ADALM PLUTO SDR

You can use iio-oscilloscope to plot the signal received on Rx. You can use a loopback cable between Rx and Tx to check out what was received.

Alternatively from the AD9361 Advanced iio-oscilloscope plugin, from the BIST tab, you can set Digital Tx->Digital Rx loopback. 

Thank you so much, ASuciu

I have another question, I am using two Adam Pluto, one for the transmitter and the other for receiving. 

Even though, I config the center frequency and baseband sample rate to be exactly the same for two Adalm Pluto, however, when I try to plot the received signal, the received signal is look like a distorted amplitude.  (Please refer to figure 1 and Figure 2). Can you tell me why it is happening with the received signal?

Thank you so much

Figure 1: transmitted signal

Figure 2: Received signal

There is a configurable attenuation on the receive path.

The inputs can be scaled using automatic gain control (AGC) so the receiver sensitivity is scaled according to the received signal. 

Thank you so much,

Can you tell me how to fix this problem?

Thank you so much,

Can you tell me how to fix this problem?