[Discuss-gnuradio] N210 XCVR2450

[Burak Kelleci]

Hi,

I am trying to send data from a N210+XCVR2450 to another N210+XCVR2450.
Both equipment have antennas connected at J2 antenna input and they are
connected to the same computer using 2 gigabit ethernet ports. I have
assigned different ip addresses and executing "uhd_find_devices" gives the
following result

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    type: usrp2
    addr: 192.168.20.2
    name: 
    serial: E2R12XEUP


--------------------------------------------------
-- UHD Device 1
--------------------------------------------------
Device Address:
    type: usrp2
    addr: 192.168.10.2
    name: 
    serial: E3R12X7UP

Executing uhd_usrp_probe --args=addr=192.168.10.2 gives

linux; GNU C++ version 4.5.2; Boost_104200; UHD_003.002.000-0e6441c

-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
  _____________________________________________________
 /
|       Device: USRP2 / N-Series Device
|     _____________________________________________________
|    /
|   |       Mboard: USRP-N210
|   |   rev: 2561
|   |   mac-addr: a0:36:fa:25:32:37
|   |   ip-addr: 192.168.10.2
|   |   gpsdo: none
|   |   serial: E3R12X7UP
|   |   
|   |   Time sources: none, external, _external_, mimo
|   |   Clock sources: internal, external, mimo
|   |   Sensors: mimo_locked, ref_locked
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   Freq range: -50.000 to 50.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 1
|   |   |   Freq range: -50.000 to 50.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |   ID: XCVR2450 (0x0061)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Subdev: 0
|   |   |   |   Name: XCVR2450 (0x0061)
|   |   |   |   Antennas: J1, J2
|   |   |   |   Sensors: lo_locked, rssi
|   |   |   |   Freq range: 2400.000 to 6000.000 Mhz
|   |   |   |   Gain range LNA: 0.0 to 30.5 step 15.0 dB
|   |   |   |   Gain range VGA: 0.0 to 62.0 step 2.0 dB
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: ads62p44
|   |   |   |   Gain range digital: 0.0 to 6.0 step 0.5 dB
|   |   |   |   Gain range fine: 0.0 to 0.5 step 0.1 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   Freq range: -250.000 to 250.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |   ID: XCVR2450 (0x0060)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Subdev: 0
|   |   |   |   Name: XCVR2450 (0x0060)
|   |   |   |   Antennas: J1, J2
|   |   |   |   Sensors: lo_locked
|   |   |   |   Freq range: 2400.000 to 6000.000 Mhz
|   |   |   |   Gain range VGA: 0.0 to 30.0 step 0.5 dB
|   |   |   |   Gain range BB: 0.0 to 5.0 step 1.5 dB
|   |   |   |   Connection Type: QI
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: ad9777
|   |   |   |   Gain Elements: None

Executing uhd_usrp_probe --args=addr=192.168.20.2 gives

linux; GNU C++ version 4.5.2; Boost_104200; UHD_003.002.000-0e6441c

-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
  _____________________________________________________
 /
|       Device: USRP2 / N-Series Device
|     _____________________________________________________
|    /
|   |       Mboard: USRP-N210
|   |   rev: 2561
|   |   mac-addr: a0:36:fa:25:32:2e
|   |   ip-addr: 192.168.20.2
|   |   gpsdo: none
|   |   serial: E2R12XEUP
|   |   
|   |   Time sources: none, external, _external_, mimo
|   |   Clock sources: internal, external, mimo
|   |   Sensors: mimo_locked, ref_locked
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   Freq range: -50.000 to 50.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 1
|   |   |   Freq range: -50.000 to 50.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |   ID: XCVR2450 (0x0061)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Subdev: 0
|   |   |   |   Name: XCVR2450 (0x0061)
|   |   |   |   Antennas: J1, J2
|   |   |   |   Sensors: lo_locked, rssi
|   |   |   |   Freq range: 2400.000 to 6000.000 Mhz
|   |   |   |   Gain range LNA: 0.0 to 30.5 step 15.0 dB
|   |   |   |   Gain range VGA: 0.0 to 62.0 step 2.0 dB
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: ads62p44
|   |   |   |   Gain range digital: 0.0 to 6.0 step 0.5 dB
|   |   |   |   Gain range fine: 0.0 to 0.5 step 0.1 dB
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   Freq range: -250.000 to 250.000 Mhz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |   ID: XCVR2450 (0x0060)
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Subdev: 0
|   |   |   |   Name: XCVR2450 (0x0060)
|   |   |   |   Antennas: J1, J2
|   |   |   |   Sensors: lo_locked
|   |   |   |   Freq range: 2400.000 to 6000.000 Mhz
|   |   |   |   Gain range VGA: 0.0 to 30.0 step 0.5 dB
|   |   |   |   Gain range BB: 0.0 to 5.0 step 1.5 dB
|   |   |   |   Connection Type: QI
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: ad9777
|   |   |   |   Gain Elements: None

Both devices have UHD-images-003.002.000 fw and fpga built. I have tried
usrp_n210_r4_fpga.bin and usrp_n210_r2_fpga.bin FPGA images. They both give
similar performances. Couple of days ago I have compiled UHD and gnuradio
after I get the latest version from git repository.

Since I don,t have a spectrum analyzer, I can not check the output of TX.
Both devices are tuned to the same frequency I am expecting to get some
signal at the RX. Till now I have received only noise.

There is a 2.4GHz WLAN in the building and I tried to capture WLAN signals
using uhd_fft.py but this also failed.

I have attached gnuradio-companion file that I used and screen captures.

Is there anything I am missing? Any suggestions?

Regards,

Burak Kelleci

uhd_test.png
Description: PNG image

uhd_test.grc
Description: Binary data

UHD_Result.png
Description: PNG image