Wheatstone Corporation A-2000 User manual

A-2000 Linear Audio Console
TECHNICAL MANUAL
600 Industrial Drive, New Bern, North Carolina, USA 28562

WHEATSTONE CORPORATION
600 Industrial Drive
New Bern, North Carolina 28562
tel [phone] / fax [phone]
A-2000 Linear Audio Console Technical Manual - 1st Edition
©2001 Wheatstone Corporation
A-5000 / Nov 98
2000 / Apr 2001

page Contents – 1
A-2000 / Apr 2001
CONTENTS
A-2000 Technical Manual
Table of Contents
Chapter 1 – Installation and Power
Unpacking the console.............................................................. 1-2
CountertopMounting................................................................. 1-2
System Ground .......................................................................... 1-3
Power Supplies .......................................................................... 1-4
The PSC-D340 Power Supply ................................................................................ 1-4
Power Connector Pinout......................................................................................... 1-5
Failsafe Dual Redundant Supply............................................................................ 1-6
Energizing ............................................................................................................... 1-6
Audio and Control Wiring.......................................................... 1-7
The Insulation Displacement Connector System ................................................... 1-7
ConnectionProcedures .......................................................................................... 1-8
Analog Insert Points................................................................................................ 1-8
Unbalanced Connections (analog audio) ............................................................... 1-8
Modules Layout.......................................................................... 1-8
Modules Layout Drawing........................................................... 1-9
Wiring Procedure - Double Connection to One Pin .............. 1-10
Chapter 2 - Mono Mic Inputs
Module Overview........................................................................ 2-2
Internal Programming Options ................................................. 2-3
Insert Bypass .......................................................................................................... 2-3
Phantom Power ...................................................................................................... 2-3
Mutes ...................................................................................................................... 2-3
Timer Restart .......................................................................................................... 2-3
Local/Ready ............................................................................................................ 2-3
Talkback.................................................................................................................. 2-4
Hook-ups..................................................................................... 2-4
AUDIO CONNECTIONS......................................................................................... 2-4
CONTROL CONNECTIONS................................................................................... 2-5
Remote ON & OFF ................................................................................................. 2-5
Cough ..................................................................................................................... 2-5
External START & STOP ....................................................................................... 2-5
Ready...................................................................................................................... 2-6
Talkback to Control Room ...................................................................................... 2-6
On Tally................................................................................................................... 2-6
Tally B ..................................................................................................................... 2-6
DB Connector Pinout Drawing.................................................. 2-7
A-2000 / Aug 2002

page Contents – 2
A-2000 / Apr 2001
CONTENTS
Chapter 3 - Stereo Line Inputs
Module Overview...........................................................................3-2
Internal Programming Options ....................................................3-3
Mutes ........................................................................................................................ 3-3
Timer Restart ............................................................................................................ 3-3
Local/Ready .............................................................................................................. 3-3
Talkback.................................................................................................................... 3-3
Hook-ups........................................................................................3-4
AUDIO CONNECTIONS........................................................................................... 3-4
CONTROL CONNECTIONS..................................................................................... 3-4
Remote ON & OFF ................................................................................................... 3-5
Cough ....................................................................................................................... 3-5
External START & STOP ......................................................................................... 3-5
Ready........................................................................................................................ 3-5
Talkback to Control Room ........................................................................................ 3-5
On Tally..................................................................................................................... 3-6
Tally B ....................................................................................................................... 3-6
DB Connector Pinout Drawing.....................................................3-7
Chapter 4 - Output Module
Module Overview...........................................................................4-2
Hook-ups........................................................................................4-3
DB-25 Connector — Audio ...................................................................................... 4-3
DB-9 Connector — Audio ........................................................................................ 4-3
DB-9 Connector — Control...................................................................................... 4-4
DB Connector Pinout Drawing.....................................................4-5
Chapter 5 - Control Room/Studio Module
Module Overview...........................................................................5-2
Internal Programming Options ....................................................5-3
Cue Interrupt............................................................................................................. 5-3
CR/Cue Mute ............................................................................................................ 5-3
Studio Mute............................................................................................................... 5-3
Studio Dim ................................................................................................................ 5-3
Hook-ups........................................................................................5-4
Left DB-25 “A” Connector — AUDIO........................................................................ 5-4
Right DB-25 “B” Connector — AUDIO ..................................................................... 5-4
DB Connector Pinout Drawing.....................................................5-6

