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Topic: Radioteletype

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  Radio Research Paper - Message Center
Radioteletype System Diagram - Only the frequency shift exciter and transmitter are located in Radio 2.
This device permitted the transmission and reception of radioteletype (RATT) messages between stations that were similarity equipped.
When Radioteletype (RATT) was first introduced to the fleet, broadcast traffic could be cleared at speeds of 60 wpm as compared to the 25 wpm speed of the CW fleet broadcast.
jproc.ca /rrp/mcentdes.html   (5284 words)

 Encyclopedia: Radioteletype   (Site not responding. Last check: 2007-11-07)
Teletype machines in World War II A teleprinter (teletypewriter, teletype or TTY) is a now largely obsolete electro-mechanical typewriter which can be used to communicate typed messages from point to point through a simple electrical communications channel, often just a pair of wires.
Radioteletype (RTTY) is a ((often plural) systems used in transmitting messages over a distance electronically) telecommunications system consisting of two (A character printer connected to a telegraph that operates like a typewriter) teleprinters linked by a (A communication system based on broadcasting electromagnetic waves) radio link.
RTTY uses a variety of different ((electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase) modulation methods, of which (Click link for more info and facts about frequency shift keying) frequency shift keying are the most common.
www.nationmaster.com /encyclopedia/Radioteletype   (298 words)

 A Phone of Our Own: Chapter One   (Site not responding. Last check: 2007-11-07)
Weitbrecht's experience with his radioteletype station, one of the first on the air since amateur radio began, taught him the value of challenging government communications regulations.
In January of 1951, he petitioned the FCC to permit radioteletype operation on a broader range of frequencies.
Weitbrecht's travel with bulky radio equipment and heavy teletypewriters in the 1950s probably shaped his later belief that equipment portability was essential for deaf access to telephony.
gupress.gallaudet.edu /excerpts/enewsPOOOone3.html   (258 words)

 TSC-15 Communications Central
The only electrical difference between the two transmitters seems to be a shorting jumper on the barometric pressure sensor switch in the ground models, presumably added to prevent the radio from reacting to concussion from nearby artillery.
A TS-1635/TSC-15 test box allows the operator to perform a full-duplex voice or radioteletype loopback test of the entire Communications Central, with the exception of the RF power amplifier.
The TS-1635/TSC-15 is wired in parallel with the signal entry panel, and can generate test tones for the field 'phones, monitor audio levels from the field 'phones, and connect the local MITE teleprinter in place of one of the five local teleprinters.
www.hypertools.com /tsc15.html   (1065 words)

 Radioteletype - Howstuffworks "How Ham Radio Works"   (Site not responding. Last check: 2007-11-07)
In my opinion, the 12th edition of the Radioteletype Code Manual is the single most important resource for learning the ins and outs of RTTY decoding.
This unique modem translates radioteletype and Morse Code messages to You can use it with radioteletype, as a data line monitor, as a local network.
In the Canadian Navy, radioteletype was known as RATT and was installed in the rattbay.jpg The radioteletype bay (RATT) aboard HAIDA consisted of the
iseeklinks.com /q/radioteletype.htm   (199 words)

 New Page 1
Much of the forgoing wire teletype equipment could be, and was, used in radioteletype systems, wherein radio waves substituted for wire lines.
O-5/FR: a signal shifter which, when attached to a transmitter radiating continuous-wave radioteletype mark and space signals, caused the transmitter to send out two different frequency or tones-one for mark, the other for space.
AN/FGC-1: a radioteletype terminal set designated to convert the two-tone [or two-frequency] signals received by a AN/FRR-3 into suitable impulses to operate a standard teletypewriter.
www.gordon.army.mil /ocos/Museum/AMC/phone.asp   (1219 words)

 Digital OSCAR Communications
OSCAR 7, launched on November 15, 1974, was the first amateur satellite to use radioteletype (RTTY) for the transmission of spacecraft telemetry.
Radioteletype provided the advantage of transmitting information at a higher rate than was possible using CW at speeds that could be comfortably copied by ear.
The speed at which data can be transferred between transmitter and receiver is an important consideration for low-earth orbiting satellites with limited access times.
www.amsat.org /amsat/articles/kd2bd/Digital   (3463 words)

 AN/GRC-46   (Site not responding. Last check: 2007-11-07)
The transmitter operates on frequencies from 1.5 to 20 mc, transmitting Voice, CW and frequency shifted RadioTeletype signals.
This is the standard antenna for the radioteletype set while working on various frequencies, although any other antenna type can be connceted directly to the transmitter for specific frequencies or special purposes.
This generator provides 27.5 VDC to operate the RadioTeletype set and its components when not being operated on power from the vehicle electrical system.
www.geocities.com /dyouse2000/radio/GRC-46.htm   (1484 words)

