A professional unit is a unit that covers many modes, includes sophisticated analysis tools, and probably costs a lot of money. These units represent the cutting edge in decoder technology. At this time we group Hoka, Wavecom and Universal as professional units. The hobbyist units are those units that include the most common modes, some tools for analysis and are a little more affordable. Public domain units are self explanatory but non the less valu- able as a stepping stone to a more sophisticated unit if you find the area of signals analysis intriguing.
Keep in mind that it is impossible to own or test all the units mentioned here - nor would you want to. Many units provide the same capability and similiar tools and the decision to buy one unit over another will probably come down to cost. Another question to consider is whether or not "hobbiest" units can really be considered serious units for monitoring? If you have the desire to ferret out and identify digital signals then these units will have a high frustration factor because they don't include the wide selection of modes currently on the air or the necessary tools to analyse a signal. If marine, soviet, or amateur monitoring is what you are looking for then these units can be a cost effective selection.
FAX and SSTV units are not covered in this document.
Instead check out one of the best FAX/SSTV references on the net, the HFFAX Homepage. This is maintained by Marius Rensen and covers FAX technology, FAX transmission schedules and decoders. This page also includes SSTV related programs. See the SSTV information in Section 1-F of this document for other net resources.
Specifically this section covers the following data decoders: Professional Units Manufacturer ---------------------------- --------------------------------- M400, M900-VF, M1200, M8000 Universal (obsolete M800,M7000) Code 3, Code 30 Hoka W4010, W4050, W4100 Wavecom
=============================================================================== 5-A. PROFESSIONAL UNITS PROFESSIONAL UNITS =============================================================================== 5-A.1 HOKA Decoders Decoder: Hoka Code 3 (version 5) Level: Comprehensive, sophisticated decoder for Experts Synopsis: The Hoka Code 3 comes in two parts: an interface box which connects to a free serial port of an IBM compatible PC, and the software itself, on a 1.44Mb 3.5 inch PC diskette. The hardware interface box now contains a software controlled filter which improves decoding performance over the previous version (v4). Bandpass filter is automatically controlled in center frequency and bandwidth for optimum setting depending on the decoding module, baud speed and shift setting. The decoder is implemented entirely in software which makes it extremely powerful together with a wealth of analysis tools, most of which are also included as standard. This is probably the most powerful decoder for its price. The user has practically complete control over all important parameters for each mode decoded. Exotic data systems are available as optional software modules, at extra cost. Comprehensive on-screen diagnostics and system information are shown for each mode decoded. Each module is chosen from a simple menu system with one-key commands to set or change system parameters. There is even an optional module (Auto Classification) which will measure the system's baud speed and shift parameters, analyse the bit pattern and jump into the correct decoding module for the received data system! Full Synoptic decoding of meteo AAXX and BBXX codes is also available as an option. Modes Decoded: ARQ6-70 ARQ6-90 & 98 ARQ-E ARQ-N (built info ARQ-E module) ARQ-E3 ARQ-M2-242/2 