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Digital Sounds

The following examples of Digital signals are provided by WUN to help you identify the Utility signals you hear on shortwave. For more information on digital signals on HF, please read the Digital Signals FAQ. Additional sound samples can be found on the WUN CD-ROM Volume II, the Signals HF monitoring site, or the Digital Modes site.

Digital Sound Samples
ACARS ALE ANDVT ARQ-M2 ARQ-E3 CLOVER DCF77
DECCA DGPS-MSK DGPS-QPSK GMDSS GWEN HAARP HYPER-FIX
ICAO-SELCAL LINK11 LORAN-C MORSE NDB OTHR PACTOR
PACKET RAC-ARQ RTTY SELSCAN SITOR-A SITOR-A-MKR SITOR-B
SSTV SWED-ARQ VFT VFT-USAF WEFAX  

180k ACARS : Aircraft Communications Addressing and Reporting System
100k ALE : Automatic Link Establishment - MIL-STD-188-141A
204k ANDVT : Advanced Narrowband Digital Voice Terminal (US govt/mil)
166k ARQ-M2 : ARQ-M2 (Moore Code)
119k ARQ-E3 : ARQ-E3 200 baud idling
142k CLOVER : Amateur CLOVER
186k DCF77 : Time Station Signal
330k DECCA : HF Radio Navigation System
226k DGPS-MSK : Differential GPS, Minimum Shift Keying
269k DGPS-QPSK : Differential GPS, Quarternary Phase Shift Keying
29k GMDSS : GMDSS Marine SELCAL System (4125 KHz)
114k GWEN : Ground Wave Emergency Network (149KHz)
548k HAARP : High-frequency Active Auroral Research Program
173k HYPER-FIX : Hyperbolic Radio Navigation System
154k ICAO-SELCAL : ICAO Aeronautical SELCAL
164k LINK11 : Link-11 Network (NATO mil)
169k LORAN-C : Long Range Radio Navigation System
173k MORSE : Morse Code
186k NDB : Non-Directional Beacon
144k OTHR : Over-The-Horizon Radar (probably US mil)
205k PACTOR : PACTOR 200 baud
296k PACKET : PACKET (AX.25) 300 Baud
34k RAC-ARQ : Rac-Arq/Merod
174k RTTY : Radioteletype (Baudot 50 baud)
62k SELSCAN : SELSCAN Link Availability Sounder (US govt)
261k SITOR-A : Telex-Over-Radio
156k SITOR-A MKR : Telex-Over-Radio Idle Marker
369k SITOR-B : Telex-Over-Radio (broadcast)
107k SSTV : Amateur Slow-Scan TV (Martin-1)
282k SWED-ARQ : Swedish ARQ
228k VFT : Voice Frequency Telegraphy RTTY
132k VFT-USAF : Voice Frequency Telegraphy data mux (USAF)
265k WEFAX : Weather Facimile


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