7. An ideal telephone pair has a "flat" amplitude-frequency response.
This
means that the
a. loss increases with a rise in frequency.
b. line has no loss anywhere along its length.
c. loss is constant over a specified band of frequencies.
d. amplitude variation is proportional to the change in frequency.
SITUATION
Assume that you have been directed by your station chief to determine the
envelope-delay characteristics of circuits A and B, and to equalize them if
necessary. Upon investigation, you find both circuits have identical envelope-
delay characteristics like the uncorrected circuit curve in figure 4-7.
Exercises 8 through 11 are based on this situation.
Figure 4-7.
Delay equalized circuit characteristics.
8. Two equal delays of the uncorrected circuit occur at approximately the
frequencies of
a. 300 and 1,000 Hz.
c. 1,000 and 2,000 Hz.
b. 300 and 3,000 Hz.
d. 2,000 and 3,000 Hz.
56
Previous Page
