Radio related abbreviations
| Abbr. | Meaning |
|---|
| A | Ampere |
| AC | Alternating Current |
| ACELP | Adaptice Code Excited Linear Prediction |
| AF | Audio Frequency |
| AFC | Automatic Frequency Control |
| AFSK | Audio Frequency Shift Keying |
| AGC | Automatic Gain Control |
| AIS | Automatic Identification System |
| ALE | Automatic Link Establishment |
| AM | Amplitude Modulation |
| AMPS | Advanced Mobile Phone System |
| AMTOR | AMateur Teleprinting Over Radio |
| APRS | Automatic Packet/Position reporting System |
| APT | Automatic Picture Transmission |
| ARISS | Amateur Radio on the International Space Station |
| ARQ | Automatic Repeat reQuest |
| ARRL | American Radio Relay League |
| ASK | Amplitude Shift Keying |
| ASTRID | The police/fire/ambulance TETRA network in Belgium |
| ATT | Attenuator |
| ATV | Amateur TeleVision |
| BC | BroadCasting |
| BER | Bit Error Rate |
| BNC | Bayonet Neill Concelman (A type of RF connector) |
| BOSNET | The police/fire/ambulance TETRA network in Germany |
| BW | Band Width |
| C2000 | The police/fire/ambulance TETRA network in the Netherlands |
| CME | Coronal Mass Ejection |
| COFDM | Coded Orthogonal Frequency Division Multiplex |
| CPFSK | Continuous Phase Frequency Shift Keying |
| CPM | Continuous Phase Modulation |
| CTCSS | Continuous Tone Coded Squelch System (Same as PL) |
| CW | Continuous Wave |
| D-STAR | Digital Smart Technologies for Amateur Radio |
| DAB | Digital Audio Broadcasting |
| DAB+ | Digital Audio Broadcasting Plus (Newer and more efficient compression) |
| DC | Direct Current |
| DCS | Digital Coded Squelch |
| DMO | Direct Mode Operation (TETRA) |
| DMR | Digital Mobile Radio |
| DPMR | Digital Personal Mobile Radio |
| DQPSK | Differential Quadrature Phase Shift Keying |
| DRM | Digital Radio Mondiale |
| DSB | Double Side Band |
| DSC | Digital Selective Calling |
| DSSS | Direct Sequence Spread Spectrum |
| DTMF | Dual Tone Multi Frequency |
| DW | Dual Watch |
| EHF | Extremely High Frequency (30 - 300 GHz) |
| EMC | ElectroMagnetic Compatibility |
| EME | Earth-Moon-Earth (Moonbounce) |
| EMI | ElectroMagnetic Interference |
| EPIRB | Emergency Position Indicating Radio Beacon |
| ERC | European Radiocommunications Committee |
| ETSI | European Telecommunications Standards Institute |
| F | Farad (Capacitance) |
| FCC | Federal Communications Commission |
| FEC | Forward Error Correction |
| FET | Field Effect Transistor |
| FHSS | Frequency Hopping Spread Spectrum |
| FM | Frequency Modulation |
| FM-N | Frequency Modulation Narrow (Same as NFM) |
| FM-W | Frequency Modulation Wide (Same as WFM) |
| FRS | Family Radio Service |
| FSK | Frequency Shift Keying |
| FSTV | Fast Scan TeleVision (See also ATV) |
| GFW | Global Frequency Warning |
| GHz | GigaHertz (1 GHz = 1000 MHz) |
| GMDSS | Global Marine Distress and Safety System |
| GMRS | General Mobile Radio Service |
| GMSK | Gaussian Minimum Shift Keying |
| GP | Ground Plane |
| GPS | Global Positioning System |
| GSM | Global System for Mobile communication |
| H | Henry (Inductance) |
| HALT | Highly AcceLerated Testing |
| HF | High Frequency (3 - 30 MHz) |
| HRPT | High Resolution Picture Transmission |
| HT | Handie Talkie (Portable transceiver) |
| Hz | Hertz |
| IARU | International Amateur Radio Union |
| IF | Intermediate Frequency |
| ISS | International Space Station |
| ITU | International Telecommunication Union |
| JFET | Junction gate Field Effect Transistor |
| KDR | KortDistansRadio (Swedish) = Short distance radio) |
| KHz | KiloHertz (1 KHz = 1000 Hz) |
| LDMOS | Laterally Diffused Metal Oxide Semiconductor |
| LEO | Low Earth Orbit |
| LF | Low Frequency (30 - 300 KHz) |
| LPAM | Low Power AM (Max 1 W in the UK) |
| LPD | Low Power Device |
| LSB | Lower Side Band |
| LUF | Lowest Usable Frequency |
| LVD | Low Voltage Directive |
| LW | LongWave |
| MCW | Modulated Continuous Wave |
| MDS | Minimum Discernable Signal |
