Gain, Phantom Power Supply, Phase And Attenuator - Roland VM-C7100 Owner's Manual

Chapter 5 Mixing Procedure 1 (Input Channel)

Gain, Phantom Power Supply, Phase and Attenuator

Various settings are available for the analog pre-amplifier at each channel's input
section. These include:
• Gain (not available when DIGITAL A/B is selected as the input source)
• Phantom power supply (not available when DIGITAL A/B is selected as the
input source)
• Phase inversion
• Digital attenuation level
Setting up an input channel's analog pre-amplifier
1. Press [INPUT] in the SECTION area.
2. Press [CH EDIT] for the desired channel.
3. Select the PREAMP page using the PAGE UP/PAGE DOWN buttons.
fig.05-01
4. Adjust the settings as desired.
GAIN:
PHASE:
PHANTOM
POWER SUPPLY:
ATTENUATOR:
You can also access these parameters by pressing [CH VIEW] with [CH EDIT] (p. 63).
Setting preamp gain and phantom power in PARAM VIEW on Fader mode
1. Press [PREAMP GAIN] in the PARAM VIEW on Fader area.
2. Set each channel's preamp gain using its fader. You can also set the preamp
gain for six channels at a time using the cursor and the V1 to V6 knobs.
3. Cursor to the desired channel and activate or de-activate its phantom
power using [F1] to [F6]. When a channel's phantom power is turned on,
the parameter is highlighted.
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Turn the V2 (GAIN) knob to match the pre-amp's input gain to
the output level of the connected microphone or other audio-
producing device. (+4 to -64 dB)
Press [F3] to switch the phase inversion function on or off, as
desired. When phase inversion is active, the PHASE parameter
is highlighted on the display.
Press F2 (48V) to switch between on (highlighted) and off. A
channel's phantom power supply should only be turned on
when the channel is handling a signal from a device that
requires phantom power.
Turn the V3 (ATT) knob to set the input attenuation level, from
+6 to -24 dB. Attenuation is the lowering of a signal's level.
Start by setting the attenuator to "0 dB," for no attenuation. If
distortion occurs as you boost frequencies in the signal during
equalization, adjust the ATTENUATOR setting to reduce the
signal's level until the distortion is eliminated.
Phase (p. 242)
Phantom power (p. 242)
Attenuator (p. 232)
You can jump directly to
this screen by pressing the
PREAMP GAIN STATUS
button while holding down
the channel's [CH EDIT].
There are a couple of
reasons you might want to
invert the phase of a
channel's signal. You might
want to do this when the
signals from two
microphones used on the
same instrument are
canceling each other out—
in such a case, you'll want
to invert the phase of one of
the signals. You may also
want to correct the phase of
a signal that has already
been phase-inverted due to
an error in cabling.