ch CCIR242 ARQ-M4-242/4 ch CCIR242 (Part of ARQ-M2-242 module) ARQ-M2-342/2 ch CCIR342-2 ARQ-M4-342/4 ch CCIR342-2 (Part of ARQ-M2-242 module) ARQ-S/SI-ARQ ASCII (ITA-5/IRA) AUTOSPEC Baudot RTTY with Auto speed determination Baudot F7BBN RTTY with Auto speed determination COQUELET Mk I (13 tone) (Option "Specials") COQUELET Mk II (8 tone) (Option "Specials") CW with Auto speed determination (uses "Farnsworth" method) DUP-ARQ ARTRAC FAX 60, 90, 120, 240 LPM: 288, 352, 576 IOC B/W & 16 shade FEC-A (with Error correction enabled) FEC-A RAW (no Error correction) GMDSS/DSC (Option "Specials") HC-ARQ (Option "Specials") HELLSCHREIBER HNG-FEC (Option "Specials") AX.25 Packet 300 and 1200 Baud PACTOR, including ICRC and UNHCR variants PICCOLO Mark VI (Option "Specials") POL-ARQ ROU-FEC/RUM-FEC (Option "Specials") SI-FEC/FEC-S SITOR-A SITOR-A RAW SITOR-B SPREAD 11, 21, 51 (built into AUTOSPEC module) SWED-ARQ/ARQ-SWED SYNOP 'AAXX' and 'BBXX' decoding (Option "SYNOP") TORG-10 & 11 (Option "Specials") TWINPLEX Analysis Tools: Signal Spectrum "Analyser" with high precision Baud Rate and Shift measurement Calibrated Signal Oscilloscope (user selectable settings) Signal "Autocorrelation Raw" (on raw audio components) Signal "Autocorrelation Mod" (on modulated components) Signal "Autocorrelation Bit" (on bit pattern component) Text screen based "rough and ready" baud speed indicator Text screen based mark/space ratio bias dist. indicator Graphical bit stream viewer (fully user selectable) Text screen based bit stream viewer with output to disk Character Analysis Simplex (for Simplex ARQ systems) Character Analysis Duplex (for Duplex ARQ and FEC systems) Auto Classification Extras Required: IBM Compatible PC (80286 or 80386 CPU) Mono or Colour Monitor 1 free serial port (for LF3 Interface connection) Supplier: (US) Computer Aided Technologies, PO Box 18285, Shreveport, LA 71138, USA Tel: 318 687-4444 (UK) Ntech Communications, 8 The Crescent, Willingdon, East Sussex, BN20 9RN, United Kingdom Tel: +44 1323 483966 (NL) Hoka Electronics, Flessingsterrein 13, NL-9665, BZ Oude Pekela, Netherlands Tel: +31 5978 12327 Approx. Price: Package GBP USD --------------------------------------- Basic 329 595 Piccolo * 85 Coquelet * 85 HNG FEC, RUM FEC, TORG, HC-ARQ * 115 Synoptic Decoder 65 85 Oscilloscope inc 85 Save to Disk File inc 85 Auto Classify inc 85 Pactor inc 35 Specials (all * above) 150 GMDSS/DCS 75 Post & Packing 10 UK Notes: Prices includes UK sales tax ("VAT") at 17.5% inc - included in basic 499 price - not available separately as "options". * - all grouped together as one option called "specials" -------------------- Decoder: Hoka Code 30 (version 2.0) Level: Comprehensive, VERY sophisticated decoder for Experts Synopsis: Arguably the King of Decoders! The decoder consists of a card which is inserted into a free 8 or 16 bit slot in an IBM compatible PC, together with the decoding software on a 1.44Mb diskette. The decoder board is high-quality, RF screened and makes use of Digital Signal Processing (DSP) techniques. Because of DSP technology, the Code 30 will deal with any traditional system plus complex systems using Phase Shift Keying (PSK) and the like. Its power and flexibility, due to DSP and software based modules, means that many government agencies and military surviellance units make use of the Code 30. Modes Decoded: ARINC ANNEX10 Selcal (aircraft selcals) ARQ6-70 ARQ6-90 & 98 ARQ-E ARQ-N (built info ARQ-E module) ARQ-E3 ARQ-M2-242/2 ch CCIR242 ARQ-M4-242/4 ch CCIR242 (Part of ARQ-M2-242 module) ARQ-M2-342/2 ch CCIR342-2 ARQ-M4-342/4 ch CCIR342-2 (Part of ARQ-M2-242 module) ARQ-S/SI-ARQ ASCII (ITA-5/IRA) AUTOSPEC Baudot RTTY with Auto speed