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INPUTS:
A.
BALANCED INPUTS
The PSC M3 Audio Mixer provides three input channels utilizing female XLR
connectors. The studio grade input circuitry is transformer balanced for improved
RF rejection and in-field practicality. The XLR connectors are wired as follows:
Pin 1 shield (ground), Pin 2 Audio high (in phase), Pin 3 Audio low (out of phase).
Balanced wiring enables longer cable runs without the worry of excessive noise
due to nearby electromagnetic and radio frequency interference.
balanced inputs may be unbalanced if desired. Either pin 2 or 3 may be tied to
ground (pin 1) to unbalance the inputs of the M3 Mixer. Note: The AES standard
for unbalancing an XLR connector is to tie pin 3 to ground (pin 1).
B.
INPUT LEVELS
The PSC M3 Mixer can accommodate a wide range in input levels. Microphone
levels of all types can be handled as well as line level signals. The input range of
the M3 Mixer is –60dBu to +4dBu. Thus the M3 is compatible with all forms of
consumer and professional audio equipment.
located below and to the right of each input XLR connector. These input level
switches provide for three level settings:
attenuation), "C" Condenser Microphone (15dB attenuation), and "L" Line Level
(50dB attenuation) These input level attenuation settings are used to correctly
interface sources of varying levels to the M3's preamplifiers.
matching ensures maximum headroom and lowest possible noise floor.
C.
MICROPHONE POWERING
The M3 Mixer can accommodate the most popular microphones used today.
The microphone powering switches are located directly below the input XLR
connectors. They can be switched to either Dynamic (D) or 48Phantom (48) or
12T (T).
In the Dynamic position the mixer provides no microphone powering.
position is used with Dynamic Microphones, Line Level inputs and when using
Wireless Receivers.
In the 48 Phantom Position the mixer provides 48 volts DC to power 48PH
microphones or simplex powered microphones with a range of 9 to 52 volts or 12
to 52 volts. Pin 1 is shield to ground while pins 2 and 3 carry 48 volts DC. The
term "phantom" is derived from the fact that there is no voltage potential
developed across a dynamic microphone transducer that would interfere with its
operation. However, most portable wireless receivers will not operate with 48PH
turned on. We strongly recommend setting inputs to dynamic for use with all
wireless systems.
The input level switches are
"D" Dynamic Microphone (0dB
5
These
Correct level
This
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