Chapter 1: Introduction
3
Recommended Ordering of Interfaces
If your setup includes different types of audio
Interfaces, install them in the following order to
ensure best possible clock and synchronization
to your system:
1
888/24 I/O: Install as the primary audio inter-
face, it provides the highest fidelity clock source
for your system.
2
882/20 I/O, 1622 I/O: Use as “secondary” in-
terfaces.
3
ADAT Bridge I/O: Should not be used as the
primary audio interface in expanded systems,
with the exception of certain setups that present
unique clock and sync requirements. Refer to
the
ADAT Bridge I/O User’s Guide
for details.
Using Expansion Chassis
Expansion chassis consist of a chassis, providing
additional PCI slots for your Digidesign cards; a
host card, installed in your computer; a control-
ler card, installed in the chassis; and an expan-
sion chassis cable that connects the host card to
the controller card.
13-slot expansion chassis support up to ten
Digidesign cards (which can include a maxi-
mum of seven MIX Core and Farm cards). 7-slot
chassis support up to seven cards.
Digidesign TDM Ribbon Cables
When using an expansion chassis, you will need
to purchase a Digidesign TDM ribbon cable to
connect the TDM cards in the chassis. TDM ca-
bles are available with three, five, eight, and ten
nodes. Contact your Digidesign dealer or local
Digidesign office to order the appropriate TDM
cable.
Powering Up Expansion Chassis
Make sure to have the expansion chassis cable
connected to both the expansion chassis and
the computer before powering up. If the cable
becomes disconnected from the computer while
the system is powered on, shut down power to
both the expansion chassis and the computer
before reconnecting.
When powering up, turn on the expansion
chassis before the computer, and turn it off be-
fore powering down the computer. Do not leave
the chassis powered on when the computer has
been powered off.
Some newer expansion chassis have a built-
in controller card that does not need to be
installed.
6-foot expansion chassis cables are not sup-
ported.
Before you connect your expansion chassis,
or install cards in it, make sure to turn off
both the chassis and your computer.
When using an expansion chassis with a
Pro Tools 24 MIX system, the chassis must
have a 3.3 volt power supply.
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