determination Baudot F7BBN RTTY with Auto speed determination COQUELET Mk I (13 tone) (Option "Specials") COQUELET Mk II (8 tone) (Option "Specials") CW with Auto speed determination (uses "Farnsworth" method) DUP-ARQ ARTRAC FAX 60, 90, 120, 240 LPM: 288, 352, 576 IOC B/W and 256 shade at 1024x768. Also Meteosat AM demod. FEC-A (with Error correction enabled) FEC-A RAW (no Error correction) GMDSS/DSC (Option "Specials") HC-ARQ (Option "Specials") HELLSCHREIBER HNG-FEC (Option "Specials") AX.25 Packet 300 and 1200 Baud PACTOR, including ICRC and UNHCR variants PICCOLO Mark VI (Option "Specials") POL-ARQ ROU-FEC/RUM-FEC (Option "Specials") SI-FEC/FEC-S SITOR-A SITOR-A RAW SITOR-B SPREAD 11, 21, 51 (built into AUTOSPEC module) SWED-ARQ/ARQ-SWED SYNOP 'AAXX' and 'BBXX' decoding (Option "SYNOP") TIME (DCF77) - set PC date/time to DCF77 time. TORG-10 & 11 (Option "Specials") TWINPLEX VHF Modes Decoded: ACARS/SITA CCIR 1 Selcal (Option "VHF") CCIR 7 Selcal (Option "VHF") CCITT Selcal (Option "VHF") CTCSS all standard frequencies (Option "VHF") DCS (PL) all standard codes (Option "VHF") DTMF (Option "VHF") EEA Selcal (Option "VHF") EIA Selcal (Option "VHF") EURO Selcal (Option "VHF") NATEL Selcal (Option "VHF") Tone AutoClassification (Option "VHF") Pocsag/Super Pocsag VDEW Selcal (Option "VHF") ZVEI 1 Selcal (Option "VHF") ZVEI 2 Selcal (Option "VHF") Demodulators: OOK, BFSK, BFEK, MFSK, MFEK (up to 40 tones), 2DPSK, 4DPSK, BPSK, QPSK, OQPSK (MSK). Diversity can also be selected. Both input signals are sampled many times PER ELEMENT and best signal chosen in real-time. Analysis Tools: Signal Spectrum "Analyser" with high precision Baud Rate and Shift measurement Audio Oscilloscope with zoom function Signal "Autocorrelation Raw" (on raw audio components) Signal "Autocorrelation Mod" (on modulated components) Signal "Autocorrelation Bit" (on bit pattern component) Text screen based "rough and ready" baud speed indicator Text screen based mark/space ratio bias dist. indicator Graphical bit stream viewer (fully user selectable) Text screen based bit stream viewer with output to disk Character Analysis Simplex (for Simplex ARQ systems) Character Analysis Duplex (for Duplex ARQ and FEC systems) Auto Classification High precision Audio Spectrum Analyser. 3 zoomed displays down to +/-250Hz. Audio Spectrum Waterfall display. 3 zoomed displays down to +/-250Hz. Phase Spectrum Analyser Phase Oscilloscope Phase Plane (aka "Vector scope") Straddle (X tuning screen for FSK's) Save raw digitized/sampled audio to Disk File - 7MB of extended RAM equates to approx 15 minutes "record time" Save Decoded text to Disk File Alphabets (ITA2 variants): Standard International US Military National Scandinavian 3rd shift Greak (Optional) M19 Cyrillic (Optional) M19 Latinized (Optional) M2 3rd Shift Cyrillic (Optional) M2 3rd Shift Latinized (Optional) Hebrew (Optional) Amateur upper/lower case Arabic ATU-70 (Optional) Arabic ATU-70 Latinized (Optional) Arabic ATU-80 4th shift (Optional) Arabic ATU-80 4th shift Latinized (Optional) Farsi (Optional) Extras Required: IBM Compatible PC (at least 80386 CPU - '486 recommended) Mono or Colour Monitor Suppliers: (UK) Ntech Communications, 8 The Crescent, Willingdon, East Sussex, BN20 9RN, United Kingdom Tel: +44 1323 483966 (US) Computer Aided Technologies, PO Box 18285, Shreveport, LA 71138, USA Tel: 318 636 1234 (NL) Hoka Electronics, Flessingsterrein 13, NL-9665, BZ Oude Pekela, Netherlands Tel: +31 5978 12327 Approx. Price: Package GBP --------------------------- Basic 2050 Synoptic Decoder 65 VHF 150 ---------------------------------------------------------------------------- 5-A.2 Wavecom Decoders Decoder: WaveCom W4010 (version 