14. A volume compandor reacts more slowly than an instantaneous compandor
because, unlike the instantaneous compandor, the volume compandor is designed
to compensate for
a. intensity range.
b. individual amplitude peaks.
c. amplitude of syllabic variation.
d. frequency of syllabic variation.
15. Data communication systems use pulses similar to pulse-code modulation
(PCM). This means that when data are transmitted, the type of compandor used
must be the
a. volume.
c. modulated.
b. syllabic.
d. instantaneous.
16. The three basic parts of a volume compandor are
a. amplifier, peak clipper, and variable loss device.
b. rectifier control circuit, amplifier, and peak clipper.
a. variable loss device, rectifier control circuit, and amplifier.
d. peak clipper, variable loss device, and rectifier control circuit.
17. In the expandor unit of a compandor the control current varies the amount
of attenuation. What are the relationships among the signal, control current,
and attenuation?
a. A weak signal produces a large control current, and attenuation is
high.
b. A weak signal produces a small control current, and attenuation is
low.
c. A strong signal produces a large control current, and attenuation is
low.
d. A strong signal produces a small control current, and attenuation is
high.
18. Assume that the compression ratio in a compandor is 2:1 and
the
conmpanding range is 50 db. The intensity range entering the expandor is
a. 100 db.
c. 50 db.
b. 75 db.
d. 25 db.
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