[Discuss-gnuradio] Error in testing benchmark_tx/rx.py

[Songsong Gee]

I'm currently testing UHD.
I use two USRPs with one SBX on each.
and I got GNU Radio 3.5.0rc0 on Ubuntu 10.10 and benchmark programs
supporting UHD.

When I run benchmark_tx/rx.py, however,

address@hidden $ ./benchmark_tx.py -f 410M
address@hidden $ ./benchmark_rx.py -f 410M

I can see 'dots' representing a signal is transmitted on a transmitter side.
but a receiver does give nothing on a screen.

and the screens on the both side, I got this message.
====================================================
No gain specified.
Setting gain to 5.750000 (from [-20.000000, 31.500000])

UHD Warning:
    The hardware does not support the requested TX/RX sample rate:
    Target sample rate: 0.050000 MSps
    Actual sample rate: 0.250000 MSps

Symbol Rate:         25000.000000
Requested sps:       2.000000
Given sample rate:   250000.000000
Actual sps for rate: 10.000000

Requested sample rate: 50000.000000
Actual sample rate: 250000.000000
====================================================

What did I do wrong?

1. Wrong frequency option (either tx or rx)
2. Wrong/Unspecified sample rate option (either tx or rx)
3. Too weak signal strength to catch
4. Or...?

-- 
Seokseong Jeon, PhD Candidate
Communication & Networks Lab
IT Convergence Engineering (ITCE), POSTECH, Korea
+82 10 8338 1229, gee.songsong at gmail . com