The High Striker, or "how strong is my SDR signal?"
summary
Explains how to map digital sample levels to absolute analog power by calibrating 0 dBFS to a measured dBm using GNU Radio/UHD and USRP hardware, with an external power meter. Demonstrations use a V200 mini transmitter into an X300 receiver, showing a -25 dBm test where receiver and generator agree, and warning that ADC clipping occurs when gain is too high. Presents a calibration tool that sweeps gains and frequencies to produce TX/RX response curves (shows power roll‑off with frequency), notes windowing changes FFT bin power and that external calibrated meter required for accurate results.
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chapters (9)
- 0:00Start
- 3:07Decibels
- 16:05Factory Calibration
- 20:42What Happens if I Drag the Slider to the Left
- 23:00How Is the User Calibrated
- 23:37Transmit Response
- 24:45Choice of Window Function
- 25:50Calculate Power in the Frequency Domain
- 27:40Spectral Estimation
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