Phonic MM1002a, Руководство пользователя

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PHONIC CORPORATION
Page 8
MM1002a/1202a USER’ S MANUAL
cause it always has a lower resis-
tance and better distribution than the
signal ground.
If there is hum, one possible reason
is a bad ground connection for the
system. In case you cannot find the
fault, try connecting the ground pin
of the input connectors. If the hum is
reduced or eliminated, check your
power grounding system. Special at-
tention is needed when you use the
equipment racks with some distance
between them, and/or use a large
quantity of power amplifiers. Check
the power ground between the racks
and power distribution strips with
your electrical supply engineer. Make
sure there is one, and only one,
proper ground point for the audio
system (or connected video system).
INPUT CHANNEL
DESCRIPTION
1 MIC / LINE
MM1002a (Ch1~2) /
MM1202a (Ch1~4)
MIC
The microphone is via an XLR con-
nector. Please use only professional
low impedance microphone and
properly wired the cable for best re-
sult.
LINE
The unbalanced 1/4" TS phone jack
accepts line level signal from key-
boards, synthesizer, sampler, CD, or
tape recorder. Tip is hot(+) and
sleeve is ground.
2 GAIN
This rotary knob adjusts the chan-
nel signal level. If too high, the sig-
nal will distort as it overloads the
channel; too low, the level of back
hiss will be even noticeable and there
might be insufficient signal level to
the output of the mixer. Proper gain
setting allows the mixer to work in
the best operating level, adjusts the
gain when signal presents to the
highest level without triggering the
peak LED. That is the most appro-
priate position.
This gain has two kinds of indication
to suit mic or line input, when you
use mic input, please read inside ring
from 0~+60 dB, if you use line input,
please read the outside ring from
-20~+40dB.
3 3-Band EQUALIZER
HIGH
Turn right to boost high frequency,
adding crispness to cymbals, vocals
and electronic instruments. Turn left
to cut this frequency, reducing sibi-
lance or hiss. The control has a
shelving response that gives 15dB
of boost or cut at 12KHZ.
INPUT CHANNEL DESCRIPTION