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Signal Name	Description	Frequency	Mode	Modulation	Bandwidth	Location	Sample Audio	Waterfall image
ALE-400	ALE-400 es una versión de radioaficionado del estándar 2G ALE. Es una adaptación para radioafición y redes de comunicaciones para EMERGENCIA.	1.806 MHz — 144.163 MHz	USB	MFSK	400 Hz	Worldwide
AMSAT-P3D	AMSAT-P3D (conocido como Phase 3D, OSCAR-40, y AO-40) es un satélite para uso radioaficionados construido por AMSAT en 2004, algunos sistemas del satélite fallaron.	145.805 MHz — 24,048.285 MHz	USB	PSK	1.6 kHz	Worldwide
ASCII	ASCII (también conocido como ITA5 o IRA) is an amateur radio telegraphy signal using the ITA-5 alphabet.	3 MHz — 450 MHz	NFM, USB	FSK	300 Hz	Worldwide
Automatic Link Establishment (2G ALE)	Automatic Link Establishment, 2G ALE (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 STANAG 5066.	3.068 MHz — 28.313 MHz	USB	MFSK	2 kHz	Worldwide
Automatic Packet Reporting System (APRS)	Packet system for real time data communications. Used by hams for location reporting, weather stations etc.	144.39 MHz — 145.57 MHz	NFM	AFSK	10 kHz	Worldwide
CCIR 493-4 Selcall	CCIR 493-4 Selcall, also known as HFSelcall, Australian Selcall, and Codan 8580 Selcall, is a Selcall standard developed in Australia for the HF band. Used by Amateur radio and Codan Modems.	3 MHz — 30 MHz	USB	FSK	300 Hz	Worldwide
CHIP	CHIP, or CHIP64, is a spread-spectrum PSKmode developed by Antonino Porcino IZ8BLY.	7.09 MHz — 14.11 MHz	USB	PSK	580 Hz	Worldwide
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.	3 MHz — 30 MHz	USB	PSK, QAM	2 kHz	Worldwide
CLOVER 2500	CLOVER 2500 is a new upgrade to CLOVER-2000, adding 25% more speed to the CLOVER system.	3 MHz — 30 MHz	USB	PSK, QAM	2.5 kHz	Worldwide
CLOVER-I	CLOVER-I was the first iteration of the Clover series of digital modes. Was never released for commercial use, replaced by CLOVER-II. Also known as Cloverleaf.	3 MHz — 30 MHz	USB	PSK, QAM	100 Hz	Worldwide
CLOVER-II	CLOVER-II is the advancement of CLOVER-I, with 4 tone pulses and a max data rate of 750 bps. Also known as Q-CLOVER and QUAD-CLOVER.	3 MHz — 30 MHz	USB	PSK, QAM	500 Hz	Worldwide
Coherent BPSK	Coherent BPSK, also known as C-BPSK, was an experimental amateur mode developed by Bill DeCarle VE2IQ.	138 kHz — 18.081 MHz	USB	PSK	200 Hz	Worldwide
Coherent CW	Coherent CW(also known as CCW) was a strictly timed morse code mode designed by Ray Petit W7GHM (The same inventor of CLOVER). CCW depended on accurate timing from both receiver and transmitter.	3 MHz — 30 MHz	USB	OOK	1 Hz	Worldwide
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.	3 MHz — 30 MHz	USB	MFSK	150 Hz — 2 kHz	Worldwide
D-STAR	D-STAR is a digital voice protocol used by ham radio. Is sometimes routed over the internet for international communications.	145.67 MHz	NFM	PSK, GMSK, 4FSK	6.25 kHz	Worldwide
DominoEX	DominoEX, also known as just Domino, is an IFK (Incremental Frequency Keying) mode developed by Murray Greenman ZL1BPU and Con Wassilieff ZL2AFP in 2004 that was the first fully developed iteration of the Domino IFKfamily modes. Used to send text over RF.	5.332 MHz — 28.117 MHz	USB	IFK	173 Hz — 524 Hz	Worldwide
DominoF	DominoF was the first experimental implementation of the Domino family of IFKmodes, developed by Con ZL2AFP. DominoF used dual interleaved tone sets. Superseded by DominoEX.	1.838 MHz — 28.08 MHz	USB	IFK	220 Hz	Worldwide
FSK441	FSK441 is a high speed meteor scatter communication mode. FSK441 uses a baud rate of 441 Bd.	144 MHz — 444 MHz	USB	FSK	1.75 kHz	Worldwide
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 MHz — 10.149 MHz	USB	IFK+	300 Hz	Worldwide
