Active/Common Signals

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Description[edit]

These are signals that have are active or have been active within the last 6-12 months. You have a very good chance of finding any one of these out on the airwaves.

Click the name of a signal to see more detailed information, possible decoding, and additional sound and waterfall samples

Color Legend
Inactive
(No longer in use)
Active
(Currently in active use)
Status
Unknown or Intermittent
Signal Name Description Frequency Mode Modulation Bandwidth Location Sample Audio Waterfall image
"OTH-SW" OTH Radar The PRC OTHOver The Horizon (very long range)-SW over the horizon radar MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMCW 40 kHzKiloHertz (kHz) 10^3 Hz — 80 kHzKiloHertz (kHz) 10^3 Hz China PRC OTH SW Over the horizon radar.png
'Ghadir' OTH Radar 'Ghadir', is an Iranian over the horizon radar, part of Iran's Sepehr Phased Radar System. 28 MHzMegaHertz (MHz) 10^6 Hz — 29.7 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation Pulse 60 kHzKiloHertz (kHz) 10^3 Hz — 1 MHzMegaHertz (MHz) 10^6 Hz Iran IranOTH.png
29B6 'Kontayner' OTH Radar 29B6, nicknamed 'Kontayner', is a Russian over the horizon radar. It is currently very active in Europe. 6.1 MHzMegaHertz (MHz) 10^6 Hz — 32 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMOP 3.5 kHzKiloHertz (kHz) 10^3 Hz — 28 kHzKiloHertz (kHz) 10^3 Hz Russia Kontainer.png
2G CDMA (IS-95) 2G CDMACode Division Multiple Access, also known as IS-95, is a cellular standard. 850 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation QPSKQuadrature Phase-Shift Keying (2 bits per symbol) 1.228 MHzMegaHertz (MHz) 10^6 Hz Is95 narrow.PNG
4G LTE Network Long Term Evolution Network. Also known as 4G LTE Data and Evolved Universal Terrestrial Radio Access (E-UTRA). Data service for wireless consumer devices. 700 MHzMegaHertz (MHz) 10^6 Hz — 2,200 MHzMegaHertz (MHz) 10^6 Hz RAW OFDMOrthogonal Frequency-Division Multiplexing, PSKPhase-Shift Keying, QAMQuadrature Amplitude Modulation MHzMegaHertz (MHz) 10^6 Hz — 20 MHzMegaHertz (MHz) 10^6 Hz Worldwide LTE Thumb.jpg
ALE-400 ALEAutomatic Link Establishment-400 is an amateur version of the 2G ALEAutomatic Link Establishment standard. It is adapted to the demands of amateur radio emergency traffic handling. 1.806 MHzMegaHertz (MHz) 10^6 Hz — 144.163 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide ALE-400.jpg
ARQ-E(E3) ARQAutomatic Repeat reQuestAutomatic Repeat Query-E, also known as ARQAutomatic Repeat reQuestAutomatic Repeat Query-1000 Duplex or ARQAutomatic Repeat reQuestAutomatic Repeat Query-1000D, is a synchronous full-duplex ARQAutomatic Repeat reQuestAutomatic Repeat Query system. ARQAutomatic Repeat reQuestAutomatic Repeat Query-E3 is a variant that uses a different alphabet encoding. Mainly used by French Military Forces. Stations commonly idled for hours on end. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 850 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide ARQE3192Bd.png
ASCII ASCII (also known as ITA5 or IRA) is an amateur radio telegraphy signal using the ITA-5 alphabet. MHzMegaHertz (MHz) 10^6 Hz — 450 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide ASCII.jpg
ATSC Broadcast Advanced Television Systems Committee Television. 8VSB Modulation 54 MHzMegaHertz (MHz) 10^6 Hz — 700 MHzMegaHertz (MHz) 10^6 Hz RAW 8VSB MHzMegaHertz (MHz) 10^6 Hz North America ATSCthmb.jpg
Aircraft Communications Addressing and Reporting System (ACARS) Short messages sent to and from aircraft 129 MHzMegaHertz (MHz) 10^6 Hz — 137 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.) kHzKiloHertz (kHz) 10^3 Hz Worldwide ACARS.jpg
Amplitude Modulation (AM) Long range commercial broadcast and international radio. Also used for aviation communications. 153 kHzKiloHertz (kHz) 10^3 Hz — 137 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation AMAmplitude Modulation 10 kHzKiloHertz (kHz) 10^3 Hz Worldwide AM radio.jpg
Autocab This is an example of the Autocab Media Data Terminals used by cab companies all over the world. 163.375 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz UK Autocab.jpg
Automated Train Control System (ATCS) Automated Train Control System (ATCS), specifically ATCS Spec. 200, is a standardized communication system for railroads designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders. 896 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 936 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). NFMNarrowband Frequency Modulation FSKFrequency-Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz North America Atcs.png
Automatic Dependent Surveillance-Broadcast (ADS-B) ADS-B is used by aircraft as an alternative to secondary radar. It broadcasts GPS position (latitude, longitude), pressure altitude, callsign, as well as track and ground speed separated into messages carrying 10 bytes of data each. 1,090 MHzMegaHertz (MHz) 10^6 Hz RAW PPMPulse Position Modulation 50 kHzKiloHertz (kHz) 10^3 Hz Worldwide ADS-B.jpg
Automatic Identification System (AIS) Automatic Identification System (AIS) is used by ships to broadcast position and vessel information. 161.975 MHzMegaHertz (MHz) 10^6 Hz — 162.025 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GMSKGaussian Minimum-Shift Keying 25 kHzKiloHertz (kHz) 10^3 Hz Worldwide AIS.jpg
Automatic Link Establishment (2G ALE) Automatic Link Establishment, 2G ALEAutomatic Link Establishment (Official designation MIL-STD-188-141A and/or MIL-STD-188-141B (Appendix A)) is the current standardized method of establishing connections between radio operators. Also known as FED-STD 1045, FED-STD 1049, and STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5066. 3.068 MHzMegaHertz (MHz) 10^6 Hz — 28.313 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide ALE2G.jpg
Automatic Link Establishment (3G ALE ARCS) 3G ALEAutomatic Link Establishment (ARCSAutomatic Radio Control System) is the next generation of ALEAutomatic Link Establishment (Designated by MIL-STD-188-141B (Appendix C)). Also known as STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4538, although MIL 188-141 does not provide Fast LSU. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide 3Gale.jpg
Automatic Link Set-up (ALIS) Automatic Link Set-up (ALIS) is an automatic link system used by Rohde & Schwarz modems. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 270 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide ALIS.jpg
Automatic Packet Reporting System (APRS) Packet system for real time data communications. Used by hams for location reporting, weather stations etc. 144.39 MHzMegaHertz (MHz) 10^6 Hz — 145.57 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation AFSKAudio Frequency-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz Worldwide APRS.jpg
Automatic Picture Transmission (APT) Automatic Picture Transmission (APT), also known as NOAA-GEOSAT, is an analog image transmission mode used to by the NOAA weather satellites and some Russian weather satellites to transmit satellite weather photos. 137 MHzMegaHertz (MHz) 10^6 Hz — 138 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation AMAmplitude Modulation 34 kHzKiloHertz (kHz) 10^3 Hz Worldwide APT NOAA.jpg
Automatic Transmitter Identification System (ATIS) ATIS systems are identification tags used by inland commercial waterway traffic on rivers in Europe. The FSKFrequency-Shift Keying burst is appended at the end of every voice transmission by the vessel operator. 30 MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FSKFrequency-Shift Keying 12 kHzKiloHertz (kHz) 10^3 Hz Europe ATIS voice samp.jpg
BPC BPC is the callsign of the Chinese low-frequency time broadcasting station, located near Shangqiu, Henan in China. 68.5 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) AMAmplitude Modulation HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). China BPC.jpg
BPM BPM is a time signal transmitted by the Chinese Academy of Sciences, broadcasting from CAS's National Time Service Center in Pucheng County, China. 2.5 MHzMegaHertz (MHz) 10^6 Hz — 15 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation AMAmplitude Modulation 3.5 kHzKiloHertz (kHz) 10^3 Hz China BPM.jpg
Binary Interchange of Information and Signaling (BIIS) BIIS (also known as BIIS 1200) is an ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards. protocol for a digital selective calling method with the added benefit of extended capability of transmitting data that exceeds what could be done with old 5-tone analog calling methods like CCIRComité Consultatif International pour la Radio (Predecessor of the ITU-R) and ZVEI. 35 MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Europe BIISthmb.jpg
