Hi all, I'm new in this world... but I'm trying to understand the program usrp_spectrum_sense.py.
I want to know how many samples my usrp capture at a given time period. It should theoretically capture in n seconds----------> USRP_RATE x n seconds. For example in 10 seconds => 4 MS/s x 10s = 40M Samples in 60 seconds => 4 MS/s x 60s = 240M Samples in 120 seconds => 4 MS/s x 120s = 480M Samples I use the default values. But in my case when I lunch the program with an appropriate counter in the usrp_source_base.cc file , I check the number of samples captured and in nine different experiments they are: 1) experiment in 10 seconds => 7.18193 e7 Samples 2) experiment in 60 seconds => 3.60591 e8 Samples 3) experiment in 120 seconds => 1.25783 e9 Samples 4) experiment in 10 seconds => 8.82063 e7 Samples 5) experiment in 60 seconds => 3.4864 e8 Samples 6) experiment in 120seconds => 1.22311 e9 Samples 7) experiment in 10 seconds => 5.97432 e7 Samples 8) experiment in 60 seconds => 4.15018 e8 Samples 9) experiment in 120 seconds => 7.2589 e8 Samples How is possible that these values don't correspond to the theoretical values?? And why is the real USRP_RATE different?
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