FMCOMMS3 I/Q file export

Are you using IIO GUI to configure AD9361?

If yes, then you can go to the file tab under the ADI IIO oscilloscope FFT capture and then click on" save as" to save the IQ file.

Refer to the below link:

https://wiki.analog.com/resources/tools-software/linux-software/iio_oscilloscope 

Thank you.

I am using GUI and I export data file from FFT capture. 

Is it possible to have in the header signal information (fc, bw, sample rate, rssi...)?

You can save the file in vsa format but in that case you will get information only about the center frequency and the plot min and max frequency(+/-fs/2) in the header file. Getting RSSI and BW information in the header file is not possible.

Thank you.

Is it possible to save rssi in a file?

I need to synchronize rssi information and I/Q samples exported and save also rssi values in a file. 

Is it possible?

You can read back the RSSI symbol and preamble registers (0x1A7 and 0x1A8 )continuously and then store those values in a text file.

Where can I find and read RSSI symbol and preamble registers?

I read the rssi value from gui or from in_voltage0_rssi, is this correct? Yes.

There is no way to save the RSSI values in a file other than reading and manually writing it to a file.

The RSSI values for a fixed input and  gain setting remains almost the same with time and hence it will synchronise with your saved  I Q samples.

You may save the IQ data into a file continuously as below and then read and save the RSSI value in to the same file.

https://ez.analog.com/linux-device-drivers/linux-software-drivers/f/q-a/87120/ad9361-receiver-data-capture-by-using-libiio/133512

https://ez.analog.com/linux-device-drivers/linux-software-drivers/f/q-a/87755/capturing-and-writing-the-iq-data-using-ad9361_iiostream-c/177112