Thank you Jason, I could able to see the exact waveform of the samples from One USRP2 to another USRP2. But i found the scaling of the amplitude when I see from usrp2_fft.py and attaching a Scope Sink (like oscilloscope scope sink), there is much variance, which usrp2_fft.py is showing much amplified scale, but the real one of Scope Sink in the GRC is showing very very low amplitude factor, Is there any understanding is required here? And if i want to get some amplified result what to be done?

best regards,
srinivas.

Jason Uher wrote:
On Wed, Jan 27, 2010 at 3:31 AM, srinivas naga vutukuri
<srinivas.vutuk...@gmail.com> wrote:
Am sending a +1 to -1 amplitude square wave samples from Tx and when i
capture on Rx end its not almost a square wave. I have generated the above

I believe this is the maximum output power for the USRP2, and your are
likely seeing distortions from the non-linearity of the circuits
involved.  I'm not sure what the linear range is for your
daughterboards, but try turning it down to +/- 0.3 and see what
happens.

Also, make sure that your decimation/interpolation factors are
correct.  That is, if the DAC and ADC are operating at different
sample rates, you have to adjust your int/dec factors or samples per
symbol accordingly.

Jason




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