Solar Terrestrial Data |
A Look At Ham Radio
By JM Anderson
Ham radio is often referred to as amateur radio and is a hobby that is enjoyed by millions of individuals across the globe. A ham radio operator uses a two-way radio to broadcast with other amateurs for the purpose of entertainment, public service or other venture.
The use of ham radio may actually help to save lives as operators often support the local community with emergency and disaster communications.
On a recreational basis, ham radio can help to increase an individual’s self awareness of electronics, the operations of radio and communication. In addition, ham radio is often used to showcase entertainment for listeners and may even help to launch a new career for an amateur.
Slow-Scan Television (SSTV)
For SSTV to work, an image is "broken" into lines, composed of dots of colour and light intensity known as pixels. Each pixel is given a specific audio frequency ( that modulates the carrier) depending on its brightness. In a colour image, each of the primary colours, red green and blue are analysed for brightness. The lines of a picture are scanned from left to right. The modulating frequency varies between 1500Hz and 2300 Hz. There are a number of modes used for SSTV
|
KG-UVD1P U.V Dual Band Multifunction Two-way Radio
Dual Band Dual Frequency Speedy switch on Work Mode P Version: Upgrade Function
Work Mode: UV, V-U, V-V, U-U Can be set freely
|
SSTV is a mode that uses a computer and an amateur radio transceiver to send and receive still images over radio. SSTV was originally an analogue mode based on Frequency Modulation (FM). Digital SSTV has become possible with little trouble in recent times with the use of Digital Radio Mondiale (DRM). Despite the name "television", SSTV cannot send or receive moving pictures; it is more akin to sending a FAX.
My Rig has arrived :)