5) Level: Comprehensive, intermediate level decoder Synopsis: The first comprehensive decoder for the amateur as well as professional user. Now being phased out in favour of the more up-to-date W4050 but still widely available on the second hand market. Again, a self-contained unit requiring a composite monitor for the control, and incoming text displays. Like its W4100 bigger brother, this decoder again sports just about every mode that is in regular use on HF plus a good array of analysis tools. Software and modes decoded are held in a number of EPROMs contained in the machine, amking for simple update. Modes Decoded: Baudot RTTY Auto speed determination CW Auto speed determination SITOR-A SITOR-B ASCII (ITA-5/IRA) SI-ARQ FEC-A SI-FEC AUTOSPEC SWED-ARQ ARQ-E ARQ-E3 POL-ARQ ARQ-M2 ARQ-M4 AX.25 Packet 300 and 1200 Baud FAX 60, 90, 120, 240 LPM: 288, 352, 576 IOC Analysis Tools: Speed/Baudrate Determination IAS Baudrate determination Shift Measurement System Alphabet and Bit analysis Unshift On Space (UOS) Multiple Scroll Inhibit Extras Required: Composite Video Monitor Supplier: WaveCom Nachrichtentechnik AG, Badenerstrasse 122, CH-8434, Kaiserstuhl, Switzerland. Tel: 1858 0200 Approx. Price: DM2,500 (excl. Tax) CHF2,300 (excl. Tax) ------------------- Decoder: WaveCom W4050 (Preliminary Info at March 1995) Level: Comprehensive, VERY sophisticated decoder for Experts Synopsis: Will this be the challenger to the Hoka Code 30 and knock it off its throne as "King of Decoders"? This decoder is expected to be released at any time now and will basically be a new W4100. A new PC control system is also planned to be available at the same time as the decoder. Full use will be made of Digital Signal Processing (DSP) technology allowing for the decoding of traditional, and more complex systems, like DPSK, QPSK etc. Otherwise just like the W4100 with a very powerful suite of analysis tools and modes that can be decoded. Modes Decoded: Baudot RTTY Auto speed determination CW Auto speed determination SSTV TORG-10 & 11 SITOR-A SITOR-B ASCII (ITA-5/IRA) SI-ARQ FEC-A FEC-S SI-FEC SPREAD 11, 21, 51 AUTOSPEC DUP-ARQ TWINPLEX ARQ-6-90 & 98 SWED-ARQ ARQ-E ARQ-E3 POL-ARQ ARQ-M2 ARQ-M4 ARQ-N PACTOR, including ICRC variants Hellschreiber Piccolo Mark VI and Mark 12 Coquelet Mark I ROU-FEC/RUM-FEC HC-ARQ HNG-FEC AX.25 Packet 300 and 1200 Baud FAX 60, 90, 120, 240 LPM: 288, 352, 576 IOC Meteosat Satellite FAX Meteo Synoptic Decoder (Optional) POCSAG GOLAY ATIS FMS-BOS INFOCALL Analysis Tools: Fast Fourier Transform Speed/baudrate Determination Real-Time Spectrum Analyser IAS Baudrate determination Fast Fourier Transform Shift Measurement Autocorrelation of signal and data System Alphabet and Bit analysis Bit Length Analysis Automatic Recognition of all systems decoded Extras Required: VGA Monitor Supplier: WaveCom Nachrichtentechnik AG, Badenerstrasse 122, CH-8434, Kaiserstuhl, Switzerland. Tel: 1858 0200 Approx. Price: Unknown at time of writing. -------------------- Decoder: WaveCom W4100 (version 2.5.09) Level: Comprehensive, VERY sophisticated decoder for Experts Synopsis: Until the Hoka Code 30 came along, this was probably the decoder of choice for professional monitors in military and government agencies. The W4100 is a 19 inch rack mounting machine, self-contained unit which requires a VGA monitor as a display. If you want to build your own decoders, software can be loaded into the machine via a front panel mounted 3.5 inch disk drive. Like the Hoka decoders, a comprehensive set of signal analysis tools come as standard and the array of systems that the machine can decode is equally impressive. The display can also show text in English, Arabic, Cyrillic, and Greek