Low level and high level modulation
For low level modulation , amplifier used is
a.) Class A
b.) Class C
c.) Class A and C
d.) None of the above
Correct Answer: a) Class A
Explanation:
When the modulation takes place prior to the output element of the final stage of the amplifier, it is low level modulation. Class A amplifiers are used for this purpose.
For high level modulation , amplifier used is
a.) Class A
b.) Class C
c.) Class A and C
d.) None of the above
Correct Answer: b) Class C
Explanation:
When the modulation takes place in the final element of the final stage of the amplifier,
it is high level modulation. Class C amplifiers are used for this purpose.
Discussion
- RE: Low level and high level modulation -Garry (08/05/17)
- Low level modulation is modulating an RF source at a power level of mWs. This has to be increased to the transmission level power by amplifiers, which may have to linear depending on the form of modulation.
High level modulation is when amplitude modulation is applied to a RF power amplifier, so the modulator has to supply half of the carrier power.
