Modes

All 120 modes of OnAir, grouped as in the app, and the Plugins entry. Open a mode for its default frequency, sample rate, screens and tips.

TV

• DVB: DVB-T2 and DVB-T, automatic (Europe, Middle East, Africa, Asia, Australia)
• ATSC: ATSC 1.0, 8-VSB (US, Canada, Mexico, South Korea)
• ATSC 3.0: ATSC 3.0, NextGen TV
• ISDB-T: ISDB-T (Japan, Brazil, South America)
• DVB-S/S2: DVB-S / S2 / S2X satellite television, needs a dish and an LNB
• DTMB: DTMB digital terrestrial television (China, Hong Kong, Macau, Cuba, Pakistan)
• DVB-C: DVB-C digital cable television, needs the cable network as the input (not an antenna)
• Analog TV: Analogue television (PAL, SECAM, NTSC)
• MAC: MAC/packet satellite TV: picture, 4:3 / 16:9, channel name, digital sound, EuroCrypt detected
• FPV video (analog): analog drone video links on 5.8 GHz and 1.2 GHz: channels, scan, live picture with sound

Broadcast radio

• DAB / DAB+: DAB and DAB+ digital radio
• FM: FM broadcast radio with stereo and RDS
• DRM: DRM digital radio: DRM30 below 30 MHz, DRM+ in the VHF bands
• HD Radio: HD Radio: the digital part of hybrid FM and AM stations
• CDR: CDR: China's digital radio in the FM band
• AM broadcast: AM broadcast on medium wave and shortwave, in the general receiver with MW and SW presets

Aviation

• ADS-B: ADS-B aircraft position and identity reports
• Mode S uplink: Mode S uplink: interrogators, rotation periods, aircraft asked for registers, TCAS coordination
• ACARS: ACARS: short messages between aircraft and the ground
• VDL2: VDL Mode 2: ACARS and ATN messages between aircraft and ground stations, positions on a map
• VDL4: VDL Mode 4: synchronization and DLS bursts, CPR positions when decoded in the clear
• HFDL: HFDL: ACARS, squitters and positions of aircraft over oceans and remote areas, on HF
• Airband: Airband: tower, ground and ATIS voice on several channels at once
• VOR: VOR: your bearing from a navigation beacon, its Morse identification and voice
• ILS: ILS: left / right of the runway centreline and above / below the glide path
• NDB: NDB: the Morse identification of a long-wave navigation beacon
• Drone Remote ID: Drone Remote ID: drones and their operators, from the identification every drone must broadcast
• UAT: UAT 978 MHz: ADS-B, FIS-B weather and TIS-B relay
• FLARM: FLARM aircraft: gliders and light aircraft on 868 MHz
• DJI drones: DJI drones: OcuSync / Lightbridge-like signals by shape, and DroneID packets decoded

Maritime

• AIS: AIS: ship positions and identities
• VDES: VDES: ASM frames decoded, VDE-TER bursts logged and classified
• NAVTEX: NAVTEX: safety messages for ships on 518 and 490 kHz
• DSC: DSC: digital selective calling between ships and coast stations
• Weather fax: Weather fax: HF radiofax charts for ships

Satellite & navigation

• GNSS: GNSS: satellite tracking and position fix
• Inmarsat-C: Inmarsat-C: satellite safety and news broadcasts, needs an L-band antenna
• Inmarsat Aero: Inmarsat Aero: aircraft satellite data link, needs an L-band antenna
• Iridium: Iridium satellite downlink bursts, needs an L-band antenna
• Meteor-M LRPT: Meteor-M LRPT: weather satellite pictures as the satellite passes
• GOES HRIT: GOES HRIT: geostationary weather images and EMWIN text (needs a dish and an LNA)
• Elektro-L: Elektro-L: geostationary weather images (HRIT / LRIT) and GGAK (needs a dish and an LNA)
• Orbcomm: Orbcomm satellite downlinks: satellite IDs, positions, channel assignments, messages
• QO-100: QO-100: the amateur satellite's transponders with exact frequencies from its beacons
• CubeSat telemetry: CubeSat telemetry: frames from amateur satellites, named and dumped
• Globalstar: Globalstar: channel activity and Doppler (content is not decoded)
• COSPAS-SARSAT 406 MHz: 406 MHz distress beacons (EPIRB, ELT, PLB), receive only

Two-way radio

• DMR: DMR (Digital Mobile Radio), two-slot TDMA
• NXDN: NXDN: unit IDs, talkgroups, status and short data, site information
• P25: P25: talkgroups, unit IDs, trunking sites and channels, voice grants (receive only; encrypted calls are only reported)
• dPMR / PMR446: dPMR: own and called IDs, colour codes, status and short messages, PMR446 channel scan
• TETRA: TETRA: the public broadcast information of TETRA cells
• TETRAPOL: TETRAPOL: control-channel system information (receive only)
• Tone decoders (CTCSS, DCS, DTMF, selcall): signalling tones and codes in narrow-FM audio

Cellular & rail

• Cell towers: Cell towers: the public broadcast information of LTE cells
• 5G NR cells: 5G NR cells: the public broadcast of NR cells (PSS / SSS / PBCH, MIB)
• NB-IoT cells: NB-IoT cells: the public broadcast information of narrowband IoT carriers (receive only)
• GSM-R: GSM-R: the public broadcast information of railway GSM cells
• LBJ: LBJ: railway train warning broadcasts (821 MHz)

