Art DMPA Operations Instructions

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ART Digital MPA™ Microphone Preamplifier
TABLE OF CONTENTS
Introduction ............................................................................................ 3
Introduction .......................................................................................... 3
Features............................................................................................... 3
Front Panel Controls .............................................................................. 4
Input Gain Control ............................................................................... 4
Input Impedance Control ................................................................. 4-5
Analog Output Control ......................................................................... 5
HPF Control ........................................................................................ 5
Gain Switch ......................................................................................... 5
Phantom Switch ................................................................................... 5
Phase Switch ...................................................................................... 5
Plate Voltage Switch......................................................................... 5-6
Meter Switch........................................................................................ 6
Digital Section Controls ........................................................................ 6
Digital Level Control ............................................................................ 6
Dither Switch ....................................................................................... 6
Sample Rate Control ........................................................................... 7
Optical Switch...................................................................................... 8
Front Panel Connections......................................................................... 8
Instrument Inputs................................................................................. 8
Rear Panel Connections......................................................................... 8
Balanced Inputs................................................................................... 8
Balanced Outputs ............................................................................... 8
Insert Jacks ......................................................................................... 9
Word Clock Jacks................................................................................. 9
ADAT Input .......................................................................................... 9
Optical Output....................................................................................... 9
S/PDIF Output ..................................................................................... 9
AES/EBU Output .................................................................................. 9
Signal Path Flow ................................................................................... 10
Signal Path Flow Diagram .................................................................. 10
Operating Instructions ......................................................................... 10
Obtaining the best noise performance............................................... 10
Adjusting the input impedance...................................................... 10-11
Obtaining the perfect digital level setting ........................................... 11
Setting the tube plate voltage ............................................................ 11
Warranty Information ........................................................................... 12
Service .................................................................................................. 12
Specifications ....................................................................................... 13
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Summary of Contents

Page 1 - TABLE OF CONTENTS

ART Digital MPA™ Microphone Preamplifier TABLE OF CONTENTS Introduction ...

Page 2 - DIGITAL MPA INTRODUCTION

ART Digital MPA™ Microphone Preamplifier NOTE: the Input impedance control only affects the cannon connector inputs. The 1/4” instrument input on t

Page 3 - FRONT PANEL CONTROLS

ART Digital MPA™ Microphone Preamplifier WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service

Page 4

ART Digital MPA™ Microphone Preamplifier 135) Include with your unit: a return shipping address (we cannot ship to a P.O. Box), a copy of your pur

Page 5

ART Digital MPA™ Microphone Preamplifier DIGITAL MPA INTRODUCTION The ART Digital MPA™ microphone preamplifier features a new low noise, high per

Page 6

ART Digital MPA™ Microphone Preamplifier FRONT PANEL CONTROLS Input Gain Control This control optimizes the input signal level before the tube

Page 7 - Rear Panel Connections

ART Digital MPA™ Microphone Preamplifier The 1/4” instrument input is NOT affected by this control, and remains high (>1M Ohm) imped-ance. Anal

Page 8

ART Digital MPA™ Microphone Preamplifier control. The DMPA takes about 10-30 seconds to smoothly transition from one mode to the other. There is a

Page 9 - DMPA OPERATING INSTRUCTIONS

ART Digital MPA™ Microphone Preamplifier Generally, keep the unit in 24-bit mode (the out position of the switch) unless you are connected to a sys

Page 10

ART Digital MPA™ Microphone Preamplifier Optical Switch The optical output jack of the DMPA can have one of two formats. When this switch is depr

Page 11 - SERVICE

ART Digital MPA™ Microphone Preamplifier Insert Jacks The insert jacks are used to process the audio passed on to the A/D converter. The Insert J

Page 12 - DMPA SPECIFICATIONS

ART Digital MPA™ Microphone Preamplifier SIGNAL PATH FLOW DIAGRAM The signal path of the DMPA consists of a discrete class A microphone pre-amp

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