[Hackrf-dev] Can hackrf support 23.04M sampling rate?

[Michael Ossmann]

I can get 21.5 Msps reliably on one USB port on my laptop.  That is the
fastest consistent speed I have seen.  The maximum speed seems to depend
on the USB host controller.


On Sun, May 04, 2014 at 09:16:42PM +0800, Jiao Xianjun wrote:

>

> I change to another usb port, the rate is increased to 38.3MiB/second.

> Seems that it is impossible for my computer (thinkpad T410) to support rate

> larger than 19.15Msps?

> 

> 

> On Sun, May 4, 2014 at 9:07 PM, Jiao Xianjun <putaoshu at gmail.com> wrote:

> 

> > Hi,

> >

> > I try to run hackrf at 23.04Msps, and get:

> >

> >

> > ------------------------------------------------------------------------------------------------

> > hackrf_transfer -f 2000000000 -r tmp.bin -n 100000000 -s 23040000

> > call hackrf_sample_rate_set(23040000 Hz/23.040 MHz)

> > call hackrf_baseband_filter_bandwidth_set(20000000 Hz/20.000 MHz)

> > call hackrf_set_freq(2000000000 Hz/2000.000 MHz)

> > samples_to_xfer 100000000/100Mio

> > Stop with Ctrl-C

> > 34.1 MiB / 1.000 sec = 34.1 MiB/second

> > 34.3 MiB / 1.000 sec = 34.3 MiB/second

> > 34.1 MiB / 1.000 sec = 34.1 MiB/second

> > 34.3 MiB / 1.000 sec = 34.3 MiB/second

> > 34.3 MiB / 1.000 sec = 34.3 MiB/second

> > 28.8 MiB / 1.000 sec = 28.8 MiB/second

> >

> > User cancel, exiting...

> > Total time: 6.00102 s

> > hackrf_stop_rx() done

> > hackrf_close() done

> > hackrf_exit() done

> > fclose(fd) done

> > exit

> >

> > ------------------------------------------------------------------------------------------------

> >

> > Does that mean hackrf support 23.04Msps, but seems there is packet loss?

> > (according to reported MiB/second)

> >

> > BR

> >

> > Jiao Xianjun

> >

> >



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