 Radioteletype Encyclopedia Article, Description, History and Biography @ AlienArtifacts.com   (Site not responding. Last check: 2007-11-07)
Looking For radioteletype - Find radioteletype and more at Lycos Search.
Find radioteletype - Your relevant result is a click away!
Look for radioteletype - Find radioteletype at one of the best sites the Internet has to offer!
alienartifacts.com /encyclopedia/Radioteletype   (375 words)

 Untitled Document   (Site not responding. Last check: 2007-11-07)
He must be graduated from a radio school recognized and accredited by the Secretary of Transportation and Communications or must have at least one year service as government radio operator; provided, however, that applicants for radioteletype operator license shall be exempted from the requirement of this paragraph.
A holder of a second class radiotelephone operator's license who applies for a first class radiotelephone license shall be examined only on Elements 4 since he has already passed Elements 1, 2, and 3.
The radioteletype practical operation deficiency removal tests within the three- month period (mentioned in 1st paragraph) may be taken on after the other if the applicant so desires.
www.cvis.net.ph /ntc/lawcommloperator.htm   (4104 words)

 [No title]
To successfully monitor radioteletype signals you will need a good short wave receiver, a radioteletype "decoder" device, and a computer or video monitor.
The requirement for radioteletype is that your receiver be "stable" and selective.
I like to be able to store intercepted radioteletype data in a computer file for subsequent analysis, not just read it off a monitor or print it out.
www.textfiles.com /phreak/ctelec1.txt   (6774 words)

 Marine Computer Systems - Pactor and Pactor Modems   (Site not responding. Last check: 2007-11-07)
Chief among these were radioteletype (which dates to WW II and the 1940's) and SITOR (SImple Text Over Radio, sometimes called Narrow Band Direct Printing, which dates to the 1950's and is employed to this day by the Coast Guard and similar agencies around the world to receive weather observations and position reports from ships.
When SCS introduced the first PTC (their version of a hardware box) it included the new Pactor-I protocol along with support for all the established "legacy" protocols like radioteletype and SITOR that Pactor-I was out to supersede.
Like it's distant cousins radioteletype and SITOR, Pactor-I was based on a modulation technique called Frequency Shift Keying, or FSK.
www.marinecomputer.com /articles/pactor.html   (1753 words)

 31C10 POI, Annex G   (Site not responding. Last check: 2007-11-07)
To provide the student with the skills and knowledge necessary to process teletypewriter messages and operate in a high frequency radio data communications net.
G08-LP1: Radioteletype Interrogations, Verifications and Acknowledgements (3 Hrs)
G09-LP1: Operate in a Radioteletype Net (14 Hrs)
www.gordon.army.mil /sigbde15/31C/annexG.htm   (83 words)

 Radioteletype Bay   (Site not responding. Last check: 2007-11-07)
This was one version for arranging a radioteletype bay.
From the bottom to the top: AN/SGC1A teletype terminal set; TT-63A regenerative repeater; Northern Radio Model 107 FSK Demodulator, Marconi CSR5A receiver; Marconi rack mounted speaker.
Instead, HAIDA's system used a frequency shift keyer of the RF type to key the Marconi PV500 RATT transmitter in Radio 2.
www.jproc.ca /rrp/rattbay.html   (71 words)

 The Ultimate Phase modulation - American History Information Guide and Reference
Phase modulation can also be regarded as a special case of quadrature amplitude modulation.
Phase-shift keying refers to the simple case of phase modulation by a simple signal with a discrete number of states, such as in morse code or radioteletype applications.
For example, with only two states, the technique is Binary Phase Shift Keying (BPSK).
www.historymania.com /american_history/Angle_modulation   (162 words)

 Rtty: Information on telnet   (Site not responding. Last check: 2007-11-07)
Hoff was an active radio amateur and a recognized authority in the field of amateur radioteletype...
RTTY RTTY or RadioTeletype is a direct machine to machine communications mode using the Baudot (or Murray) code.
A Look At Radioteletype Communications To Engage Multimedia Mode Press Play Radioteletype (RTTY) is another form of amateur communications.
dxtelnet.quarttelnet.com /rtty   (857 words)

 Papers and Publications
This article is an introduction to the world of amateur radioteletype (RTTY).
It describes the basic techniques and concepts important to understand in amateur radioteletype.
The program simulates and/or includes: a real-time clock, a SELCAL (selective calling system), a W-R-U (answer back system, who are you), a regenerative repeater, a character buffer, a micro text editor, and a control system for the radio station.
w9if.net /iweb/papers   (5704 words)

 New Directions Radio   (Site not responding. Last check: 2007-11-07)
However, it is possible to intercept some news reportage earlier in the process—before it's subjected to final editorial sifting—by tapping into the many streams of copy being distributed globally by the world's news services.
These broadcasts are classed as private transmissions and are subject to communication secrecy laws that make it illegal to divulge their contents to others.
Worldwide Radioteletype News Service Frequency Lists (second edition) details over 200 English language press transmissions.
www.motherearthnews.com /printable/1982_January_February/New_Directions_Radio   (1142 words)

