Version 1.0.6
9
6.2.1
Using TriPlex Tone
TriPlex tone has less coupling to adjacent pairs and requires a different technique. Start the search using Simplex
tone to identify the group. Simplex tone can also be used to identify the most likely pairs. TriPlex is then used to
isolate the correct pair. This technique reduces the time searching the cable. A conventional probe can also be
used to locate TriPlex as long as the twist is not too tight or there is some separation between the Tip and Ring.
6.2.2
Confirming Identification with the DAP-125
The DAP-125 can usually be used to make a positive identification without the need to short the pair. Place one
side of the tip against the Tip and then against the Ring and note the signal level on the D-105 or SR-101
receiver. A significant increase in signal level when the tip is placed between the Tip and Ring confirms both Tip
and Ring have been found.
7
D
ETECTING
DSL
The SR-101 monitors a frequency or group of frequencies to determine signal level, and produces an audio
sound in the speaker to indicate digital data transmission.
7.1
F
REQUENCY
S
CAN
The DSL Frequency Mode scans the selected frequency range to indicate signal or noise level. The range is
selectable and displayed at the bottom of the graph. The graph vertical column on the left is the relative dB level
of the signal.
Cursor Mode can be selected and the scanning stops allowing the technician to select specific frequencies. The
frequency and dB level are shown at the top of the LCD graph. The received signal can be heard from the
speaker or a connected earphone.
7.2
C
IRCUIT
ID
The Circuit ID function scans a number of frequencies to determine the type of DSL signal on the pair if one is
present. The types of DSL detected are HDSL, T1, ADSL, or VDSL. The indication xxDSL is displayed when an
unknown DSL type is detected.