FT8	FT8 is an amateur radio QSO communication protocol		USB	MFSK	50 Hz	Worldwide
FUNcube-1 Telemetry	FUNcube-1 Telemetry is a telemetry signal sent from the Funcube-1 Cubesat amateur radio satellite.	145.935 MHz	USB	PSK	2 kHz	Worldwide
FreeDV COHPSK	FreeDV Coherent PSK(Also known as FreeDV 700) is a robust Digital Voice mode developed by David Rowe for his FreeDV Digital Voice Software.	3 MHz — 30 MHz	USB	PSK	1.5 kHz	Worldwide
Frequency Division Multiplex Digital Voice (FDMDV)	Frequency Division Multiplex Digital Voice (FDMDV), also known as FDMDV 14+1-tone, is a digital voice mode originally developed by Peter Martinez G3PLX and Francesca Lanza HB9TLK. It has since been improved upon by David Rowe.	3 MHz — 30 MHz	USB	PSK	1.125 kHz— 1.3 kHz	Worldwide
G-TOR	Golay-Teleprinting Over Radio (G-TOR) is an FSKproprietary standard developed by Kantronics Inc. and is used by radio amateurs, military (Irish Air Corps/Navy, Mexican army) and governmental agencies (ICRC).	3 MHz — 30 MHz	USB	FSK	350 Hz	Worldwide
Hellschreiber	Hellschreiber (Also known as Feld Hell or just Hell) is a teleprinter system developed in the late 1920's by Rudolf Hell, a German inventor.	3 MHz — 30 MHz	USB	OOK, FSK, MSK	350 Hz — 800 Hz	Worldwide
ISCAT	Ionospheric Scattering (ISCAT) mode used for weak signal long distance radio contact by meteor and Ionosphere scattering.	50 MHz — 148 MHz	USB	MFSK	904 Hz — 1.809 kHz	Worldwide
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 MHz — 50.276 MHz	USB	MFSK	180 Hz — 710 Hz	Worldwide
JT6M	JT6M is part of the WSJT suite of digital weak signal software applications developed by Joe Taylor, K1JT	50.215 MHz — 50.25 MHz	USB	MFSK	1 kHz	Worldwide
JT9	JT9 is a very narrow 9-FSKmode for making contact (QSO's) under extreme weak-signal conditions.	3.578 MHz — 28.079 MHz	USB	MFSK	20 Hz	Worldwide
JTMS	JTMS is a meteor scatter mode that uses MSK. JTMS behaves similarily to FSK441.	3 MHz — 30 MHz	USB	MSK	1.7 kHz	Worldwide
KG-STV	KG-STV is an image transmission mode developed by JJ0OBZ in Japan.	3.733 MHz — 14.233 MHz	USB	FSK	500 Hz — 2.5 kHz	Worldwide
Kiwi	Kiwi is a telemetry mode developed by CNES used on amateur rockets and radio balloons in France.	137.95 MHz — 138.5 MHz	NFM	FSK	12.5 kHz	France
Lentus	Lentus is an extremely slow QRP mode developed by Patrick Lindecker F6CTE used to transmit QRP's at very low power. Each 43-character (75 bit) transmission takes roughly 5 minutes to transmit across 32 possible tones in a tight 25 Hzbandwidth.	136.3 kHz — 14.096 MHz	USB	MFSK	25 Hz	Worldwide
MT63	MT63 is a Orthogonal Frequency Division Multiplexed (OFDM) digital data mode aimed for use in high noise environments.	3 MHz — 30 MHz	USB	OFDM, PSK	500 Hz — 2 kHz	Worldwide
Morse Code (CW)	CW Morse Code is the simplest form of transmission found virtually all over the RFbands for a variety of uses. The most common use of this is for Call-sign Beacons by both Amateur and Military operators.	1 MHz — 930 MHz	CW	OOK	1 Hz	Worldwide
Multi Frequency Shift Keying (MFSK)	MFSK is a family of multi-frequency shift keying digital transmission modes. MFSK-8 and MFSK-16 are two well-known amateur radio modes.	3 MHz — 30 MHz	USB	MFSK	154 Hz — 630 Hz	Worldwide
OPERA Beacon / Data	OPERA Ad-Hoc Data/Beacon	136 kHz — 10,000 MHz	USB	ASK	1 Hz	World Wide
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.	3 MHz — 30 MHz	USB	MFSK	125 Hz — 2 kHz	Worldwide
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.	3 MHz — 800 MHz	USB	FSK	730 Hz	Worldwide
