A demonstration of Digital Communication Technologies was organised at RAJ486. Echolink, ISSTV and other Digital Communication modes were among the those Amateur Radio communication technologies that were demonstrated to K.H.S.GANGARAJU. But Not now Becoz i m not a License Holder when i got License from Ministry of Communications Then after I will Do this........!

HF-BBS -2000 SYSTEM

BBS that provides for HF to HF, HF to VHF text message transfer as well as HF / VHF to Internet E-Mail transfer It uses Pactor 1  & 2 for semi automatic HF Operations.

 HF BBS Service that allows you to pickup your mail anywhere in the world.

 It has the backbone network on the Internet.

 Email transfer, position reporting (GPS & GIS), weather and bulletin services, and emergency communications are now available to the amateur radio community by linking radio to the Internet.

q       Allows all participating winlink mail box operations to share their message databases.

q       Utilizes enabling technologies and sound operating practices to provide a full-featured radio digital message transfer system, worldwide.

q       Provides mobile user, whether on the high seas, jungles of a remote region, other helpful material whenever or wherever they need it. 

q       The ability to use these facilities is especially valuable in an emergency when local  communications is disrupted and where accuracy of information is paramount.

Slow Scan Television

Think of all the methods hams use to communicate with each other. The short list would include speech, data and Morse code. Did you forget images? At 420 MHzand up, hams routinely exchange live, full-motion video. It’s called fast-scan television (FSTV)—the same TV you’re accustomed to seeing at home. FSTV is a fun mode, but the transmitted range is limited to a few hundred miles under the best conditions. In addition, special transmitters and receivers are required. But what if you wanted to share images over thousands of miles? You could take a fixed (non moving) image and slowly scan it line by line, converting the color and brightness variations into audio tones. Feed the audio tones to an ordinary SSB voice trans-ceiver and you can send this information almost anywhere in the world. On the receiving end, the audio tones are translated back into an image on a computer screen. Hams call this technique slow-scan television (SSTV). Although it has neither the move-ment or the high resolution of FSTV, the advantage of SSTV isthat you can send pictures over great distances without relaying devices or special transmitting gear by using the propagation char-acteristic of the high-frequency bands. Thanks to the proliferation of personal computers and soundcards, it has never been easier to enter the world of SSTV. Most SSTV activity takes place on 20 meters, but you’ll find it on other bands as well. Hams licensed as Technicians should note that SSTV can be used on VHF, too. You’ll find activity on 6 meters from time to time, and a few amateurs have even swapped SSTV images via satellite!