ECE Board Exam March 1996
One type of pulse communications system uses pulse that appear as a group, and which
vary in number according to the loudness of the voice. This type of pulse modulation is
called
A. pulse duration modulation
B. pulse amplitude modulation
C. pulse code modulation
D. pulse position modulation
One type of pulse communications system uses pulse that appear as a group, and which
vary in number according to the loudness of the voice. This type of pulse modulation is
called
A. pulse duration modulation
B. pulse amplitude modulation
C. pulse code modulation
D. pulse position modulation