PAX	PAX and PAX2 are developed by Patrick Lindecker F6CTE in 2005, and was derived from Olivia. It utilizes the AX.25 protocol that PACKET uses, and had a minimum SNR of -10dB. Can transmit APRSframes.	3.59 MHz — 144.62 MHz	USB	MFSK	500 Hz	Worldwide
PSK-AM	PSK-AM is an amateur digital mode developed by Patrick Lindecker F6CTE in 2002/2003, and incorporates FEC interleaving. PSK-AM uses the modulation of PSK10/31 with the FEC of SITOR-B.	10.148 MHz — 144.62 MHz	USB	PSK	40 Hz — 180 Hz	Worldwide
PSK2K	PSK2K is a meteor scatter type of mode written by DJ5HG Using a modulation scheme of BPSKat 2000 Bd.	50.36 MHz — 144.36 MHz	USB	PSK	2 kHz	Worldwide
Phase Shift Keying (PSK)	PSK is a digital teletype mode based on Phase-Shift Keying (PSK) modulation. The most popular amateur radio PSK mode is PSK 31.	1.838 MHz — 909 MHz	USB	PSK	10 Hz — 1 kHz	Worldwide
Q15X25	Q15X25, also known as NEWQPSK, is an experimental amateur radio packet modem developed by Pawel Jalocha SP9VRC. Q15X25 is a OFDM QPSKimplementation of the AX.25 Packet protocol used in PACKET.	3.585 MHz — 14.109 MHz	USB	PSK, OFDM	1.95 kHz— 2.35 kHz	Worldwide
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 MHz — 935 MHz	FHSS-TDM	BPSK, QAM, 8PSK		Worldwide	No Audio File
ROS	ROS is an amateur radio teletype free running QSO mode designed for low signal/high noise conditions.	1.8 MHz — 30 MHz	USB	CDMA, Phase Continious MFSK	2 kHz	Worldwide
RTTYM	RTTYM, developed by Nick Fedoseev (UT2UZ) in 2005, is a digital mode derived from Olivia. It aims to deliver a compromise of speed and performance. RTTYM is about 4x faster than Olivia, but trades the speed for reduced robustness and sensitivity.	3 MHz — 30 MHz	USB	MFSK	150 Hz — 2 kHz	Worldwide
Radio Teletype (RTTY)	RTTY (Also known as Baudot or ITA2) uses the Baudot 5-bit alphabet with FSK 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 kHz — 28.15 MHz	USB	FSK	85 Hz — 850 Hz	Worldwide
Redundant Digital File Transfer (RDFT)	RDFT is an amateur radio digital mode used to transmit files.	9.065 MHz — 9.24 MHz	USB	PSK	1.8 kHz	Worldwide
Robust PACKET	Robust PACKET, also known as HF-APRS, RPR, Winlink RMS, and APRSlink, is an OFDMversion 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 MHz — 14.103 MHz	USB	PSK, OFDM	500 Hz	Worldwide
Single Sideband Voice	Single side band, either lower side band or upper side band, is an AM modulated voice channel with one sideband suppressed. Used in the HFband by amateur radio hams and aircraft weather reports.	3 MHz — 30 MHz	SSB	AM	1.9 kHz	Worldwide
Slow-Scan Television (SSTV)	Slow-scan television (SSTV) is a method for picture transmission used by amateur radio operators to transmit and receive images.	3 MHz — 300 MHz	USB	FM	2.5 kHz	Worldwide
THOR	THOR is an adaptation of DominoEX with MFSK16 binary varicode and FEC.	3 MHz — 30 MHz	USB	IFK	173 Hz — 524 Hz	Worldwide
THROB	THROB is a unique data mode that relies heavily on DSP techniques, using MFSK and AMmodulation techniques together.	3 MHz — 30 MHz	USB	MFSK	72 Hz — 188 Hz	Worldwide
VOICE	VOICE is a MFSK mode developed by Patrick Lindecker F6CTE in 2006, and was derived from Olivia. It was designed for blind or partially sighted amateur radio operators.	3 MHz — 30 MHz	USB	MFSK	200 Hz	Worldwide
WSPR	Weak Signal Propagation Reporter.	0 Hz	USB	MFSK	6 Hz	Worldwide
WinDRM	WinDRM is an amateur radio derivation of the Digital Radio Mondiale (DRM) digital voice and data transmission protocol. Also known as HamDRM, and Digital SSTV.	14.236 MHz	USB	QAM, OFDM	2.2 kHz — 2.4 kHz	Worldwide
Yaesu System Fusion	System Fusion is Yaesu's digital voice/data protocol for amateur radio, using the AMBE+2 vocoder on a C4FM signal.	144 MHz — 450 MHz	FM	4FSK	16 kHz	Worldwide