Nady Systems MXE-1212 - Manual (Page 6)

C O N T R O L S A N D C O N N E C T I O N S
6
(1) MIC INPUT
The Mic input is an elec-
tronically balanced XLR
type designed to accept
signals from any bal-
anced low impedance
(Low Z) microphone. To
accommodate condenser
microphones, this input is
also equipped with
+48VDC phantom power
globally switchable to all
XLR input jacks with the
Phantom Power switch
(38) on the back panel.
Dynamic or ribbon-type
microphones do not
require phantom power-
ing. It will be necessary to adjust the channel gain with the
input Trim control (4) and/or Pad switch (5) to achieve a
nominal operating level. The XLR jack is configured for: Pin1
= ground, Pin2 = positive (+), Pin3 = negative (-).
[Note: The Mic inputs are more sensitive than the Line inputs.
Also, do not connect mics with the phantom power switched
on, as indicated by the Phantom Power On LED (21) in the
Master Section of the front panel. Never use unbalanced mic
cables with the Phantom Power switched on. Never short the
+48VDC to ground, as that can cause serious damage to
your mixer. Also, turn down the Stereo Master faders (25A,
25B) to prevent possible sharp transient noise from damaging
the speakers when turning the phantom power on or off.]
(2) LINE INPUT
The Line input is designed to accept balanced or unbalanced
line-level signals such as those from keyboards, drum
machines, or samplers. There is enough gain available on the
line input to accept even lower level signals, such as those
from an unbalanced microphone or guitar output. Use the
Trim control (4) and/or Pad switch (5) to adjust for the
desired level. If a balanced signal is to be connected to the
line input, then a 1/4” TRS (stereo) phone plug should be
wired for: Tip = positive (+), Ring = negative (-), Sleeve =
ground.
(Note: Only the Mic or the Line input of a given channel can
be connected at one time. Never connect both simultaneously
to the same channel.)
(3) INSERTS
Channels 1-4 are equipped with rear panel insert jacks to
connect external signal processors such as compressors,
noise reduction systems, or effects devices to the individual
input channels. Insert points are useful for adding dynamic
processing or
equalization to a
channel or the mix.
Unlike reverbs,
etc., which are usu-
ally added to the
dry signal, dynamic
processing is nor-
mally applied
across an entire
signal. Here an Aux Send would be inappropriate. Instead,
the signal is intercepted somewhere along the channel, fed
through the dynamics processor and/or EQ, then returned to
the console at the same point where it left. The insert point is
normalized, i.e., the signal is only interrupted when a plug is
plugged into it. The insert jack is located pre EQ in the chan-
nel and is configured as: Tip = send, Ring = return, Sleeve =
ground.
The Insert can also be used as a channel direct output by
sending the signal from the ring. To use the Insert as a direct
output, insert a 1/4” phone plug halfway into the Insert jack
so the tip of the plug connects with the ring of the insert jack.
The jack will click into place when the connection to the ring
is made.
(4) TRIM CONTROL
The trim control adjusts the
input sensitivity (channel
gain) of the Mic and Line
inputs on the input chan-
nels. This control can be
adjusted to accommodate
input signals from a wide
variety of sources, from the
high outputs from key-
boards or drum machines
to the small signal outputs
of microphones. The trim
control adjusts the input
sensitivity from -20dB to -
60dB with the -20dB Pad
switch (5) in the OUT
position, and -40dB to 0dB
with the pad in the IN (but-
ton depressed) position.
The best balance of S/N
and dynamic range will be
achieved if you adjust the
TRIM control on each
channel separately so that
the Peak Indicator LED
(4A) for that channel lights
occasionally.
(4A) The Peak LED illumi-
(1)
(2)
(4A)
(5)
(6)
(4)
1. MONO INPUT SECTION
BACK PANEL
(3)