46
Input channel operations
Input channel operations
The principal parameters of an input channel can be operated in the CHANNEL DISPLAY screen.
fig.ScrChDispGuide.epsz
Operations in the CHANNEL DISPLAY screen
CHANNEL DISPLAY screen
21 3
4
5
6
7 10
11
12
98
13
14
Preamp
fig.ScrChPreamp.eps
Here you can make settings for the preamp of the input jack that
is patched to the channel.
+48V button
This turns the +48V phantom power on/off.
You must turn the phantom power off if you’ve connected
equipment that does not require +48V phantom power.
Mistakenly supplying phantom power to a dynamic
microphone, audio playback device, or any other device that
does not require phantom power will cause malfunctions.
Carefully read the owner’s manual for your microphone or
other device, and make sure of its specifications.
Since noise will be produced when you switch the phantom
power setting, the output of the channel whose setting you
change will be briefly muted.
PAD button
This turns the pad on/off. Turning this on will lower the input
sensitivity of the preamp by 20 dB.
Since noise will be produced when you switch the pad setting,
the output of the channel whose setting you change will be
briefly muted.
Turn the pad on if the input level is too high even when the preamp
gain is set to the minimum position.
Ø (Phase) button
This reverses the phase of the audio signal. Turning this on
will reverse the phase of the signal, and turning it off will
maintain the normal phase.
OL (Overload) indicator
This will light red when the output of the preamp exceeds
the OVER Lev setting specified in the METER SETUP popup
(p. 96).
GAIN knob
This adjusts the preamp gain in a range of -65 dBu– -10 dBu
(if PAD is on, a range of -45 dBu– +10 dBu).
The preamp gain is not a continuous control, it is digital with
stepped control. In certain situations artifact noise may occur
when changing preamp gain. This is normal.
1
1
2
3
4
5
1
2
3
4
5
For the following channels, the preamp area will show only
the Ø (phase) button:
• Channels to which no input port is patched
• Channels to which a port that has no preamp (such as
an internal port) is patched
M-480_e.book 46 ページ ２０１１年３月２日 水曜日 午前９時２０分
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