and the host? If so, remove it.

From more clues, try connecting a TTL level serial interface to the
appropriate pins on the USRP2 motherboard, setting it to 230400 8N1
and looking at the output.

Sparkfun sells these. For a turnkey solution, order:

BOB-00198 “Breakout Board for CP2102 USB to Serial”
PRT-09140 “Jumper wires Premium 6” M/F Pack of 10"

Eric

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