Hi, Sorry about the scope file, I using a modified version and it seems that I being confused with the standrad one. However, there is something strange in the data shown in your picture. Since you are using decimation =8, the data coming across the USB should be complex 8 Msps. But your scope is showing ([EMAIL PROTECTED]: 4M) which is wrong. another thing, the DDC be should equal 0 , while in your picture it is being (DDC : -8M) !!!!.
Firas Aadil Volkwin <[EMAIL PROTECTED]> wrote: The Scope was definitely usrp_oscope.py Used Directly from the from the examples folder: [EMAIL PROTECTED]:~/Desktop/GnuRadioResources/gnuradio-3.0.2/gnuradio-examples/python/usrp$ ./usrp_oscope.py Aadil On 10/11/2007, Firas abbas <[EMAIL PROTECTED]> wrote: Hi, Input signal level is ok.The scope pictures was not generated by usrp_oscope.py. What is the program used to generate it ? Test The signal with usrp_oscope.py Firas Aadil Volkwin <[EMAIL PROTECTED]> wrote: Hi, I've updated the scope screenshot on the website. Two shots are available, notice there seems to be some kind of modulation??? I've tested the input signal with an external scope and the input signal is fine. I don't know why the usrp scope is "misbehaving" The input signal level is set at -16.02dBm Aadil On 10/11/2007, Firas abbas < [EMAIL PROTECTED] > wrote:Hi, Use center frequency =0 in the usrp scope. If you use center frequency = 250K, you will shift the signal to 0 Hz. What is your signal input level in dBm ? Firas Aadil Volkwin < [EMAIL PROTECTED]> wrote: Hi, Firstly my apologies for posting known quantities, I guessed that members would like to see in what way I tinkered with usrp_rx_cfile.py. point taken though. Screen shots of the MATLAB plots as well as the usrp_oscop.py output can be found at: https://rrsg.ee.uct.ac.za/members/aadil/ I'm pretty sure the MATLAB is correct. I have upped the input freq to 250KHz, now attempting a square wave (in desperation) and set the options.freq to 0 in ---> self.u.tune(0, self.subdev, options.freq) I'm Still not getting sensible plots. Thanks again, Aadil
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