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In the 12T powering position, the mixers provides 12 volts DC to pin 2 of the XLR
input. Pin 3 is referenced to ground and pin 1 is shield to ground. 12T powering
should only be used with microphones designed to operate for the "T' standard
such as Sennheiser 416T and Scheops CMC4 Preamps.
D.
HI PASS FILTERS
Each input channel of the M3 Mixer is equipped with a high pass (low Cut) filter.
These filters are activated via the three way switches located below the adjacent
channel fader knobs. These filters will attenuate all frequencies below a preset
frequency at a rate of 6dB per octave. When set at "F"(Flat), frequencies below
20 Hz are effectively rolled off with the mixer operating at full frequency
response.
Optional high pass filter settings of H and H2 will roll off the
frequencies below these figures at a rate of 6dB per octave (-3dB level at 100Hz
and 140Hz respectively. High pass filtering is important in location recording
where wind noise can cause pre-amplifier overload.
minimized by switching the high pass filter setting to either a H or H2 cutoff. The
high pass filter switches are located on the front of the M3 Mixer.
E.
CHANNEL GAIN
In order to limit noise and increase headroom, the channel fader controls are
located in the feedback path of the pre-amplifiers. This provides continuously
variable gain rather than just a decrease in channel output level when an
overload situation occurs. This results in increased headroom and lower chance
of signal clipping (severe distortion).
F.
CHANNEL PANS
The new M3 Audio Mixer contains front panel mounted pan switches. These pan
switches are used to route the individual input channel's signal to either the left or
right summing buss.
H.
BOOM POLE REMOTE CONTROL
The M3 Mixer offers the ability to remotely control the audio level of the channel
one input. This feature allows the operator to boom with two hands rather than
holding the boom pole with one and riding levels with the other. To use this
feature you must first set up the mixer as normal (microphone power turned on,
channel fader opened to a normal operating signal level, etc). Strap the boom
pole remote control to your boom pole, and plug the TA3F connector into the
"remote" control connector located on the left side of the mixer near the input
XLR's. Set the slide fader on the remote control to it's mid position and re-adjust
the channel fader upward (clockwise) until a normal signal level is indicated on
the meters. You are now free to ride gain using the remote control. Sliding the
knob toward the cable end of the remote control lowers the volume, sliding the
knob away from the cable end of the remote raises the volume. To remove the
boom pole remote control, you must simply press the release button of the TA3F
connector and pull on it. This unlocks the connector. *Safety Note* You must
6
This effect can be
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