Operation Manual

DTX Series CableAnalyzer
Technical Reference Handbook
7-48
Using Manual OTDR Mode
Note
Typically, you should use Auto OTDR mode when
certifying cabling with the OTDR.
Manual OTDR mode lets you optimize the OTDR trace for
viewing specific events.
To select Manual OTDR mode, turn the rotary switch to
AUTOTEST, press
L Change Test; then select Manual.
Table 7-5 describes the settings you can change in manual
OTDR mode and how the settings affect the trace. You can
access these settings on the Fiber OTDR tabs in Setup.
Tip: To see the settings used for an OTDR test, press
K
View Events on the OTDR Results screen, press
L View
Details; then press
J OTDR Settings. The settings used
may be slightly different from the nominal values selected
on the OTDR tab.
Table 7-5. Manual OTDR Settings
Setting Description and Selection Guidelines
Range The range setting determines the maximum distance shown on the trace.
Auto: The tester selects the range that is nearest to, but not less than the end of the fiber. These
ranges are not limited to the fixed ranges provided.
Manual range selections: You select the range. Typically, you should select the range that is nearest
to, but not less than, the distance to the event you want to study. If the tester does not correctly
identify the end event, run the OTDR test again using the next higher range.