CCIR 493-4 Selcall CCIRComité Consultatif International pour la Radio (Predecessor of the ITU-R) 493-4 Selcall, also known as HFHigh Frequency (3-30 MHz) Selcall, Australian Selcall, and Codan 8580 Selcall, is a Selcall standard developed in Australia for the HFHigh Frequency (3-30 MHz) band. Used by Amateur radio and Codan Modems. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide Ccir 493.jpg
CDMA2000 (3G physical layer) CDMACode Division Multiple Access is another standard for Cellular Devices with GSM being the first standard. 850 MHzMegaHertz (MHz) 10^6 Hz — 1,900 MHzMegaHertz (MHz) 10^6 Hz RAW QPSKQuadrature Phase-Shift Keying (2 bits per symbol) 1.23 MHzMegaHertz (MHz) 10^6 Hz Asia CDMA.jpg
CHU CHU is a time signal radio station operated by the Institute for National Measurement Standards of the National Research Council of Canada. 3.33 MHzMegaHertz (MHz) 10^6 Hz — 14.67 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying, OOKOn-Off Keying Modulation 2.25 kHzKiloHertz (kHz) 10^3 Hz Canada CHU.jpg
CIS MFSK-16 XPA2 Enigma Designation XPA2, also known as MFSKMultiple Frequency Shift-Keying-16, CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-14, and CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-16, is a 14-tone MFSKMultiple Frequency Shift-Keying signal said to have origin from Russian Intelligence and Foreign Ministry stations. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia XPA2.png
CIS MFSK-20 XPA Enigma Designation XPA, also known as MFSKMultiple Frequency Shift-Keying-20, CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-17, and CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-20, is a 17-tone MFSKMultiple Frequency Shift-Keying signal said to have origin from Russian Intelligence and Foreign Ministry stations. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia XPA10.png
CIS MFSK-68 New Russian MFSKMultiple Frequency Shift-Keying Modem that uses 68 MFSKMultiple Frequency Shift-Keying (5 tones at a time) as well as a 9000 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol) insert every second which spans 10 kHzKiloHertz (kHz) 10^3 Hz wide. This signal is often found attributed with CISCommonwealth of Independent States (CIS), the former Soviet Republic-3000, where CISCommonwealth of Independent States (CIS), the former Soviet Republic-3000 acts as the ALEAutomatic Link Establishment for this signal as well as CISCommonwealth of Independent States (CIS), the former Soviet Republic-128. 7.659 MHzMegaHertz (MHz) 10^6 Hz — 18.28 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying, PSKPhase-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz Russia CIS MFSK-68.jpg
CIS OFDM HDR Modem Russian OFDMOrthogonal Frequency-Division Multiplexing HDR (High Data Rate) Modem. Has three main modes: CISCommonwealth of Independent States (CIS), the former Soviet Republic-45, CISCommonwealth of Independent States (CIS), the former Soviet Republic-60, and CISCommonwealth of Independent States (CIS), the former Soviet Republic-93, corresponding to the number of OFDMOrthogonal Frequency-Division Multiplexing tones in the signal. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing 2.8 kHzKiloHertz (kHz) 10^3 Hz — 3 kHzKiloHertz (kHz) 10^3 Hz Russia CIS-45 33bd.jpg
CIS-112 CISCommonwealth of Independent States (CIS), the former Soviet Republic-112 OFDMOrthogonal Frequency-Division Multiplexing signal. Has a preamble of 7 Tones (not including carrier), then 56 tones before entering into the 112 tone data transmission. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing kHzKiloHertz (kHz) 10^3 Hz Russia CIS-112 pramb.jpg
CIS-12 CISCommonwealth of Independent States (CIS), the former Soviet Republic-12 (Also known as MS5, FIRE, AT-3004D, or AT-3104D) is a 12-tone PSKPhase-Shift Keying Russian military multi-channel modem. 7.026 MHzMegaHertz (MHz) 10^6 Hz — 14.6 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 3.1 kHzKiloHertz (kHz) 10^3 Hz Russia CIS-12.jpg
CIS-128 CISCommonwealth of Independent States (CIS), the former Soviet Republic-128 is an OFDMOrthogonal Frequency-Division Multiplexing mode that uses 128 channels, with one “off” channel in the center, so the signal is divided into two 64 channel parts. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing, QAMQuadrature Amplitude Modulation 3.1 kHzKiloHertz (kHz) 10^3 Hz — 6.1 kHzKiloHertz (kHz) 10^3 Hz Russia CIS-128.jpg
CIS-3000 CISCommonwealth of Independent States (CIS), the former Soviet Republic-3000 is an 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol) Data Modem protocol. It's source is traced to Russia. 3000 is for its 3000 BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. speed (maximum speed is technically 9000 bpsBits per second (bps)). MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 3.4 kHzKiloHertz (kHz) 10^3 Hz Russia CIS-3000.jpg
CIS-36-50 CISCommonwealth of Independent States (CIS), the former Soviet Republic-36-50, also known as BEE-36 and T-600, is an FSKFrequency-Shift Keying modem used by the Russian Navy. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 550 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia CIS-36-50.jpg
CIS-40.5 CISCommonwealth of Independent States (CIS), the former Soviet Republic-40.5 (Also known as T-206) is an FSKFrequency-Shift Keying signal used in Russian Military Communications Equipment. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 600 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia CIS-40.5.jpg
CIS-48 CISCommonwealth of Independent States (CIS), the former Soviet Republic-48 is an interesting data mode with a unique format. It uses a 4 DBPSK Preamble with a constant tone and changing OFDMOrthogonal Frequency-Division Multiplexing modes as it transmits data. Origin is suspected to be in Russia. 5.017 MHzMegaHertz (MHz) 10^6 Hz — 17.289 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying MHzMegaHertz (MHz) 10^6 Hz — 3 MHzMegaHertz (MHz) 10^6 Hz Russia CIS-48.jpg
CIS-50-50 CISCommonwealth of Independent States (CIS), the former Soviet Republic-50-50 is very similar to CISCommonwealth of Independent States (CIS), the former Soviet Republic-36-50. The main difference is in the available baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rates and frequency shifts used. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 150 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 630 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia CIS-50-50.jpg
CLOVER 2000 CLOVER 2000 is an upgrade to CLOVER-II, a digital data protocol developed by Ray Petit and HAL Communications. Sometimes referred to as XCLOVER or 8 Tone CLOVER. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, QAMQuadrature Amplitude Modulation kHzKiloHertz (kHz) 10^3 Hz Worldwide CLOVER-2000new.jpg
CLOVER 2500 CLOVER 2500 is a new upgrade to CLOVER-2000, adding 25% more speed to the CLOVER system. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, QAMQuadrature Amplitude Modulation 2.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide CLOVER-2500.jpg
CLOVER-II CLOVER-II is the advancement of CLOVER-I, with 4 tone pulses and a max data rate of 750 bpsBits per second (bps). Also known as Q-CLOVER and QUAD-CLOVER. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, QAMQuadrature Amplitude Modulation 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide CLOVER-II.jpg
CODAR CODAR (Coastal Ocean Dynamics Applications Radar) is used for near-surface ocean monitoring, such as waves and water current. 4.438 MHzMegaHertz (MHz) 10^6 Hz — 42.5 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) ILFM 50 kHzKiloHertz (kHz) 10^3 Hz Worldwide CODARthm.jpg
California Smart-Meter This is a signal from a Californian Electricity 'Smart Meter'. Each house is now fitted with one of these, and they are strong - typically 50 dBThe decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity, here the strength of a received signal. above the atmospheric noise level. 902 MHzMegaHertz (MHz) 10^6 Hz — 928 MHzMegaHertz (MHz) 10^6 Hz 15 kHzKiloHertz (kHz) 10^3 Hz United States Open-Way-Centron Smart-Meter Waterfallthmb.png
Chinese 4+4 Chinese 4+4, also known as 4+4 or PRC 4+4, is a multi-carrier transmission mode. It used by Chinese Diplomatic services with most traffic originating from Beijing, China. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.5 kHzKiloHertz (kHz) 10^3 Hz China CHN 4+4.jpg
