Universal Audio UAD Manual download pdf (Page 18)

Apollo FireWire Hardware Manual Rear Panel

(10) 75 Ohm Word Clock Termination Switch

This pushbutton switch provides internal 75-ohm word clock input signal termination when required. Word

clock termination is active when the switch is engaged (depressed).

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.

Host I/O

When Apollo is properly configured and communicating with the host computer, the UAD Link LED (#16 on front

panel) is solid green.

Important: Connect only one Apollo FireWire port to the host computer.

(11) FireWire 800 Ports

FireWire is used for connecting to the host computer system when the Thunderbolt Option Card is not in use.

When FireWire is used for the host connection, the second FireWire port can be used for daisy-chaining other

FireWire devices (see the Apollo support web page for important constraints).

Although the two FireWire 800 ports are numbered, they are functionally identical and either port can be used

for FireWire connections.

For additional FireWire information and recommended interconnections, see “FireWire Basics” on page 23.

Note: Apollo cannot be bus powered and it does not supply bus power from its FireWire ports to other devices.

(12) Expansion Bay

The expansion bay is where Universal Audio’s Thunderbolt 2 Option Card (sold separately) is installed.

Thunderbolt can be used instead of FireWire when connecting to Thunderbolt-equipped Mac computers.

Note: The Expansion Bay accepts the original Thunderbolt Option Card or the newer Thunderbolt 2 Option Card.

For complete details about using Thunderbolt with Apollo, please visit:

• www.uaudio.com/support/thunderbolt

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Universal Audio UAD Manual Page 18