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Apollo x8p Hardware Manual Rear Panel 27
Word Clock Out
This BNC connector transmits a standard (1x) word clock when Apollo x8p is set to use
its internal clock. The clock rate sent by this port matches the current system sample
rate, as specified within the Console application.
When Apollo x8p is set to use external word clock as its clock, Apollo x8p is a word clock
slave. If the incoming external word clock is within ±0.5% of a supported sample rate
(44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz), Word Clock Out will mirror
Word Clock In with a slight phase delay (about 40ns).
Because Apollo x8p’s word clock output is not a true mirror of the word clock input,
word clock out should not be used to daisy chain the word clock if Apollo x8p is in the
middle of the word clock chain. The correct method to connect Apollo x8p in the middle
of a word clock chain is to use a T-connector at Apollo x8p’s word clock input and leave
Apollo x8p’s word clock output unconnected (the Termination switch should not be
engaged in this scenario)
(32) Thunderbolt 3 Ports
Apollo x8p has two Thunderbolt 3 ports. One port is used to connect Apollo x8p to a
Thunderbolt 3 port on the host computer. Thunderbolt 3 peripheral devices may be
serially connected (daisy-chained) to the second Thunderbolt 3 port.
When Apollo x8p is properly communicating with the host computer via Thunderbolt, the
HOST indicator (#15) illuminates.
Note: Apollo x8p can be used with Thunderbolt 1 and Thunderbolt 2 ports on
Apple Mac computers via the Apple Thunderbolt 3 to Thunderbolt 2 Adapter.
Connections to Thunderbolt 1 or Thunderbolt 2 ports on Windows PCs are not
supported.
Thunderbolt Bus Power
Per the Thunderbolt specification, bus power is supplied to downstream (daisy-chained)
Thunderbolt peripheral devices. Apollo x8p must be powered on for the daisy-chained
peripheral to receive Thunderbolt bus power.
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