[Discuss-gnuradio] N210: detectable with uhd_probe, unusable with gnuradio-companion

[Jeremy Cooper]

Hi everyone.

I'm continuing my quest to try out my new USRP N210 and WBX transceiver 
board.  I still haven't managed to make it do anything useful yet.

I have it attached directly to a Mac OS X 10.6 system, via the built-in 
gigabit ethernet interface.  I updated N210 to the latest firmware 
available on Thursday, 2011-2-10.  I also downloaded gnuradio-current on 
the same day and managed to get it compiled and installed.  (I have a 
couple of patches to submit in this regard, by the way).

So I am now finally at a point where I feel confident that I can make some 
signal graphs and actually listen to things on the air.  I started with 
the gnuradio-companion wide-band FM receiver example, but modified it so 
that it uses a UHD Single USRP source.  When I generate and execute this 
graph, I get the following error:

--- gnuradio-companion stdout/stderr ---
> > > gr_fir_fff: using SSE
mboard0 MIMO master

Warning:
    WBX: No tunable bandwidth, fixed filtered to 40MHz
UHD source block got error code 0x1
gr_block_executor: source <gr_block uhd single_usrp source (8)> produced no 
output.  We're marking it DONE.
-----------------------------------------

I configured that source as follows:

ID                   : uhd_single_usrp_source_0
Input type           : Complex
Num Channels         : Single Channel
Device Addr          : addr=192.168.10.2
Ref Clock            : Internal
Subdev Spec          :
Sample Rate (sps)    : 500000
Ch0: Center Freq (Hz): 100700000
Ch0: Gain (dB)       : 10
Ch0: Antenna         :
Ch0: Bandwidth (Hz)  : 250000


Here's some information that I've seen requested on the mailing list that 
might be helpful:

--- uhd_usrp_probe ---
Mac OS; GNU C++ version 4.2.1 (Apple Inc. build 5664); Boost_104500; 
UHD_002.20110204025144.dfb3ed0

mboard0 MIMO master
  _____________________________________________________
 /
|       Device: USRP2/N Series device
|     _____________________________________________________
|    /
|   |       Mboard: USRP-N210 mboard
|   |   rev: 2561
|   |   mac-addr: a0:36:fa:25:30:f4
|   |   ip-addr: 192.168.10.2
|   |   serial: EFR10Y4UP
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: USRP-N210 ddc0
|   |   |   Codec Rate: 100.000000 Msps
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: USRP-N210 duc0
|   |   |   Codec Rate: 100.000000 Msps
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: USRP-N210 dboard (rx unit)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Subdev: WBX (0x0053)
|   |   |   |   Antennas: TX/RX, RX2
|   |   |   |   Freq range: 68.750 to 2200.000 Mhz
|   |   |   |   Gain range PGA0: 0.0 to 31.5 step 0.5 dB
|   |   |   |   Connection Type: C
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: USRP-N210 adc - ads62p44
|   |   |   |   Gain range digital: 0.0 to 6.0 step 0.5 dB
|   |   |   |   Gain range digital-fine: 0.0 to 0.5 step 0.1 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: USRP-N210 dboard (tx unit)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Subdev: WBX (0x0052)
|   |   |   |   Antennas: TX/RX
|   |   |   |   Freq range: 68.750 to 2200.000 Mhz
|   |   |   |   Gain range PGA0: 0.0 to 25.0 step 0.1 dB
|   |   |   |   Connection Type: C
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: USRP-N210 dac - ad9777
|   |   |   |   Gain Elements: None
----------------------

----- <prefix>/share/uhd/examples/rx_timed_samples -----
Mac OS; GNU C++ version 4.2.1 (Apple Inc. build 5664); Boost_104500; 
UHD_002.20110204025144.dfb3ed0


Creating the usrp device with: ...
mboard0 MIMO master
Using Device: Single USRP:
  Device: USRP2/N Series device
  Mboard 0: USRP-N210 mboard
  RX DSP 0: USRP-N210 ddc0
  RX Channel: 0
    RX Dboard: USRP-N210 dboard (rx unit)
    RX Subdev: WBX (0x0053)
  TX DSP 0: USRP-N210 duc0
  TX Channel: 0
    TX Dboard: USRP-N210 dboard (tx unit)
    TX Subdev: WBX (0x0052)

Setting RX Rate: 6.250000 Msps...
Actual RX Rate: 6.250000 Msps...

Setting RX Freq: 0.000000 Mhz...

Warning:
    The hardware does not support the requested RX frequency:
    Target frequency: 0.000000 MHz
    Actual frequency: 100.000000 MHz
Actual RX Freq: 100.000000 Mhz...

Setting device timestamp to 0...

Begin streaming 1000 samples, 3.000000 seconds in the future...
Got packet: 362 samples, 3 full secs, 0.000000 frac secs
Got packet: 362 samples, 3 full secs, 0.000058 frac secs
Got packet: 276 samples, 3 full secs, 0.000116 frac secs

Done!

--------------------------------------------------------

Thanks for any help you have!
-J