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Upgrades and Maintenance, cont'd
3.
Figure 6-17 — Audio output card jumpers
4.
5.
Installing the I/O card
N The I/O cards are hot-swappable. You do not need to power down the switcher to
Install I/O cards as follows:
1.
2.
C
3.
4.
5.
6.
6-20
Matrix 12800 Switchers • Upgrades and Maintenance
Locate the jumper block that corresponds to the output to be set (figure 6-17).
JMP1 sets the gain for the first audio output associated with that card, JPM2
for the second audio output, and so on.
Install a jumper across the block to set the -6 dB (unbalanced), 0 dB (balanced)
gain level.
Remove the jumper to set the 0 dB (unbalanced), 6 dB (balanced) level
(default).
Reinstall the audio card. See
install an I/O card.
If necessary, open the front door.
If necessary, turn the left and right knurled knobs on the I/O cardcage door
¼-turn counterclockwise. Lower the door.
Do not touch the electronic components or the connectors on the backplane
or on the circuit cards without being electrically grounded. Handle circuit
cards by their edges only. ESD can damage ICs, even if you cannot feel,
see, or hear it.
Orient the card to be installed so that the LEDs on the card are to your left
(figure 6-13 through figure 6-15).
Identify the correct location for the card. Align the card with the top and
bottom cardcage guides. Gently slide the card into the cardcage until the card
meets resistance.
Hook the outer edge of the ejector levers behind the leading edge of the
cardcage enclosure frame and gently pivot the ejector levers in and toward the
center of the card to seat the card in the backplane.
If the card installed is a replacement for a sync input card, set the sync
termination DIP switches on the rear edge of the card to the same setting as
the card that was removed from this location.
"Installing the I/O
card", below.
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