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diff --git a/README.md b/README.md new file mode 100644 index 0000000..8a27f87 --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +Measure amplifier non-linearity using two-tone signal +===================================================== + +HOWTO +----- + + # Take a USRP B200 + # Connect its TX to the amplifier you want to measure + # Connect the amp to an big enough attenuator + # Connect to the B200 RX + +The amplitude ramp script is going to generate a two-tone (1kHz separation) +signal at 222MHz, and record outgoing signal magnitude and phase difference +against the source signal. The measurements are written into a CSV file. + +It's your job to ensure you don't overload the B200 input signal power (-15dBm +last time I checked). + +First step is to gather some measurements: + + ./amplitude_ramp.py --ampl-start 0.15 --ampl-stop 0.5 --ampl-step 0.01 --num-meas 300 --txgain 77 + +This creates a measurement.csv file you can analyse with + + ./plot.py + +That's it for now. |