I have tried setting the Tx filters analog filters using the recommandations from this link : https://wiki.analog.com/resources/tools-software/linux-drivers/iio-transceiver/ad9361#tx_rf_bandwidth_control
I am setting out_voltage_rf_bandwidth to 200 kHz. Are there any indication of what is actually configured?
I have trouble caracterizing the resulting filter's cutoff frequency and slope. Below is the curve I got by generating sine waves at various frequencies with a filter bandwidth of 200 kHz.
As you can see, the 200 kHz (actually +/- 100 kHz, if I am not mistaken) is not the corner frequency. The slope is about -12 dBm/MHz.
Does any have any guidance on this?
Thank you very much.