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Topic: Packet radio


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In the News (Sat 17 Nov 18)

  
  Ham-Shack.com : Packet Radio Explained
Packet radio is communications for the computer age.
Packet radio uses a terminal node controller (TNC) as the interface between a computer and a transceiver.
Although you are operating your packet station on simplex, it is best not to use the designated FM simplex frequencies because packet and voice are not compatible modes.
www.ham-shack.com /packet_radio.html   (2009 words)

  
 Packet Radio
The good thing about packet radio is that you have to know a lot about how it works or memorize a whole new set of technical terms.
Packet is used to pass a message accurately and in large quantities and to handle messages passed by the National Traffic System, it can provide an important function like any other amateur mode when used correctly.
Packet Networks allow amateurs to widen the area of communications past their line of sight, by having a series of packet stations linked by radio, that can be used to get their packet messages to where ever the network goes.
members.tripod.com /~Portalis/HamRadio/Packet.html   (920 words)

  
 Packet Radio
Packet radio is mostly operated in simplex, that is, one transmits at a time.
Packet modems are A LOT more expensive than phone modems, a 56kbs phone modem could cost £50 and a 1200bps packet modem could cost £150 or more.
Packet radio provides similar facilities to the Bulletin Board and the internet such as electronic mail and menu driven information retrieval and file transfer facilities.
www.mccord.plus.com /Radio/packet_radio.htm   (762 words)

  
 Packet Radio Primer
Packet Radio is a digital form of communications.
A packet radio station consists of a 2 meter radio, a terminal node controller (TNC), basically a modem for your radio, a computer running some type of communications software be it written for packet or as simple as a old telephone modem program like Telex, and connecting cables.
The packet stations would need to know what the callsign and/or alias was on each location between there home location and where they wanted to connect.
www.vhfclub.org /packet_radio_primer.htm   (1522 words)

  
 Packet radio - Wikipedia, the free encyclopedia
Modems used for packet radio vary in throughput and modulation technique, and are normally selected to match the capabilities of the radio equipment in use.
The first amateur packet radio stations were constructed using surplus Bell 202 1,200 bit/s modems, and despite its low data rate, Bell 202 modulation has remained the standard for VHF operation in most areas.
Packet radio has most often been used for direct, keyboard-to-keyboard connections between stations, either between two live operators or between an operator and a bulletin board system.
en.wikipedia.org /wiki/Packet_radio   (1223 words)

  
 Ham Radio Online - Metricom's Ricochet Packet Radio Network
In the Ricochet network, a repeater is a digipeater in the traditional amateur radio sense, receiving a packet and forwarding the packet on into the network.
Radio signals run a gauntlet of obstacles inside buildings facing up to 22 db of path loss and deep fades caused by interior multipath.
Cellular Digital Packet Data or CDPD operates within the cellular phone system and provides user throughputs of about 9600 bps but at high costs - both the radio modem and the air time charges are inappropriate for use in general Internet browsing.
www.hamradio-online.com /1996/jan/metricom.html   (1443 words)

  
 WiNRADiO Advanced Digital Suite - Packet Radio Decoder
Packet Radio is the common name for a radio amateur digital network that uses a variant of the X.25 protocol, known as AX.25 (from Amateur X.25).
This decoder is designed to decode Radio Packet transmissions at bit rates of 300, 1200 and 2400 bits/second.
An integrated recording and playback function making it possible to process packet signals off-line, as well as a logging facility to store the received text while the Decoder is running unattended, complement the Advanced Packet Radio Decoder.
www.winradio.com /home/ads-packet.htm   (121 words)

  
 Packet Radio Under Linux   (Site not responding. Last check: 2007-10-09)
Operating an amateur radio station requires an operator's license, which can be obtained by passing an examination that covers radio theory, regulations, operating practices and basic electronics.
Packet radio is one such method in which text is encoded as binary data and transmitted via radio in groups of data, called packets.
As well as being fun, packet radio under Linux taught me a lot about networking, much of which is also applicable to Ethernet, X.25 and other network protocols.
www.linuxjournal.com /node/2218/print   (1379 words)

  
 MAEL-GPS/Amateur Radio - Glossary
A means of adding voice or data to a radio frequency transmission by varying the amplitude of the carrier frequency.
Each Amateur Radio station is assigned a call sign by the government of that country which allows the operator to transmit in the amateur radio bands.
Radio frequency refers to a signal generated by a radio transmitter and sent out through an antenna.
www.grc.nasa.gov /WWW/MAEL/ag/gloss.htm   (626 words)

