when modulated by a 1-kHz rectangular wave. If the transmitter is to have the same
bandwidth when modulated by a 1-kHz triangular wave, it must have a deviation of 3
kHz and a modulation index of
15. When a given FM transmitter is modulated by a 1.5-kHz sine wave, the
transmitter is modulated by a rectangular pulse having a pulse repetition rate of
remains at 5 and the effective bandwidth will be
a. 24 kHz.
b. 48 kHz.
16. Assume that the preemphasis network in A of figure 1-2 is altered to have a
time constant of 75 microseconds.
The deemphasis circuit to be used in the
receiver is shown in B of figure 1-2.
circuit should be
a. 0.0015 microfarad.
b. 0.0020 microfarad.
c. 0.0100 microfarad.
d. 0.0375 microfarad.
Preemphasis and deemphasis circuits.