USRP - daughterboard installation issue

Question

I'm trying to receive a signal whith a center frequency equal to 2e8Hz and a bandwith slightly smaller than 2e5Hz with my USRP X310. I use the rx_sampletofile.cpp func of uhd 3.10.1 as shown :

./rx_sampletofile --file test.bin --duration --rate 4e8 --nsamps 4e8 1 --freq 2e8 --type float --bw 8e7 --skip-lo

When I look at the terminal, everything is executed without error or warnings but I see that the actual rx frequency isn't changed afterall ...

Setting RX Rate: 20.000000 Msps...
Actual RX Rate: 20.000000 Msps...

Setting RX Freq: 200.000000 MHz...
Setting RX LO Offset: 0.000000 MHz...
Actual RX Freq: 0.000000 MHz...

Setting RX Bandwidth: 0.250000 MHz...
Actual RX Bandwidth: 0.250000 MHz...

I tried to change RX Freq to lower freq and also--lo-offset but it always stays at RX Freq = 0Hz so if you have any idea I'll take it.

Thanks

It appears that my issue is finally related to the daughterboards because the drivers don't detect them well. Daughterboard Issue :

         _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |   ID: Unknown (0x0095)
|   |   |   Serial: 31F94F3
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: 0
|   |   |   |   Name: Unknown (0x0095) - 0
|   |   |   |   Antennas:
|   |   |   |   Sensors:
|   |   |   |   Freq range: 0.000 to 0.000 MHz
|   |   |   |   Gain Elements: None
|   |   |   |   Bandwidth range: 0.0 to 0.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: ads62p48
|   |   |   |   Gain range digital: 0.0 to 6.0 step 0.5 dB
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: B
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: 0
|   |   |   |   Name: Unknown (0xffff) - 0
|   |   |   |   Antennas:
|   |   |   |   Sensors:
|   |   |   |   Freq range: 0.000 to 0.000 MHz
|   |   |   |   Gain Elements: None
|   |   |   |   Bandwidth range: 0.0 to 0.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: B
|   |   |   |   Name: ads62p48
|   |   |   |   Gain range digital: 0.0 to 6.0 step 0.5 dB
|   |     _____________________________________________________

Answer 1

Your UHD is too old for your hardware revision of the TwinRX daughterboard.

The only solution is to use a more modern version of UHD. This will also require you to load a more modern version of the FPGA image.