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Technical glossary
| Abbreviation | Description |
|---|---|
| AMR | Automatic Meter Reading |
| dBuV/m | dB referred to one microvolt per meter |
| dBRN | decibels above reference noise |
| DBS | direct broadcast by satellite |
| dBV | decibels referred to 1 Volt |
| dBW | decibels referred to 1 Watt |
| dBx | decibels above the reference coupling |
| DC | direct current |
| DCI | direct current injection |
| DFT | discrete Fourier transform |
| DIN | Deutsches Institute fur Normung (German Standards Organzation) |
| div | divergence |
| dipole | Near omni-directional antenna. Usually fed from the base with gain approximately of 0 dB. Also called base loaded dipole where an impedance matching coil is included in the base to give 50 Ohm match in the absence of a ground plane. |
| DOC | Department of Communications (Canada) |
| DOD | Department of Defence (USA) |
| DOT | Department of Transportation |
| DRA | Defence Research Agency (UK) |
| DSB | double sideband |
| DSSC | double sideband suppressed carrier (modulation) |
| DTC | dual TEM cell |
| DTSC | digital termination shielded chamber |
| DUT | device under test |
| EBU | European Broadcasting Union |
| EC | Engineering Council |
| EC | European Communities |
| ECAC | Electromagnetic Analysis Centre |
| ECC | Electronic Calibration Centre (NBS) |
| ECE | Economic Commission for Europe (CEE Geneva) |
| ECMA | Electronic Computer Manufactures Association |
| ECMWF | European Centre for Medium-Range Weather Forecasting |
| ECP | electromagnetic compatibility program |
| EED | electro explosive device |
| EED | electromagnetic energy density |
| El | electromagnetic environmental effects |
| EEM | electric equipment monitoring |
| EEPA | Electromagnetic Energy Policy Alliance |
| EFT | electrical fast transients |
| EGA | enhanced graphics array (640X320 pixels) |
| EIA | Electronic Industries Association |
| EIAJ | Electronic Industries Association of Japan |
| EIRP | equivalent isotropically radiated power |
| EITB | Engineering Industry Training Board |
| EM | electromagnetic |
| EMC | electromagnetic compatibility |
| EMC | electromagnetically coupled |
| EMC | electromagnetic coupling |
| EMCAB | Electromagnetic Compatibility Advisory Board |
| EMCOM | emission control |
| EMCP | electromagnetic compatibility program |
| EMCS | electromagnetic compatibility standardization (program) |
| EMCTP | electromagnetic compatibility test plan |
| EME | electromagnetic energy |
| EME | electromagnetic environmental effects |
| EMETF | electromagnetic environmental test facility |
| EMF | electromotive force |
| EMH | electromagnetic health |
| EMI | electromagnetic interference |
| EMICP | electromagnetic interference control plan |
| EMINT | electromagnetic intelligence |
| EMP | electromagnetic pulse (radiation) |
| EMR | electromagnetic radiation |
| EMSEC | emanation security (TEMPEST) |
| EMU | electromagnetic unit |
| EMV | Gesetz (German EMC law) |
| EN | Europaische Norm (European standard) |
| EOTC | European Organisation for Testing and Certification |
| EPA | Environment Protection Agency |
| ERP | effective radiated power |
| ERP | equivalent radiated power |
| ERTZ | equipment radiation TEMPEST zone |
| ESA | electrostatic attraction |
| ESD | electrostatic discharge |
| ESDS | electrostatic discharge sensitive |
| ESTLA | electrically short-tuned loop antenna |
| ETL | Electro technical Laboratory (Japan) |
| ETSI | European Telecommunications Standards Institute |
| EUT | equipment under test |
| FAA | Federal Aviation Administration (USA) |
| F/B | front-to-back ratio |
| FC | ferrite core |
| FCC | Federal Communications Commission (USA) |
| FEA | Federal Energy Administration |
| FEANI | Federation European d?Associations Nationales d?Ingenieurs (France) |
| FERROD | ferrite-rod-antenna |
| FFT | fast Fourier transform |
| FG | function generator |
| FI | frequency independent |
| FM | frequency modulation |
| FMCW | frequency modulated continuous wave |
| FMCW | frequency modulated carrier wave |
| FOB | Field Operations Bureau (FCC) |
| FOL | fibre optic link |
| FS | field strength |
| FSM | field strength meter |
| FT | Fourier transform |
| FTC | Federal Trade Commission |
| FTZ | Fernmelde Technischer Zentralamt (Germany |