Chinese Firedrake Jammer The Chinese Firedrake Jammer (also known as FireDragon) is a Commercial AMAmplitude Modulation Broadcast jamming signal that aims to jam specific radio stations in Asia from being received by listeners. It plays the chinese folk song "The Firedrake" to jam AMAmplitude Modulation radio stations. MHzMegaHertz (MHz) 10^6 Hz — 18 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation AMAmplitude Modulation 10 kHzKiloHertz (kHz) 10^3 Hz China CHN Jammer.png
Codan Data Modem Codan Data Modulation for Codan Data Modems. Has 3 distinct signals: Data, ALEAutomatic Link Establishment, and SELCAL. This modulation is used in Codan's 9001, 9002, 3012 and 3212 modems. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, FSKFrequency-Shift Keying 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2.56 kHzKiloHertz (kHz) 10^3 Hz Worldwide Codan Modem.jpg
CompuLert Low speed FSKFrequency-Shift Keying telemetry to monitor and control warning sirens that are used to warn the public of threats such as tsunamis, severe weather, chemical spills and civil emergencies. 453.375 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FSKFrequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide Compulert.jpg
Contestia Contestia, developed by Nick Fedoseev (UT2UZ) in 2005, is a digital mode derived from Olivia. It aims to deliver a compromise of speed and performance. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 150 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2 kHzKiloHertz (kHz) 10^3 Hz Worldwide Contestiathmb.png
Continuous Tone-Coded Squelch System (CTCSS) CTCSS, also known as Private Line and Channel Guard, is a low continuous tone transmitted on NFMNarrowband Frequency Modulation voice transmissions that is used to squelch and manage transmissions on a given frequency. 30 MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation CWContinuous Wave kHzKiloHertz (kHz) 10^3 Hz — 30 kHzKiloHertz (kHz) 10^3 Hz Worldwide CTCSS vce.jpg
D-STAR D-STAR is a digital voice protocol used by ham radio. Is sometimes routed over the internet for international communications. 145.67 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying, GMSKGaussian Minimum-Shift Keying, 4FSK4-Level Frequency Shift Keying 6.25 kHzKiloHertz (kHz) 10^3 Hz Worldwide DSTAR.jpg
DCF77 DCF77 is a German longwave time signal radio station based at 77.5 kHzKiloHertz (kHz) 10^3 Hz. DCF uses an AMAmplitude Modulation modulated carrier and phase modulation sidebands to transmit it's time signal. 77.5 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) AMAmplitude Modulation, PSKPhase-Shift Keying 1.3 kHzKiloHertz (kHz) 10^3 Hz Germany DCF77.jpg
Datawell Buoy HF Link Datawell Buoy HFHigh Frequency (3-30 MHz) Links transmitted by Datawell Marine measurement buoys, measuring ocean conditions, temperature, and wave current. 25.5 MHzMegaHertz (MHz) 10^6 Hz — 45 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying, MFSKMultiple Frequency Shift-Keying 200 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide Datawell 2FSK.jpg
Delfi-C3 Telemetry Delfi-C3 Telemetry is a telemetry signal sent from the Delfi-C3 university-class satellite. 145.87 MHzMegaHertz (MHz) 10^6 Hz LSBLower Side Band Modulation BPSKBinary Phase-Shift Keying (1 bit per symbol) Worldwide Delfi-C3.jpg
Denso 4EA Key Fob Denso Wireless Key Fob 4EA built by Denso Corporation for General Motors auto brands Chevrolet and Buick. Used on Chevrolet Camaro and Malibu from 2016+. Used on Buick Lacrosse 2017+. 433.92 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation AMAmplitude Modulation, ASKAmplitude-Shift Keying 15 kHzKiloHertz (kHz) 10^3 Hz Worldwide HYQ4EA KeyFob.jpg
Differential Global Positioning System (DGPS) Differential GPS (DGPS), also known as M823 DGPS and SC-104 DGPS, is a supplementary correction signal used by GPS receivers to increase the accuracy of GPS based positioning. 283.5 kHzKiloHertz (kHz) 10^3 Hz — 2.95 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.) 150 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide DGPS 200Bd.png
Digital Audio Broadcasting (DAB) A type of digital broadcast radio signal, containing multiple digital radio stations in the signal. 174.928 MHzMegaHertz (MHz) 10^6 Hz — 1,490.625 MHzMegaHertz (MHz) 10^6 Hz RAW OFDMOrthogonal Frequency-Division Multiplexing 1.537 MHzMegaHertz (MHz) 10^6 Hz Worldwide No Audio File DABthmb.jpg
Digital Audio Broadcasting + (DAB+) DAB+ is a type of digital broadcast radio signal, containing multiple digital radio stations in one multiplex. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). OFDMOrthogonal Frequency-Division Multiplexing 1.536 MHzMegaHertz (MHz) 10^6 Hz Worldwide Iq dab f center 208.064MHz f sample 2MHz.png
Digital Dispatch Systems MDT Digital Dispatch Systems Mobile Data Terminal is a dispatching system used by taxi and private transportation companies. 152 MHzMegaHertz (MHz) 10^6 Hz — 854.788 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz United States MDT data terminals.jpg
Digital Enhanced Cordless Telecommunications (DECT) DECT is a ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards. standard for short range communications, mainly cordless phones. It uses a 10 channel/24 slots in a TDMATime Division Multiple Access FDD structure. Audio sample is 100 times slower than real for listening purposes. 1,880 MHzMegaHertz (MHz) 10^6 Hz — 1,900 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) GFSKGaussian Frequency-Shift Keying 1.6 MHzMegaHertz (MHz) 10^6 Hz Worldwide DECT waterfall.jpg
Digital Mobile Radio (DMR) Digital Mobile Radio (DMR) is an open digital mobile radio standard defined by ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards. and used in commercial products around the world. Mostly used by private network and local police, can be encrypted. Used in MOTOTRBO products. 136 MHzMegaHertz (MHz) 10^6 Hz — 860 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation 4FSK4-Level Frequency Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide DMR.jpg
Digital Multimedia Broadcasting (DMB) Digital Multimedia Broadcasting (DMB) is a digital radio transmission technology developed in South Korea as part of the national IT project for sending multimedia such as TV, radio and datacasting to mobile devices such as mobile phones, laptops and GPS navigation systems. 174 MHzMegaHertz (MHz) 10^6 Hz — 216 MHzMegaHertz (MHz) 10^6 Hz DQPSKDifferential Quadrature Phase-Shift Keying-OFDMOrthogonal Frequency-Division Multiplexing 1.536 MHzMegaHertz (MHz) 10^6 Hz South Korea DMB-TDMB-Waterfall-01.jpg
Digital Private Mobile Radio (dPMR) dPMR is an open, non-proprietary trunked radio standard developed by ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards., published under ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards. TS 102 658. Supports both data and digital voice transmission. 149.019 MHzMegaHertz (MHz) 10^6 Hz — 446.2 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation 4FSK4-Level Frequency Shift Keying 6.25 kHzKiloHertz (kHz) 10^3 Hz Worldwide DPMR.jpg
Digital Radio Mondiale (DRM) Digital Radio Mondiale (DRM) is a digital commercial broadcasting mode used to deliver FMFrequency Modulation-comparable sound quality to shortwave radio. 909 kHzKiloHertz (kHz) 10^3 Hz — 26.06 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) QAMQuadrature Amplitude Modulation, OFDMOrthogonal Frequency-Division Multiplexing 4.5 kHzKiloHertz (kHz) 10^3 Hz — 20 kHzKiloHertz (kHz) 10^3 Hz Worldwide DRMimage.png
Digital Video Broadcasting — Terrestrial (DVB-T) Digital Video Broadcasting — Terrestrial (DVB-T) is a digital broadcast television format used in Europe and in many other countries in the world. 474 MHzMegaHertz (MHz) 10^6 Hz — 786 MHzMegaHertz (MHz) 10^6 Hz RAW QAMQuadrature Amplitude Modulation, OFDMOrthogonal Frequency-Division Multiplexing MHzMegaHertz (MHz) 10^6 Hz — 8 MHzMegaHertz (MHz) 10^6 Hz Worldwide DVB-T.PNG
Distress Radiobeacon (Digital) Digital Distress Radiobeacons (EPIRB's, PLB's and ELT's) are emergency radio beacons used for search and rescue operations to locate a vessel, plane, or person in distress. 406 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 1.4 kHzKiloHertz (kHz) 10^3 Hz Worldwide Epirb.jpg
Dual Tone Multi Frequency (DTMF) DTMF is a signaling mode used for a variety of purposes. It's most known for telephony dialing, but is in use for many different applications such as DTMF paging for DTMF-enabled VHFVery High Frequency (30-300 MHz)/UHFUltra High Frequency (300-3000 MHz) radios. 30 MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation MFSKMultiple Frequency Shift-Keying 3.3 kHzKiloHertz (kHz) 10^3 Hz Worldwide DTMF tones.png
