4-20 FlexNet
®
700 Series Line Extender Rev F
4
Installing Diplex Filters (E729B Only)
E729B line extenders require the installation of diplex filters. Diplex filters are not provided with return
upgrade kits and must be purchased separately. Contact your C-COR sales representative for details.
➤ To install diplex filters
1. Referring to Figure 4.9, locate the two capacitors and one inductor installed at each diplex
filter location:
■ Input Diplex Filter location: C55, L19, and C54
■ Output Diplex Filter location: C59, L22, and C60
2. Carefully cut away these capacitors and inductors. Do not disturb or remove any other
components.
3. Orient the diplex filters so that their pins align with receptacles on the module motherboard.
Firmly press the diplex filters down onto the motherboard.
4. Refer to Completing the Installation on page 4-21.
Note: Installing diplex filters without realigning the E7 Line Extender may degrade signal
quality. Diplex filters add insertion loss, which decreases spacing. Installing diplex filters
may also cause bandedge rolloff and degrade return loss at input and output ports. E7
Line Extender realignment is required after installing diplex filters to meet factory
specifications and to prevent these problems. Contact C-COR Repair Services for more
information.
CAUTION: When installing diplex filters, do not disturb any components on the diplex
filter circuit board.
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