On 2022-04-13 13:32, Lautaro Lorenzen wrote:
Hi everyone,

I'm trying to run a simple example on an Ettus E310.
I'm using an E312 with UHD 4.1.0.5 and gnuradio v3.8.0.5.

Everything seems to work okay, but I can not manage to get the second channel (TRX-B) to transmit anything. FYI: I can receive from both channels RX-A and RX-B. The problem came up when I tried to transmit something via gnu-radio, changing the "subdev" arg to "A:1" instead of leaving it blank as I normally do. When I pressed start, everything seemed to compile fine, but the GUI freezes (something that did not happen when using TRX-A).

To see if gnu-radio was the problem, I logged in the embedded linux and tried some uhd examples from usr/lib/uhd/examples. As expected, I ran ./tx_waveforms --rate 1e6 --freq 100e6 --subdev A:0 and the tx light turned on and I could see something on my oscilloscope. Also, a few "LLLLL" appeared on the console.

When I ran:
./tx_waveforms --rate 1e6 --freq 100e6 --subdev A:1, everything looks the same but no light, no signal, and no "LLLLL" are displayed on the console. Just the message "press ctrl+C to stop streaming".

Any help would be very much appreciated.
Regards,
Lautaro.


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IF you run:

uhd_config_info --version

On the actual E312, what does it return?

Also, what does:

uhd_usrp_probe

Return (again, on the device itself).

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