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C1572M (9/05) 39
INSTALLING OR REPLACING A CM9760-DFC DOWNFRAME CARD
The CM9760-DFC card is installed in every bay between the first and last bays in a downframe configuration. The card can also be used in the
last bay if looping is not required. Up to 16 CM9760-DFC cards can be installed into 16 possible slot positions that are associated with the slot
positions of the corresponding CM9760-VCC cards to be installed. If necessary, a CM9760-DFC card can be replaced. To install or replace a
CM9760-DFC card, refer to the sections that follow.
Installing a CM9760-DFC Card
NOTE: A CM9760-DFC card must be installed before the associated CM9760-VCC video input card is installed.
To install a CM9760-DFC card, do the following:
1. Set termination jumpers JP1-JP16 (refer to Figure 22) in the proper position:
• When CM9760-DFC cards are to be installed in intermediate bays, set the jumpers in the unterminated position (jumper positions
2 and 3).
• When CM9760-DFC cards are to be installed in the last bay, set the jumpers in the terminated position (jumper positions 1 and 2).
Figure 22. Termination Jumpers on CM9760-DFC Downframe Card
2. Locate the desired slot position at the rear of the bay.
3. Remove the blank cover plate by loosening the screw at the top and bottom of the plate.
4. Slide the new card into the card guides (refer to Figure 23).
WARNINGS:
• Rear panel card installation should be performed by qualified personnel only.
• Electrostatic discharge (ESD) precautions must be observed when installing a rear panel card. Always wear a grounding strap
connected to an approved grounding source when working on or near exposed electronic equipment.
JP
1
JP
16
UNTERMINATED
TERMINATED
3
2
1