[Discuss-gnuradio] why is bandwidths of benchmark_tx.py and tunnel are different

[Weixian Zhou]

I noticed that the bandwidths of benchmark_tx.py is wide and tunnel.py is narrow in the same frequency and same bit rate. I run uhd_fft on machine A, then run 
./benchmark_tx.py -f 2.42G -r 1M

and 

sudo ./tunnel.py -f 2.42G -r 1M

on machine B in turn. I got the uhd_fft wave as attached. Anyone can explain why it happens? And is there any way to tune the bandwidth of benchmark and tunnel?

--

Regards,

Weixian Zhou

benchmark.png
Description: PNG image

tunnel.png
Description: PNG image