Analog I/O & The Ad Input Section; Ad Input Section - Yamaha DM 2000 Owner's Manual

48
Chapter 4—wAnalog I/O & the AD Input Section
4 wAnalog I/O & the AD Input Section

AD Input Section

The DM2000 features 24 AD Inputs for connecting microphone and line-level sources.
AD Inputs can be patched to Input Channels or Input Channel Insert Ins (see page 61).
They can also be patched to Output Channel Insert Ins (see page 64).
AD Input Connectors
Phantom Power
+
48V
Pad
PAD
Gain
-
16
GAIN
PEAK & SIGNAL Indicators
PEAK
SIGNAL
DM2000—Owner's Manual
AD Inputs feature balanced XLR-3-31-type connectors and balanced 1/4-inch
phone jacks, both with a nominal input range of –60 dB to +10 dB. The phone
jacks, which can also be used with unbalanced phone plugs, have priority over
the XLR-type connectors, so when a phone plug is inserted, the XLR-type con-
nector is disconnected.
AD Inputs feature switchable +48 V phantom powering for use with con-
ON
denser-type microphones and direct boxes. Phantom power is supplied to the
OFF
balanced XLR-3-31-type connector, and can be switched individually for each
AD Input.
AD Inputs feature pad switches, which attenuate input signals by 26 dB, allow-
ing the Head Amps to work with high-level signals. Pad is typically used to
26dB
attenuate "hot" signals from bass or snare drum microphones, or "hot"
line-level signals.
AD Inputs feature detented rotary gain controls with an input sensitivity of –16
dB to –60 dB, or +10 dB to –34 dB when the Pad is on. The GAIN controls
-
60 adjust the gain of the Head Amps, allowing you to optimize input signal levels
for the best signal-to-noise performance. Ideally, the GAIN control should be
set so that the signal level is relatively high, and it's okay for the PEAK indicator
to light up occasionally. If the PEAK indicator lights up often, however, you
should back off the GAIN control a little, otherwise, signal clipping may occur.
If the GAIN is set too low, the signal-to-noise performance will suffer.
These indicators are used in conjunction with the GAIN controls and PAD
switches to optimize signal levels. The SIGNAL indicator lights up when the
input signal level is 20 dB below nominal. The PEAK indicator lights up when
the input signal level is 3 dB below clipping.