STUDY EXERCISES
In each of the following exercises, select the ONE answer that BEST
completes the statement or answers the question.
1.
The preferred method for making envelope-delay-distortion test is the
end-to-end with reference-return because this method
a.
is independent of the frequency used.
b.
eliminates the delay in the auxiliary line.
c.
allows the use of a low-quality auxiliary line.
d.
permits the transmitting operator to take all meter readings.
2.
What telephone lines, in addition to the line under test, are used in
performing the envelope-delay-distortion measurements by the end-to-
end with reference-return method?
a.
Two order wires and one auxiliary line
b.
Two auxiliary lines and two order wires
c.
One auxiliary line and one voice order wire
d.
One voice order wire and two auxiliary lines
3.
The receiving TS-2669/GCM compares two modulation envelopes to
determine delay time.
The comparison is made between modulation
envelopes developed from
a.
the received line signal and a locally generated carrier in the
receiving test set.
b.
two received line signals, one traveling the line under test and
the other traveling the auxiliary line.
c.
two
carrier
frequencies
developed
and
modulated
by
the
transmitting test set.
d.
the received line signal together with the auxiliary line signal
returning to the receiving set by way of the line under test.
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