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Autor Tema: Modos de comunicación digital utilizada por radio aficionados  (Leído 2627 veces)

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Sound
Acronym
Description
Common Freqs
Links
Special Thanks
CW 20 wpm
Continuous Wave
. More info
RTTY 45 baudRadio TeleTYpeSends text as 5 bit characters with no error correction. 45 baud is the Amateur standard.14075 KHz USBMore info
RTTY 75 baudRadio TeleTYpeSame as above, except faster. Commonly used in weather data transfer.10536 kHz USB
SITOR-ASimplex Telex Over RadioSends data in a two frequency mode, one for sending and one for receiving an acknowledge. The brief pause you hear in this sample is where the receiving station sends the acknowledge burst.  Automatic Repeat reQuest guarantees delivery.
AMTOR ARQAmateur Teletype Over RadioAs above.
SITOR-BSimplex Telex Over RadioIn this case using Forward Error Correction mode, minimizing errors. Identical format used in SITOR - SImplex Teletype Over Radio, and NAVTEX - NAVigational TEleX. 14070, 6330, 518 kHz, respectively
AMTOR FECAmateur Teletype Over RadioAs above.
ROU-FEC 164.5/218.3 bdRoumanian FECSee above for FEC explanation.HF band Unknown
SWED-ARQSwedish ARQAs above.HF band
PSK-31Phase Shift KeyedCurrently, a quite popular amateur mode providing highly readable teletext over great distances on low power on narrow bandwidth.HF band
MFSKMulti-Frequency Shift KeyingSequential multi-tone data mode near 64bps.HF bandMore infoVan Lanphear
VFTVoice Frequency TelegraphyAn older USAF RTTY-like data modeHF band
Hyperfix A military data or sounding mode.HF band
Hyperfix As above.HF band
ALEAutomatic Link EstablishmentPropagation sounding and messaging used by the military.HF bandMore info
SSTVSlow Scan TeleVisionAmateur video mode carries images one scan line at a time by using a frequency shift for each pixel.14230 kHz USBMore infoPic from Mir on 145.985
WeFaxWeather FaxUsed to send weather maps and photos primarily to ships at sea and operates similarly to SSTV8080 kHz USB
Packet 300 baud Amateur Packet radio sends data in bursts at 300 baud, and waits for an acknowledge packet from the other end before sending the next packet.14105 kHz USBMore info
Packet 1200 baud As above, but faster.144.39 NFM, 145.030 NFM
Bell 103 modem 300 baud Used byWB9AGHweather wire in a Chicago suburb for transmission of weather info. Can be decoded with a telephone modem.147.060 NFM Scott, Jerry in IL
Pactor A sort of combination of Packet and AMTOR used by ships and Amateur Radio on HF.HF band
5/6 tone paging Used for simple tone or voice pagers or ANI. This sample has 2 sequences reading 0-123456 when decoded, the first set use an optional preamble. Steve Donnell
GolayNamed after a mathematicianGolay is a 600 baud paging signal developed by Motorola. Also, Motorola DPL uses the same protocol format as a subaudible tone set of a 23 bit repeated word sent at a 134.5 Hz rate. Gary Gray
POCSAG 512 baudPost Office Code Standarisation Advisory GroupA paging format originating in the UK, used widely in the US.152, 454, 929, and 931 MHz US
POCSAG 1200 baud As above, only faster.
POCSAG 2400 baud As above, faster yet.
FLEX Another paging format common in the US.  2 or 4 level signalling as 1600, 3200, or 6400bd rates.929 and 931 MHz USMore info
ERMESEuropean Radio MEssage System6250 baud paging format used in Europe169MHz in France, Hungary, MalaysiaMore info
AFSK Paging LinkAudio Frequency Shift KeyedAt the paging Tx site, this AFSK is decoded into the "digital" FSK format (e.g, POCSAG).72-75 MHz US, also old mobile phone freqs Steve D.
