New answers tagged frequency
1
500 kHz = 0.5 MHz = 0.0005 GHz.
You're providing a signal at +500 kHz, and then upconverting it to produce a signal at 2.5005 GHz. Are you sure that your measurement of the output frequency (and the USRP's oscillator) is precise enough to distinguish between 2.5000 GHz and 2.5005 GHz, absolute?
A way to tell if your signal generation is having any effect is ...
2
You've got a few very concerning conceptual and technical problems there, many of which will be adressed by the console output, which you should probably read!
You can only sweep within your nyquist bandwidth. That is at most 25 MS/s (at 16 bit sample depth) or 50 MS/s (at 8 bit sample depth) for the N210
You want a single-tone sweep from negative baseband ...
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