Re: [Discuss-gnuradio] Any way to sample/log the 50Mhz ISM signal in gnuradio with USRP2?

[Marcus Müller]

Just a side note: the 100MHz master sample clock rate of the USRP2 platform is *complex* sampling, so internally the USRP2 processes 100MHz of bandwidth (not 50!), but that's far too much to get it out via gigabit ethernet, and so it decimates these 100MHz down to the sampling rate you request as a user.

On 12.07.2014 04:20, Yingjie Chen wrote:

Hi guy,

Thanks in advance.

Currently I am implementing a project based on ofdm_bentchmark  example
with USRP2. I remember that the sample rate of ADC of USRP 2 with RF2450
can be up to 100MS/s. That means we can use USRP2 to capture at most 50Mhz
bandwidth signal.

Initially, I plan to log the signal on my computer (*save as dat. format)*
and analyze it offline. Everything is fine when the sample rate(bandwidth)
is set to 20MS/s in terminal. However, when we set the sample rate up to
50MS/s, nothing can be log in my computer. I guess there some software
limitations in Gnuradio.

My question is how to remove such limitation to achieve the 50MS/s sample
rate. Any help will be greatly appreciated.

Best,
Kay

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