E100 problem

GNU Radio
1

Hi all,

I’m trying to run benchmark_tx.py on an E100 (rev.3). When I do, I get a
bunch of “S” symbols printed to the screen and nothing shows up on the
Spec Analyzer except a CW that appears for an instant and then dies. The
reported sample rate is 800ksps. I’m not sure what’s going on. Here’s
the command I used:

./benchmark_tx.py -f 910000000 --tx-amplitude=0.3 --non-differential -v
–tx-gain=0.0 --args=“type=E100” -m bpsk -r 400000

The output of uhd_usrp_probe is attached. This is the e1xx-003 release.
uname -a gives:

Linux usrp-e1xx 3.0.0 #1 Mon Mar 26 04:45:32 PDT 2012 armv7l GNU/Linux

Thanks for your help!

Respectfully,
Sean Nowlan

2

I downloaded a fresh e1xx-003 image today and flashed it to the microSD
card. I’m still not having any luck running benchmark_tx on the e100. I
tried:

./benchmark_tx.py -a “type=e100” -m bpsk -p 2 -r 100000 --tx-gain=0
–non-differential --tx-freq=925000000 --tx-amplitude=0.5

I see a small CW at 924 MHz, which I suppose is the LO, but no waveform
appears at all. Has anybody else seen this behavior? There is no
feedback from the system about overruns, underruns, etc., just dead
silence on the spec analyzer.

Sean

From: discuss-gnuradio-bounces+sean.nowlan=removed_email_address@domain.invalid
[mailto:discuss-gnuradio-bounces+sean.nowlan=removed_email_address@domain.invalid] On
Behalf Of Nowlan, Sean
Sent: Thursday, May 17, 2012 12:47 PM
To: [email protected]
Subject: [Discuss-gnuradio] E100 problem

Hi all,

I’m trying to run benchmark_tx.py on an E100 (rev.3). When I do, I get a
bunch of “S” symbols printed to the screen and nothing shows up on the
Spec Analyzer except a CW that appears for an instant and then dies. The
reported sample rate is 800ksps. I’m not sure what’s going on. Here’s
the command I used:

./benchmark_tx.py -f 910000000 --tx-amplitude=0.3 --non-differential -v
–tx-gain=0.0 --args=“type=E100” -m bpsk -r 400000

The output of uhd_usrp_probe is attached. This is the e1xx-003 release.
uname -a gives:

Linux usrp-e1xx 3.0.0 #1 Mon Mar 26 04:45:32 PDT 2012 armv7l GNU/Linux

Thanks for your help!

Respectfully,
Sean Nowlan