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From: | mleech |
Subject: | Re: [Discuss-gnuradio] Rate of uhd_source |
Date: | Mon, 07 May 2012 10:11:49 -0400 |
User-agent: | Roundcube Webmail/0.5.1 |
On Mon, 7 May 2012 10:50:18 -0300, Loic Danceg wrote:
Hi everybody,
I try to use the function uhd.usrp_source.
It works well with the default rate
parser.add_option("-s", "--samp-rate", type="eng_float", default=1e6,
help="set sample rate (bandwidth) [default=%default]")
But i would like to have a better rate (1e9), and if i change that, it didn't works.
Someone know why?
Thank you a lot!
self.u = uhd.usrp_source(device_addr=options.args,
stream_args=uhd.stream_args('fc32'))
# Set the subdevice spec
if(options.spec):
self.u.set_subdev_spec(options.spec, 0)
self.u.set_samp_rate(options.samp_rate)
Requested sample rates from UHD hardware must be proper divisors of the master sampling rate on the hardware. For USRP1/B100/E100, that's 64Msps, and for N2XX it's 100Msps.
Typically, sample rates between master_rate/4 to master_rate/512 are supported.
A sample rate of 1e9 is not a valid sample rate--and seriously 1 Gigasample/second? You really expected your computer to keep up to 1 GigaSample/second?
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