page Contents – 3
A-2000 / Apr 2001
CONTENTS
Chapter 6 - Studio Two Control Module
Module Overview...........................................................................6-2
Internal Programming Options ....................................................6-3
Cue Interrupt............................................................................................................. 6-3
HDPN 3 Mute............................................................................................................ 6-3
Studio 2 Mute............................................................................................................ 6-3
Studio 2 Dim ............................................................................................................. 6-3
Hook-ups........................................................................................6-4
Left DB-25 “A” Connector — AUDIO........................................................................ 6-4
Right DB-25 “B” Connector — AUDIO ..................................................................... 6-4
DB Connector Pinout Drawing.....................................................6-6
Chapter 7 - Superphone Input Module-optional
Module Overview...........................................................................7-2
Caller Set-Ups .......................................................................................................... 7-2
Internal Programming Options ....................................................7-3
Mutes ........................................................................................................................ 7-3
Timer Restart ............................................................................................................ 7-3
Cain Trimpots ........................................................................................................... 7-3
Hook-ups........................................................................................7-3
AUDIO CONNECTIONS........................................................................................... 7-3
CONTROL CONNECTIONS..................................................................................... 7-4
Remote ON & OFF ................................................................................................ 7-4
External START & STOP ...................................................................................... 7-4
On Tally.................................................................................................................. 7-4
DB Connector Pinout Drawing.....................................................7-5
Chapter 8 - Line Preselector-optional
Overview ........................................................................................8-2
Internal Programming Options ....................................................8-2
Hook-ups........................................................................................8-3
Left DB-25 “A” Connector—Audio Inputs ................................................................. 8-3
Left DB-25 “A” Connector—Audio Outputs .............................................................. 8-3
Right DB-25 “B” Connector—Audio Inputs............................................................... 8-3
DB Connector Pinout Drawing.....................................................8-5
Chapter 9 - Tape Remote Module-optional
Overview ........................................................................................9-2
DB Connector Pinout Drawings
START/STOP Function Control I/O....................................................................... 9-3
Full-Function Control I/O ....................................................................................... 9-4

page Contents – 4
A-2000 / Apr 2001
CONTENTS
Chapter 10 - Meterbridge
Overview .......................................................................................10-2
Digital Timer .................................................................................10-2
Console Clock ..............................................................................10-2
Controls.................................................................................................................... 10-3
Setting the Time....................................................................................................... 10-3
Capacitor Backup .................................................................................................... 10-3
Operational Modes .................................................................................................. 10-3
Chapter 11 - Parts List
MM-2000 Mono Mic Input........................................................................................ 11-2
SL-2000 Stereo Line Input....................................................................................... 11-4
OM-2000 Master Output.......................................................................................... 11-6
CRS-2000 Control Room/Studio ............................................................................. 11-8
SS-2000 Studio Two............................................................................................... 11-11
SPN-2000 Superphone Input (optional) ................................................................. 11-14
LS-2000 Line Selector (optional)............................................................................ 11-16
TR-2000/FF Tape Remote (optional) ..................................................................... 11-17
TR-2000/SS Tape Remote (optional)..................................................................... 11-18
MBR-2000 Mother Board (Right)............................................................................ 11-19
MBE-2000 Mother Board (Extender)...................................................................... 11-20
MBE-2600 Mother Board........................................................................................ 11-21
CLK-70 Clock.......................................................................................................... 11-22
CLD-70 Clock Display............................................................................................. 11-24
A-2000 Frame......................................................................................................... 11-25
PSC-D340 Power Supply ....................................................................................... 11-26
A-2000 Connector Kit ............................................................................................. 11-28
A-2000 Console ...................................................................................................... 11-29
A-2000 Spare Parts Kit........................................................................................... 11-30
Chapter 12 - Schematic Drawings
Console Flow Diagram ................................................................12-2
Mono Mic Input (MM-2000)
schematic................................................................................................................. 12-3
load sheet drawing................................................................................................... 12-6
Stereo Line Input (SL-2000)
schematic................................................................................................................. 12-7
load sheet drawing.................................................................................................. 12-10
Output Master (OM-2000)
schematic................................................................................................................ 12-11
load sheet drawing.................................................................................................. 12-14
Control Room/Studio (CRS-2000) & Studio Two (SS-2000)
schematic................................................................................................................ 12-15
load sheet drawing.................................................................................................. 12-18
A-2000 / July 02

