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9. Tuning Instructions
9.1 General Information
The D-183017 LC Tuning Kit
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(108 476 094) is comprised of the following:
•
Tuning Index Tool
•
Tuning Wrench
•
Singlemode Offset Tuning Jumper
•
Hard case with foam insert
•
Instruction card.
9.1.1 Tuning Index Tool
The Tuning Index Tool is used to determine which of six ferrule positions yields the lowest
insertion loss in both jumper and Behind-The-Wall (BTW) connectors. The tool is made of high
impact plastic with one fixed section and one adjustable section. These two sections are held
together by an interior coil spring that maintains an inward tension on the two sections to keep
them in a stationary position. Both sections are equipped with a test port that is used to install the
Singlemode Offset Tuning Jumper and the jumper or BTW connector to be tuned. There are six
window openings located around the rim of the fixed section. These window openings are 60
degrees apart and are used to view a white reference mark on the inner rim of the adjustable
section. Stamping beside each window provides the number of turns needed to tune the
connector ferrule of the jumper or BTW connector being tuned. The “flat” or “flats” reference in
the window stamping indicates one of the six flat positions in the hexagon handle of the Tuning
Wrench that is provided in the Tuning Kit. To move the Tuning Index Tool from its stationary
position, pull the adjustable section away from the fixed section and rotate clockwise or
counterclockwise in increments of 60 degrees.
9.1.2 Tuning Wrench
The Tuning Wrench is used to rotate the barrel/ferrule of the connector being tuned to a position
that will yield the lowest insertion loss. The Tuning Wrench is comprised of a steel shaft molded
into a plastic hexagon handle. Two keys are milled into the end of the steel shaft and these keys
are used to engage the keyways located in the barrel/ferrule of the connector being tuned. To
rotate the barrel/ferrule, you must first place
the Tuning Wrench keys in the barrel/ferrule
keyways, second press in on the Tuning Wrench until it bottoms out on the face of the connector
housing, and third turn the wrench to the desired flat. The number of flats and the direction to be
turned is obtained from the printing on the rim of the fixed section of the Tuning Index Tool [for
example, Turn 2 flats CW (clockwise) or Turn 2 flats CCW (counterclockwise)].
∗
Patents Pending.
Tuned
window
Turn 1 flat
CCW window
Turn 2 flats
CCW window
Turn 3 flats
CCW window
Turn 2 flats
CW window
Turn 1 flat
CW window
White mark on
adjustable section
Fixed
section
Adjustable
section
Test
port
Window
opening
