Chapter 2: Configuring and Connecting SC48
11
FOH Inputs and Outputs
The FOH I/O section provides connectors and controls for Talkback, 2-Track, Pro Tools and other sources and destinations used
at the mix position, as explained in the following sections.
Talkback
The Talkback Mic connector and controls allow connection of
a microphone for communicating to stage or through the
Mains. The Talkback Mic input is a female XLR connector. The
Talkback input has adjustable gain and swit15V
phantom power.
To connect a mic for Talkback:
Plug a dynamic or condenser talkback microphone into the
back panel Talkback connector.
To adjust Talkback Gain:
Turn the back panel Gain knob (or adjust the on-screen
Talkback level control in the Options > Misc page).
To enable or disable phantom power on the Talkback input:
Slide the +15V switch to the right “on” position
2-Track Digital Inputs and Outputs
These 2-Track digital connections are used for input and out-
put of digital audio material. The stereo AES/EBU connectors
support 24-bit, 48 kHz digital signals. Input signals with other
sample rates are sample-rate converted to 48 kHz.
2-Track Analog Inputs and Outputs
These 2-Track analog connections are used for input and out-
put of analog audio material. These are balanced 1/4-inch TRS
connectors.
1394 (FWx)
This Firewire port is for integrated Pro Tools recording and
playback with VENUE FWx. FWx provides 18 channels of I/O
directly to a compatible Pro Tools LE system.
For more information, see Chapter 30, “FWx.”
Connecting Synchronization, Control,
and Lights
SC48 provides the following connectors for synchronization,
control, and illumination.
Word Clock
To sync an external digital device to SC48 Word Clock Out:
Connect the Word Clock Out on the SC48 back panel to the
corresponding digital device. Set the external device to slave
to the incoming word clock signal.
MIDI
These MIDI In and Out Ports provide 16 channels of MIDI in-
put and 16 channels of MIDI output to the system. The
MIDI I/O ports are used in sending and receiving Snapshot
MIDI messages, and in receiving MIDI Time Code from
external devices.
To make MIDI connections to SC48:
Connect a compatible MIDI device to the MIDI In and MIDI
Out ports.
Figure 6. FOH connectors and controls
Word Clock
Footswitch
Talkback
1394
FWx
GPI
MIDI
2-Tr
AES
2-Tr
Analog
Gain
Input
15V
for ProTools LE
Do not connect an intercom system directly to the Talkback
input, as some intercom systems use a signalling voltage
which can damage the SC48 input card.
Using word clock from SC48 to clock an external device
BNC
SC48 (back)
Word Clock Out
Set device to slave to
incoming Word Clock
External digital device
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