page Contents – 5
A-2000 / Apr 2001
CONTENTS
Superphone(SPN-2000)
schematic............................................................................................................ 12-19
load sheet drawing.............................................................................................. 12-22
Line Select (LS-2000)
schematic............................................................................................................ 12-23
load sheet drawing.............................................................................................. 12-26
Tape Remote (TR-2000)
schematic............................................................................................................ 12-27
load sheet drawing.............................................................................................. 12-28
Clock/Timer(CLK-70)
schematic............................................................................................................ 12-29
load sheet drawing.............................................................................................. 12-30
Clock/Timer Display (CLD-70)
schematic............................................................................................................ 12-31
load sheet drawing.............................................................................................. 12-32
Mother Board—Extender (MBE-2011)
schematic............................................................................................................ 12-33
load sheet drawing.............................................................................................. 12-35
Mother Board—Right (MBR-2000)
schematic............................................................................................................ 12-36
load sheet drawing.............................................................................................. 12-37
Power Supply
PSC-D340 schematic ......................................................................................... 12-38
PSC-D340 load sheet drawing ........................................................................... 12-39
AC-340 schematic .............................................................................................. 12-40
AC-340 load sheet drawing ................................................................................ 12-41
BRA1 schematic ................................................................................................. 12-42
BRA1 load sheet drawing ................................................................................... 12-43
FSI-2 schematic.................................................................................................. 12-44
FSI-2 load sheet drawing.................................................................................... 12-45

INSTALLATION and POWER
page 1 – 1
A-2000 / Apr 2001
Installation and Power
Chapter Contents
Unpacking the Console ............................................................. 1-2
CountertopMounting................................................................. 1-2
System Ground .......................................................................... 1-3
Power Supply ............................................................................. 1-4
The PSC-D340 Power Supply ............................................................................ 1-4
Power Connector Pinout..................................................................................... 1-5
Failsafe Dual Redundant Supply........................................................................ 1-6
Energizing........................................................................................................... 1-6
Audio and Control Wiring.......................................................... 1-7
The Insulation Displacement Connector System ............................................... 1-7
ConnectionProcedures ...................................................................................... 1-8
Analog Insert Points ........................................................................................... 1-8
Unbalanced Connections (analog audio) ........................................................... 1-8
Modules Layout.......................................................................... 1-8
Modules Layout Drawing........................................................... 1-9
Wiring Procedure - Double Connection to One Pin .............. 1-10
A-2000 / Aug 2002

INSTALLATION and POWER
page 1 – 2
A-2000 / Apr 2001
Installation and Power
Unpacking the Console
TheA-2000 consoleis shippedastwo packages.One cartoncontains
theconsole andthe secondcartoncontainsthepower supply,connecting
cable, connector kit and documentation.
CountertopMounting
The A-2000 audio console is designed for countertop mounting.
Consoleplacementshouldavoidproximitytoanyelectromagneticfields,
such as large power transformers, motors, and fluorescent lighting
fixtures. If you will be securing the console to the counter top, you may
want to pre-drill the mounting holes (see sketch below).
Set the console in place on the counter, and remove the screws that
hold down the first and the last modules in place (two per module).
Carefully remove those modules from the frame. Attach the console
mainframe to the counter top, using the holes provided in the bottom of
the chassis and screws appropriate to the counter material, and reinstall
the removed modules.
Theconsoleextendsapproximately75/8”abovethecountertopatthe
meterbridge.Thehingedmeterbridgewillrequire14”abovethecountertop
surface and 4 3/4” behind the rear meterbridge to open freely.
DonotconnecttheA-2000consoletoitspowersupply(anddonot
connectthepowersupplytotheACpowerline)untilinstructedtodo
so.
NOTE: This console
contains static-sensi-
tive devices. Normal
precautions against
staticdischargeshould
beobservedwhenhan-
dling individual mod-
ules.
40.770
24.180
37.750
17.750
39.270
.760
7.369 (WITHOUT FEET)
7.6341
D = .171"; USE #8 SCREWS
2.356
20.044
.750
7.369 (WITHOUT FEET)
7.6341
D = .171”; USE #8 SCREWS
A-2000 / Sep 2002

