In amplitude modulation, modulation depth refers to the ratio of the unmodulated carrier amplitude to the amplitude deviation for which the modulated carrier wave reaches its minimum value. If this minimum value is zero, the modulation depth is 100%.
For amplitude modulation,modulation depth = (a-b)/(a+b),
wherea is the unmodulated carrier amplitude, and
b is the minimum amplitude deviation.
The modulation depth ratio is also referred to as the modulation index.
fm- frequency modulated am- amplitude modulated
In amplitude modulation, modulation depth refers to the ratio of the unmodulated carrier amplitude to the amplitude deviation for which the modulated carrier wave reaches its minimum value. If this minimum value is zero, the modulation depth is 100%.For amplitude modulation,modulation depth = (a-b)/(a+b),wherea is the unmodulated carrier amplitude, andb is the minimum amplitude deviation.The modulation depth ratio is also referred to as the modulation index.
AM = amplitude modulated. FM = frequency modulated.
a. velocity modulated tube b. frequency modulated tube c. Amplitude modulated tube d. simple triode
FM means Frequency Modulation.
It gives frequency modulated signal
am is amplitude modulation, fm, frequency modulation
For transmission through a radiowave.
amplitude modulated
Modulation index is also called as Modulation depth. The modulation index of a modulation scheme describes by how much the modulated variable of the carrier signal varies around its unmodulated level.
4
yes for transmission of the signal to take place smoothly,digital tranmission needs to be modulated over a carrier