Tools
A quick look at a raw IQ capture, with constellation, spectrum, spectrogram, and the usual hardware impairments, all computed in your browser so nothing is uploaded.
Drop a capture here or click to choose one
cf32 · int16 · int8 · uint8 (rtl_sdr) · float64 · .npy · SigMF (select .sigmf-meta and .sigmf-data together)
Capture
Constellation
Power spectrum (relative dB)
Spectrogram (time down, frequency across, 60 dB range)
Receiver profile
The measured half comes from this capture, and the fields below cover what a
capture can't know about itself. It is written as a SigMF metadata fragment with a
draft receiver extension namespace, so it can sit alongside a
recording's .sigmf-meta or be attached to a dataset or model entry.
Analyzes up to the first 1,048,576 samples. Integer formats are scaled to full scale so dBFS and clipping readouts are meaningful; float formats are reported in raw units. DC offset and I/Q imbalance are estimates that assume a roughly circular signal, so they will be off on a single tone or a very narrowband capture. Raw files with a generic extension (.iq, .raw, .bin, .dat) are assumed to be float32; pick the format manually if the constellation looks wrong.