I N S T A L L A T I O N a nd P OWER
page 1 – 3
A-2000 / Apr 2001
CONSOLE
2-TRACK
MULTI-TRACK
AC BREAKER
BOX
DEVICE 1
DEVICE 2
DEVICE N
CONSOLE POWER SUPPLY
CONTROL ROOM POWER AMP
STUDIO POWER AMP
OTHER
POWER COMPANY
EARTH GROUND
HEAVY
(#4 or #6)
COPPER
WIRE
HIGH POWER
EQUIPMENT RACK
COPPER ROD
SOIL 3-wire ground or separate wire run from chassis
EFFECTS RACK
MIC PANEL
GND
TYPICAL SYSTEM
GROUNDING SCHEME
etc.
3–5 ft.
Tie the console ground lug
terminal strip to the system
earth ground. Tie every piece
of equipment in the entire
audio system to the console
ground lug terminal strip.
System Ground
The first step is to ground the console.
Note that as supplied from the factory, console rackmount power
supply common, audio ground, and the A-2000 mainframe are con-
nected together at the console, but are NOT connected to electrical
ground and the chassis of the power supply. Safety requirements
dictate that a positive connection from the console mainframe to
electrical ground be made in the completed installation. Use the
grounding lug on the rear of the mainframe to establish your system
ground. The grounding lug may be found at the rear of the console, on
the rear frame panel, to the left if you are looking at the rear of the
console.
The system ground serves two important purposes:
(1) It provides a zero signal reference point for the entire audio system;
(2) It assures safety from electrical shock.
There exist two terms that one encounters in a discussion of ground:
(A) EARTH GROUND, which is usually a heavy copper rod driven into the
soil adjacent to the building (around 6 feet down) or a connection to the copper
water pipes leading into the building. Either is acceptable (unless, of course,
the water pipe is made of plastic).

INSTALLATION and POWER
page 1 – 4
A-2000 / Apr 2001
(B) THE POWER COMPANY EARTH CONDUCTOR that enters the build-
ing at the power line breaker box; this conductor should be (and is often by code)
tiedtothe above-mentioned earthgroundatone point. Thispointisthe SYSTEM
EARTH GROUND.
TIE THE CONSOLE GROUND LUG TO THE SYSTEM EARTH
GROUND. TIE EVERY PIECE OF EQUIPMENT IN THE ENTIRE
AUDIO SYSTEM TO THE CONSOLE GROUND LUG. If the system
earthground point isinaccessible, tietheconsole groundlug to thepower
company earth conductor at the main breaker box (see drawing "Typical
Grounding Scheme" on previous page).
Each piece of equipment should be connected by its own ground wire
(usually the round third pin on the AC cord). This means that every AC
outlet must have a separate conductor run to the console ground lug; the
outletscannotbedaisy-chainedasisnormallyencounteredincommercial
andresidentialACsystems. Any equipmentnotsupplied with3-wireAC
cables must have individual ground wires (16 gauge or larger) connected
to their chassis grounds and then run to the console ground lug terminal
strip.
Further Grounding Details
Check all equipment to be absolutely certain that each unit is power
transformer isolated from the AC mains to prevent safety hazards.
It is assumed that in each piece of audio equipment the audio ground
and the chassis are tied together at some point. Any piece of equipment
lacking a grounded chassis is likely to be prone to interference problems.
Locateallunbalanced audioequipment inthesame rackifpossible, to
minimize chassis ground potential differences. It may also be helpful to
insulateeachpieceofunbalancedequipmentfromitsmountingrailsinthe
rackbymeansofnylon10-32screwsandinsulatingwashersbetweenrails
and faceplates.
Once the system is properly grounded, proceed with the console
power supply installation and connection (next section).
Power Supplies
The A-2000 console is powered by a Wheatstone Model PSC-D340
rackmount power supply. This heavy duty unit occupies three 19” wide
rack spaces (total height 5-1/4”). Convection cooled, it requires ample
ventilation space above and below it. The PSC-D340 generates a lot of
heat in the course of normal operation — do not mount heat sensitive
devices in the same rack cabinet.
Notethepowersupplyshouldbemountedinanequipmentrackwithin
fifteen feet of the console (but no closer than 3 feet). Avoid locating any
highgainequipment(suchasphonopreamps,taperecorders,etc.)toonear
the rackmount supplies, to avoid magnetic interference into that equip-
ment.
Iffailsaferedundantsup-
plieshavebeenordered,
you will be installing two
units and an additional
rackmount panel.