EFR Teleswitch Europäische Funk-Rundsteuerung (EFR) Teleswitch (European Radio Ripple Control GmbH (ERA) Teleswitch) is an energy management system operated via long-wave radio. Uses two transmitters in Germany and one in Hungary. Also known by DCF39, DCF49 and HGA22. 129.1 kHzKiloHertz (kHz) 10^3 Hz — 139.9 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Central Europe EFR Teleswitch.jpg
Emergency Managers Weather Information Network (EMWIN) - Repeater The Emergency Managers Weather Information Network (EMWIN) is a system for distributing a live stream of weather information in the United States. This is the VHFVery High Frequency (30-300 MHz) Repeater of the network. 163.3 MHzMegaHertz (MHz) 10^6 Hz — 168.813 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation AFSKAudio Frequency-Shift Keying 20 kHzKiloHertz (kHz) 10^3 Hz United States EMWIN.png
Enhanced Digital Access Communications System (EDACS) EDACS is a trunked radio system developed by General Electric and Ericsson. EDACS was invented by General Electric in the mid-80s and is currently owned by Harris Corporation. Harris has announced that EDACS systems will no longer be supported by 2017. 160 MHzMegaHertz (MHz) 10^6 Hz — 941 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GFSKGaussian Frequency-Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz — 25 kHzKiloHertz (kHz) 10^3 Hz United States EDACS96 Waterfallthmb.png
FLEX FLEX (Flexible Wide Area Paging Protocol) is Motorola's high speed one-way paging protocol that supports 1600, 3200, and 6400 bpsBits per second (bps). FLEX can transmit tone, numeric, alphanumeric, and binary data. 169 MHzMegaHertz (MHz) 10^6 Hz — 929 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FSKFrequency-Shift Keying, 4FSK4-Level Frequency Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide FLEX.jpg
FM Broadcast Radio Commercial Broadcast FMFrequency Modulation radio stations. Used for the broadcast of many different radio programs, including music, news, sports, weather, and talk shows. 65 MHzMegaHertz (MHz) 10^6 Hz — 108 MHzMegaHertz (MHz) 10^6 Hz WFMWideband Frequency Modulation FMFrequency Modulation 38 kHzKiloHertz (kHz) 10^3 Hz — 200 kHzKiloHertz (kHz) 10^3 Hz Worldwide Broadcast FM.jpg
FSQ Fast Simple QSO (FSQ) is an amateur radio digital modulation mode developed by Con Wassilieff ZL2AFP with Murray Greenman ZL1BPU in 2015. 3.58 MHzMegaHertz (MHz) 10^6 Hz — 10.149 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) IFK+Offset Incremental Frequency Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide FSQ.png
FT8 FT8 is an amateur radio QSO communication protocol USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide NoWaterfallFiller.png
FUNcube-1 Telemetry FUNcube-1 Telemetry is a telemetry signal sent from the Funcube-1 Cubesat amateur radio satellite. 145.935 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide FUNcube.jpg
GMDSS Digital Selective Calling Global Maritime Distress and Safety System's Digital Selective Calling (GMDSS-DSC) is a maritime communication protocol intended to initiate ship-to-ship, ship-to-shore and shore-to-ship radiotelephone and MFMedium Frequency (300-3000 kHz)/HFHigh Frequency (3-30 MHz) radiotelex calls. 2.177 MHzMegaHertz (MHz) 10^6 Hz — 156.625 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide DSC GMDSS.jpg
Global System for Mobile Communications (GSM) GSM is a 2G digital cellular network standard developed by ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards.. As of 2014 it has become the default global standard for mobile communications. 450 MHzMegaHertz (MHz) 10^6 Hz — 1,800 MHzMegaHertz (MHz) 10^6 Hz RAW GMSKGaussian Minimum-Shift Keying 200 kHzKiloHertz (kHz) 10^3 Hz Worldwide GSMthmb.jpg
HC-265 Voice Scrambler HC-265 is a Voice Scrambling mode developed by Hagelin Crypto for their HC-265 CRYPTOCOM secure voice unit. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 2.25 kHzKiloHertz (kHz) 10^3 Hz — 3 kHzKiloHertz (kHz) 10^3 Hz Worldwide HC 265.jpg
HD Radio (AM) HD Radio is a proprietary digital broadcast radio format transmitted in North America, usually as sidebands on analog carriers. This is the AMAmplitude Modulation band implementation of HD Radio. 535 kHzKiloHertz (kHz) 10^3 Hz — 1.7 MHzMegaHertz (MHz) 10^6 Hz RAW OFDMOrthogonal Frequency-Division Multiplexing 30 kHzKiloHertz (kHz) 10^3 Hz North America Hd radio am.jpg
HD Radio (FM) HD Radio is a proprietary digital broadcast radio format transmitted in North America, usually as sidebands on analog carriers. This is the FMFrequency Modulation band implementation of HD Radio. 87.7 MHzMegaHertz (MHz) 10^6 Hz — 107.9 MHzMegaHertz (MHz) 10^6 Hz RAW OFDMOrthogonal Frequency-Division Multiplexing 400 kHzKiloHertz (kHz) 10^3 Hz North America HD Radio fm broadcast.jpg
HFGCS (High Frequency Global Communications System) HFGCS is a series of networks deployed by the United States Air Force to send encoded messages to deployed aircraft. This network is well known for it's coded EAM's (Emergency Action Messages) used for coordinating United States Strategic Nuclear Forces. 4.724 MHzMegaHertz (MHz) 10^6 Hz — 15.016 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) 2.95 kHzKiloHertz (kHz) 10^3 Hz Worldwide 11175 KHZ Crop Waterfall.png
HORYU-4 Telemetry 437.375 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) BPSKBinary Phase-Shift Keying (1 bit per symbol) Worldwide HORYU-4 Telemetry Waterfall.jpg
High Frequency Data Link (HFDL) HFDL, also known as HFHigh Frequency (3-30 MHz)-ACARS, ARINC 753, ARINC 635, and HFHigh Frequency (3-30 MHz) DATALINK,is a data link that aircraft use to communicate short messages over long distances using HFHigh Frequency (3-30 MHz) signals. 2.9 MHzMegaHertz (MHz) 10^6 Hz — 22 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.4 kHzKiloHertz (kHz) 10^3 Hz Worldwide HFDL.jpg
High Frequency Data and Voice Link (HFDVL) HFDVL (or HFD+VL) is an experimental mode developed by research groups from The University of Las Palmas de Gran Canaria and The Polytechnic University of Madrid. This mode is intended for military use in accordance with STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5066 parameters. 14.35 MHzMegaHertz (MHz) 10^6 Hz — 14.829 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing, QAMQuadrature Amplitude Modulation kHzKiloHertz (kHz) 10^3 Hz Spain HFDVL.jpg
Hyundai Mobis RKE-4F16 Key Fob Hyundai Mobis RKE-4F16 Wireless Key Fob for Hyundai Sonata models 2014-Present. 433.92 MHzMegaHertz (MHz) 10^6 Hz WFMWideband Frequency Modulation FSKFrequency-Shift Keying 110 kHzKiloHertz (kHz) 10^3 Hz Worldwide Hyundai Key Fob.jpg
ICAO Selcal ICAO Selcal (also known as AVCALL, ANNEX 10, or just SELCAL) is a HFHigh Frequency (3-30 MHz)/VHFVery High Frequency (30-300 MHz) aviation selective calling system used by ground stations to initiate radio communications with aircraft. MHzMegaHertz (MHz) 10^6 Hz — 300 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 1.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide ICAO Selcall sample.jpg
Inmarsat Aero Inmarsat Aero is the protocol that's used to link ground stations with aircraft via Inmarsat's satellite link. This protocol carries digital voice, fax and low speed data such as ACARS and ADS-C. 1,545 MHzMegaHertz (MHz) 10^6 Hz — 3,687 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 10.5 MHzMegaHertz (MHz) 10^6 Hz Worldwide Inmarsat Aero.jpg
Inmarsat IsatM2M IsatM2M Service operated by Inmarsat on existing Inmarsat-D/D+ infrastructure. 1,525 MHzMegaHertz (MHz) 10^6 Hz — 1,559 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 1.024 kHzKiloHertz (kHz) 10^3 Hz Worldwide Inmarsat-D.jpg
Inmarsat-C TDM Inmarsat C provides two-way data and messaging communication services to and from virtually anywhere in the world. The low-cost terminals and antennas are small enough to be fitted to any size of ship. 1,537.7 MHzMegaHertz (MHz) 10^6 Hz — 1,539.685 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide Inmarsat TDM NCS.jpg
Inmarsat-D/D+ Downlink Inmarsat D+ (and it's predecessor, Inmarsat D) is Inmarsat's satellite paging system. The main use of this technology nowadays is in tracking trucks and buoys and SCADA applications. 1,525 MHzMegaHertz (MHz) 10^6 Hz — 1,559 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 640 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide Inmarsat D.jpg
Integrated Digital Enhanced Network (iDEN) iDEN is a TDMATime Division Multiple Access-based digital wireless standard developed by Motorola. It is a type of trunked radio with cellular phone benefits. 806 MHzMegaHertz (MHz) 10^6 Hz — 869 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation QAMQuadrature Amplitude Modulation, TDMATime Division Multiple Access 18.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide IDEN image.jpg
