OnAirDecode PSK demodulator with an SDR
PSK demodulator: blind symbol rate and order, constellation, bits.
- In the mode list
- BPSK / QPSK, any rate
What PSK demodulator is
General BPSK / QPSK / OQPSK / 8PSK demodulator and analyser for satellite and other PSK signals: finds the signal nearest the dial, measures its symbol rate (any rate the radio holds, from about 50 Bd), order, pulse shape, carrier, Doppler and Eb/N0 by itself, then demodulates it with a constellation and eye diagram, follows the Doppler of a pass, decodes differential coding and the G3RUH /….
Frequencies and settings
OnAir takes any frequency you type; the numbers above are the mode's starting point and the range its table describes. In the app the shortcut label is BPSK / QPSK, any rate.
What OnAir shows
General BPSK / QPSK / OQPSK / 8PSK demodulator and analyser for satellite and other PSK signals: finds the signal nearest the dial, measures its symbol rate (any rate the radio holds, from about 50 Bd), order, pulse shape, carrier, Doppler and Eb/N0 by itself, then demodulates it with a constellation and eye diagram, follows the Doppler of a pass, decodes differential coding and the G3RUH / CCSDS scramblers, finds a sync word and saves the bits. Receive only; (checked against generated signals only).
Limits and what it was checked with
Checked with generated signals and impairments; recordings of real signals welcome.
Which radio you need
Any radio that tunes this range works. An RTL-SDR covers roughly 24 MHz to 1.7 GHz, and every other radio in the radio guide reaches it too. Antenna height and a clear view of the transmitter matter most.
Receiving and the law
Questions about PSK demodulator
Can I decode PSK demodulator with an RTL-SDR?
Usually yes for narrowband signals, as an RTL-SDR tunes roughly 24 MHz to 1.7 GHz at up to about 2.4 Msps. Wide signals such as TV channels need a faster radio, and OnAir says next to the source what the selected radio can do.
Is it legal to receive PSK demodulator?
Receiving satellite downlinks is generally legal. Encrypted or spread content is not decoded, and voice codecs that are patented are not shipped with OnAir.
Can I try PSK demodulator in OnAir without a radio?
Yes. Most modes include a built-in synthetic test signal, so you can open the screen and try the controls before you own a radio.