Minimum TX bandwidth


I am running a flow graph to test the TX of my LimeSDR. I am using the parameters shown on the flow graph and running GNUradio on a Linux PC. I have the bandwidth at 25kHz since I do not want to take up much of the amateur band. I am getting this error.

RuntimeError: Tx lpf(0.025 MHz) out of range 5-40 MHz and 50-130 MHz

What is the minimum bandwidth I can input to run GNUradio TX. I cannot find a specific bandwidth on the datasheet.


Clue is in the error message, tx low pass filter range from 5MHz to 130MHz