 K1JE - Michael's Ham Radio Page   (Site not responding. Last check: 2007-11-07)
It's not necessarily about winning the contest, just about having fun spending a weekend making lots of contacts with other hams, reaching as many countries as possible.
RTTY (radioteletype): We used to use old teletype machines that required two strong people to lift and that made a lot of noise during use.
PSK31 is the new radioteletype mode that uses phase shift keying instead of the traditional frequency shift keying.
www.joens.org /k1je.html   (907 words)

 New Military List Database Search Results   (Site not responding. Last check: 2007-11-07)
Description: Radio Receiving Set AN/FRR-39 is a diversity equipment used as a terminal in a system that receives frequency shift keyed, single channel, or time division multiplex radioteletype signals.
This equipment consists of two radio receivers and a receiver control unit mounted in an equipment cabinet.
This equipment is operated in conjunction with Radioteletype Terminal Equipment AN/FGC-11(*), or other similar radioteletype converter equipment.
www.nj7p.org /cgi-bin/millist2?mode=normal&name=AN/FRR-39   (152 words)

 A Phone of Our Own: Chapter One   (Site not responding. Last check: 2007-11-07)
In 1950, he sought to expand this long-distance contact by acquiring a used Model 12 "receive only" teletypewriter, usually called a TTY, from a Los Angeles newspaper plant.
With the new machine, he could receive radioteletype communications from Japan, the Philippine Islands, Australia, South America, and many places in the U.S. But it was not long before he realized that receiving radioteletype messages was not enough to satisfy him.
He searched for six months and finally procured a keyboard from an East Coast ham.
gupress.gallaudet.edu /excerpts/enewsPOOOone2.html   (357 words)

Two converters are supplied so that the user may
tune  in  the  same  radioteletype  broadcast  on  two
This method of copying a radioteletype broadcast is
www.tpub.com /content/aerographer/14272/css/14272_52.htm   (202 words)

 TrueTTY - RTTY and PSK31 software free download by Sergei Podstrigailo: Program to receive and transmit RTTY ...
Program to receive and transmit RTTY (radioteletype) and PSK31 (BPSK and QPSK modes) via a sound card.
No additional hardware required - your need only transceiver and computer (5x86-133, Pentium-75 or better) with sound card.
It make fast and convenient frequence control, has a lot macros for tramsmitting.
www.softpile.com /Utilities/Miscellaneous/Review_00724_index.html   (80 words)

 Freeware and Shareware - Software Downloads   (Site not responding. Last check: 2007-11-07)
Program to receive and transmit RTTY and PSK31 via sound card.
Program to receive and transmit RTTY (radioteletype) and PSK31 v.
Program to receive and transmit RTTY (radioteletype) via sound c.
www.greatfreeware.com /Utilities/Misc__Utilities/index10.html   (257 words)

 www.fading.de - Some examples of HF-FAX and RTTY (RadioTeleType)
How to decode RTTY, Fax and other modes..
First here is an example of a weather chart I received from the german weather service (DWD) transmitters at Pinneberg near Hamburg/Germany in HF-FAX mode with 120 lpm:
But these ones are those you can easy decode at home - simply by help of a personel computer (PC) and your receiver.
www.daniel-moeller.de /fading/html/utility3_5.html   (158 words)

 The New Look in Naval Communications  Shipborne Radioteletype   (Site not responding. Last check: 2007-11-07)
The New Look in Naval Communications Shipborne Radioteletype
By the time this article appears many of you will probably have seen and operated the new RATT equipment shortly to be fitted in ships of the Home and Mediterranean Fleets; for those who have not, the photograph will give an idea of what it looks like.
Telegraphists have a lot more typewriter bashing ahead of them yet, perhaps a great deal more than some people expect.
www.rnca.org.uk /history/bay_page.htm   (579 words)

 VLF Meteo RTTY Broadcasts   (Site not responding. Last check: 2007-11-07)
Mode = RATT (75 Baud 850 Hz RTTY Baudot) Radioteletype.
Remarks: H+ 00 = Broadcast time in minutes past hour.
Have you heard a new station not listed?
home.cogeco.ca /~dxinfo/ratt-vlf.htm   (28 words)

 TrueTTY radioteletype software (95/NT) - Jumbo! Utilities
CD and DVD Burners - 414 Model Matches
Program to decode radioteletype (RTTY) via sound card to text.
No additional hardware required - your need only receive and computer (5x86-133 or better) with sound card.
www.jumbo.com /file/5757.htm   (135 words)

 Browsing the inventory of Stone Soup Farm Books by catalog: Textbooks   (Site not responding. Last check: 2007-11-07)
Light rubbing wear to surface of cover; tight spine with clean text.
Contents: Communications Techniques - Amateur Television - Slow-Scan Television - Facsimile - Radioteletype - Space Communications - Advanced Techniques including laser fundamentals and more..
www.biblio.com /browse_books/catalog/126069/7631.html   (4093 words)

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