Apollo Hardware Manual
Rear Panel
16
Apollo’s termination switch should only be engaged when Apollo is set to sync to external word clock and it is
the last device at the receiving end of a word clock cable. For example, if Apollo is the last “slave” unit at the
end of a clock chain (when Apollo’s word clock out port is not used), termination should be active.
Note: For more information about clocking, see “Digital Clocking Basics” on page 27.
Host I/O
Important: Connect only one Apollo FireWire or Thunderbolt port to the host computer.
(11) FireWire 800 Ports
Apollo uses FireWire to communicate with the host computer system when the Thunderbolt Option Card is not in
use. When Apollo is properly connected and configured, the UAD Link LED (#16 on front panel) is solid green.
Apollo has two FireWire 800 ports. Only one port is used to connect to the host computer; the second port can be
used for daisy-chaining multiple FireWire devices such as hard drives or UAD-2 Satellite. For more FireWire
information and recommended interconnections, see “FireWire Basics” on page 24.
Note: Apollo cannot be bus powered and it does not supply bus power from its FireWire ports to other devices.
(12) Thunderbolt Expansion Bay
This expansion bay is where the Universal Audio Thunderbolt Option Card is installed, providing access to all of
Apollo’s features and functionality via Thunderbolt enabled computers.
Refer to the documentation included in the Thunderbolt Option Card package for complete details about
installation, configuration, and use of Thunderbolt with Apollo.