Ionosonde An Ionosonde (Also known as a chirpsounder or ionospheric sounder) is a radar that examines the Ionosphere and monitors HFHigh Frequency (3-30 MHz) propagation conditions by sweeping the HFHigh Frequency (3-30 MHz) band and receiving the echoes. MHzMegaHertz (MHz) 10^6 Hz — 40 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMCW HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide Ionosonde2e.png
Iranian Navy QPSK Modem Iranian Navy QPSKQuadrature Phase-Shift Keying (2 bits per symbol) Modem is a QPSKQuadrature Phase-Shift Keying (2 bits per symbol) mode used by the Iranian Navy. It has gone through several versions. The current version (2015) is V2 and supports speeds of 468 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., 936 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., and 1872 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. 8.046 MHzMegaHertz (MHz) 10^6 Hz — 17.382 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2.85 kHzKiloHertz (kHz) 10^3 Hz Iran Iranian Navy QPSK 468.jpg
Iridium This is the L-band uplink/downlink for the Low Earth Orbit Iridium Satellite Constellation. This system is used for satellite based phone calls. 1,616 MHzMegaHertz (MHz) 10^6 Hz — 1,626.5 MHzMegaHertz (MHz) 10^6 Hz RAW PSKPhase-Shift Keying 31.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide IridiumTDMA.png
Israeli Navy Hybrid Modem (188-110 MOD) The Israeli Naval Hybrid Modem is based on the MIL-STD-188-110 Serial Standard. Has characteristic preamble with 4/6 Tone and 18 QPSKQuadrature Phase-Shift Keying (2 bits per symbol) parallel mode before 110 Serial transmission. Possible use as a broadcast transmitter for ships. Used by the Israeli Navy 4XZ station from Haifa. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.75 kHzKiloHertz (kHz) 10^3 Hz Israel Mil Mod Israeli.jpg
JJY JJY, also known as JJY-40 and JJY-60, is the call sign for a pair of longwave Time Signal stations in Japan. 40 kHzKiloHertz (kHz) 10^3 Hz — 60 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) AMAmplitude Modulation HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Japan JJY.png
JT65 JT65 is an amateur radio QSO communication protocol developed by Joe Taylor, K1JT. JT65 has 3 submodes: JT65A, JT65B, and JT65C. The most popular submode of JT65 is JT65A. JT65 gets '65' from the 65 tones it uses. 1.838 MHzMegaHertz (MHz) 10^6 Hz — 50.276 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 180 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 710 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide JT65AWaterfall.png
Japanese Slot Machine (XSL) The Japanese Slot Machine (Enigma Designation XSL) is a simplex system used by the Japanese Maritime Self-Defense Force in Ichihara, Japan. 4.153 MHzMegaHertz (MHz) 10^6 Hz — 8.703 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Japan XSL idle.jpg
Jindalee Operational Radar Network (JORN) JORN is an Australian OTHR system that operates uniquely in that it's radar bursts include an intro tone before the burst. 8.992 MHzMegaHertz (MHz) 10^6 Hz — 22.95 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMCW 10 kHzKiloHertz (kHz) 10^3 Hz Australia JORN.png
LORAN LORAN (short for LOng RAnge Navigation) is a hyperbolic radio navigation system. 100 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PPMPulse Position Modulation 20 kHzKiloHertz (kHz) 10^3 Hz Worldwide LORAN.png
LTE Uplink Acquired via telecommunications carrier hardware during interference investigation of an Australian cellular network. 700 MHzMegaHertz (MHz) 10^6 Hz — 2,600 MHzMegaHertz (MHz) 10^6 Hz SC-FDMAFrequency Division Multiple Access QPSKQuadrature Phase-Shift Keying (2 bits per symbol) MHzMegaHertz (MHz) 10^6 Hz Worldwide LTE Uplink.PNG
Lightning Sferics VLFVery Low Frequency (3-30 kHz) RFRadio Frequency emissions from lightning in the atmosphere that can affect up to HFHigh Frequency (3-30 MHz) frequencies and beyond depending on strength. Has a popping crackle sound with both USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) and AMAmplitude Modulation modes of reception. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 30 MHzMegaHertz (MHz) 10^6 Hz Worldwide Lightening Sfpherics.png
Link-11 Link-11 (Also known as ALLIGATOR, STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5511, TADIL-A, MIL-STD-6011, and MIL-STD-188-203-1A) is a Tactical Data Link standard (formerly known as Tactical Digital Information Link (TADIL) used by NATONorth Atlantic Treaty Organization and the US Military for Maritime Tactical Data Exchange. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.5 kHzKiloHertz (kHz) 10^3 Hz — 6 kHzKiloHertz (kHz) 10^3 Hz Worldwide Link-11Waterfall.png
Link-11 (UHF) This is the UHFUltra High Frequency (300-3000 MHz) band variant of Link-11, which is transmitted on a FMFrequency Modulation carrier. The FMFrequency Modulation-demodulated baseband is identical to the HFHigh Frequency (3-30 MHz) Link-11 waveform. 225 MHzMegaHertz (MHz) 10^6 Hz — 399.975 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 30 kHzKiloHertz (kHz) 10^3 Hz Worldwide Link-11 UHF.jpg
LoJack LoJack is a vehicle tracking system that allows vehicles to be tracked by police, with the aim of recovering them in case of theft via a small radio transceiver clandestinely installed in a vehicle. 173.075 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz Worldwide Lojack.jpg
Low Rate Picture Transmission (LRPT) The Low Rate Picture Transmission (LRPT) is a digital transmission system, commonly transmitted by METEOR-M satellites, used to deliver weather images and data. 137 MHzMegaHertz (MHz) 10^6 Hz — 138 MHzMegaHertz (MHz) 10^6 Hz RAW QPSKQuadrature Phase-Shift Keying (2 bits per symbol) 120 kHzKiloHertz (kHz) 10^3 Hz Worldwide LRPTWaterfall.jpg
METOP-A METOP-A Satellite DCP control signal 465.99 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 54 kHzKiloHertz (kHz) 10^3 Hz Worldwide KMS4-Waterfall.jpg
MIL-STD-188-110 Appendix B 39-Tone MIL-STD-188-110 Appendix B is a 39-tone OFDMOrthogonal Frequency-Division Multiplexing DQPSKDifferential Quadrature Phase-Shift Keying mode used to send data and voice. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing 2.4 kHzKiloHertz (kHz) 10^3 Hz Worldwide 188-110 App B.jpg
MIL-STD-188-110 Serial MIL-STD-188-110 Serial is a US Department of Defense standard for HFHigh Frequency (3-30 MHz) Communications, Serial PSKPhase-Shift Keying mode. Can transmit both data and voice with a range of interleaving and speed modes for optimal propagation. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.75 kHzKiloHertz (kHz) 10^3 Hz Worldwide MIL STD 188-110ABC.jpg
MOBITEX MOBITEX is an OSI based open standard, national public access wireless packet-switched data network. 400 MHzMegaHertz (MHz) 10^6 Hz — 900 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GMSKGaussian Minimum-Shift Keying, FFSKFast Frequency-Shift Keying 15 kHzKiloHertz (kHz) 10^3 Hz Worldwide MOBITEX 8000.jpg
MPT 1327 MPT1327 (Ministry of Posts and Telegraph 1327) is a signaling protocol standard for analog trunked radio 162.5 MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz — 25 kHzKiloHertz (kHz) 10^3 Hz Worldwide MPT1327.jpg
MSM-1250 Modem MSM-1250 (Medium Speed Modem) is a 10 FSKFrequency-Shift Keying-2 OFDMOrthogonal Frequency-Division Multiplexing digital data protocol used by the stand-alone modem "SkyFax", used to transmit and receive faxes on HFHigh Frequency (3-30 MHz). MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 2.4 kHzKiloHertz (kHz) 10^3 Hz — 2.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide MSM-1250.jpg
MT63 MT63 is a Orthogonal Frequency Division Multiplexed (OFDMOrthogonal Frequency-Division Multiplexing) digital data mode aimed for use in high noise environments. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) OFDMOrthogonal Frequency-Division Multiplexing, PSKPhase-Shift Keying 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2 kHzKiloHertz (kHz) 10^3 Hz Worldwide MT63.jpg
Mazielka (X06) Mazielka (X06) is a diplomatic selcall system used by the Russian Ministry of Foreign Affairs. Used to alert that a Serdolik transmission is going to occur soon, usually on a different frequency. 4.963 MHzMegaHertz (MHz) 10^6 Hz — 23.458 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 200 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia X06.jpg
