DigiDesign Digi 002, Getting Started

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Chapter 6: Digi 002 and Digi 002 Rack Back Panels 53
Analog Inputs
Mic Inputs 1–4
These are balanced, three-conductor XLR con-
nectors for microphone-level analog inputs.
Gain is controlled by the corresponding Input
Gain control (on the top panel of Digi 002, and
on the front panel of Digi 002 Rack).
Line/Instrument Inputs 1–4
These are balanced, 1/4-inch TRS jacks for
line-level or instrument-level analog audio in-
put connections. Operating levels for these
line/instrument inputs are fixed at +4 dBu. Gain
is controlled by the corresponding Input Gain
knob (on the top panel of Digi 002, and on the
front panel of Digi 002 Rack).
Unbalanced connections are also possible with
the use of standard 1/4-inch mono plugs.
Phantom Power
These switches apply 48V phantom power to In-
puts 1–2 and Inputs 3–4 channel pairs respec-
tively, for microphones that require phantom
power to operate.
Dynamic microphones (like a Shure SM57) do
not require phantom power to operate, but are
not harmed by it. Most
condenser microphones
(like an AKG C3000) do require phantom power
to operate. If you are not sure about the phan-
tom power requirements for your microphone,
contact the manufacturer, or read your micro-
phone’s documentation.
Analog Inputs 5–8
These are balanced, 1/4-inch TRS jacks for
line-level analog audio input connections.
Operating levels for each of these line-level in-
puts is switchable b4 dBu and –10 dBV,
using the Operating Level switches immediately
to the right of the input jacks.
While Inputs 5–8 do accept unbalanced connec-
tions, this may result in a noisier signal than a
balanced-to-balanced connection. If the devices
you are connecting to Digi 002 or Digi 002 Rack
have balanced outputs, be sure to use balanced
cables for optimal signal-to-noise performance.
Alt Source Inputs
These are unbalanced, two-conductor RCA-con-
nectors for connecting alternate audio sources
such as CD players or tape decks. The signal
from these inputs can be routed directly to the
Monitor Outputs (for monitoring) or to Inputs
7–8 (for direct input into Pro Tools) from the
top panel of Digi 002 (or the front panel of
Digi 002 Rack). Operating levels for these inputs
are fixed at –10 dBV.
Digidesign does not recommend the use of
unbalanced cables. Unbalanced connec-
tions may introduce noise into your audio
system. Whenever possible, use balanced
cables to make connections to Digi 002 and
Digi 002 Rack.
Although phantom power can be used
safely with most microphones, ribbon mi-
crophones can be damaged by it. Always
turn off phantom power and wait at least
30 seconds before connecting a ribbon mi-
crophone.