Phonic MM1705a, Руководство пользователя

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PHONIC CORPORATION
Page 15
MM1705a USER’ S MANUAL
INITIAL SET UP
This procedure is very important. Even if you
don’t like to read manuals, please read this
section.
After you connect up the system, you
are ready to set the initial set up for every input
channel. The matching of every input trim to the
signal source is crucial; every detail will affect the
final output of the mixer. Basically, the input sen-
sitivity adjustment for the channel fader and output
fader are the main factors. You should try to set
only as much microphone trim as required to
achieve good balance between signals. If the input
trim is set too low, you will not get enough gain on
the faders to push the signal up to an adequate
level. If the input trim is set too high, the channel
fader will need to be pulled down in compensation,
but it leaves a greater risk of feedback because
small fader movements will have a very significant
effect on output level. Certainly, the limited fader
travel path will not be successful in the mixing pro-
cedure. Please use the following set up procedure.
Don’t use the old way: turning the output up until
they clip and then backing off.
z Set all faders and trim controls all the way
off.
z Any condenser microphones should be con-
nected before the +48V phantom power is
switched on.
z Set power amplifier levels to 70%.
z Set the Headphones level to about 50%.
z If you want to hear what you’re doing later,
plug your headphones into the phones
output socket.
z Depress the MUTE button.
z Push in the PFL button.
z Set EQ control to the center position.
z Set PAN and BALANCE knobs to the center
position.
z You need headphones to continue.
z Apply a typical performance level signal,
monitoring the level on the LED meter.
Adjust the input trim until the meter shows around
the 0dBu position, with occasional peaks to the
first red LED at maximum source level. This al-
lows enough headroom to accommodate peaks
and the maximum level for normal operation. You
can listen to them through your headphones.
z For microphone sources, the gain control adjust-
ment will depend on what kind of microphone
you use, normally turn the trim clockwise to 2~3
o
’ clock. But please ask the singer to perform
outloud, don ’ t whisper, if they do not sing at a
normal level while you ’ re doing the sound check,
you might drive the mixer to overload or produce
feedback, because you set the gain too high
during the initial set up.
z Repeat this procedure on all other channels.
When more channels are added to the mixer,the
LED meters may move up to the red section,
adjust the overall level using the master faders if
necessary.
INITIAL SET UP