| MF | Medium Frequency (300 - 3000 KHz) |
| MF | Mellanfekvens (Swedish) = Intermediate Frequency |
| MFSK | Multiple Frequency Shift Keying |
| MHz | MegaHertz (1 MHz = 1000 KHz) |
| MMI | Man-Machine Interface |
| MOSFET | Metal Oxide Semiconductor Field Effect Transistor |
| MSK | Minimum Shift Keying |
| MUF | Maximum Usable Frequency |
| MURS | Multi Use Radio System |
| MW | Medium Wave |
| NAVTEX | NAVigational TEleX |
| NB | Noise Blanker |
| NFM | Narrow Frequency Modulation (Ambiguous, usually a BW of approximately 7.5 or 15 KHz, depending
on manufacturer, but in modern terms, max 7.5 KHz (+/-2.5 KHz deviation) would be more correct) |
| NR | Noise Reduction |
| NVIS | Near Vertical Incidence Skywave |
| OFDM | Orthogonal Frequency Division Multiplexing |
| PAM | Pulse Amplitude Modulation |
| PBT | Pass Band Tuning |
| PCM | Pulse Code Modulation |
| PL | Private Line (Same as CTCSS) |
| PLB | Personal Locating Beacon |
| PLL | Phase Locked Loop |
| PM | Phase Modulation |
| PMR | Personal Mobile Radio |
| PPM | Pulse Position Modulation |
| PSK | Phase Shift Keying |
| PTS | Post & TeleStyrelsen (Swedish Post & Telecom Agency) |
| PTT | Push To Talk |
| QAM | Quadrature Amplitude Modulation |
| QPSK | Quad Phase Shift Keying |
| RADAR | RAdio Detection And Ranging |
| RAKEL | RAdioKommunikation för Effektiv Ledning. The police/fire/ambulance TETRA network in Sweden |
| RDF | Radio Direction Finding |
| RF | Radio Frequency |
| RFID | Radio Frequency IDentification |
| RIT | Receiver Incremental Tuning |
| RMS | Root Mean Square |
| RoHS | Restriction of certain Hazardous Substances |
| RSGB | Radio Society of Great Britain |
| R&TTE | Radio & Telecommunications Terminal Equipment |
| RTTY | Radio TeleTYpe |
| RX | Receive/Receiver |
| SAR | Search And Rescue |
| SART | Search And Rescue Transponder |
| SDR | Software Defined Radio |
| SHF | Super High Frequency (3 - 30 GHz) |
| SINE | The police/fire/ambulance TETRA network in Denmark |
| SIRESP | The police/fire/ambulance TETRA network in Portugal |
| SITOR | SImplex Telex Over Radio |
| SK | Silent Key |
| SRBR | Short Range Business Radio |
| SRD | Short Range Device |
| SSB | Single Side Band |
| SSR | Secondary Surveillance Radar |
| SSTV | Slow Scan TeleVision |
| STS | Special Telecommunications Service. The police/fire/ambulance TETRA network in Romania |
| SW | Shortwave |
| SwMI | Switching and Management Infrastructure |
| TACS | Total Access Communication System. A variant of AMPS |
| TBS | TETRA Base Station |
| TEA | TETRA Encryption Algorithm |
| TEP | TransEquatorial Propagation |
| TETRA | TErrestial Trunked RAdio |
| TETRON | The police/fire/ambulance TETRA network in Austria |
| THz | TeraHertz (1 THz = 1000 GHz) |
| TMO | Trunked Mode Operation (TETRA) |
| TNC | Terminal Node Controller (Basically a packet modem with advanced functions) |
| TNC | Threaded Neill Concelman (A type of RF connector) |
| TS | Tuning Steps |
| TV | TeleVision |
| TX | Transmit/Transmitter |
| UHF | Ultra High Frequency (300 - 3000 MHz) |
| UMTS | Universal Mobile Telephone System |
| USB | Upper Side Band |
| V | Volt |
| VDMOS | Vertical Laterally Double-diffused Metal Oxide Semiconductor |
| VFO | Variable Frequency Oscillator |
| VHF | Very High Frequency (30 - 300 MHz) |
| VIRVE | The police/fire/ambulance TETRA network in Finland |
| VLF | Very Low Frequency (3 - 30 KHz) |
| VMSK | Very Minimum Shift Keying |
| VoIP | Voice over Internet Protocol |
| VOX | Voice Operated switch / Voice Operated eXchange |
| VSB | Vestigal Side Band |
| WEEE | Waste Electrical and Electronic Directive |
| WFM | Wide Frequency Modulation (Normal broadcast FM quality, about 150-230 KHz BW) |
| WiRES-II | Wide-coverage InteRnet Enhancement System version 2 (A VoIP system introduced in 2002 by Yaesu) |
| XFC | Transmit Frequency Check |
| XIT | Transmitter Incremental Tuning |
| ZF | ZwischenFrequenz (German) = Intermediate frequency |
