Fluke DTX-1800, Техническое справочное руководство, Страница: 230 / 398

DTX Series CableAnalyzer
Technical Reference Handbook
8-22
Testing the Test Reference Cords in Smart Remote
Mode
W
Caution
If you disconnected the test reference cords from
the tester’s or smart remote’s output, you must
set the reference again to ensure valid
measurements.
12 Disconnect the test reference cords from the INPUT
ports on the tester and smart remote.
13 Make the connections shown in Figure 8-10.
14 Turn the rotary switch to AUTOTEST, then press
P
.
15 Press
H
to see the test results. The results for each
fiber (Input Fiber and Output Fiber) must be no more
than these limits:
W
Caution
An overall result of PASS does not show that
the test reference cords are good. You must
compare the loss to the limits given here to
make sure the cords are good.
Multimode test reference cord:
850 nm: 0.11 dB or less
1300 nm: 0.10 dB or less
(The limits are different because fiber has more loss at
850 nm than at 1300 nm.)
Singlemode test reference cord:
0.20 dB or less for 1310 nm and 1550 nm
16 If a result is more than the limit shown above, use the
procedure given in Appendix A to test the cords in the
path that failed (Input Fiber or Output Fiber). When
you have good test reference cords, set the reference
and do these steps (12 through 16) again before you
test a fiber link.
17 Save the test results to show that you used good test
reference cords to test the link.
Note
Fluke Networks recommends that you use this
procedure to make sure your test reference cords
are good before you test each fiber link.