Lexicon OMEGA - MANUAL 2 Owner's Manual page 11

OMEGA
™
MIC 1-2 INPUTS
These balanced XLR inputs feature high quality dbx
designed specifically for low-impedance professional microphones. The input gain is
adjusted using the Mic 1-2 knobs on the front panel respectively, with 50 dB of gain at
the maximum setting.
-20dB PAD
The -20dB pad is a resistive attenuator that drops the level coming from the mic input
jacks. Press this switch in to prevent overload of the preamp when incoming signals
are too hot to avoid clipping, even when the front panel control is set to minimum.
Normally, this will only happen if you have plugged a line-level input into the Mic In
jack. When the -20dB switch is in, the XLR input can handle a maximum input of
+18 dBu, compared to a maximum +22 dBu at any Line In jack.
INSERT 1-2
Each mic input is equipped with a TRS insert point. Inserts provide a send and return
of the input channel's signal directly after the mic preamp and before the A/D converter.
You can insert any line level analog processor (such as a compressor or equalizer)
to pre-process the mic signal before it is recorded, using a standard "stereo splitter"
(single TRS to two TS) cable. The tip is send and the ring is return.
S/PDIF IN AND OUT
The S/PDIF in and out ports are unbalanced phono (RCA) connectors that transmit
and receive either a 16-bit or 24-bit two-channel audio stream. S/PDIF ports may
be found on many professional and consumer CD and digital audio recorders. It is
recommended to use 75-Ohm coaxial cable for S/PDIF transfers and keep the cable
length to a maximum of 10 meters to minimize interference and data dropout. The
S/PDIF output sends only the stereo signal that is returned from the computer. Thus
it is not affected by the setting of the Monitor Mix or Output Level controls.
+48v SWITCH
This enables the phantom power to the Mic 1 and Mic 2 inputs. Dynamic
microphones do not require phantom power to operate, but are not harmed by
it. Most condenser microphones do require phantom power to operate. If you are
unsure about the phantom power requirements for your microphone, consult your
microphone's documentation or contact the manufacturer. This switch should be
OFF if you are connecting any line-level source to the Mic In jacks.
USB PORT
The USB Port is used to connect the Omega to your computer. A standard USB cable is
included. The Omega is compatible with USB 2.0 ports, but the USB 2.0 bus will switch
to the slower USB v1.1 speed to work with the Omega.
MIDI IN AND OUT
The MIDI jacks provide MIDI input and MIDI output to and from your computer.
Connect your MIDI keyboards, sound modules, and external controllers here.
POWER JACK
Use only the supplied PS0913-B power supply to power the Omega.
®
Silver Series™ mic preamps
The Rear Panel
IMPORTANT:
Do not plug a line
output into the MIC
IN jacks unless the
+48 V (phantom)
switch is turned OFF
to avoid damage.
IMPORTANT:
This switch should
be OFF if you are
connecting any line-
level source to the
Mic In jacks.
11