  
 Radiometrix - Radio Packet Controller
A data packet received by the RPC's transceiver is decoded, stored in a packet buffer and the Host microcontroller signalled that a valid packet is waiting to be uploaded.
The format of the packet is entirely of the users determination except the 1st byte (the Control Byte) which must specify the packet type (control or data) and the packet size.
A packet transferred between host and RPC consists of between 1 and 28 bytes, the first byte of the packet is always the control byte.
www.radiometrix.co.uk /products/rpcsheet.htm   (3963 words)

  
 TAPR Packet Radio
Packet radio has been around since the mid-1960's, but was first seen on the amateur bands in 1978 through research done in Montreal, Canada in 1978.
Packet radio is a particular digital mode of Amateur Radio ("Ham" Radio) communications which corresponds to computer telecommunications.
Packet radio is so named because it sends the data in small bursts, or packets.
www.tapr.org /packetradio.html   (510 words)

  
 Macintosh Packet Radio   (Site not responding. Last check: 2007-10-09)
Amateur packet radio is a computer-to-computer method of amateur (ham) radio.
Most packet radio uses the AX.25 protocol (which is only vaguely related to the commercial X.25 protocol!), but there is also a fair amount of TCP/IP activity.
Packet software can be obtained free, TNCs are cheap (about $100), and nearly any handheld or desktop amateur radio can be used for a packet station.
www.wintertime.com /OH/packet.html   (288 words)

  
 High Speed Packet Radio
Packet has reached a dead end for cost effective useful computer networking.
Paccomm Modern Packet TNC's AND radio's for hams.
radio mod's to convert radio's to to the pitiful low speed of 9600 baud.
www.lmrgroup.com /ke3ht/hspr.html   (577 words)

  
 How to be good at ISS Packet
In countries where Amateur Radio Stations took the time to learn correct packet procedures, the success rate was very high when using the PMS on Mir.
The radio is currently connected to an externally mounted mono band antenna (two antennas on opposite sides of the Zarya (FGB), co-phased together and tuned for 147 MHz).
This packet message means that ISS is trying to disconnect from the station currently connected to this port.
www.marexmg.org /fileshtml/isspacketmanual.html   (4000 words)

  
 Station KA1FSB
The purpose is to offer information that may be useful in setting up and operating packet radio stations, particularly on Linux "platforms."
Packet radio makes a great hobby, but can find special application in times of emergencies or disasters.
Consider what you can do to assist others by maintaining an emergency packet radio station.
ka1fsb.home.att.net   (563 words)

  
 Sound Card Packet
It was originally created as a TNC management utility and has many super features of value to packet users, but this article deals primarily with its ability to encode and decode packet tones using your computer sound card.
AGWPE is particularly valuable since it can act as a "host" program for several good packet programs that do not have sound card modem capabilities of their own.
George says the 300 baud HF modem is so sensitive that it decodes packets you cannot hear; the 1200 baud modem can decode packets even with S3 or less signal strength.
www.freewebtown.com /hamradio/Sound_Card_Packet.htm   (1405 words)

  
 The PacketRadio Beginners Guide to Packet Radio Operating
I had to give the ham who might be willing to give Packet Radio a try, a head start by taking them around the pitfalls that I had experienced when I set up my first Packet station.
The reason is that the TNC manufacturer has no idea what kind of radio or computer you might be connecting to.
It is necessary that each new Packeteer be aware of the meaning of each speed, and the relationship to his/her Packet station.
www.packetradio.com /PKTprimer.html   (2530 words)

  
 Packet Radio : Operating Modes: Packet Radio
Packet radio networking - Packet Radio networking home page with lots of informations and tech.
Packet Radio y TCP/IP - Packet radio applications by Luis Fdo.
It is intended for use on amateur packet radio networks.
www.dxzone.com /catalog/Operating_Modes/Packet_Radio   (1098 words)

  
 Reseau Packet Radio Martinique - Dossiers Techniques -
Link layer packet radio transmissions are sent in small blocks of data, called frames.
The destination address is the call sign and SSID of the amateur radio station to which the frame is addressed, while the source address contains the amateur call sign and SSID of the station that sent the frame.
An example of this is if a group of amateurs are in a round-table discussion about packet radio, they could put PACKET in the destination address, so they would receive frames only from others in the same discussion.
www.packet-radio-martinique.net /ax25v2e.html   (8470 words)

  
 APRS FAQ
This ISS packet operation joins the constellation of other AX.25 1200 baud packet digipeaters such as PCSAT-1, ANDE, and RAFT and also at 9660 baud, ECHO (AO-51) currently on orbit.
Introduced to the manned space programs in 1990 on the Shuttle and MIR, packet radio first became operational on the present ISS on 22 Feb 2001, and operated well for over a year until it became intermittant and was replaced with the new Kenwood.
Due to the APRS potential equivalence to a HAM radio "RF INTERNET" and today's kids total familiarity with the power and fun of the internet, it was thought that letting the ISS downlink its daily position and status directly to simple ground stations at schools to kids everywhere might spark an interest in HAM Radio.
www.ew.usna.edu /~bruninga/iss-faq.html   (1612 words)

