58
Input channel operations
Input channel operations
The principal parameters of an input channel can be operated in the CHANNEL DISPLAY screen.
fig.ScrChDispGuide.eps
The principal operations for an input channel can be performed in
the CHANNEL DISPLAY screen.
1.
Preamp
fig.ScrChPreamp.eps
Here you can make settings for the preamp of the input jack
that is patched to the channel.
a. +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 r48V 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, therefore the output of the channel whose setting
you change will be briefly muted.
b. PAD button
This switches 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,
therefore 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.
c. 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.
d. GAIN knob
This adjusts the preamp gain in the range of -65 dBu– -10 dBu (if
PAD is on, a range of -45 dBu– +10 dBu).
e. 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. 122).
It is felt that it does not change smoothly when it coordinates
the preamp gain, but it is not trouble. In addition, some noises
come out, but it is not trouble.
Operations in the CHANNEL DISPLAY screen
CHANNEL DISPLAY screen
1
2
3
7
9
10
4
5
6
11
12
8
a
b
c
e
d
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
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