Protech 2000 User Manual

PROTECH

1/06

®

AUTOMATIC MICROPHONE MIXER

INSTALLATION & OPERATION MANUAL

www.protechaudio.com

MODEL 2000

WITH MIX-MINUS OUTPUTS.

The Protech Audio Model 2000 Automatic Microphone
Mixer is designed to be the best operating, most transparent
auto-mixer, for fixed installations. From the Dugan Speech
System for transparent gain-sharing, to the mix-minus
output on each input channel, to the card frame mechanical
packaging, the Model 2000 is constructed to provide the
designer and installer with every feature needed for perfect
auto-mixer installations.

Before proceeding further, please make note that the
Model 2000 is shipped from the factory with all prelimi­nary adjustments made. The gain on each input channel

is set to 50dB, the tone controls on each are set to flat,
and the master output level is set to unity. The unit
should be installed, turned on and listened to, before
any additional adjustments are made. In many installa­tions, no further adjustments will be required.
The first feature to make note of is the patented Dugan
Speech System for proper gain sharing in automatic mixing
applications. This operating system, when properly imple­mented, results in the best, most transparent automatic
mixing to be found anywhere. A short listening demonstra­tion has impressed even the most critical audio system
designers. We at Protech Audio have worked directly with
Dan Dugan Sound Design, for almost 3 years, to achieve
the optimum implementation of his superior auto-mixing
architecture.

The second feature to be discussed is the mix-minus
output on each input channel. Other systems require any
number of additional pieces of equipment, like wiring
matrixes, to achieve mix-minus. In the Model 2000, the
mix-minus feature is inherent in the design. Up to 8 separate
mix-minus outputs are inherent in each card frame assem­bly.
In addition to the mix-minus output, each input section
incorporates a number of features, to allow installations
to be done quickly, with a minimum of wiring and set-up
time. High-Pass filters, Bass and Treble Controls, Logic
Outputs, Phantom Power, and Mute functions are built
into each input channel.
The output card has provision for two balanced line
outputs, Auxillary Input, switch selectable Master/Slave
operation, Gain Trim, Remote Volume Control, Group
Mute, optional Automatic Level Control, and optional
Pink Noise Generator
The optional Automatic Level Control works in a very
unique manner. Instead of adjusting levels at the output
only, the ALC reaches back into each input channel and
readjusts the gain at each input. This feature allows the mix­minus to remain properly adjusted.
The card frame assemblies are linkable, to create systems
with up to 100 microphone inputs. The linking is accom­plished by using standard DB15 cables.

Protech Audio Corp., 192 Cedar River Road, Indian Lake New York, 12842 Voice 518-648-6410 Fax [phone]

INDEX

Page 2 ­Page 3 ­Page 4 ­Page 6 ­Page 7 ­Page 8 ­Page 9 ­Page 9 ­Page 10 ­Page 11 ­Page 12 ­Page 14 ­Page 16 ­Page 17 -

Index and Unpacking Instructions.
Unpacking Instructions.
Quickstart Set-Up
Input Card Description.
Input Card Mechanical and Connections.
Output Card Description.
Output Card Mechanical and Connections.
Pink Noise Generator Option
Using Mix-Minus Outputs.
Linking Chassis'
Remote Level Controls
Automatic Level Control Option
Using INTEGRA III SYSTEM Cards With Model 2000
Blank

Also reference application note AN2000.

The Model 2000 Automatic Microphone Mixer
is shipped from the factory with all cards
plugged into their proper slots. The mechani­cal drawings on the facing page show the
position of individual types of cards. If your
system required less than 8 inputs, the system
is shipped with the higher number card slots
empty. If your systems required more than 8
inputs, additional frames have been shipped,
along with the necessary link cables.

CAUTION: The Model 2000 has been assembled
and aligned at the factory. The unit should be
wired, turned on, and listened to, before any
field adjustments are made.

UNPACKING-

1- Remove chassis assembly from carton.
2- Open card frame front panel by loosening two
thumbscrews, remove pink anti-static shipping
insert and discard.
3- Count input cards, output(s) card, power supply
card(s), link cables, power supply transformers,
to insure correct quantities.

MOUNTING

The Model 2000 Automatic Microphone Mixer is
designed to be mounted in an industry standard
19" EIA rack. Care should be taken not to mount
the unit next to power supplies, power amplifiers,
or other equipment which generate strong AC
fields.

WIRING-

All audio inputs and output(s) should be wired
using double conductor shielded cable. Logic
circuits may be wired using unshielded cable.

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FRONT VIEW

PRODUCT COMPONENTS

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

INPUT
CARD
SLOT

OUTPUT

CARD

SLOT

1 TO 8 INPUT CHANNELS,

SLOTS 1 THRU 8 MAY BE USED FOR OTHER INTEGRA III SYSTEM MODULES

REAR VIEW

+15

GND

-15

GND ON

MASTER

LINK

IN

5678

4

3

2

POWER

SUPPLY

CARD

SLOT

1

18VACT
AC

CT
AC

GND

OUT

POWER SUPPLY, 1 PER
CHASSIS

Connector Plugs Into
Mating Connector On Chassis
(18VACT)

MALE

LINK IN

LINK CABLE

DB15

FE­MALE

LINK OUT

- Page 3 -