Modernised High Frequency Communications System (MHFCS) The Modernised High Frequency Communications System (MHFCS) is an Australian Department of Defense HFHigh Frequency (3-30 MHz) System for their military communications network. Also known as AUS MIL ISBIndependent Side Band Modulation Modem, AUS MHFCS, and ADF HFCS. 2.01 MHzMegaHertz (MHz) 10^6 Hz — 27.478 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 750 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Australia ISB AUS MIL.jpg
Morse Code (CW) CWContinuous Wave Morse Code is the simplest form of transmission found virtually all over the RFRadio Frequency bands for a variety of uses. The most common use of this is for Call-sign Beacons by both Amateur and Military operators. MHzMegaHertz (MHz) 10^6 Hz — 930 MHzMegaHertz (MHz) 10^6 Hz CWContinuous Wave OOKOn-Off Keying Modulation HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide CW.jpg
Motorola Type II Radio trunking control channel. 700 MHzMegaHertz (MHz) 10^6 Hz — 960 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation kHzKiloHertz (kHz) 10^3 Hz Worldwide Moto.jpg
Multi Frequency Shift Keying (MFSK) MFSKMultiple Frequency Shift-Keying is a family of multi-frequency shift keying digital transmission modes. MFSKMultiple Frequency Shift-Keying-8 and MFSKMultiple Frequency Shift-Keying-16 are two well-known amateur radio modes. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 154 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 630 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide MFSK 8 thmb.jpg
Multitone Paging Multitone Paging signal, developed by Multitone Electronics in the UK. Uses similar coding to POCSAG but the headers are different and only work with Multitone's range of paging products 25 MHzMegaHertz (MHz) 10^6 Hz — 470 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz — 25 kHzKiloHertz (kHz) 10^3 Hz Worldwide Multitone Pager.jpg
NFM Voice Used in analog walkie-talkies and communication systems. 27 MHzMegaHertz (MHz) 10^6 Hz — 864 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FMFrequency Modulation kHzKiloHertz (kHz) 10^3 Hz — 30 kHzKiloHertz (kHz) 10^3 Hz Worldwide NFMvoice.jpg
Next Generation Digital Narrowband (NXDN) NXDN is a digital narrowband trunked radio protocol developed by ICOM Inc. and JVC KENVOOD Co. The NXDN protocol is used in commercial, business & industry, transport and Public Safety professional radio systems. NXDN has recently been recognized by the ITU as an international digital radio communications standard. 136 MHzMegaHertz (MHz) 10^6 Hz — 520 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation C4FMContinuous 4-Level Frequency Modulation 6.25 kHzKiloHertz (kHz) 10^3 Hz — 12.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide NXDN.jpg
Nokia Adaptive Message Terminal The Nokia Adaptive Message Terminal, also known as Nokia Adaptive Burst Modem and Kryapp 302, is a Finnish encrypted messaging system suggested to be used by Finnish Intelligence Services and Swedish Military. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz — 1.6 kHzKiloHertz (kHz) 10^3 Hz Worldwide 300 Bd semiidle stanag 4202.jpg
Non-Directional Beacon (NDB) A Non-Directional Beacon (NDB) is a ground-based, low frequency radio transmitter used as an instrument approach for airports and offshore platforms. 190 kHzKiloHertz (kHz) 10^3 Hz — 1.8 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) OOKOn-Off Keying Modulation HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide NDB.jpg
North Korean Diplo FSK North Korean Diplomatic FSKFrequency-Shift Keying link, teletype radio diplomatic usage. Also known as DPRK-FSKFrequency-Shift Keying, KRE-FSKFrequency-Shift Keying, DPRK-ARQAutomatic Repeat reQuestAutomatic Repeat Query, and KEGURI. Has a FECForward Error Correction stream mode and a burst ARQAutomatic Repeat reQuestAutomatic Repeat Query mode. MHzMegaHertz (MHz) 10^6 Hz — 29 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 1.2 kHzKiloHertz (kHz) 10^3 Hz — 1.4 kHzKiloHertz (kHz) 10^3 Hz North Korea DPRK ARQ.jpg
OPERA Beacon / Data OPERA Ad-Hoc Data/Beacon 136 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) ASKAmplitude-Shift Keying HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). World Wide Op02.png
Olivia OLIVIA is an amateur digital teletype mode designed by Pawel Jalocha SP9VRC in 2005. It's goal was to be effective even in poor propagation conditions. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 125 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2 kHzKiloHertz (kHz) 10^3 Hz Worldwide Olivia 8-250y.png
Orbcomm Orbcomm satellites are used for monitoring and sending short text messages. 137 MHzMegaHertz (MHz) 10^6 Hz — 150 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 15 kHzKiloHertz (kHz) 10^3 Hz Worldwide ORBCOMM.jpg
PACKET PACKET, also known as FSK300, AX25, and X25, is a packet based protocol derived from AX.25 and HDLC computer network protocols. Packet radio is a synchronous system in which data is transmitted in ASCII character packets. MHzMegaHertz (MHz) 10^6 Hz — 800 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 730 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide PACKET 300.jpg
PACTOR I PACTOR-I is a digital data protocol combining elements of PACKET and AMTOR ARQAutomatic Repeat reQuestAutomatic Repeat Query. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide PACTOR Addimg.jpg
PACTOR II PACTOR II is an advancement of PACTOR I. It is up to 8 times faster than PACTOR I. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 450 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide PACTOR IIstd.jpg
PACTOR III PACTOR III introduces 6 speed levels that provide higher throughput and improved robustness compared to PACTOR I and II. PACTOR III is on average 3.5 times faster than PACTOR II. With optimal conditions, PACTOR III becomes over 5 times faster. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2.4 kHzKiloHertz (kHz) 10^3 Hz Worldwide PACTORIIIthumb.jpg
PACTOR IV PACTOR IV is the newest iteration of the PACTOR series, advancing from PACTOR I-III. It is 1.5x-3x faster than PACTOR III, and has 10 speed levels. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, QAMQuadrature Amplitude Modulation 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 2.4 kHzKiloHertz (kHz) 10^3 Hz Worldwide PACTOR IV.jpg
PLUTO II OTH Radar PLUTO II is an Over The Horizon Radar based at the UK's RAF Akrotiri base in Cyprus. PLUTO II is very active in Europe. MHzMegaHertz (MHz) 10^6 Hz — 38 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMCW 20 kHzKiloHertz (kHz) 10^3 Hz Cyprus PLUTO II.png
POCSAG POCSAG (Post Office Code Standardisation Advisory Group), also known as Super-POCSAG, Radio Paging Code No. 1 or RPC1, is a one-way 2FSK paging protocol that supports 512, 1200, and 2400 bpsBits per second (bps). 25 MHzMegaHertz (MHz) 10^6 Hz — 932 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FSKFrequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide POCSAG Waterfallthmb.png
Panther-H Modem Panther-H is an intelligent frequency hopping transceiver developed by Racal (now Thales Group). Has a signature 8-burst SOC (Start Of Conversation) sync procedure. Used in Panther-2000H radios 1.5 MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide Panther-H SOC.png
Phase Shift Keying (PSK) PSKPhase-Shift Keying is a digital teletype mode based on Phase-Shift Keying (PSKPhase-Shift Keying) modulation. The most popular amateur radio PSKPhase-Shift Keying mode is PSKPhase-Shift Keying 31. 1.838 MHzMegaHertz (MHz) 10^6 Hz — 909 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 10 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 1 kHzKiloHertz (kHz) 10^3 Hz Worldwide BPSKthumb.png
Polish Intelligence 100bd/625Hz FSK One-way broadcast system, used by one of Polish intelligence agencies for delivery of messages to their operatives abroad on fixed schedules. MHzMegaHertz (MHz) 10^6 Hz — 20 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 3.5 kHzKiloHertz (kHz) 10^3 Hz Poland F11.png
Positive Train Control (PTC) Positive train control (PTC) is a system of functional requirements for monitoring and controlling train movements as an attempt to provide increased safety. 220 MHzMegaHertz (MHz) 10^6 Hz RAW 20 kHzKiloHertz (kHz) 10^3 Hz United States PTC.jpg
Primex Wireless Time Sync Primex Wireless Time Sync is a VHFVery High Frequency (30-300 MHz) Time Synchronization signal used in Primex Wireless's XR Series. 72.02 MHzMegaHertz (MHz) 10^6 Hz — 72.98 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 20 kHzKiloHertz (kHz) 10^3 Hz Worldwide A112.jpg
