Hi all, I am using USRPN200. I have a query related to the signal repetitions related to sample rate. here is the problem. 1. I set USRP center frequency at 5 MHz.so, getting a spectrum from 0 to 5 MHz when center frequency is 2.5 MHz (Complex signal analysis). 2. I tuned at 1MHz for baseband signal (USRP's center is still 5 MHz) and listened the audio. 3. I changed the center frequency of USRP from 2.5 MHz to 4.5 MHz and received spectrum from 2 MHz to 7 MHz. 4. Now I tuned baseband at 6 MHz (1 MHz +5 MHz) and listened the channel. It was the same channel when received at 1 MHz. I have provided one frequency but it happens to all frequencies. A repeatition of channels is observed according to sample rate. When I change the sample rate from 5 Mhz to 10 MHz, the signals repeat after 10 MHz instead of 5 MHz. It may be arising due to CIC filters, DDC of USRPs. I am not sure. My question are a. why USRP is showing such kind of behavior? b. How I can avoid this phenomenon in my program?
Regards, Munir
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