| GSM | group special mobile |
| G/T | antenna gain-to-noise temperature |
| GTD | geometrical theory of diffraction |
| HBM | human body model (ESD) |
| HCP | horizontal coupling plane (for ESD testing) |
| HEMP | high-altitude electromagnetic pulse |
| HERF | hazards of electromagnetic radiation to flight |
| HERF | hazards of electromagnetic radiation to fuel |
| HERO | hazards of electromagnetic radiation to ordnance |
| HERP | hazards of electromagnetic radiation to personnel |
| HIRF | high-intensity radiated fields |
| HP | horizontal polarization |
| HPBW | half-power banwidth |
| HPM | high-power microwaves |
| HIS | hardness surveillance illuminator |
| IAC | Industry Advisory Committee |
| IBS | Institute for Basic Standards |
| ICAO | International Civil Aviation Organization |
| ICP | inherently conductive polymers |
| IDP | inherently dissipative polymers |
| IEC | International Electro technical Commission |
| IEE | Institution of Electrical Engineers (UK) |
| IEEE | Institute of Electrical and Electronics Engineers (USA) |
| IEEJ | Institute of Electrical and Engineers (Japan) |
| IEPS | International Electronics Packaging Society |
| IES | Institute of Environmental Sciences |
| IICIT | International Institute of Connector and Interconnection Technology |
| INIRC | International Non-ionising Radiation Committee |
| IPC | Institute for Interconnecting and Packaging Electronics Circuits |
| IRPA | International Radiation Protection Association |
| IRR | International Radio Regulations |
| IRT | Institute fur Rundfunktecktecknik GmHB (Germany) |
| ISDN | integrated services digital network |
| ISHM | International Society for Hybrid Microelectronics |
| ISM | industrial scientific and medical |
| ISO | International Standards Organization |
| ITE | information technology equipment |
| ITE | Institute of Telecommunications Engineers |
| ITEM | Interference Technology Engineers? Master |
| ITU | International Telecommunication Union (UNO) |
| JEDEC | Joint Electron Device Engineering Council |
| kWh | kilowatt-hour |
| LA | lighting arrestor |
| LASSY | Licence Administration Support System |
| LCR | inductance-capacitance ? resistance (network) |
| LE | antenna effective length (for electric field antennas) |
| LEM | antenna effective length (for magnetic field antennas) |
| LEMP | electromagnetic pulse generated by a nearby lightning strike |
| LHCP | left-hand circular polarization or circularly polarized |
| LISN | line impedance stabilization network |
| LLD | low-level detector |
| LLSC | low-level sweep coupling |
| In | Naperian or natural logarithm (to the base e) |
| log | logarithm (usually to base 10) |
| LORAN | long-range navigation |
| LORAP | long range aerial photography |
| LPDA | log-periodic dipole antennas or array |
| LPDA | log-periodic dipole antennas or array |
| LSB | lower-sideband |
| LSN | line stabilization network |
| LUF | lowest usable frequency |
| MAGGI | Million Ampere Generator (Aldermaston, UK) |
| Maser | microwave amplification by stimulated emission of radiation |
| MCS | Mobile Communications Systems (IEEE vehicular Technology Technical Committee) |
| MCW | modulated continuous wave |
| MDS | minimum detectable (for discernible) signal |
| MIC | minimum ignition current |
| MIC | mutual interference chart |
| MIL | Defence Logistics Agency (USA) |
| MIL-I | Military specification on interference |
| MIL-STD | Military standard (book) |
| mil | One-thousandth of an inch |
| MKS | Meter-kilogram-second |
| MM | machine model (ESD) |
| MMB | Mass Media Bureau (FCC) |
| MMF | magnetomotive force |
| Mod | Ministry of Defence (UK) |
| MOF | Maximum operating frequency |
| MP-4 | an FCC measurement procedure |
| MPE | maximum permissible exposure |
| MPL | maximum permissible level |
| MPW | modified plane wave |
| MS | Military standard sheet, prefix to numbered series issued by DOD (USA) |
| MSC | mode stirred cavity |
| MTF | modulation transfer function |
| MUB | maximum usable bandwidth |
| MUF | maximum usable frequency |
| MUT | Material under test |
| NAB | National Association of Broadcasters |
| NACSEM | National COMSEC/EMSEC Information Memorandum (TEMPEST) |
| NACSI | National COMSEC Instruction (TEMPEST) |
| NACSIM | National COMSEC Instruction Memorandum (TEMPEST) |
