Chapter 2: Hardware Overview and Stand-Alone Operation 11
Output Trims 1–8
The output trims are used to individually calibrate
each channel’s output and send level.
The output trims are factory-calibrated so that the
clip point of the PRE output amplifier matches the
factory-set clip point of the HD I/O and 192 I/O
analog input. The PRE’s output level is –6 dBu be-
low its maximum output of +28 dBu (+22 dBu). If
you do not intend to use a HD I/O or 192 I/O, you
should turn the trims all the way up (clockwise) to
allow for maximum signal output (+28 dBu) and
maximum performance.
MIDI In/Out/Thru Connectors
The MIDI connectors on PRE accept standard
5-pin MIDI cables.
The MIDI In connector accepts MIDI input for re-
mote control of PRE (for example, from the MIDI
Out of a MIDI interface in a Pro Tools
system).
The MIDI Out connector sends MIDI data out of
the PRE to the MIDI input of a Pro Tools system,
or another PRE. To daisy-chain multiple PREs,
connect the MIDI Out of one PRE to the MIDI In
of the next PRE, and so on. You will also need to
set each unit to a unique MIDI channel number (re-
fer to “MIDI Connections” on page 16).
The MIDI Thru connector is not used for Pro Tools
remote control.
Oscillator (OSC) Output
This is a balanced 1/4-inch TRS jack that outputs a
fixed oscillator signal (+4 dBu reference signal at
approximately 1 kHz) for calibrating the inputs of
gear not connected through the DB-25 output. For
more information, see “OSC (Oscillator) Switch
and LED” on page 6.
AC Power
This connector accepts a standard AC power cable
(included). PRE is auto power-selecting (100V to
240V) and will automatically work with a standard
modular cable to connect to AC power receptacles
in any country.
Power Up Defaults
When you first power on PRE, it has the following
settings.
User Settings Stored in Memory
When PRE is powered down, it remembers its last
settings. When the unit is powered back on, the last
settings will be intact.
The Send jacks and the DB-25 connector
both use the output trims for adjustment. Cal-
ibrating a DB-25 output will affect the Send
output level as well.
Power Up Defaults
Function Status
Operation
Mode
Stand-alone (Remote “Lock-Out”
LED off)
Peak Hold Off
OSC Off
Shift Off
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