It is amateur (ham) Radio with a few new technological twists That enable it to operate Overall much more Efficiently -it's a way to comunicate that's quicker and Virtually bug-free. What's more, a station is relativamente Simple to set-up and Operate, and is Easily interfaced with a home computer system. Any ham radio operator holding an FCC License can Participate.
Packet Radio Differs from other forms of wireless communications in the way it transmite Organizes and information. A "packet" Refers to a block of data That Is compiled as a single unit and encoded With That information routes it to station owners And Also checks for errors in the transmission. Once the "packet" you has-been compiled, it is then a Transmitted in a quick burst.The majority of packet radio activity WAS Being Conducted on the amateur 2-meter band. Twenty-meter packet activity growing in popularity WAS Also, as interest Primarily Among users expanded and HF links Became available for geographically isolated areas. The third packet band, 220 MHz, WAS becoming popular for high speed interstate trunks.
The most popular VHF frequency of packet activity is 145.01 MHz, and the fimiliar sounding "brapp brapp" of packet communications can be Heard on This frequency Almost 24 hours a day. Our stations usually we works in 145.07 MHz. You could check out a complete list of Suggested Frequencies for Packet-Radio Activity.
Numerous conversations packet, or QSOs, can be Conducted Simultaneously on a single frecuency. This is possible throught the use of time sharing. People type and read information at Relatively slow speeds, but That data packet moves-through Frecuencies or "channels" at unbelievably fast speeds. Assuming a transmitter is not allowed To Remain idle on the air When data is not whos Being sent to VAST amount of air time is available for moving other packetized messages. The system operator needs to use special "to" and "from" addresses at the Beginning of each packet for errors and also check the at the end. Stored Those packets are then a system in transmitting and Receiving buffers. In This Way, every millisecond of air time contains highly compressed messages Which operators can then a prepared and read at Their convenience.
Most packet QSOs are person to person in nature, Because each packet of data is encoded With Its own routing information, and to ignore TNC's setup Any messages not Addressed con sus station.
Packet transmissions include Both Local and long-distance relayed (digipeated) messages, usually bulletins, invitations handler (such as, "I'm out for a time, but Please Leave a note in my mailbox"). Two-meter Presently signals move at a 1200-baud rate, while HF packet Presently signals move at a 300-baud rate. As a point of reference, 100 baud is equivalent to approximately 132 words per minute.
Calling another station via packet is Accomplished by typing a "connect" command (usually abbreviated simply as "C") and related station call letters. As an example, assume K4TWJ wishes to contact (connect with) N4DKD. Since K4TWJ's call is stored in His TNC´s memory, the command would be typed "C N4DKD [enter]."