PSC M4 mkII Operation Manual Download Page 11

 11

D. 

M-S AND X-Y STEREO RECORDING 

 

The PSC m4mkII Mixer can be used to make stereo recordings in both the mid-
side and X-Y stereo techniques.  The M4mkII Mixer is equipped with an input 
channel ganging switch designed to allow the ganging of input channels 3 and 4.  
This switch is located on the bottom panel of the mixer.  When switched to the 
“ganged” position, both input channels 3 and 4 are controlled by pot 4.  All 
microphone powering and attenuation settings remain independent.  X-Y stereo 
recordings are accomplished by plugging in two identical microphones into 
channels 3 and 4.  The channel 3 pan pot is set to the extreme left and the 
channel 4 pan pot is set to the extreme right.  The headphone monitor mode 
switch is set to “stereo”.   
 
If M-S stereo recordings are desired, the “M” or middle microphone (cardiod 
pattern) is plugged into channel 3.  The “S” or side microphone (Figure 8 pattern) 
is plugged into channel 4.  As with the X-Y setup, pan pot 3 is panned to the 
extreme left and pan pot 4 to the extreme right.  In this case, the headphone 
mode switch is set to “MS”.  In the MS mode, the headphone amplifiers are fed 
MS decoded signals.  The left headphone amp is fed M-S signals and the right 
headphone is fed M+S signals.  In this manner, MS signals appear as standard 
stereo signals for headphone monitoring purposes.  Note that the MS decode 
function only affects the headphone feeds, not the main XLR outputs. 
 
More complete descriptions of the M-S and X-Y stereo recording techniques can 
be found in the literature of the major microphone manufacturers such as 
Neuman, Sennheiser, and Scheops. 
 
 

E. 

WIRELESS MICROPHONE POWER DISTRIBUTION 

 

Your new M4mkII Mixer is equipped with two four pin Hirose tm connectors 
designed to output DC power to operate you wireless microphone receivers.  The 
two connectors are located directly below the channel four input XLR connector.  
These two connectors are wired as follows:   
PIN 1 = GROUND  
PIN 4 + POSITIVE BATTERY VOLTAGE.  
This is the wiring standard found on most Betacams.  Many wireless microphone 
makers such as Lectrosonics tm supply cables pre-made for this purpose.  If you 
make you own cables, please understand that you must match grounding 
potentials or risk equipment damage!  Please also note that while the new 
M4mkII Mixer has extensive RF filtering built input the power line supplying these 
connectors, there remains a possibility that not all wireless frequencies will 
operate without interference with either the mixer or other wireless units.  Also 
note that all current supplied by these connectors is routed through the M4mkII 
Mixers Polyfuse (automatic resetting fuse) and thus there are limits to how much 
current can be supplied by these connectors.  That limit is typically 1 Amp.  
Excessive current will cause the Polyfuse to trip and shut off the mixer.  To 
restore power, simply switch off the mixer, disconnect the offensive load and turn 
the mixers power back on.     
 

 

Summary of Contents for M4 mkII

Page 1: ...M4mkII Portable Audio Mixer Operation Manual for Mixers with PCB V1 5 Copyright 2002 Professional Sound Corporation Printed in the U S A...

Page 2: ...INPUT LEVELS C MICROPHONE POWERING D LOW CUT FILTER E CHANNEL GAIN F CHANNEL PANS H BOOM POLE REMOTE CONTROL OUTPUTS 7 9 A BALANCED OUTPUTS B MULTIPIN BETA CONNECTOR C OUTPUT LIMITERS D TRANSCRIPTION...

Page 3: ...R DITRIBUTION POWERING 12 13 A INTERNAL POWER NP 1 BATTERY B INTERNAL POWER ALKYLINE BATTERIES C EXTERNAL POWER CONSTRUCTION 13 14 A CHASSIS B ELECTRONIC TOPOLOGY C ENVIRONMENTAL OPERATION D PORTA BRA...

Page 4: ...unctions necessary to produce studio quality recordings in the field It s user friendly features rugged design and sonic purity make the M4mkII Mixer perfect for electronic news gathering ENG electron...

Page 5: ...n 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 M4mkII s preamplifie...

Page 6: ...ilter switches are located on the front of the M4mkII 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 amplifie...

Page 7: ...h quality custom made audio output transformers These transformers have been designed to provide wide bandwidth low distortion and real world ease of use Transformers have been chosen over a transform...

Page 8: ...RECORDING TO BETACAM TYPE CAMERAS Most video cameras have limited audio track headroom and can easily be overloaded resulting in distortion of the recorded audio Play it safe use the limiters D TRANSC...

Page 9: ...r We designed this meter to be easy to read and camera emulating Because the most common use of this type of mixer is with Betacams we designed the M4mkII s meters to emulate the peak reading attribut...

Page 10: ...M4mkII Mixer This adjustment is factory calibrated and should not be adjusted without proper measurement equipment C BATTERY TEST In addition to the low battery indicator on the LCD meter the M4mkII...

Page 11: ...ffects the headphone feeds not the main XLR outputs More complete descriptions of the M S and X Y stereo recording techniques can be found in the literature of the major microphone manufacturers such...

Page 12: ...own on the latch and pull out the battery B INTERNAL POWER ALKALINE BATTERIES Eight AA alkaline batteries can also power the M4mkII Mixer These batteries are housed in a convenient battery tray design...

Page 13: ...ally coated with an epoxy powder coating This powder coat paint is then baked on in an oven Powder coating chosen for its durability and environmental friendly characteristics All silk screening is pr...

Page 14: ...SC M4mkII Mixer is especially designed for easy interfacing with all popular Betacam type cameras The M4MKII is equipped with a 10 pin Hirose tm connector on the left hand side panel This all inclusiv...

Page 15: ...ze RF interference through the use of output transformers and other RF filtering It is important to note that transmitter placement greatly affects transmit range and clarity For best results transmit...

Page 16: ...l to Noise 128 5dB EIN 150 Ohms Distortion 00 08 THD Low Cut Filter 100Hz 140Hz 12dB Octave Mic Power DYN 48 PH Oscillator 440Hz Limiter 1mS Attack 100 mS Release 2 7 1 Ratio Warranty 1 Year Limited C...

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