18. Assume that a transmission test set uses the three weighting networks
shown in figure 1-2. If the received level at 1,000 Hz is adjusted to 0 dbm,
the weighting levels at 1,500 Hz will be approximately
F1A
144
C-message
a. -3 dbm
-12 dbm
-2 dbm
b. -8 dbm
-2 dbm
-12 dbm
c. -2 dbm
-8 dbm
-12 dbm
d. -12 dbm
-2 dbm
-8 dbm
19. The most commonly used weighting characteristic in modern telephone
equipment is C-message. Compared with F1A and 144 weightings, C-message has a
a. narrower bandpass.
b. greater loss at 1,000 Hz.
c. more uniform frequency response.
d. sharper peak response ac 1,000 Hz.
20. When a telephone line is to carry high-speed data signals, the line
circuit may have to be modified by removing
a. repeaters.
b. amplifiers.
c. attenuators.
d. loading coils.
CHECK YOUR ANSWERS WITH
LESSON
SOLUTION
SHEET
(PGS 59
and
60)
AND
MAKE
NECESSARY CORRECTIONS.
10
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