In each of the following exercises, select the ONE answer that BEST
completes the statement or answers the question.
The preferred method for making envelope-delay-distortion test is the
end-to-end with reference-return because this method
eliminates the delay in the auxiliary line.
allows the use of a low-quality auxiliary line.
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?
Two order wires and one auxiliary line
Two auxiliary lines and two order wires
One auxiliary line and one voice order wire
One voice order wire and two auxiliary lines
The receiving TS-2669/GCM compares two modulation envelopes to
determine delay time.
The comparison is made between modulation
envelopes developed from
the received line signal and a locally generated carrier in the
receiving test set.
two received line signals, one traveling the line under test and
the other traveling the auxiliary line.
transmitting test set.
the received line signal together with the auxiliary line signal
returning to the receiving set by way of the line under test.