Expanded Systems Guide22
Configuring the SBS 13-Slot
Expansion Chassis
System Performance and Clock Skew
To ensure the maximum track count with ex-
panded Pro Tools 24 MIX and Pro Tools 24 sys-
tems, you may need to adjust the clock skew on
the chassis host card.
This is accomplished by changing a jumper
switch on the host card. Locate the set of jumper
pins marked “J2” on the host card. If the jumper
cap spans pins 2–3, it should be moved to span
pins 1–2.
Connecting the Expansion Chassis
Before installing any of the following hardware,
turn off the expansion chassis, your computer,
and any peripherals. Leave your computer’s
power cable plugged in so the computer is
grounded.
Do not remove cards from their antistatic bags
until you have discharged static electricity by
touching a grounded object (such as the power
supply of your computer).
Install the chassis host card:
1 Install the SBS Host Card in the lowest num-
bered slot in your computer.
To locate the lowest numbered slot, refer to your
computer’s documentation, or see “Verifying
Slot Numbers in Your Computer with DigiTest”
on page 25.
2 Attach a 2- or 4-foot expansion chassis cable
to the host card. If necessary, refer to the SBS
guide for specific instructions.
3 If using a SCSI HBA, install it in the highest
numbered remaining slot in your computer.
For 9500/9600 computers, the SCSI HBA should
reside before the video card.
Install the chassis controller card:
1 Install the SBS Controller card in the Back-
plane Controller slot of the expansion chassis.
2 Attach the other end of the expansion chassis
cable to the controller card. If necessary, refer to
the SBS guide for specific instructions.
Installing the Digidesign Cards
Install the Digidesign audio cards:
1 Install the primary Core card (clock master
with primary audio interface) in the appropriate
slot of the expansion chassis:
• Macintosh 9500, G3/G4: Install in slot 2
(leave slot 1 empty).
• Macintosh 9600: Install in slot 4 (leave
slots 1–3 empty).
2 If using a Pro Tools 24 MIX system, install the
remaining cards in successive chassis slots in the
following order:
• MIX Core cards (additional)
• MIX Farm cards
• d24 cards
• MIX I/O card
• DSP Farm cards
• SampleCell cards
– or –
6-foot expansion chassis cables are not sup-
ported.
See “Example 1, SBS 13-Slot” on page 24.
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