113
Talkback/Oscillator
Talkback/Oscillator
MIC SELECT buttons
These select the CONSOLE IN that connects a talkback mic.
The preamp gain of the selected CONSOLE IN will be locked by
the MIC LEVEL knob on the TALKBACK/OSC section.
If you don’t use talkback, select “NONE”.
+48V button
This turns the +48V phantom power on/off for the CONSOLE
IN selected in the MIC SELECT buttons.
You must turn off phantom power if you’ve connected a device
that does not r48V phantom power. Inadvertently
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 included with the microphone or other device
you’re using, and check its specifications.
SENS indication
This indicates the preamp gain of the CONSOLE IN selected
in the MIC SELECT buttons.
PAD button
This turns the pad on/off for the CONSOLE IN selected in the
MIC SELECT buttons. Turning this on will lower the input
sensitivity of the preamp by 20dB.
LEVEL knob
This adjusts the level of the talkback in a range of -Inf dB–
+10.0 dB.
OSCILLATOR
fig.ScrTalkbackGuide3.eps
SINE FREQ knob
This adjusts the frequency of the sine wave in a range of 20
Hz–20 kHz.
LEVEL knob
This adjusts the level of the sine wave in a range of -Inf dB–
0.0 dB.
Talkback/Oscillator output-destination select
buttons
These buttons select the buses to which the talkback
/
oscillator
will be sent.
The function buttons have the following operations:
1.
Access the TALKBACK/OSCILLATOR screen.
2.
Use the MIC SELECT buttons to select the CONSOLE IN
that is used for talkback.
3.
Connect a mic to the
CONSOLE IN you selected in step 1
.
4.
In the
TALKBACK/OSC
section, use the MIC LEVEL knob to
adjust the input gain of the mic.
If you’ve connected a mic that re48V phantom
power, use the on-48V button to turn on +48V
phantom power.
5.
Use the talkback
/oscillator
output-destination select
buttons to select the bus to which the talkback signal will
be sent.
6.
In the
TALKBACK/OSC
section, press [TALKBACK] to turn
talkback on.
If talkback is on, [TALKBACK] will be lit in the talkback/oscillator
section.
1.
Access the TALKBACK/OSCILLATOR screen.
2.
Use the SINE FREQ knob and LEVEL knob to adjust the
sine wave.
3.
Use the
talkback/
oscillator output-destination select
buttons to select the bus to which the oscillator signal
will be sent.
4.
Press [F1 (OSC ON)] to turn the oscillator on.
The oscillator signal will be sent to the bus you selected in
step 3.
You can also make the setting for switching the oscillator on or
off from a USER button (p. 136).
1
2
3
4
5
3
2
1
1
2
4
[F
1
(OSC ON)]
Turns the oscillator on/off.
Using talkback
Using the oscillator
The way in which [TALKBACK] turns on/off will depend on
how you press the button.
If you press and immediately release the button, the button
will operate in Latch mode, alternately turning talkback on
or off.
If you press and hold down the button, the button will
operate in Momentary mode, and talkback will remain on
only while you continue holding down the button.
M-300_e.book 113 ページ ２０１０年４月２２日 木曜日 午前８時１７分