directly. Modes Decoded: Baudot RTTY Auto speed determination CW Auto speed determination TORG-10 & 11 SITOR-A SITOR-B ASCII (ITA-5/IRA) SI-ARQ ALIS (RS-ARQ) FEC-A FEC-S SI-FEC SPREAD 11, 21, 51 AUTOSPEC DUP-ARQ TWINPLEX ARQ-6-90 & 98 SWED-ARQ ARQ-E ARQ-E3 POL-ARQ ARQ-M2 ARQ-M4 ARQ-N PACTOR, including ICRC variants Hellschreiber Piccolo Mark VI and Mark 12 Coquelet Mark I ROU-FEC/RUM-FEC HC-ARQ HNG-FEC AX.25 Packet 300 and 1200 Baud FAX 60, 90, 120, 240 LPM: 288, 352, 576 IOC Meteosat Satellite FAX Meteo Synoptic Decoder (Optional) POCSAG GOLAY ATIS FMS-BOS INFOCALL Analysis Tools: Fast Fourier Transform Speed/baudrate Determination Real-Time Spectrum Analyser IAS Baudrate determination Fast Fourier Transform Shift Measurement Autocorrelation of signal and data System Alphabet and Bit analysis Bit Length Analysis Automatic Recognition of all systems decoded Extras Required: VGA Monitor Supplier: WaveCom Nachrichtentechnik AG, Badenerstrasse 122, CH-8434, Kaiserstuhl, Switzerland. Tel: 1858 0200 Approx. Price: DM11,650 (excl. Tax) CHF10,000 (excl. Tax) ---------------------------------------------------------------------------- 5-A.3 Universal Decoders Decoder: Universal M400 (version 2) Description: Entry level decoder for Beginners Synopsis: An easy-to-use decoder with most of the common modes found on both VHF, UHF and HF. Doesn't include CW (morse) which is somewhat surprising. Self-contained unit with a two line LCD display providing for 40 characters of text, there is also an 8000 character scrollable buffer which holds incoming text for review later. Housed in metal case. Universal Radio also supply an IBM computer control and text display option called the CI-400 costing around USD100. Modes Decoded: Baudot RTTY 45, 50, 57, 75, 100 Baud Baudot RTTY 60, 66, 75, 100, 132 WPM SITOR-A SITOR-B ASCII (ITA-5/IRA) 75, 110, 150 Baud FEC-A 96, 144 Baud FAX 120 LPM, 576 IOC POCSAG GOLAY ACARS DTMF 16 digits CTCSS (PL) 41 standard tones DCS (DPL) 104 standard codes Analysis Tools: LED Indicators for Mark, Space, Input and Data Extras Required: Graphics compatible parallel printer (for FAX) Supplier: (US) Universal Radio, 6830 Americana Parkway, Reynoldsburg, Ohio, OH 43068, USA Tel: 614 866 4267 (UK) Martin Lynch, 140-142 Northfield Avenue, Ealing, London, W13 9SB, United Kingdom Tel: +44 181 566 1120 Approx. Price: (US) USD400 (UK) GBP400 (Power Supply GBP20) ------------------ Decoder: Universal M900-VF (version 2) Discription: Entry level decoder for Beginners Synopsis: Easy to use decoder that covers all the main HF data modes. Basically an M400 unit without the VHF stuff and without the self contained display. This one does cover CW (Morse) though. Modes Decoded: Baudot RTTY 45, 50, 75 Baud Baudot RTTY 60, 66, 100 WPM CW 6 to 35 WPM (auto speed determination) SITOR-A SITOR-B FEC-A 96, 144 Baud FAX 60, 120, 240 LPM, 288 or 576 IOC Analysis Tools: LED Indicators for Mark, Space, Error, Data, Squelch, and Limiter. User controls for Normal/Reverse tones, Squelch setting, Change Case, Shift Up, Shift Down and Unshift on Space (UOS). Extras Required: Video Monitor (mono, composite video) Graphics compatible parallel printer (for hard copy) 12V DC Power Supply Supplier: (US) Universal Radio, 6830 Americana Parkway, Reynoldsburg, Ohio, OH 43068, USA Tel: 614 866 4267 (UK) Martin Lynch, 140-142 Northfield Avenue, Ealing, London, W13 9SB, United Kingdom Tel: +44 181 566 1120 Approx. Price: (US) USD500 (UK) GBP530 (Power Supply GBP20) ------------------- Decoder: Universal M1200 Level: Intermediate-level decoder for HF and VHF systems Synopsis: This decoder is comes on a full-size PC card to be inserted into an IBM compatible machine. The control