Hi,
I have a USRP N210 with basicRX daughterboard. I ran
uhd_wbfm_receive.grc application. But I cannot tune to
any FM radio station. I get warning like
UHD Warning:
The hardware does not support the requested RX frequency:
Target frequency: 88.500000 MHz
Actual frequency: -11.500000 MHz
gr_fir_ccf: using SSE
gr_fir_fff: using SSE
audio_alsa_sink[hw:0,0]: unable to support sampling rate 40000
card requested 44100 instead.
There was a similar post in the archive, but the reply said, it is
ok to get this warning. If the card supports 88.5 MHz, then why
is it not able to receive the station?
I read somewhere that basicRX daughterboard needs an external
RF component. Is the problem arising because I do not have an
external RF component? If so, what kind of external RF component
I should buy (from Ettus?)?
Here is the usrp_probe output
linux; GNU C++ version 4.4.6 20120305 (Red Hat 4.4.6-4); Boost_104100;
UHD_003.004.003-221-g9d6f9492
– Opening a USRP2/N-Series device…
– Current recv frame size: 1472 bytes
– Current send frame size: 1472 bytes
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The recv buffer could not be resized sufficiently.
Target sock buff size: 50000000 bytes.
Actual sock buff size: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.rmem_max=50000000
UHD Warning:
The send buffer could not be resized sufficiently.
Target sock buff size: 1048576 bytes.
Actual sock buff size: 131071 bytes.
See the transport application notes on buffer resizing.
Please run: sudo sysctl -w net.core.wmem_max=1048576
– Detecting internal GPSDO… not found
UHD Warning:
Unable to set the thread priority. Performance may be negatively
affected.
Please see the general application notes in the manual for
instructions.
EnvironmentError: OSError: error in pthread_setschedparam
/
| Device: USRP2 / N-Series Device
| _____________________________________________________
| /
| | Mboard: N210r4
| | hardware: 2577
| | mac-addr: a0:36:fa:25:40:2f
| | ip-addr: 192.168.10.2
| | subnet: 255.255.255.255
| | gateway: 255.255.255.255
| | gpsdo: none
| | serial: E2R20PFUP
| | FW Version: 12.3
| | FPGA Version: 10.0
| |
| | 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: Basic RX (0x0001)
| | | Serial: EAR00ZFRB
| | | _____________________________________________________
| | | /
| | | | RX Frontend: AB
| | | | Name: BasicRX (AB)
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Frontend: BA
| | | | Name: BasicRX (BA)
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: QI
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Frontend: A
| | | | Name: BasicRX (A)
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: I
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Frontend: B
| | | | Name: BasicRX (B)
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: Q
| | | | 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
| | | _____________________________________________________
| | | /
| | | | TX Frontend: 0
| | | | Name: Unknown (0xffff) - 0
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: 0.000 to 0.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | TX Codec: A
| | | | Name: ad9777
| | | | Gain Elements: None
thanks.