Explain why modulation is necessary or desirable.
the modulation system is of FM
QAM is a combination of phase modulation & amplitude modulation.
Frequency modulation Phase modulation
whatbis GMSK MODULATION ?
Collector modulation is the amplitude modulation in which modulator varies the collector voltage of a transistor.
Is important to use as high a percentage modulation as possible while ensuring that overmodulation does not occur. The side bands contain the information and have maximum power at 100% modulation. And AM transmiters attempt to maintain betwen 90 and 95 percent modulation as a compromise between efficiency and the change of drifting into into overmodulation. sources page 76 second paragraph of the MODERN ELECTRONIC COMUNICATION By Jeffrey S.Beasley and Gary M.Miller
It uses the maximum power available to the transmitter and makes the signal more readable at a greater distance.
AM - Amplitude Modulation FM - Frequency Modulation
Recessive
A biologist
modulation
Frequency Modulation and Phase Modulation
frequency modulation..
due to velocity modulation density modulation occurs in TWT
The difference between frequency modulation and phase modulation is that with frequency modulation the angular frequency of the signal is modified while with the phase modulation, the phase angle of the signal is modified.
the modulation system is of FM
This is a highly technical subject. It is not possible, or desirable, to fully explain it here. Basically electromagnetic waves of the appropriate frequency are generated, these are then manipulated (called modulation) in various ways to carry information.