Version 1.0.6
1
1
G
ENERAL
D
ESCRIPTION
The SR-101 Signal Receiver is a multipurpose signal receiver used to monitor signals on twisted pair telephone
lines. The SR-101 is compatible with the DAP-125 differential amplified probe, DHC-124 differential hand-coil
sensor, and other layup stick sensors used for aerial fault locating.
This manual applies to firmware versions 2.14 and higher.
1.1
F
EATURES
The features of the SR-101 Signal Receiver include:
•
Locating resistive faults in Aerial Cables or splice cases
•
Monitoring for Simplex and TriPlex tones during Cable Transfers/Restoration
•
Identifying DSL presence on cable pairs
•
Six standard frequencies: 145Hz, 335Hz, 577Hz, 987Hz, 2KHz, and 4KHz.
•
Ground, short, cross, and split fault location.
•
Simple technician interface and operation.
•
Rechargeable internal battery
1.2
C
OMPATIBILITY
The SR-101 along with the DHC-124 hand coil and DAP-125 probe are compatible with the ST-101 Cable
Fault Locator Transmitter for locating pair shorts, crosses, splits, and ground faults.
1.3
H
OW
F
AULT
L
OCATING
W
ORKS
The SR-101 helps locate faults by receiving a signal applied to the faulted pair allowing the technician to
trace the current flow. The current flowing in the pair causes a signal to be radiated. The receiver is highly
sensitive and tuned to the same frequency as the signal source. The technician monitors the received
signal strength to locate problems.
The SR-101 features a scrolling signal strength display and audible signal strength indication. The display
clearly shows the changes in signal strength as the technician moves the probe along the cable path. The
signal may increase and peak, dip, increase and remain higher, or decrease and remain lower depending
on the type of fault, frequency used, and location of the signal source. The gain (sensitivity) of the receiver
can be adjusted as needed for the best signal indication. The audible feature allows the technician to
hear changes as the signal becomes stronger or weaker.
This manual describes the setup and the analysis of the display for the various faults to be located. It is
important that the technician setup the system as described to obtain reliable results. In all cases, the
system will need a complete circuit for the current to flow. This assures a current flow and greater
radiated signal.