[Hackrf-dev] Bandwidth control

[김상혁]

I heard HackRF One support up to 20 MHz of bandwidth.

But, I can’t handle this value properly. I tried to adjust bandwidth on GNURadio-Companion by changing some value o

1) Osmocom sink (Ch0: Bandwidth) - It was initialized by 0 and it means automatic setting. I vary this value but, never effect.
2) Modulation (Excess BW) - It means Root-raised cosine filter excess bandwidth (float) and usually range of ~ 0.35. When I change this value, it was little effect on bandwidth(larger value is more bandwidth)
3) Sample rate - I found that sample rate is directly related with bandwidth. I tried adjust this and it was so cool. When I use large value of amp_rate, however, the FFT plot graph was stutter. Is it computational problem? 

I’m curious to how to control bandwidth up to 20MHz. 

Thanks for any reply

Shawn.