Various Modes Of Transmission
As mentioned, hams use various modes of transmission to communicate.
The most common mode of transmission is via voice. Frequency modulation (FM) offers high quality audio, and others, whereas single sideband (SSB) – though has less audio quality – offers more reliable communications, which is often preferred for communication across long distances, where signals can be marginal and bandwidth may be restricted.
Another method is radiotelegraphy, which uses Morse code. Left over from the earliest days of radio, some hams still use and enjoy this form of transmission, which is also known as “CW” from “continuous wave”.
Personal computers, employing protocols such as TCP/IP is another popular method of broadcasting radioteletype communication.
By adapting consumer video electronics (camcorders / video cards) in PCs, hobbyists have created a new, popular form of broadcasting via scan amateur television.
Radio waves are transmitted via communication satellites (known as OSCARs which stands for Orbiting Satellite Carrying Amateur Radio), hand-held transceivers and even the factory “rubber duck” antenna. As well, hams use the moon, the aurora borealis, and the ionized trails of meteors for reflectors of radio waves. Sometimes, hobbyists also make contact with the International Space Station (ISS), since many astronauts and cosmonauts are licensed as amateur radio operators.
Call Signs
Every ham has a unique call sign, which is used to legally identify the operator or station during radio communications. In some places, an operator may select a “vanity” call sign, as long as they conform with the issuing government’s structure and allocation that’s used for Amateur Radio call signs – in some jurisdictions, there’s a fee to be paid for vanity signs (the US), but not so in other places (the UK).
The general convention of call sign structure includes the following coded information, which is broken down into three main parts:
1. The first part indicates the country from where the call sign originates and might also indicate the license class.
2. The second part gives the subdivision of the country or territory that’s indicated in the first part
3. The last part is unique to the license holder, identifying that holder exclusively.
Oasis Moving and Storage do not use HAM radio as part of business, although larger trucking companies for shipment may.