| NAMAS | National Measurement Accreditation Service (UK) |
| NARTE | National Association of Radio and Telecommunications Engineers |
| NASA | National Aeronautics Space Administration |
| NATA | North American Telecommunications Association |
| NATLAS | National testing Laboratory Accreditation Scheme (UK) |
| NBC | narrowband conducted |
| NBC | nuclear biological and chemical |
| NBS | National Bureau of Standards (USA) now NIST |
| NBSFS | NBS frequency standard |
| NEC | numerical electromagnetics code |
| NEMA | National Electrical Manufacturer?s Association |
| NEMP | nuclear electromagnetic pulse |
| NEPA | National Environment Policy Act |
| NFP | near-field probe |
| NFPA | National Fire Protection Association |
| NIH | National Institute of Health |
| NIST | National Institute of Standards and Technology (USA) |
| NMR | normal-mode rejection |
| NPL | National Physical Laboratory (UK) |
| NRC | National Research Council |
| NRC | Nuclear Regulatory Commission |
| NRL | National Research Laboratory (USA) |
| NRPB | National Radiological Protection Board (UK) |
| NRTL | nationally recognized testing laboratory |
| NSA | normalized site attenuation |
| NSA | National Security Agency |
| NTG | Nachrichtentechnische Gesellschaft (German Communications Society) |
| NTIA | National Telecommunications and Information Administration (US Department of Commerce) |
| NTISSI | National Telecommunications and Information systems Security Instruction |
| NTP | normal temperature and pressure |
| TZ | Nachrichtechnische Zeitschrift (Germany) |
| NTSC | National Television System Committee (US) |
| NVLAP | National Voluntary Laboratory Accreditation Program |
| OATS | open area test site |
| OBR | optical bar code reader |
| oe | oersted (ampere per meter) |
| OEM | original equipment manufacturer |
| OET | Office of Engineering and Technology (FCC) |
| OSHA | Occupational Health and Safety Administration |
| OST | Office of Science and Technology |
| P-P | peak to peak |
| PBS | Public Broadcasting Service |
| PCZ | physical control zone (TEMPEST) |
| pd | potential difference |
| PDS | power density spectra |
| PF | power factor |
| PLC | power-line carrier |
| PM | phase modulation |
| PM | pulse modulation |
| PadB | perceived noise level expressed in decibels |
| POE | point of entry (TEMPEST) |
| PRB | Private Radio Bureau (FCC) |
| PRF | pulse repetition frequency |
| PRI | pulse repetition interval |
| PRR | pulse repetition rate |
| PSD | Power spectral density |
| PSOPH | psophometric weighting |
| PTFE | polytetrafluoroethylene |
| PTM | pulse time modulation |
| PW | plane wave |
| PWS | plane wave spectrum |
| QP | quasi peak |
| QPA | quasi-peak adapter |
| QRM | manmade interference |
| R-AMR | Radio Automatic Meter Reading |
| RAC | Representative Advisory Committee |
| radar | radio assisted detection and ranging |
| RADFAC | radiation facility |
| RADHAZ | radiation hazards |
| RADIMT | radiation intelligence |
| radome | radar dome |
| RAE | Royal Aeronautical Establishment (now DRA) |
| RAM | radar absorbing material |
| RBE | radiation biological effectiveness |
| RD | radiation detector |
| RE | radiated emission |
| REC | radiant energy conversion |
| REG | radio frequency environment generator |
| REG | radar environment generator |
| RF | radio frequency |
| RFA | recticulated radio absorber |
| RFC | radio-frequency compatibility program |
| RFI | Radio-frequency interference |
| RFPG | radio frequency protection guidelines |
| RH | radiological health |
| RHE | radiation hazard effects |
| RI | radio interference |
| RM | radio monitoring |
| RMS | radiation monitoring system |
| RMS | root mean square |
| RRSWG | random repetitive square pulse generator |
| RS | radiated susceptibility |
| RTcomTM | Radio-Tech Communications: Trade Mark of Radio-Tech Limited |
| RTL | Radio-Tech Limited |
| RSS | root sum square |
| RTMA | Radio Television Manufacturers? Association |
| SA | spectrum analyzer |
| SAE | Society of Automotive Engineers |
| SAMPE | Society for the Advancement of Material and Process Engineering |
| SAR | specific absorption rate |
| SB | sideband |
| s/c | signal-to-clutter ratio |
| SCSI | Small computer system interface |
| SE | shielding of screening effectiveness |