software is supplied on a 3.5 inch PC diskette. Comprehensive on-screen status information and basic diagnostics are included. Modes Decoded: Baudot RTTY 20 to 250 Baud, auto speed determination CW 5 to 90 WPM, auto speed determination SITOR-A SITOR-B ASCII (ITA-5/IRA) 75, 110, 150, 300, 600, 1200 Baud ARQ-M2 86, 96, 100 Baud ARQ-M4 172, 192, 200 Baud ARQ-E 48, 64, 72, 86, 96, 144, 192 Baud ARQ-E3 48, 64, 72, 86, 96, 100, 192, 200 Baud ARQ-6-90 200 Baud FEC-A 96, 144, 192 Baud FAX 60, 90, 120, 240 LPM: 288, 440 or 576 IOC AX.25 Packet 300, 1200 baud POCSAG GOLAY ACARS CTCSS 41 standard frequencies DCS (PL) 104 standard codes Analysis Tools: On-screen tuning and staus information. Multiple Scroll Inhibit, Over-print Inhibit, Automatic Threshold Control, Databit and Literal modes. False colour and zoom for FAX. Incoming text can be saved to disk. User programmable memories and on-screen datascope. Extras Required: IBM compatible PC with VGA or EGA colour or mono monitor Supplier: (US) Universal Radio, 6830 Americana Parkway, Reynoldsburg, Ohio, OH 43068, USA Tel: 614 866 4267 (UK) Martin Lynch, 140-142 Northfield Avenue, Ealing, London, W13 9SB, United Kingdom Tel: +44 181 566 1120 Approx. Price: (US) USD400 (UK) GBP400 ------------------- Decoder: Universal M8000 (version 5) Level: Professional-grade, sophisticated decoder for Experts Synopsis: Stand-alone decoder much used by professional and semi-professional monitoring agencies around the world. Decodes just about anything that you'll hear on VHF or HF, but not quite in the same league as the Hoka PC-based systems or the Wavecom family. Can be fully controlled by a computer or terminal. Ten memories can be used to store favourite operating settings. Housed in a standard 19 inch rack mount cabinet. Modes Decoded: Baudot RTTY 20 to 250 Baud, auto speed determination CW (auto speed determination) SITOR-A SITOR-B ASCII (ITA-5/IRA) 75, 110, 150, 300, 600, 1200 Baud VFT (FDM) 8, 12, 16, or 24 channels Piccolo 6 tone ARQ-M2 86, 96, 100 Baud ARQ-M4 172, 192, 200 Baud ARQ-E 48, 64, 72, 86, 96, 144, 192 Baud ARQ-E3 48, 64, 72, 86, 96, 100, 192, 200 Baud ARQ-S 4, 5, 6, 7 character blocks ARQ-6-90 200 Baud SWED-ARQ 3, 9, 22 character blocks FEC-A 96, 144, 192 Baud FEC-S 96, 100, 144, 192, 200 Baud FAX 60, 90, 120, 240 LPM: 288 or 576 IOC AX.25 Packet 300, 1200 baud PACTOR 100, 200 Baud POCSAG GOLAY ACARS Analysis Tools: Third shift Cyrillic alphabet can be printed on-screen. Literal mode printing of data received, databit mode, auto baudrate, tuning and shift determination. Start printer when upto 3 matching selcalls are received. On-screen tuning scope. Screen print and screen saver. Multi-channel ARQ surveillance function. Signal spectrum display. User settable signal filters. Multiple scroll inhibit and Unshift on Space. Built-in self test functions. Display has on-screen tuning bars and real-time clock. Extras Required: VGA colour monitor (640x860 resolution or better) Graphics compatible parallel printer (for FAX) Supplier: (US) Universal Radio, 6830 Americana Parkway, Reynoldsburg, Ohio, OH 43068, USA Tel: 614 866 4267 (UK) Martin Lynch, 140-142 Northfield Avenue, Ealing, London, W13 9SB, United Kingdom Tel: +44 181 566 1120 Approx. Price: (US) USD1400 (UK) GBP1300 *** NOTE *** Computer Aided Technologies produces a software program COPYCAT-PRO for This machine that will enable complete menu control. Features included in this software are also the ability to simultaneously control the M8000 along with many RADIOs such as JRC's NRD525, NRD 535, Most Icom's including the ICOM R71A, KENWOOD, Watkins Johnson and many Yaesu. Databases of popular SW frequencies are also included with the software program.