User Manual

Apollo FireWire Hardware Manual Rear Panel
16
Digital I/O
(5) Power Input
The included external power supply plugs into this 4-pin locking XLR jack. To eliminate risk of circuit damage,
connect only the factory-supplied power supply. Use the Power switch on the front panel to power the unit on
and off.
Important: Do not disconnect the power supply while Apollo is in use, and confirm the Power switch is in the
“off” position before connecting or disconnecting the power supply.
(6) ADAT S/MUX Optical Ports
These ports use the ADAT Lightpipe Optical Interface protocol for interconnecting with other audio hardware
devices in the digital domain. Two ADAT inputs and two ADAT outputs are provided, routing a total of eight
channels of digital audio. The channels routed by these ports depend on the current system sample rate.
At sample rates of 44.1 kHz and 48 kHz, the original ADAT protocol is used, and eight audio channels are routed
on one ADAT port. At higher sample rates, industry standard S/MUX is used to maintain high-resolution
transfers.
Important: To utilize all eight channels with the optical ports at sample rates of 88.2 kHz and above, ADAT
ports 1 & 2 must both be connected to the other device, and the other device must also support the ADAT
S/MUX protocol.
The following behaviors apply to the ADAT ports:
• At sample rates of 44.1 kHz and 48 kHz, port 1 supports eight channels of I/O. Output 2 mirrors
output 1, and input 2 is disabled.
• At sample rates of 88.2 kHz and 96 kHz, up to four channels of audio is routed per port (eight channels
total, when both ports are used).
• At sample rates of 176.4 kHz and 192 kHz, up to two channels of audio is routed per port (four
channels total, when both ports are used). Only four ADAT channels are supported at 176.4 kHz and
192 kHz.