| SELDS | shielded enclosure leak detection system |
| SEV | Schweizerische Elektrotechnischer Verein (Swiss Electrotechnical Association |
| SI | Systeme Internationale d?Unites (International system of units) |
| SIR | signal-to-interference radio |
| SMC | stirred mode cavity |
| SNI | signal-to-noise improvement |
| SNR | signal-to-noise ratio |
| SPEHS | Single-point excitation for hardness surveillance |
| SPG | Single-point ground |
| SS | Swedish Standard |
| SSB | single sideband |
| SSBSC | single-sideband suppressed carrier |
| SSSC | single-switched suppressed carrier |
| SSPM | single-sideband pulse modulation |
| stat | electrostatic units in CGS system (prefix) |
| SUT | site under test |
| SWR | standing wave ratio |
| TE | transverse electric (field) |
| TEM | transverse electromagnetic |
| TEMPEST | U S government radiated emissions security program |
| TM | Transverse magnetic (field) |
| TSB | twin sideband |
| TSI | threshold signal-to interference ratio |
| TVAR | TEMPEST Vulnerability Assessment Request |
| TVS | transient voltage suppressor |
| TWSB | twin sideband |
| TWT | travelling-wave tube |
| TWTA | travelling-wave tube amplifier |
| UL | Underwriter?s Laboratory |
| UNO | United Nations Organization |
| UPS | uninterruptible power supply |
| USB | upper sideband |
| UUT | unit under test |
| UWB | ultra wideband |
| VCCI | Voluntary Control Commission for Interference (Japan) |
| VCP | vertical coupling plane (for ESD testing) |
| VDE | Verband Deutsche Electrotechniker - Society of German Electrical Engineers |
| Vfg | Verfugung (FTZ regulations that affect EDP equipment) |
| VGA | video graphics array (640 X 480 pixels) |
| V/Hz | Volts per hertz |
| VP | Vertical polarization |
| VSWR | voltage standing wave ratio |
| WARC | World Administrative Radio Conference |
| WG | waveguide |
| Wave length | The distance occupied by a wave in a particular medium. Nominally 3x108 divided by frequency. Answer in meters. |
| WG | Working Group (CISPR) |
| XPD | cross polar discrimination |
| XT | cross talk |
| yagi | Directional antenna with central boom and side directors, collectors and reflector. Has gain > 0db. Typically 6 to 20dB |
| 1/4 wave dipole | A form of simple dipole which is a nominal 1/4 wave in length. Usually terminated in a M6 thread, BNC, TNC or N-Type connector. These antenna are available from Radio-Tech Limited covering most SRD bands. |
| 5/8 wave dipole | A form of simple dipole which is a nominal 5/6 wave in length. Usually terminated in a M6 thread, BNC, TNC or N-Type connector. These antenna are have a base loading coil to make them ground plane independent. Available from Radio-Tech Limited covering most SRD bands. |
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Radio-Tech Limited, supply radio telemetry, remote metering, remote monitoring, wireless technology, radio modem, EPOS, POS, remote meter reading, Automatic Meter Reading Automatic Meter ReadingAMR, radio Automatic Meter Reading AMR, Intrinsically safe RTU, radio modems, GSM Cellular modem, GSM modem, radio data logger, GPRS, GPRS modems, GPRS modem, meter reading, data concentrator, nurse call, POCSAG pagers, page switches and other RF solutions world wide. We currently have products approved for operation on MPT1340, MPT1341, MPT1328, MPT1329, MPT1411, EN 300 220, EST 300 220, ETS 300 683, FCC-part-90, FCC-part-15, Australia standards, AS and the new R&TTE directive. We manufacture a range of professional radio modems called the rtcom. These include the Global which is approved to ETS 300 220, Australia Standards, FCC Part-90 and MPT1329. The other modems include the Universal which is approved to MPT 1340 and ETS 300 220. All products are EMC Class-1 certified to ETS-300-683. For long range, radio modem, radio communication links we have the Outback. This The Outback is available as both modems and telemetry systems. These modems are ideal for scanning telemetry and SCADA applications and are 100% MODBUS transparent.
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Radio-Tech Ltd.
U1 & U2
The London Road Campus
London Road
Harlow
Essex
CM17 9NA
United Kingdom
Phone: +44 (0)1279 635 849
Fax: +44 (0)1279 442 261
U1 & U2
The London Road Campus
London Road
Harlow
Essex
CM17 9NA
United Kingdom
Phone: +44 (0)1279 635 849
Fax: +44 (0)1279 442 261