Project 25 (P25) Project 25 (P25 or APCO-25) is a trunked radio standard developed by The Association of Public Safety Communications Officials International (APCO-25) for use with public safety organizations around the world. 136 MHzMegaHertz (MHz) 10^6 Hz — 860 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying, C4FMContinuous 4-Level Frequency Modulation 12.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide P25.jpg
Quadcopter Telemetry Signal This signal originates from the Silicon Instruments Si1000 Software Defined Radio (SDR) that is a component of the 3DR Telemetry Radio, sold for use as a data link between a computer ground station and a UAV "a drone". 414 MHzMegaHertz (MHz) 10^6 Hz — 935 MHzMegaHertz (MHz) 10^6 Hz FHSS-TDM BPSKBinary Phase-Shift Keying (1 bit per symbol), 8-PSK8-Phase Phase-Shift Keying (3 bits per symbol), QAMQuadrature Amplitude Modulation Worldwide No Audio File Quadcopter.png
RBU RBU is a time code radio station located in Moscow. It transmits a continuous 10 kW time code on 66.66 kHzKiloHertz (kHz) 10^3 Hz. 66.66 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 650 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia RBU .jpg
ROS ROS is an amateur radio teletype free running QSO mode designed for low signal/high noise conditions. 1.8 MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) CDMACode Division Multiple Access, Phase Continious MFSKMultiple Frequency Shift-Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide ROS 8Bd.jpg
RWM RWM is a Russian shortwave time signal station. 4.996 MHzMegaHertz (MHz) 10^6 Hz — 14.996 MHzMegaHertz (MHz) 10^6 Hz CWContinuous Wave OOKOn-Off Keying Modulation HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia RWM.png
Radio Data Link Access Procedure (RD-LAP) Motorola's Radio Data Link Access Procedure (RD-LAP) is a 1G protocol that was used in ARDIS and DataTAC Networks, and is still used in some MDTMobile Data Terminal, A mobile data terminal (MDT) is a computerized device used in public transit vehicles, taxicabs, commercial trucking fleets, military logistics, and emergency vehicles, such as police cars, to communicate with a central dispatch office.'s, as well as gas companies, police departments, fire departments, financial companies, etc. 150 MHzMegaHertz (MHz) 10^6 Hz — 850 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation 4FSK4-Level Frequency Shift Keying 12.5 kHzKiloHertz (kHz) 10^3 Hz — 25 kHzKiloHertz (kHz) 10^3 Hz Worldwide RD-LAP image.jpg
Radio Data System (RDS) Radio Data System (RDS) and it's North American variant, Radio Broadcast Data System (RBDS), are data modes transmitted on subcarriers of commercial FMFrequency Modulation radio station transmissions. 65 MHzMegaHertz (MHz) 10^6 Hz — 108 MHzMegaHertz (MHz) 10^6 Hz DSBDual Side Band Modulation PSKPhase-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Worldwide RBDS.png
Radio Teletype (RTTY) RTTYRadio TeleTYpe (Also known as Baudot or ITA2) uses the Baudot 5-bit alphabet with FSKFrequency-Shift Keying to send text messages over the shortwave. This mode is gradually dying out in favor of more robust modes like PSK31 in the amateur service. 147.3 kHzKiloHertz (kHz) 10^3 Hz — 28.15 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 850 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide RTTY thumbnail.jpg
ReFLEX ReFLEX is a two-way paging variant of FLEX. 896 MHzMegaHertz (MHz) 10^6 Hz — 941 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying 40 kHzKiloHertz (kHz) 10^3 Hz United States ReFLEX.jpg
Redundant Digital File Transfer (RDFT) RDFT is an amateur radio digital mode used to transmit files. 9.065 MHzMegaHertz (MHz) 10^6 Hz — 9.24 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 1.8 kHzKiloHertz (kHz) 10^3 Hz Worldwide Digtrx intro.jpg
Robust PACKET Robust PACKET, also known as HFHigh Frequency (3-30 MHz)-APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area, RPR, Winlink RMS, and APRSlink, is an OFDMOrthogonal Frequency-Division Multiplexing version of the amateur mode PACKET which is optimized for shortwave use. This mode was developed by Spezielle Communications Systeme GmbH & Co. KG (SCS). 3.61 MHzMegaHertz (MHz) 10^6 Hz — 14.103 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide Robust PACKET.jpg
Russian Intelligence 200bd/1000Hz FSK One-way error-correcting broadcast system, used by one of Russian intelligence agencies for delivery of messages to their operatives abroad on fixed schedules. MHzMegaHertz (MHz) 10^6 Hz — 23 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz Russia Russian Intelligence 200bd 1000Hz FSK.jpg
SITOR-A SITOR-A (Also known as AMTOR-A) is one of two modes of SITOR, which stands for Simplex Teletype Over Radio. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide SITOR-A.jpg
SITOR-B SITOR-B is one of two modes of SITOR (Simplex Teletype Over Radio). MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide SITORB.jpg
STANAG 4197 STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4197 is a NATONorth Atlantic Treaty Organization QPSKQuadrature Phase-Shift Keying (2 bits per symbol) OFDMOrthogonal Frequency-Division Multiplexing signal used in ANDVT modems that transmit encrypted digital voice over HFHigh Frequency (3-30 MHz). MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, OFDMOrthogonal Frequency-Division Multiplexing 2.3 kHzKiloHertz (kHz) 10^3 Hz Worldwide STANAG 4197.jpg
STANAG 4285 STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4285 is specified by the NATONorth Atlantic Treaty Organization (North Atlantic Treaty Organization) Military Agency for Standardization in "Characteristics of 1200 / 2400 / 3600 Bits per Second Single Tone Modulators / Demodulators for HFHigh Frequency (3-30 MHz) Radio Links" 1.89 MHzMegaHertz (MHz) 10^6 Hz — 22.7 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying 2.75 kHzKiloHertz (kHz) 10^3 Hz Worldwide STANAG 4285.jpg
STANAG 4481 STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 4481, also known as CRATT, Link-4, and NATONorth Atlantic Treaty Organization-75, is specified by the NATONorth Atlantic Treaty Organization (North Atlantic Treaty Organization) Military Agency for Standardization as a "Minimum technical equipment standards for naval HFHigh Frequency (3-30 MHz) shore-to-ship broadcast system" 2.815 MHzMegaHertz (MHz) 10^6 Hz — 18.016 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying, PSKPhase-Shift Keying 1.5 kHzKiloHertz (kHz) 10^3 Hz — 2.75 kHzKiloHertz (kHz) 10^3 Hz Worldwide STANAG 4481.jpg
STANAG 5065 STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5065 is defined as "Minimum Standards for Naval Low Frequency (LFLow Frequency (30-300 kHz)) Shore-To-Ship Surface Broadcast Systems", with two primary protocols, FSK75 and MSK300. 50 kHzKiloHertz (kHz) 10^3 Hz — 160 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying, MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.) 235 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 360 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide STANAG 5065 FSK.jpg
STP403 Bus PIT System STP403 is a bus PITPassenger Information Terminals, such as bus timetable displays at bus stops system used to update digital displays at bus stops. STP403 was developed by French companies INEO and CESATEC. 164 MHzMegaHertz (MHz) 10^6 Hz — 468.488 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation FFSKFast Frequency-Shift Keying kHzKiloHertz (kHz) 10^3 Hz France Fouine91 MPT1327-Like.jpg
Saab Grintek MHF-50 MFSK Modem The MHF-50 MFSKMultiple Frequency Shift-Keying Modem by Saab Grintek Technologies in South Africa is a data modem that utilizes RTTYRadio TeleTYpe, 2-FSKFrequency-Shift Keying, and 33-MFSKMultiple Frequency Shift-Keying to transmit data 4.245 MHzMegaHertz (MHz) 10^6 Hz — 12.982 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying, FSKFrequency-Shift Keying 2.2 kHzKiloHertz (kHz) 10^3 Hz South Africa MHF-50.jpg
Serdolik Serdolik is a MFSKMultiple Frequency Shift-Keying signal used by the Russian diplomatic service. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) MFSKMultiple Frequency Shift-Keying 1.4 kHzKiloHertz (kHz) 10^3 Hz Russia Crowd 36thmb.jpg
Siemens CHX-200 FSK Modem CHX200, also known as Siemens CHP200 and PRC-921/GY, is a backpack HFHigh Frequency (3-30 MHz) ECCOM transceiver, designed and built by Siemens. 1.5 MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Worldwide CHX200.jpg
Single Sideband Voice Single side band, either lower side band or upper side band, is an AMAmplitude Modulation modulated voice channel with one sideband suppressed. Used in the HFHigh Frequency (3-30 MHz) band by amateur radio hams and aircraft weather reports. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz SSB AMAmplitude Modulation 1.9 kHzKiloHertz (kHz) 10^3 Hz Worldwide SSB Voice.jpg