FLEX Paging Link? Pretty sure this is a paging link from terminal to transmitter940MHz US EJ Caylor
Speedcall DTMFDual Tone Multi FrequencyYep, just like telephone dial, but quite rapid.  This particular use is for water utility telemetry.  Also used for other signalling and over the air device activation.About anywhere, as DTMF falls in the passband of most transceivers anonymous in CA
MODAT Used as ANI or status indicator, precedes or follows voice. Lindsay Blanton
GE-Star Used as ANI or status indicator, precedes or follows voice.155.445 WI State Patrol D1 Lindsay Blanton, Jake Guild
MDC1200 Used as ANI or status indicator, precedes or follows voice.154.130 Milw FD Jake Guild
MDC4800 Mobile Data Terminals (MDTs) used in Police squads.858.2625, 855.7375 in Milwaukee, WI
MDC4800 (ARDIS ) Slightly different in sound, Ardis, now Motient, is a packet switched data network for two-way data transfer.formerly 854.8375 in Milwaukee
MDC4800 (ARDIS at 855.8375) Somewhat different yet in sound.855.8375 in Milwaukee
MDC4800? SAPOL - South Australian Police868.7625 MHz Jon in Australia
RD-LAP 9600 baudRadio Data - Link Access Protocol ?As used by a power utility in Wisconsin. Not fully verified, note similarity to 19.2k variety.938.9375 in WI by WEPCo
RD-LAP 19200 baudRadio Data - Link Access Protocol ?Mobile Data Terminals (MDTs) used in Police squads.856.7375, 857.2625 in Milwaukee, also ARDIS now 854.8375
DataRadioIP Mobile Data Terminals (MDTs) used in Police squads. Uses IP as addressing system and allows Voice Over IP857.2625 Sheboygan Co, WIMore infoMike Mannchen
MMP-4800 (MDI) Mobile Data Terminals (MDTs) used in Police squads and FedEx. Created by a company called Mobile Data International, which was purchased by Motorola. Charles Guerin, Eric Hoefert
Gandalf Mobile Dispatch Licensed toAmerican United Cab in Milwaukee area, evidence of MDT usage.152.42 in Milwaukee, WI Sean Douglas, anonymous
DDS 4800bd QPSKDigital Dispatch SystemsLicensed toYellow Cab in Milwaukee area, evidence of MDT usage, credit, GPS.152.33 in Milwaukee, but any NFM possMore infoBob Brown
IP MobileNet 19.2kbps MDT system. TDMA voice capable using INVADR (formerly Electrocom) ( likely 4-level FSK with FEC, native IP communications)139.375 by the WI State Patrol, 852.6125 Rock Co, WI?More InfoBarry W, Jim Korth
ATCS Spec200Automatic Train Control System4800 baud data system somewhat similar to MDC4800. US Nationwide license toAmerican Ass'n of Railroads (AAR)Standard 6 base and 6 mobile freqs allocated nationwide US in 935-940 band.More infoDave Huoy
EOTDEnd of Train DeviceUsed to monitor and control air pressure, etc on US trains.  AAR standard 1200bd FSK protocol.457.9375, 452.9375More info1200/1800Hz Mark/Space
ARES Railroad Telemetry Used by theBNSF railroad. Data transmission protocol is same as ACARS, datagrams same as ATCS. 161.325, 160.365 Northern ILMore infoDave Huoy
Harmon MCS-1/2 base As used on the CP railroad in WI on the 952MHz band, base side for signal and track control952.28125 in Jefferson Co, WI Erik Coleman
Harmon MCS-1/2 wayside As used on the CP railroad in WI on the 928MHz band, wayside for signal and track indication928.28125 in Jefferson Co, WI Erik Coleman
Harmon HP-1 Railroad Codeline Base As used on the CN/IC railroad on the 952MHz band, wayside for signal and track control952.18125 on CN/IC at Tolono, IL Doug Nipper
Harmon HP-1 Railroad Codeline Wayside As used on the CN/IC railroad on the 928MHz band, wayside for signal and track control928.18125 on CN/IC at Tolono, IL Doug Nipper
Mobitex As used in US byRAM mobile data.935-940 MHz band US anonymous from UK
CDPDCellular Digital Packet DataTypically uses vacant cellular voice channels to transmit 19200 baud data. FedExapparently uses a dedicated frequency system in Chicago on 860.8625 and other freqs. Steve Donnell
Paknet This is another British commercial data system. It uses an X.25 access system.164 MHz UK anonymous from UK
NMT-450Nordic Mobile Telephones control channelIt is a very primitive network (first generation) and uses analog FM with 25 KHz spacing. Similar is NMT-900.463-470 in Sweden Alex Skafidas, John Kristian Snekvik, anonymous
LoJack Not sure what protocol this is, but it is used to direction find stolen vehicles and/or disable ignition.173.075 nationwide US
Cognito This is another British commercial data system178 MHz UK anonymous from UK
