A-2 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Maxiva ULX COFDM Series
A.2 Line Cutback and Flange Soldering Procedure
1. Determine the flange-face to flange-face length of the transmission line run needed.
If the run includes an elbow, see Figure A-1 to determine the elbow length.
2. Subtract twice the cutback dimension of the flange. This dimension varies with flange
manufacturer. See
Figure A-2.
3. Using one of the suggested methods for cutting the line given in Section A.3, cut the
outer conductor to the length just calculated.
4. If holes in the outer conductor are needed for directional couplers, tuning paddles, etc.
they should be added now with the holes properly deburred.
5. Using the suggested techniques for installing the flanges given in Section A.4, solder
a flange to each end of the outer conductor.
6. Measure the flange-face to flange-face dimension after soldering to confirm the prop-
er length and to determine the initial length of the inner conductor.
7. Determine the length of the inner conductor by using the flange-face to flange-face
dimension of the outer conductor and subtracting the dimension of the anchor connec
-
tor (bullet) shown in Figure A-3. This dimension determines the proper cutback of the
inner conductor for both ends of the line at the same time. do not double this dimen-
sion when subtracting from the outer conductor length.
8. Cut the inner conductor and debur the cut edges.
9. Ensure the inside of the outer conductor is clean; then insert the inner conductor. The
line is ready to install.
Figure A-1 Measurements When Elbows Are Used
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