  
 Amateur Packet Radio's Maliase - Personal Reflections
He generously allows as to how packet radio could serve as a "backup" for the telephone, then goes on to explain how unlikely it is that it will be needed even for THAT purpose.
Knowing they look silly in comparasin to Amateur Packet Radio, their reaction is to constantly "run down" every aspect of packet padio and packet users, and take other, more concrete and immediate steps to wear it down and destroy it.
If you are sincerely interested in the welfare of the amateur radio digital network and it's community, please step forward to provide the leadership and direction which amateur packet radio so desperately needs at this time.
pages.sbcglobal.net /kb5iwt/mal.htm   (2114 words)

  
 W3EAX
Elementary and High Schools were encouraged to enlist the aid of local amateur radio operators to set up ground stations and participate in the SPRE experiment.
A simple amateur packet radio station could have been configured to listen to the SPRE telemetry and record the data for later study.
The data format was completely printable ASCII characters and therefore is fully compatible with all amateur packet radio equipment in common use today.
w3eax.umd.edu /spre/spre.html   (810 words)

  
 Introduction to Packet Radio by Larry Kenney, WB9LOZ   (Site not responding. Last check: 2007-10-09)
This series of eighteen articles was originally written in 1988 to appear in Nuts and Volts, the newsletter of the San Francisco Amateur Radio Club.
The author is no longer active in packet radio and is unable to provide up to date information on packet radio; however he has left this material on the Internet for access by those who might find it helpful.
The eighteen parts of this "Introduction to Packet Radio" are not copyrighted.
www.choisser.com /packet   (311 words)

  
 USPacket
SPAR, the Society for the Preservation of Amateur Radio has established a Winter Field Day event and invites all amateurs to participate.
Packet Radio: Applications for Libraries in Developing Countries
These bulletins are useful for Packet networks that are still growing, and have not yet linked up to the global digital network by developing the necessary VHF/UHF or HF links.
www.uspacket.org   (296 words)

  
 Packet Radio : Software: Packet
AGW Packet Driver - SV2AGW packet radio driver, runs TCP/IP protocol over radio, support windows 95/98/NT and several devices like baycom and, E5DXL 9600 G3RUH compatible modems, DRSI and Sound cards by SV2AGW George Rossopoulos.
Ideally it should be run under the AGW Packet engine, with the add on TCP/IP driver, it then allows for simultaneous connects via the internet and via packet radio, but it can of course be used stand alone, in which case people will be able to connect to it via the Internet.
TTYlink - TTYLink is a freeware client chat telnet application designed for packet radio and available for Windows NT 4.0 and Windows 95/98.
www.dxzone.com /catalog/Software/Packet   (1636 words)

  
 Packet Radio   (Site not responding. Last check: 2007-10-09)
Packet radio, while remarkably easy, does have its challenges.
Your Packet Companion by Steve Ford, WB8IMY publish by The American Radio Relay League, Inc., and "INTRODUCTION TO PACKET RADIO" by Larry Kenney WB9LOZ.
Here is a map of the known packet stations troughout Iowa.
www.public.iastate.edu /~mglowe/pktradio.htm   (109 words)

  
 Flex32 / Soundcard Packet for Windows
It makes amateur packet radio available to any Ham with a VHF tranciever and a soundcard-equipped computer, at little or no expense.
Some radios need more TXD than others, but they all should be set up with the shortest delay possible, for "snappy" performance on the air.
By doing this, I discovered that a radio I had been running at 300 ms "default" TXD for years was really capable of getting by with half as much delay.
www.uspacket.org /flex32/flx_32.htm   (1753 words)

  
 Packet Radio Operation in and around the TEARA Locale!   (Site not responding. Last check: 2007-10-09)
TEARA is a non-profit organization assembled to encourage the exchange of ideas and information, to foster friendship and fellowship, to keep Amateurs abreast of area "happenings", and to share and promote amateur radio with people from all walks of life.
TEARA was founded on January 10th of 1989, and has become an active and diverse Amateur Radio Club.
HF operation and contesting, DXing, home-brewing, vintage radio equipment construction and restoration, CW, VHF/UHF multimode operation, packet and computers, amateur radio classes, special events, repeaters, Field Day operation, club meetings, and more provide much activity for the newcomer and seasoned amateur alike.
www.ipass.net /~teara/packet.html   (231 words)

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