Posts Tagged ‘Communication’

A two way communication is made much quicker, cheaper, and simpler with a Two Way Radio, which is a device capable of transferring as well as receiving at the same time. It works on a dual frequency system. Unlike a broadcast, it is a Transceiver. A very common example of such a device is our very own cell phone. AM (Amplitude Modulation) Radios are another example of this duplex communication, extensively used in Aircraft communications for navigating etc. FM or Frequency Modulation is used in radios, but again this is a one way communication or a ‘broadcast'.

In the same category of FM, the conventional radio types may be Family Radio Service or FRS, but in this case, FM is used for a two way communication, and not merely a Broadcast. Since it is a very low cost substitute for communication, it has gained wide popularity with Business communication also.

For communication to take place there may be ‘Simplex' or ‘Duplex' channels. The former uses a single channel for communication, whereas, on the latter, two different channels are used for communication. The Simplex radio Communication is very popular with the aircraft VHF AM and the marine radios; whereas mobile phone networks use duplex communication. A specific quality about the Duplex Communication is that it requires a proper infrastructure for its operations to take place. There may also be a Hybrid of the above two which can alternate between the two functions.

There are also analog and digital two way radios, the latter being a very complex one to handle. An example of the Digital Radio may be Motorola's MOTOTBRO, and of the analog may a simple walkie talkie used by families etc.

These days, the two way communication has gained a lot of popularity due to its cheap cost and less maintenance costs. One can use the walkie talkies very conveniently at home, to communicate with the family folks for dinner, in the garden, etc. Also, it is most widely used in office buildings, malls etc. where the area of the building is so huge that it needs many security guards, and it is a very common sight when we see Security Personnel communicating with each other over these walkie talkies. The more complex and advanced Two Way communication is used within the police services.

A very important feature of the Two Way Communication Devices is that most of them use a battery eliminator, making them a very portable device. Many new accessories have come up in the market to enhance the communication advantages in order to give the customer a better experience with the gadgets, for instance, if one has a Motorola Radio, one can always go for Motorola Radio Accessories. Two way communications is indeed a great advantage for communication.

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Ham Radio - Passion for Communication

Ham radio has a long and important history. As society and technology continue to move on to new things, a small segment continues to enjoy the hobby as well as to educate and help during disasters.

WHAT IS HAM RADIO?

Ham radio is the the term coined for amateur radio enthusiasts who learn to operate radios as a hobby or for practical use. Hams - as operators are called - can use various methods for transmitting messages including Morse code via telegraph, voice transmission via radio or messages through a computer. New methods of transmitting television allow for images to be received around the world by hams. Some hams have contributed to the development of new technologies for other uses.

The term 'ham' has unknown origin although there are several theories.

WHO USES HAM RADIO?

Ham radio operators can be anyone - doctors, homemakers, truck drivers - who enjoys communicating with new friends. Hams can talk across town or around the world.

Ham radio was used by the military in the World Wars and by ships. The well known 'SOS' is just one of the codes that operators use to relay messages to one another.

In emergencies ham radio operators volunteer to assist with transmitting messages when normal communications are unavailable.

So far, we've uncovered some interesting facts about ham radio. You may decide that the following information is even more interesting.

Hams are all over the world - even in space! While in orbit or on the space station astronauts have spoken with other operators as well as children, teachers and parents. The program is called ARISS, Amateur Radio on the International Space Station.

Hams are young and old, men and women and of every background and occupation.

WHAT DO YOU NEED TO START?

In the United States you must obtain a license from the FCC (Federal Communications Commission).

To be licensed by the FCC you must pass an exam. The exam is administered by a volunteer ham operator and you are then mailed your license. You can often find websites or groups where you can locate a tutor who will answer questions or offer instruction before you take your exam. One such resource is the ARRL website. The ARRL is the National Association for Amateur Radio and provides training and resources for getting started as well as updates and news for the ham radio community.

HOW MANY HAMS ARE THERE?

The ARRL site claims over 170,000 members. FCC licenses have been issued to over 600,000 individuals in the United States and there are over 3,000,000 hams in Japan and many more throughout the world according to statistics found at ah0a-Site.

With so many people to talk to, there are even competitions to see how far away you can transmit and many other events within the community.

The day will come when you can use something you read about here to have a beneficial impact. Then you'll be glad you took the time to learn more about ham radio.

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