[Discuss-gnuradio] UHD + USRP2, not working with RFX400

[Gaetano Mendola]

Hi,
I was able to install the UHD on my host and as well the firmware on the SSD,
I changed the USRP2 ip address to 192.168.0.2.

The uhd_find_devices correctly finds the device:

$ uhd_find_devices
linux; GNU C++ version 4.4.3; Boost_104000; UHD_002.20110131232513.d46058d

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    type: usrp2
    addr: 192.168.0.2
    name:
    serial: 997

so far so well.

Launching the example ./tx_waveforms --freq 430000000 --duration 60000
however I do not get the expected result (I don't see the beacon on my
frequency
analyzer), using a WBX all seems working fine.

Using RFX400:

./tx_waveforms --freq 430000000 --duration 60000
linux; GNU C++ version 4.4.3; Boost_104000; UHD_002.20110131232513.d46058d

Creating the usrp device with: ...
Current recv sock buff size: 50000000 bytes
mboard0 MIMO master
Using Device: Single USRP:
  Device: USRP2/N Series device
  Mboard: USRP2-REV4 mboard
  RX DSP: USRP2-REV4 ddc0
  RX Channel: 0
    RX Dboard: USRP2-REV4 dboard (rx unit)
    RX Subdev: RFX400 (0x0024)
  TX DSP: USRP2-REV4 duc0
  TX Channel: 0
    TX Dboard: USRP2-REV4 dboard (tx unit)
    TX Subdev: RFX400 (0x0028)

Setting TX Rate: 1.500000 Msps...

Warning:
    The hardware does not support the requested TX sample rate:
    Target sample rate: 1.500000 MSps
    Actual sample rate: 1.492537 MSps
Actual TX Rate: 1.492537 Msps...

Setting TX Freq: 430.000000 Mhz...
Actual TX Freq: 430.000000 Mhz...

Setting TX Gain: 0.000000 dB...
Actual TX Gain: 0.000000 dB...


and this using the WBX:


$ ./tx_waveforms --freq 430000000 --duration 60000
linux; GNU C++ version 4.4.3; Boost_104000; UHD_002.20110131232513.d46058d


Creating the usrp device with: ...
Current recv sock buff size: 50000000 bytes
mboard0 MIMO master
Using Device: Single USRP:
  Device: USRP2/N Series device
  Mboard: USRP2-REV4 mboard
  RX DSP: USRP2-REV4 ddc0
  RX Channel: 0
    RX Dboard: USRP2-REV4 dboard (rx unit)
    RX Subdev: WBX (0x0053)
  TX DSP: USRP2-REV4 duc0
  TX Channel: 0
    TX Dboard: USRP2-REV4 dboard (tx unit)
    TX Subdev: WBX (0x0052)

Setting TX Rate: 1.500000 Msps...

Warning:
    The hardware does not support the requested TX sample rate:
    Target sample rate: 1.500000 MSps
    Actual sample rate: 1.492537 MSps
Actual TX Rate: 1.492537 Msps...

Setting TX Freq: 430.000000 Mhz...
Actual TX Freq: 430.000000 Mhz...

Setting TX Gain: 0.000000 dB...
Actual TX Gain: 0.000000 dB...


Has anyone got same issue using UHD + USRP2( RFX400) ?

Regards
Gaetano Mendola

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