HF Appendix

Decoders

• HF Hardware Decoders

• HF Software Decoders

Links to Source Data

These links represent websites used in assembling this document.

• Antonio I5-56578 Digital Blog

• EA5HVK Weak Signals Software

• Go2decode specifications

• Go2monitor specifications

• Numbers and Oddities website

• Numbers Stations.com

• Priyam.org

• RivetWiki

• Signal Analyzer Blog

• Signal Identification wiki

• Signalsradioscanner.ru

• UDXF at Groups.io

• UDXF Digital Modes page

• Utility World

• Wavecom Online Decoder Help

Callsigns and Identifiers

• Canadian Forces Routing Indicators

• Japanese Callsign List

• Maritime Safety Information List

• Maritime ID Digits(MID) and Maritime Mobile Service Identity (MMSI) List

• Maritime SelCalls

• Military Callsign List

• Routing Indicator Guide

• US Military ALE Identifiers

Sonograms and Audio Samples

These websites contain sonograms (and in some cases, audio samples) of various non-amateur digital modes. These might be helpful in identifying a mode with which you're not familiar.

If you know of any other sites, please feel free to add them here.

• DX Zone - Radio Sounds

• FLDigi - Digital Modes Sight and Sounds

• IARU Monitoring System Region 1 Sound Files

• JVCOMM32 Sound Samples

• Modes and Digital page on the UDXF website

• MultiPSK Digimodes page

• NonStop Systems Radio Sound Samples

• Digital and Tones recordings - Numbers and Oddities

• Signal Identification wiki

Suggested Reading

Here we present links to additional sources of information and background.

If you know of any other sources of useful information, please don't hesitate to add them here.

• See the ALE Networks page for a set of links for a comprehensive list where ALE operation can be found

• Mike Chace-Ortiz's Digital Digest reprints on Amazon

• past WUN newsletters

• Summary of Universal Radio / Info-Tech / DES Terminal units (PDF file)

• Technical Handbook for Radio Monitoring

• The NDB List Website

• The Spectrum Monitor

• Weather Forecasts on the Internet

Virtual Audio Devices

With many - though not all- digital decoding programs, you will need software to route audio from the SDR. This is done through virtual audio devices; links to software for doing this are presented below. Any additions to this list are welcome.

Windows

• VB-Cable
• Virtual Audio Cable
• Voicemeeter
  • Also see 'Banana' and 'Potato' available on the same site

Linux

• Jack Audio
• Pulse Audio
• snd aloop

Mac

• Audio Hijack
• SoundFlower

Other Resources

• French SigInt Wiki (in French)
• HF-FAX website
• HF YouTube Videos
• How do you recognize KG84 Encryption in a NATO75 Broadcast? via MT Milcom blog
• ITU Monitoring Programme
• Leif Dehio's Digital Modes
• NOAA RadioFax Schedules (PDF)
• Ominous Valve - Recordings
• Radio Intrigue (via DXing.com)
• Rivet manual (PDF)
• Russian T600 Frequencies and Callsigns
• Signal Identification (Reddit)
• Signal Monitoring and Analysis
• Undecodeable NATO Digital Signals
• Utility Monitoring Central Links
• Utility World - Digital Intro
• Weather Reporting Messages Information for Shipping Volume D (PDF) Warning: Long Document

Numbers Stations

• ENIGMA 2000 Home Page
• Numbers in Indo-European Languages
• Numbers Stations Research and Information Center

Data based on the original DigiFAQ 5.3, copyright 1995-1997 by Mike Chace-Ortiz and Stan Skalsky, 1995-2010 by Worldwide Utility News. All rights reserved, and used with permission

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