Pagers

• POCSAG: POCSAG pager messages
• FLEX: FLEX pager messages
• Multitone Paging: Multitone Paging: tone and FFSK pagers for hospitals and sites, detector only (receive only)

IoT & sensors

• ISM sensors: ISM sensors: weather stations, TPMS, remotes and meters around you (the rtl_433 idea)
• LoRaWAN: LoRaWAN: IoT devices around you, from the headers every gateway receives
• Meshtastic: Meshtastic: LoRa mesh network nodes and messages
• MeshCore: MeshCore: LoRa mesh network nodes and messages
• Bluetooth LE: Bluetooth LE: the advertising packets devices broadcast openly
• Zigbee / 802.15.4: Zigbee / 802.15.4: networks and devices from the headers every sniffer sees (receive only, no decryption; needs a fast 2.4 GHz
• Wi-Fi HaLow (802.11ah): Wi-Fi HaLow / 802.11ah: the long-range sub-GHz networks around you from their beacons (receive only, no decryption)
• ANT+ sensors: ANT+ sensors on 2457 MHz (and other ANT networks on their own channel): heart rate straps and watches, bike speed, cadence and
• DECT cordless phones: DECT cordless phones and base stations on the ten carriers 1881.792 - 1897.344 MHz (Europe; 1.152 Mbit/s GFSK, 10 ms frames of
• Wi-SUN FAN: Wi-SUN FAN: smart meter and street light mesh networks, nodes and links (receive only, no decryption)
• LoRa (raw): LoRa (raw): point-to-point LoRa frames as hex and text, SF / bandwidth set or searched (receive only, no decryption)
• Wi-Fi networks: Wi-Fi networks: the access points around you, from the beacons they broadcast
• Wireless M-Bus (meters): utility meters on 868 and 169 MHz
• Z-Wave: Z-Wave G.9959 frame monitor (R1, R2, R3)

Weather & science

• HRPT / AHRPT: HRPT / AHRPT: MetOp AVHRR pictures at 1.7 GHz (needs a dish and a fast radio)
• NOAA Weather Radio SAME: NOAA Weather Radio SAME: weather and emergency alerts, decoded and explained (receive only)
• Radiosonde: Radiosonde weather balloons: position, altitude and weather data
• Time signals: Time signals: the time stations and your computer clock against them
• Ionospheric sounders: Ionospheric sounders: chirp ionosondes and the ionogram they give
• Radio astronomy: Radio astronomy: the hydrogen line of the Milky Way
• e-Czas (225 kHz, Poland): Poland's official time on 225 kHz long wave
• Meteor scatter: ping detector for GRAVES and other CW beacons

Amateur: digital

• FT8: FT8: weak-signal amateur contacts
• FT4: FT4: fast weak-signal amateur contacts
• FT2: FT2: the fastest of the FT modes
• WSPR: WSPR: weak-signal propagation reports
• JT65: JT65: weak-signal amateur contacts and EME
• JT9: JT9: narrow weak-signal amateur contacts
• Q65: Q65: weak-signal, EME and scatter contacts
• FST4: FST4: slow weak-signal contacts and FST4W beacons
• MSK144: MSK144: meteor scatter bursts
• PSK31: PSK31: keyboard chat, every signal in the passband
• JS8Call: JS8Call: weak-signal messages, heartbeats and relays
• RTTY: RTTY: radio teletype text
• CW: CW: Morse code from every signal in the window, speed and callsigns
• SSTV: SSTV: slow-scan television pictures
• HamDRM: HamDRM: digital SSTV pictures (EasyPal, QSSTV DRM)
• Olivia: Olivia: text that gets through noise
• Contestia: Contestia: Olivia's faster cousin
• MFSK: MFSK: error-corrected keyboard text
• THOR: THOR: robust keyboard text
• DominoEX: DominoEX: keyboard text that ignores tuning
• Hellschreiber: Hell: text drawn as a picture
• MT63: MT63 keyboard mode, 500, 1000 and 2000 Hz

Amateur: voice & packet

• FreeDV: FreeDV: open digital voice on HF
• M17: M17: open digital voice, text messages and positions on VHF / UHF
• D-STAR: D-STAR: callsigns, repeaters, messages and D-PRS positions on VHF / UHF
• APRS (AFSK): APRS and AX.25 packet radio, 1200 bd AFSK on VHF (not LoRa APRS)
• LoRa APRS: LoRa APRS: APRS stations over LoRa on 433 MHz
• MeshCom: MeshCom: amateur LoRa mesh messages and positions on 433 MHz

HF utility

• Datawell Buoy HF Link: Datawell Buoy HF Link: wave heights, periods and spectra from wave buoys on HF (receive only)
• CODAR / HF ocean radar: CODAR / HF ocean radar: the coastal radar chirps on the HF bands (receive only)
• HF ALE: HF ALE: who calls whom, soundings and AMD messages
• HF beacons: HF beacons: what is open from here, band by band

General & tools

• Signal workbench: Signal workbench: analyse, demodulate and read any recording
• General receiver: General receiver: NFM, WFM, AM, USB, LSB and CW anywhere
• Spectrum explorer: Spectrum explorer: look, measure and sweep
• Spectrum analyser: Spectrum analyser: fast wide sweeps with markers and band labels

Plugins

• Plugins: the plugin manager; modes added by plugins appear in the list under their own names

See also the Legal notes, Voice codecs and Supported radios.