Slow-Scan Television (SSTV) Slow-scan television (SSTV) is a method for picture transmission used by amateur radio operators to transmit and receive images. MHzMegaHertz (MHz) 10^6 Hz — 300 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMFrequency Modulation 2.5 kHzKiloHertz (kHz) 10^3 Hz Worldwide Robot 36waterfall.jpg
Supervisory Control And Data Acquisition (SCADA) Supervisory Control And Data Acquisition (SCADA) is a control system architecture that is used in industrial applications for computerized automated systems. Wireless telemetry is used on RTU's to send data to control units for operators to utilize. 413 MHzMegaHertz (MHz) 10^6 Hz — 950 MHzMegaHertz (MHz) 10^6 Hz FMFrequency Modulation FSKFrequency-Shift Keying 12 kHzKiloHertz (kHz) 10^3 Hz SCADA waterfall.PNG
TDF TDF is a time signal transmitted on the former carrier of France's France Inter longwave AMAmplitude Modulation radio station on 162 kHzKiloHertz (kHz) 10^3 Hz. 162 kHzKiloHertz (kHz) 10^3 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). France TDF.jpg
Terrestrial Trunked Radio (TETRA) TETRA is a professional mobile radio and two-way transceiver (walkie-talkie) specification 380 MHzMegaHertz (MHz) 10^6 Hz — 430 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation PSKPhase-Shift Keying 25 kHzKiloHertz (kHz) 10^3 Hz Europe TETRA.jpg
Tetrapol Tetrapol is a digital professional mobile radio standard for digital voice and data communication used by public safety and military throughout Europe. Tetrapol was originally developed by Matra Communication (Currently part of EADS/Airbus Group) in France in the 1980's. 370 MHzMegaHertz (MHz) 10^6 Hz — 400 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GMSKGaussian Minimum-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz — 12.5 kHzKiloHertz (kHz) 10^3 Hz Europe Tetrapolnew.jpg
Thales Système 3000 HF Modem Thales Système 3000 is a HFHigh Frequency (3-30 MHz) modem capable of many different modes of transmission. It has a unique preamble and format to it's signals. 1.5 MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PSKPhase-Shift Keying, MFSKMultiple Frequency Shift-Keying kHzKiloHertz (kHz) 10^3 Hz — 3 kHzKiloHertz (kHz) 10^3 Hz Worldwide Systeme Thales ALE and Vx.jpg
The Buzzer (ZhUOZ MDZhB UZB76) The Buzzer, call-sign ZhUOZ (formerly MDZhB and UZB76), is a Russian based military station that occasionally broadcasts Monolit format messages in Russian. Its trademark buzzer is constantly transmitted while there is no message to broadcast. 4.625 MHzMegaHertz (MHz) 10^6 Hz — 6.998 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) 2.8 kHzKiloHertz (kHz) 10^3 Hz Russia Buzzer.png
The Goose Channel marker of the Russian military station nicknamed "The Goose", for its distinct channel marker sound. Uses 3012kHz in nighttime, and 6360kHz in daytime. 3.012 MHzMegaHertz (MHz) 10^6 Hz — 6.36 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) AMAmplitude Modulation 3.1 kHzKiloHertz (kHz) 10^3 Hz Russia 123.png
Tire Pressure Monitoring System (TPMS) TPMS (Tire-Pressure Monitoring System), more specifically Direct TPMS (dTPMS), is a system that uses pressure sensors to monitor tire pressure on vehicles. 315 MHzMegaHertz (MHz) 10^6 Hz — 434 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation FSKFrequency-Shift Keying 100 kHzKiloHertz (kHz) 10^3 Hz Worldwide TPMS.png
UK AM Data System (UK-AMDS) UK AMAmplitude Modulation Data System (UK-AMDS) was developed by BBC Research and Development in 1984 as a way to transmit low bitrate data on BBC Radio 4's LFLow Frequency (30-300 kHz) AMAmplitude Modulation carrier. Elements of this system were adopted into ETSIEuropean Telecommunications Standards Institute. An independent, not-for-profit, standardization organization in the telecommunications industry in Europe, developing global telecommunications standards.'s AMSS. 198 kHzKiloHertz (kHz) 10^3 Hz SSB AMAmplitude Modulation (PSKPhase-Shift Keying) 85 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). United Kingdom BBC teleswitch 2.png
UK GOV/MIL WINDRM51 UK GOV/MIL "WinDRM51" variant. Unknown purpose, But link between UK & Cyprus has been found some years ago. 9.104 MHzMegaHertz (MHz) 10^6 Hz — 13.451 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) OFDMOrthogonal Frequency-Division Multiplexing 2.5 kHzKiloHertz (kHz) 10^3 Hz Europe UK WINDRM51.jpg
UTC (Coordinated Universal Time) Time Standard UTC (Coordinated Universal Time) time standard transmission from NIST (National Institute of Standards and Technology) stations WWV in Fort Collins, Colorado USA and WWVH in Kauai, Hawaii. 2.5 MHzMegaHertz (MHz) 10^6 Hz — 25 MHzMegaHertz (MHz) 10^6 Hz AMAmplitude Modulation kHzKiloHertz (kHz) 10^3 Hz United States UTC Image.jpg
VEZHA-S Two-way 100 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second./500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russian Telegraph system, attributed name VEZHA-C (Tower-S), usage claimed to be by Russian Ministry of Communications (MinComSvyaz Rossii). Possible usage in meteorology under callsign RWD59. 2.755 MHzMegaHertz (MHz) 10^6 Hz — 12.165 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FSKFrequency-Shift Keying 650 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Russia RUS FSK COMMS.jpg
VHF Data Link - Mode 2 (VDL-M2) VDL-M2 (Known as VDL2 or VDLM2) is an evolution of ACARS that's 10 times faster and supports a wider range of information to transmit between aircraft and ground stations. VDL-M2 was developed by ARINC under Rockwell Collins. 117.975 MHzMegaHertz (MHz) 10^6 Hz — 137 MHzMegaHertz (MHz) 10^6 Hz RAW PSKPhase-Shift Keying 25 kHzKiloHertz (kHz) 10^3 Hz Worldwide VDL2 Waterfallthmb.jpg
VHF Omnidirectional Range (VOR) A type of radio navigation system used by aircraft. It is distinctive in that the center frequency is flanked by two FMFrequency Modulation waves. 108 MHzMegaHertz (MHz) 10^6 Hz — 117.95 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation AMAmplitude Modulation, FMFrequency Modulation 21 kHzKiloHertz (kHz) 10^3 Hz Worldwide VORthmbnew.png
Vaisala RS41-SG Weather Balloon (Radiosonde) Weather balloon (radiosonde) telemetry data. 400 MHzMegaHertz (MHz) 10^6 Hz — 410 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GFSKGaussian Frequency-Shift Keying 4.8 kHzKiloHertz (kHz) 10^3 Hz Worldwide Rs41 radiosonde wf.png
Vaisala RS92-SGP Weather Balloon (Radiosonde) Weather balloon (radiosonde) telemetry data. 400.15 MHzMegaHertz (MHz) 10^6 Hz — 405.99 MHzMegaHertz (MHz) 10^6 Hz NFMNarrowband Frequency Modulation GFSKGaussian Frequency-Shift Keying 10 kHzKiloHertz (kHz) 10^3 Hz Worldwide VaisalaRS92SGP.png
Vehicle Counting System Data transmitted from a vehicle counting system installed in car parks. The data is frequency hopping over 10 MHzMegaHertz (MHz) 10^6 Hz. 915 MHzMegaHertz (MHz) 10^6 Hz — 925 MHzMegaHertz (MHz) 10^6 Hz RAW FSKFrequency-Shift Keying 10 MHzMegaHertz (MHz) 10^6 Hz Australia Flinders Uni Vehicle Counting System Waterfall.PNG
Visonic MCT-201 MCT-201 is a Miniature Pendant PowerCode Wireless Transmitter by Visonic. It is designed for emergency and control applications in wireless security systems, and home automation and remote control systems. 315 MHzMegaHertz (MHz) 10^6 Hz — 868 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) PWMPulse Width Modulation kHzKiloHertz (kHz) 10^3 Hz Worldwide MCT-201.jpg
WEFAX Radiofax (Also known as Weatherfax, HFHigh Frequency (3-30 MHz)-FAX, WEFAX, and Weather Facsimile) is a slow scan analog image transmission mode used for the transmission of press images, weather charts, newspapers, and meteorological reports. MHzMegaHertz (MHz) 10^6 Hz — 30 MHzMegaHertz (MHz) 10^6 Hz USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) FMFrequency Modulation kHzKiloHertz (kHz) 10^3 Hz Worldwide Weather Fascimile.jpg
Wireless Temperature Sensor The freezer temperature is requested by a master at regular intervals, and the slave attached to a freezer responds. The communication format appears to be a variant of chirp spread spectrum, (although the spectrum it consumes is quite narrow at ~150 kHzKiloHertz (kHz) 10^3 Hz). 434 MHzMegaHertz (MHz) 10^6 Hz Chirp Spread Spectrum 150 kHzKiloHertz (kHz) 10^3 Hz Australia Waterfall spectrum of Flinders Uni freezer communication.PNG
XM Satellite Radio SiriusXM Satellite Radio: Terrestrial Repeater Signal 2,332.5 MHzMegaHertz (MHz) 10^6 Hz — 2,345 MHzMegaHertz (MHz) 10^6 Hz RAW OFDMOrthogonal Frequency-Division Multiplexing, PSKPhase-Shift Keying North America XM sattelite radio.jpg

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