About: AMTOR

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AMTOR (Amateur Teleprinting Over Radio) is a type of telecommunications system that consists of two or more electromechanical teleprinters in different locations that send and receive messages to one another. AMTOR is a specialized form of RTTY protocol. The term is an acronym for Amateur Teleprinting Over Radio and is derived from ITU-R recommendation 476-1 and is known commercially as SITOR (Simplex Telex Over radio) developed primarily for maritime use in the 1970s. AMTOR was developed in 1978 by Peter Martinez, G3PLX, with the first contact taking place in September 1978 with G3YYD on the 2m Amateur band. It was developed on homemade Motorola 6800-based microcomputers in assembler code. It was used extensively by amateur radio operators in the 1980s and 1990s but has now fallen out of

Attributes	Values
rdf:type	Thing yago:Abbreviation107091587 yago:Abstraction100002137 yago:Attribute100024264 yago:Form106290637 yago:LanguageUnit106284225 yago:Manner104928903 yago:Part113809207 yago:Property104916342 yago:Relation100031921 yago:Word106286395 yago:WikicatAbbreviations yago:WikicatQuantizedRadioModulationModes
rdfs:label	AMTOR (de) AMTOR (en) AMTOR (ko)
rdfs:comment	AMTOR(Amateur Teleprinting Over Radio)는 아마추어 무선으로 영어 문자를 주고 받는 교신방식을 말한다. (ko) AMTOR (Amateur Teleprinting Over Radio) is a type of telecommunications system that consists of two or more electromechanical teleprinters in different locations that send and receive messages to one another. AMTOR is a specialized form of RTTY protocol. The term is an acronym for Amateur Teleprinting Over Radio and is derived from ITU-R recommendation 476-1 and is known commercially as SITOR (Simplex Telex Over radio) developed primarily for maritime use in the 1970s. AMTOR was developed in 1978 by Peter Martinez, G3PLX, with the first contact taking place in September 1978 with G3YYD on the 2m Amateur band. It was developed on homemade Motorola 6800-based microcomputers in assembler code. It was used extensively by amateur radio operators in the 1980s and 1990s but has now fallen out of (en) AMTOR (engl.: Amateur Teleprinting Over Radio) ist ein Kunstwort und bezeichnet eine digitale Betriebsart im Amateurfunk. Es wurde speziell für den Fernschreibverkehr auf Kurzwelle entwickelt, um die auf diesen Frequenzen vorkommenden Störungen (Schwankungen der Feldstärke, Interferenzen) zu kompensieren. Das Prinzip der Übertragung von Fernschreibzeichen nach dem ARQ- oder FEC-Verfahren existiert im kommerziellen Seefunk unter dem Namen SITOR, SPECTOR oder MICROTOR und wurde für den Amateurfunk entsprechend abgewandelt. (de)
dcterms:subject	Quantized radio modulation modes
Wikipage page ID	2545833 (xsd:integer)
Wikipage revision ID	1057370447 (xsd:integer)
Link from a Wikipage to another Wikipage	QST Microcomputer Error detection and correction Communications protocol Motorola 6800 Baud PSK31 SITOR Amateur radio Forward error correction Radioteletype Quantized radio modulation modes Bit Automatic repeat request Frequency-shift keying ITU-R NAVTEX
Link from a Wikipage to an external page	http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/QS06-81-Martinez.pdf%7Caccessdate=2019-08-30 https://www.itu.int/rec/R-REC-M.476-5-199510-I/en%7Caccessdate=2019-08-30
sameAs	AMTOR AMTOR AMTOR AMTOR AMTOR AMTOR
dbp:wikiPageUsesTemplate	dbt:Amateur-radio-stub dbt:Cite_web dbt:For dbt:Listen dbt:Reflist dbt:Amateur_radio_topics dbt:Digital_modes
description	The text "Welcome to Wikipedia, the free encyclopedia that anyone can edit." sent as AMTOR FEC (en)
filename	AMTOR_sample.ogg (en)
title	A sample AMTOR transmission (en)