GSM digital cellularGlobal System for MobileThis form of digital voice transmission is very common in North America, Europe, and the Middle East890-915 MHz EU?More info
D-AMPS Cellular voiceDigital-Advanced Mobile Phone ServiceThe TDMA based digital standard for the legacy 800MHz cellular system in the US, allowing for 3 conversations per 30kHz channel.879-881 MHz US
AMPS Cellular Control ChannelAdvanced Mobile Phone ServiceThis channel tells cell phones what channel to use for voice, and other information.879-881 MHz USMore info
Motorola Type 1 (old) Trunking Control Channel This 3600 baud channel is used to tell mobile radios which voice frequency to use.851-869 MHz band US, othersMore info
Motorola Type 1 (newer) or  Type 2 Trunking Control Channel As above, but the sound here is nearly the same for newer Type 1, and all flavors of Type 2, except networked systems.851-869 MHz band US, othersMore info
Motorola Networked Trunking Control Channel As above, Networked, or "Smartzone" systems use Type 2 style IDs, which can span across many distinct transmitter sites over a wide area.851-869 MHz band US, othersMore info
Motorola ASTRO APCO-25 Trunking Control Channel This 9600 baud channel is used to tell mobile radios which voice frequency to use. ASTRO is a digital/analog voice trunked radio system.  APCO-25 makes it industry standards compliant for smooth interaction with neighboring systems.851-869 MHz band US, othersMore info
Motorola IMBE (ASTRO APCO-25 Trunked) Digital VoiceImproved Multi-Band ExcitationThis is to be the Common Air Interface (CAI) specified by the APCO-25 standard.  State of MI State Police, also on a 400 MHz military TRS.  The military system is not using a 9600bd control channel, but seems to be using the same voice format. More info
EDACS (Ericsson) Trunking Control Channel This 9600 baud channel is used to tell mobile radios which voice frequency to use.851-869 MHz band US, othersMore info
EDACS (Ericsson) Narrowband Trunking Control Channel This 4800 baud channel is used to tell mobile radios which voice frequency to use.NIPSCO, the northern Indiana power utility has a multi-site networked system.935-940 MHz band USMore info
Aegis Digital Voice (Ericsson) Digital voice format incorporated into EDACS trunked systems. More infoCharles Guerin
VSLEP Digital Voice Digital voice format as used by Motorola radios prior to IMBE format. Rich Carlson
OTAROver The Air Re-keyTransmitted to DES capable radios to update encryption key.160MHz Fed Band USLindsay Blanton
DES EncryptionDigital Encryption System?Probably the most common encrypted digital voice format. Commonly heard on same freqs as analog voice.160MHz Fed Band US, various PDs
DES Encryption - Trunked Same as DES, but on a Motorola trunked system. Note lack of high pitch at end of transmissionMotorola TRS
KY57/58 Encryption Military Voice encryption standard, heard on aircraft/base comms hereUHF air band 376.1 AMMike Hein, others
Racal Cougar Voice Encryption Voice Encryption used by military and special law enforement units.Mostly UK.Bob
Voice Inversion Scrambling Simple voice inversion scrambling.  Not digital, per se, but interesting. F1 Scanner GroupBob
TETRATrans-European Trunked RAdioDigital trunked radio, primarily European390.2375 NFM in Spain Miquel in Spain, Rickey Stein, and anonymous
EFJ LTR Trunking Control subaudibleLogic Trunked RadioEF Johnson trunking format. This subaudible tone sequence is used to tell mobile radios which voice frequency to use. You will need a set of HEADPHONES or speakers/amplifier with plenty of bass response to hear anything as these tones are "SUBAUDIBLE". The audible tones you hear is just a telephone ring. 851-869 MHz band US, others Bruce in Colorado
M/A-Com - OpenSky Digital TrunkingSee CDPD, aboveApparently uses CDPD signalling with voice AMBE CODEC from DVSI851-869 MHz band Pennsylvania state systemMore infohttp://www.wpascanner.com/
220 MHz SEA LTR Trunking Control pilot toneLogic Trunked RadioAs heard in NFM, but actually uses ACSB (similar to SSB) for voice comms. The pilot tone is transmitted about every 10 seconds.  In Milwaukee, 220.0125 is one frequency, but you may have to tune up or down a bit to hear it.  Sorry for the scratchy copy, I'll work on a better sample.220-222 MHz ACSB
GE MARC-V Trunking A trunking system which does not use a control channel.  No longer implemented in the US, some systems linger. More infoIsidoro Hernandez, Carolina, Puerto Rico.   Also Matthew Sadler.
