SMATV BASIC CONCEPTS
from the tv camera you get three basic signals:
r (red), g (green), b (blue).
with these three signals a pal system will generate three basic composite signals which will transmit the video information:
these three basic signals will be amplitude modulated with a supressed carrier.
the baseband of the luminance signal and both those from the chrominance signals will be quadrature modulated at a center frequency of 4,43 mhz.
in the radio frequency field, to simplify the use of units, we usually work with db units.
the voltage is measured in
dbĀµv = 20 log (volt/ 1 Āµv)
for 1 volt = 20 log (1000000/ 1) = 120 dbĀµv