has abstract	AMTOR (Amateur Teleprinting Over Radio) is a type of telecommunications system that consists of two or more electromechanical teleprinters in different locations that send and receive messages to one another. AMTOR is a specialized form of RTTY protocol. The term is an acronym for Amateur Teleprinting Over Radio and is derived from ITU-R recommendation 476-1 and is known commercially as SITOR (Simplex Telex Over radio) developed primarily for maritime use in the 1970s. AMTOR was developed in 1978 by Peter Martinez, G3PLX, with the first contact taking place in September 1978 with G3YYD on the 2m Amateur band. It was developed on homemade Motorola 6800-based microcomputers in assembler code. It was used extensively by amateur radio operators in the 1980s and 1990s but has now fallen out of use as improved PC-based data modes are now used and teleprinters became out of fashion. AMTOR improves on RTTY by incorporating error detection or error correction techniques. The protocol remains relatively uncomplicated and AMTOR performs well even in poor and noisy HF conditions. AMTOR operates in one of two modes: an error detection mode and an automatic repeat request (ARQ) mode. The AMTOR protocol utilizes a 7-bit code for each character, with each code-word having four mark and three space bits. If the received code does not match a four-to-three (4:3) ratio, the receiver assumes an error has occurred. In error detection mode, the code word will be dropped; in automatic repeat request mode, the receiver requests that the original data be resent. AMTOR also supports FEC in which simple bit-errors can be corrected. AMTOR utilizes FSK, with a frequency shift of 170 Hz, and a symbol rate of 100 Baud. AMTOR is rarely used today, as other protocols such as PSK31 are becoming favoured by amateur operators for real-time text communications. The ARRL has announced that as of August 17, 2009, it will be dropping AMTOR bulletin service in favor of the more popular MFSK16 and PSK31 modes. (en) AMTOR (engl.: Amateur Teleprinting Over Radio) ist ein Kunstwort und bezeichnet eine digitale Betriebsart im Amateurfunk. Es wurde speziell für den Fernschreibverkehr auf Kurzwelle entwickelt, um die auf diesen Frequenzen vorkommenden Störungen (Schwankungen der Feldstärke, Interferenzen) zu kompensieren. Bei AMTOR handelt es sich um eine Weiterentwicklung des Amateurfunk-Fernschreibens (RTTY). Im Gegensatz zu RTTY handelt es sich um ein Verfahren mit hoher Übertragungssicherheit, da bei einer AMTOR-Verbindung die empfangende Station nach der Aussendung von drei Zeichen zur Quittierung des fehlerfreien Empfangs aufgefordert wird (ARQ, automatic repeat request), oder bei Blindübermittlung die Zeichen redundant sendet (FEC, forward error correction). Bei ARQ sind beide Sender wechselweise in Betrieb und müssen rasch (ca. 20 ms) von Senden auf Empfangen umschalten können. Das Prinzip der Übertragung von Fernschreibzeichen nach dem ARQ- oder FEC-Verfahren existiert im kommerziellen Seefunk unter dem Namen SITOR, SPECTOR oder MICROTOR und wurde für den Amateurfunk entsprechend abgewandelt. Zur Durchführung des AMTOR-Betriebs werden Controller benötigt, die zwischen den Terminal (meist ein gewöhnlicher PC) und den Transceiver geschaltet werden. Es gibt auch kostenlose Software, die die Signale mit einer Soundkarte erzeugt und keinen speziellen Controller mehr benötigt. (de) AMTOR(Amateur Teleprinting Over Radio)는 아마추어 무선으로 영어 문자를 주고 받는 교신방식을 말한다. (ko)
gold:hypernym	System
prov:wasDerivedFrom	wikipedia-en:AMTOR?oldid=1057370447&ns=0
page length (characters) of wiki page	3921 (xsd:nonNegativeInteger)
sound recording	dbr:AMTOR__Sound__1
foaf:isPrimaryTopicOf	wikipedia-en:AMTOR
is Link from a Wikipage to another Wikipage of	List of amateur radio modes SITOR Amateur radio Radioteletype CCIR 476 PACTOR
is foaf:primaryTopic of	wikipedia-en:AMTOR

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