Fluke DTX-1800, Technical Reference Handbook

Page: 238 / 398

DTX Series CableAnalyzer
Technical Reference Handbook
8-30
Setting the Reference in Loopback Mode
1 Turn on the tester and let it sit for 5 minutes. Allow
additional time if the modules have been stored above
or below ambient temperature.
2 Turn the rotary switch to SETUP; then select Fiber Loss.
3 Select Remote End Setup; then select Loopback.
4 Turn the rotary switch to SPECIAL FUNCTIONS; then
select Set Reference. If both a fiber module and a
twisted pair or coaxial adapter are attached, select
Fiber Module next.
5 Clean and inspect the connectors on the tester and test
reference cords. Connect the test reference cords as
shown on the tester.
Notes
The Set Reference screen shows reference
connections for the selected test method.
Figure 8-14 shows connections for the 1 Jumper
method.
The test reference cords in the tester’s diagrams
are numbered. If you want to meet TIA reporting
requirements, you can enter lengths for each test
reference cord number after setting the reference.
6 Press
P
.
7 The View Reference screen shows the reference values
and the date and time the reference was set.
8 Press
K
OK.
9 The View Connections screen shows the test
connections for the selected test method.
10 To enter test reference cord lengths to meet TIA
reporting requirements, press
J
Patch Lengths.
11 On the Patch Lengths screen, enter the lengths of the
test reference cords. Press
N
when you are done.
W
Caution
Do not disconnect the test reference cords from
the tester’s output after setting the reference. If
you do, you must set the reference again to
ensure valid measurements.