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C1572M (9/05) 41
INSTALLING OR REPLACING A CM9760-DFL DOWNFRAME LOOPING CARD
The CM9760-DFL downframe looping card is used in the last bay in a downframe configuration. Note the following:
• In a CM9760-MXB(-X), the CM9760-DFL card connects to a CM9760-VCC video input card, which is installed into the front of the matrix bay.
Up to 16 CM9760-DFL 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.
• In a CM9760-MXBL, up to 16 CM9760-DFL cards can be installed into slot positions that correspond to the video input slot positions in the
bay above. In the CM9760-MXBL, the CM9760-DFL cards do not connect to CM9760-VCC cards.
If necessary, a CM9760-DFL card can be replaced. To install or replace a CM9760-DFL card, refer to the sections that follow.
Installing a CM9760-DFL Card
NOTE: When a CM9760-DFL card is to be connected to a CM9760-VCC video input card, the CM9760-DFL card must be installed before the
associated CM9760-VCC card is installed.
To install a CM9760-DFL card, do the following:
1. Set termination jumpers JP1-JP16 (refer to Figure 24) in the proper position:
• When looping to another device is required, set the jumpers in the unterminated position (jumper positions 2 and 3). Termination must
occur at the final device.
• When looping is not required, set the jumpers in the terminated position (jumper positions 1 and 2).
Figure 24. Termination Jumpers on CM9760-DFL 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.
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.
TERMINATEDUNTERMINATED
JP1-JP16