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INTRODUCTION 

 

 
The Decimator

 ProRack noise reduction system defines a new standard for excellence 

in  real  time  noise  reduction  performance.    The  Decimator  ProRack  was  designed  to 
provide  the  maximum  possible  performance  in  a  rack  mount  dual  channel  noise 
reduction system.   The Decimator ProRack has dual processing channels incorporating 

both  low-level  downward  expansion  and  dynamically  controlled  low-pass  filtering  in  a 
very  easy  to  use  single  rack  space  unit.      The  Decimator  ProRack  is  based  on  ISP 
Technologies  patent  pending  “Time  Vector  Processing”  which  provides  the  most 

adaptively  dynamic  release  response  characteristics  of  any  real  time  noise  reduction 
system.   The patent pending Time Vector Processing dynamic response circuit is used 
to control the release time constant of both the downward expander and dynamic filter.    
 

Please read this manual carefully for a through explanation of the Decimator ProRack 
and its functions.   
 

    
 

PRECAUTIONS 

 

NOTE: IT IS VERY IMPORTANT THAT YOU READ THIS SECTION TO PROVIDE YEARS OF 
TROUBLE FREE USE.  THIS UNIT REQUIRES CAREFUL HANDELING. 
 

All warnings on this equipment and in the operation instructions should be adhered to and 
all operating instructions should be followed. 
 

Do not use this equipment near water. Care should be taken so that objects do not fall onto 
and liquids are not spilled into the unit through any openings.   
 

The power cord should be unplugged from the outlet when the unit is left unused for a long 
period of time. 
 

DO NOT ATTEMPT TO SERVICE THIS EQUIPMENT. THIS EQUIPMENT SHOULD BE 
SERVICED BY QUALIFIED SERVICE PERSONNELL ONLY.  DO NOT MAKE ANY INTERNAL 
ADJUSTMENTS OR ADDITIONS TO THIS EQUIPMENT AT ANY TIME.  DO NOT TAMPER 

WITH INTERNAL ELECTRONIC COMPONENTS AT ANY TIME.  FAILURE TO FOLLOW THESE 
INSTRUCTIONS WILL VOID THE WARRANTY OF THIS EQUIPMENT, AND MAY CAUSE A 
SHOCK HAZZARD. 

 

POWER REQUIREMENTS 

This unit accepts power from the 9V AC power adaptor supplied with the unit.  This 9V RMS 

AC voltage is internally processed by a voltage doubler, which generates a bi-polar + and –
15V  power  supply  to  maintain  the  headroom  and  sound  quality  of  professional,  studio 
quality  equipment.    Using  an  external  power  source  minimizes  excessive  noise  and  hum 

problems often associated with internal transformers, providing optimal performance for the 
user.   

 

Summary of Contents for Decimator Prorack

Page 1: ......

Page 2: ...EQUIRES CAREFUL HANDELING All warnings on this equipment and in the operation instructions should be adhered to and all operating instructions should be followed Do not use this equipment near water C...

Page 3: ...uit path When the led is lit the channel is active 5 INPUT OUTPUT REFERENCE LEVEL SWITCH This switch changes the input and output operating reference level of each individual channel from 10dbu when s...

Page 4: ...annel 1 3 CHANNEL 2 INPUT JACK This inch mono jack provides a balanced input for the audio path channel 2 4 CHANNEL 2 OUTPUT JACK This inch mono jack provides the unbalanced output signal for channel...

Page 5: ...one by use of a high quality voltage controlled sliding filter A frequency sensitive audio level detection circuit incorporating ISP Technologies patent pending Time Vector Processing circuit controls...

Page 6: ...ponse of the Expander with a 0db threshold To set up the Decimator ProRack for proper operation first determine the reference level of the system that the Decimator will be connected to Most professio...

Page 7: ...a point just above the highest input frequency The instant the input signal contains a high frequency audio signal the bandwidth of the filter will open so as to allow the highs to pass unaltered Sinc...

Page 8: ...nd send it to ISP Technologies LLC 5479 Perry Drive Unit B Waterford MI 48329 Attn Repair Dept All shipping charges must be fully prepaid ISP will not be responsible for any damages incurred in shippi...

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