Midland CMS Trunking Control In Jasper, IN area, also in Ottawa, Ont. David confirmed the type.857.0875Mhz in Jasper, IN Chris in IN, David Harris in Ont
MPT 1327 Trunking Control ChannelMinistry of Post and Telecom This format is very common in European countries, Australia, and South Africa. Might be commonly referred to as TaitNet. This channel is used to tell mobile radios which voice frequency to use.More infoMore infoanonymous from UK
MPT1317 A data format found in the UK. It is a variant of MPT1327.86.5875 MHz UK anonymous from UK
Motorola iDen (Nextel) A digital modulation scheme used by the Nextel digital cellular system.851-869 MHz band USMore info
ACARSAircraft Communications And Reporting SystemUsed to transmit aircraft waypoint, temperature, performance, and other data between to and from the ground station.131.55 MHz AMMore info
SCADA telemetrySupervisory Control And Data AcquisitionTechnically this isn't a mode, but a generic term for a data acquistion means. Some of possible data protocols are SC-1801, Harris 5000/6000/XA-21, Telegyr 8979, TRW-9550, and PERT 26/31. This particular signal is heard in the Milwaukee, Wisconsin area. It is a wide signal spanning 952.250 thru 952.750 MHz with this audio being recorded from the center of 952.500 MHz WFM. I have observed directional 900MHz antennas in use at various utility shacks, so I suppose it could be monitoring or control telemetry from these.952.50625 MHz WEPCo anonymous local
SSRSecondary Surveillance Radarused to transmit an aircraft's ID number and altitude to ground controllers. It is otherwise known as a transponder and the transmissions are referred to as "squawks". Aircraft squawk on 1090 MHz when interrogated by ground radar. Listen in SSB or AM mode.1030, 1090 MHz
DMBData Marker BuoyUS Coast Guarddrops these beacons to pinpoint Search And Rescue positions and monitor drift of wreckage.  Continuous tones. This one was set to 242.65 MHz. I'm told ELT's on 121.5 sound the same.243, 121.5 MHz AM
EASEmergency Alert Systemtone sequence which has replaced the old EBS annoying tone. These new tones will be used on commercial and National Weather Serviceradio stations and carry location-specific emergency messages (SAME).162.4-162.55 MHz FM, bcast radio
CompuLert FSK-FMFrequency Shift KeyingLow speed FSK telemetry to monitor and sound warning sirens.  Milw. Co. Emergency Management uses it for tornado siren telemetry.  Voice is also on this freq.453.375 Milwaukee, WIMore info
Zetron Model 6/26 1200 baud FSK telemetry for fire station alerting. 154.175 Waukesha, WI
More info[/t][/c][/t]
Frank Monaco
Radionics Safecom Alarm system telemetry.?
[/t]
Jon in Australia
GPS RTKGlobal Positioning Satellite Real-Time KinematicsNot sure if this is a standard protocol, but the signal is definitely being transmitted from a GPS survey unit to improve accuracy, as close as 1 cmvarious
More Info[/t]
TAG CTX330 F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Magneti Marelli F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Magneti Marelli F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Magneti Marelli F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Pi Research Pi96 Fq Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Pi Research Pi96 Fq Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Pi Research Pi96 Fq Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
TAG CTX400 F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
TAG CTX400 F1 Telemetry Formula 1 Grand Prix car to pit F1 Scanner GroupBob
Magneti Marelli Step 9 ECUEngine Control UnitFormula 1 Grand Prix car to pit400.825 in Canada Charles in Montreal, Bob
.
. .
Mysteries! Heard from home or as noted.
. .
Mystery Railroad Codeline - Base As used on the CN railroad on the ex-IC Dubuque Sub on the 941MHz band, base side for signal and track control932.34375 at Freeport, IL
Mystery Railroad Codeline - Wayside As used on the CN railroad on the ex-IC Dubuque Sub on the 932MHz band, base side for signal and track control941.34375 at Freeport, IL
Mystery Railroad Codeline As used on the P&L RR in Kentucy for signal and track control160.455 on the P&L Chris Dees
Union Switch & Signal 550 Flexicode base As used on the UP railroad on the 952MHz band, wayside for signal and track control952.13125 on the UP at Ellis, IL Doug Nipper (sample) Anonymous (ID)
Union Switch & Signal 550 Flexicode wayside As used on the UP railroad on the 928MHz band, wayside for signal and track indication928.13125 on the UP at Ellis, IL Doug Nipper (sample) Anonymous (ID)
Mystery 864.0875 As used on an LTR trunked system in Milwaukee, probably an MDT of sorts.
