output 1, while channels 5-8 are transmitted on ADAT output 2. 176.4kHz and 192kHz sample rates are
not supported over the ADAT interface. These outputs are active when the ADC is on.
USB Class 2 Audio Interface: USB T pe B 8 channel audio output to host computer and 2 channel input
from host computer. Use a standard USB t pe A -to- t pe B cable (included with our m108). The t pe A
connector is to be plugged in to the HOST computer and the t pe B connector to the m108 input. PCM
44.1kHz – 192kHz/24 bit is supported. Please refer to USB audio setup in Chapter 11. This jack is also
used for m108 firmware upgrades.
Option Card Dante ™ Module: This option provides the m108 with a Dante interface. Two gigabit ether-
net ports are provided for redundant Dante networks. The Dante interface provides 8 channels of out-
puts and inputs at sample rates up to 192kHz to other Dante enabled devices. Detailed instructions for
operation are in chapter 9.
Option Card Control Room Output Module: 1/4" TRS Jacks. Tip positive, Ring negative, and Sleeve
ground. Provides a single pair of balanced stereo analog speaker outputs, which connect to our stereo
monitor s stem (power amp or powered speakers). Connections are made with standard balanced TRS
cables. The output volume of this output is controlled b the Headphone volume control on the front
panel.
WORDCLOCK IN: BNC 75Ω or 47kΩ (setup menu selected). The m108 can accept a standard 5V/75Ω
word clock signal from an external clock generating unit. This might be a stand-alone clock source or via,
for example, the word clock output from our digital audio workstation. The m108 locks to the incoming
word clock with an ultra low jitter PLL. The PLL has a fast lock mode which rapidl acquires lock and then
switches to a high jitter rejections mode with a loop bandwidth of 0.5Hz. This provides exceptional jitter
rejection for the ADC and DAC sample clocks. In the event of a dropout or loss of incoming word clock
signal, the intelligent PLL will remain at the last known valid frequenc . When the signal is restored the
PLL will smoothl re-acquire lock.
WORDCLOCK OUT: BNC 75Ω. The word clock output allows the user to s nchronize other digital audio
equipment to the m108. When the menu setting "clock output" is set to external, this connector output
is a buffered cop of the signal on the word clock IN jack. This mode is useful for "dais chaining" multi-
ple m108s together in a s stem. When "clock output" is set to internal this connector outputs a buffered
cop of the internal m108 word clock. The output is buffered and is designed to drive a 75Ω line.
REMOTE – RS485 / RS422: DB9. This is a galvanicall isolated serial port for controlling the m108. With
updated firmware, the m802RCU can control the m108 allowing m108 preamplifiers to be added to an
existing m802 s stem. For wiring diagrams, see chapter 16.
MIDI IN – MIDI OUT: DB9. The m108 can be controlled directl from AVID ProTools® HD, via these jacks
and compatible AVID I/O hardware. For wiring instructions, cable diagrams, chapter 13.
ETHERNET: RJ45. This is a standard 100 Base-T Ethernet interface and is used to connect the m108 to a
TCP/IP network for the purpose of remote controlling the m108 via the standalone control app or the
built-in web browser control.
m108 Owner's Manual page 7
