16
TS54TDR PRO Test Set
Users Guide
Using the TDR
The TDR lets you measure the length of cables and the
distance to the first open or short on cables as long as
3,000 ft (914 m). See “"Time Domain Reflectometry
(TDR) Technology" on page 23 for information on how
the TDR operates.
Note
The TDR operates only on cables that have two
conductors.
To use the TDR:
1
Optional: Change the length units, turn on the
Line Verification function, and set the velocity of
propagation to the correct value for the cable. See
"How to Change the Length Units", "Line
Verification", and “"VOP" below.
2
Press Q.
3
Connect the test leads to the cable.
4
Press t.
Below are examples of TDR test results:
How to Change the Length Units
The TDR shows length measurements in feet or meters.
To change the unit of measurement:
1
Press Q.
2
Press M, press C to put the flashing cursor next
to
TDR, then press M again.
3
Press D to put the flashing cursor next to
Units, then press M.
4
Press L or R to select feet (ft) or meters (m).
5
To save your selection before you exit or go back
to the main menu, press
M. The display shows
Saved.
To go back to the previous menu, press Q. Or,
press
C or D until Back shows, then press
M.
Line Verification
The Line Verification function does tests for data and
voltage on the line when you press t. If the test set
senses data or voltage, it gives these responses:
•
Data Detect LOCK OUT: There is data on
the line.
•
If there is voltage on the line, but no dial tone, the
display shows a voltage measurement and the test
set dials the ANAC number.
•
Active Telephone Line: There is a dial
tone on the line and there is no ANAC number
stored in memory location 9.
•
If there is a dial tone on the line and an ANAC
number in memory location 9, the test set
automatically dials the ANAC number and shows
the telephone number for the line. This helps you
identify the line so that you can make it inactive
before you do the TDR test again. Or, the number
can show you that you are connected to the
wrong line.
If Line Verification is off, and there is data or voltage on
the line, the display shows
TDR Voltage Detect
Lockout
.
TDR
Results
Short at
1267
ft
There is a short across the two
conductors 1267 feet from the test
set.
TDR
Results
Open at
2433
ft
The cable is 2433 feet long, or
there is an open in one or both of
the conductors 2433 feet from the
test set.
TDR
Voltage
Detect
Lockout
There is data or voltage on the
line. The TDR does not operate on
an active line.
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