Mystery FAA Windshear telemetry As used at the Madison airport for a type of weather conditions monitoring system.  6 bursts from different transmitters, with about a 20 second pause between cycles.162.275 in Madison, WI
Mystery 152.54 As used on what used to be anAmeritech IMTS frequency.
Mystery 453.375 Heard from a distance, a constant tone.
Mystery 154.46375 Power/water utility telemetry, at least in Northern IL, is used to control "power line caps (capacitors)" which compensate for load varitions in the power grid.154.45635, 154.46375, 154.47135, 154.47885 US allocations anonymous in IL, please remind me what the "name" of the protocol or mode is.
Mystery 467.9 Data from survey equipment as used by Edgerton Contractorslevelling a grade, hand-held style radio visible attached to portable unit
Mystery QuickSilver QuickSilver Couriers MDTs on 864.7375 and others on an LTR trunked system in Milwaukee.
Mystery MCTS Milwaukee County Transit System uses this data for AVL fixes and misc MDT stuff.
Mystery VSELP? Pretty sure this is VSELP (Vector Sum Excited Linear Prediction) digital voice.  Used in conventional mode on a MI gas utility on 451.075 and reported as used by the Secret Service in PA. Michael in PA
Mystery MDT Licensed and confirmed toWisconsin Gas in Milwaukee area, evidence of MDT usage.
Mystery RD-LAP? Licensed to MI Gas in Grand Rapids area. Sounds like RD-LAP at an odd bit rate.
Mystery MDT Licensed to John Aegerter in Milwaukee area, evidence of MDT usage, possibly Butler, WI PD. Possibly Cerulean brand Packet-Cluster MDT service, maybe transported by a DataRadio RF modem.152.69 in Milwaukee, WI, othersMore infoBob Brown
Mystery MDT Believed to be a Motorola MDT format.453.1 in Hidalgo Co, TX T.  in TX
Mystery ANI or squelch system? Possible  squelch system used at end of transmission for mobiles. Dan Morley
Mystery Telemetry? In Jasper, IN area. Chris in IN
Mystery digital voice Formula 1 Grand Prix car to pit414.175 in Canada Charles in Montreal
Mystery telem/voice Formula 1 Grand Prix car to pit, possibly scrambled, possible interspersed telemetry457.275 in Canada Charles in Montreal
Mystery telemetry Possible survey data from local municipality.452.825 in Milwaukee, WI
Mystery status box As used by a cement truck firm.452.25 in Milwaukee, WI
Ontario Provincial Police TrunkingVHF Modat trunking based on MDC1200As heard in Canada. Marker channel.  System phasing out in favor of ASTRO trunked.141.450 in Canadarecording in AM?Paulo Lima in Canada, David Harris
Mystery telemetry BC Forest Service weather telemetry402.0375 in Salmo, BC Neil Walker in BC
Mystery Utility telemetry Utilicorp Canada155.325 in Trail, BC Neil Walker in BC
Mystery telemetry
Teck-Cominco [/t]
457.0125 in Trail, BC Neil Walker in BC
Mystery MDT Used by police in Netherlands Huub Roem
Mystery Possible hospital paging, sent every minute29.9 NFM in Norway John Kristian Snekvik
Mystery Possible security company freq142.425 NFM in Norway John Kristian Snekvik
Mystery (ISS?) Possible xmission from International Space Station's Russian Zvezda module143.625 NFM in Norway John Kristian Snekvik
Mystery telemetry Possible power plant telem (Trondheim?)166.250 NFM in Norway John Kristian Snekvik
Mystery Trunked Radio System Norwegian Railways - Possible trunked system?467.700 NFM in Norway John Kristian Snekvik, Martin Kristiansen
Mystery Possible trunked system834.025 NFM in Norway John Kristian Snekvik
Mystery Military in Netherlands?455 MHz band in Netherlands Hans
Mystery Something in Canada?424.3125 heard from Niagara Falls area Mike Trank
Mystery Fire Dispatch Used over an EDACS trunked talkgroup for FD station dispatch data.  Sounds like AX.25 but does not decode.Hartford, CT EDACS system Chris Gordon
[/c]
« Última modificación: 28 de Marzo de 2011, 08:07:57 pm por papones »
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