INSTALLATION and POWER
page 1 – 5
A-2000 / Apr 2001
Once the supply is rackmounted, it should be connected to the
console using the factory supplied cable. The console’s power supply
connector is located at the rear of the console, at the right end of the
meterbridge bottom pan. If you are using one supply, connect it to the
console connector. If you are using two supplies (failsafe option),
connect the long power supply cable to the center connector of the
rackmountfailsafepanel.Thenconnectonesupplywithashortcableto
eitherofthetworemainingconnectorsonthefailsafepanelandconnect
the second supply with a short cable to the last connector. Note that the
powersupply cable’s10-pin femaleconnector hasto berotateduntil its
locating pins match the male connector on the console. Do not force a
connector on; it attaches easily when properly aligned. Connect the
cablefirsttotheconsole,thentotherearoftherackmountpowersupply.
Noteeachpowersupplyisfittedwitha3-wiregroundedACcordthat
shouldbepluggedintoa"clean"ACpowersource,thatis,anACsource
that feeds only the control room audio gear. This source should be a
separate feed from those powering lighting, air-conditioning, or any
othernon-audiomachinery. ThethirdpingroundwireoftheACsource
shouldbetiedtothecentralsystemgroundpoint. NotethatwhiletheAC
powercord groundwireterminates atthe power supplychassis, itdoes
NOTconnect to the A-2000console common; theconsole itself must be
grounded separately. (See previous section, "System Ground".)
The power feed recom-
mended in the text is of-
teninstalledandreferred
to in studios as an “iso-
lated AC ground” outlet.
It is usually orange in
color.
The PSC-D340 Power Supply
HA
ED
I
JB
C
G
F
TYPICAL POWER
CONNECTOR
(10-pin)
A :
B :
C :
D :
E :
F :
G :
H :
I :
J :
audio/phantom common
+V audio
-V audio
digital common
phantom power
digital common
+digital
+digital
n/c
n/c
ON
OFF
+VD1 PHANT
Model PSC-D340 Power Supply
D2
– V
1
0

INSTALLATION and POWER
page 1 – 6
A-2000 / Apr 2001
Failsafe Dual Redundant Supply
Wheatstone failsafe power supply systems use two separate rack-
mount power supplies for each piece of powered equipment. Though
either is capable of running a full load on its own, in failsafe operation
both units run in tandem: if one fails, the other takes over, assuring
uninterrupted operation.
NOTEdualfailsafesupplieshavetheiroutputs trimmedtoentirely
different settings than stand-alone single units, and are MEANT to be
run in tandem.
In order for failsafe systems to perform as designed, always have
BOTH rackmount supplies powered up and connected to their associ-
ated equipment.
Energizing
Assuming the A-2000 console mainframe is properly placed and
grounded,anditsPSC-D340powersupplycorrectlyrackmountedand
connected to the console, you may now energize the PSC-D340
rackmount power supply by plugging it into the AC mains. The five
LEDs on the power supply front panel should light up to indicate the
presence of their respective voltages. The console's LED meters will
illuminateandindividualmoduleswitcheswillassumefactorydefault
settings.
Once you have verified proper power-up, turn off the rackmountOnce you have verified proper power-up, turn off the rackmount
Once you have verified proper power-up, turn off the rackmountOnce you have verified proper power-up, turn off the rackmount
Once you have verified proper power-up, turn off the rackmount
power supply to de-energize the console. You may now proceed topower supply to de-energize the console. You may now proceed to
power supply to de-energize the console. You may now proceed topower supply to de-energize the console. You may now proceed to
power supply to de-energize the console. You may now proceed to
wire up audio and control connections.wire up audio and control connections.
wire up audio and control connections.wire up audio and control connections.
wire up audio and control connections.

INSTALLATION and POWER
page 1 – 7
A-2000 / Apr 2001
Audio and Control Wiring
All audio and control I/O connections to the A-2000 console are made
through multipin DB-25 connectors located on the top of each module. The
output module also has a DB-9 connector.
The Insulation Displacement Connector System
The I/O wiring interface system is based on insulation displacement
technology. A special AMP wiring tool is included with each console; it is
auto-indexing,andallows individualwire connectionstobe positivelymade
with a single squeeze of the tool's trigger. The trigger action is ratchet
controlled,andwillnotreleaseuntilafullconnectionismade.Oncereleased,
themultipinconnectorheldinthetool'sjawautomaticallyindexestothenext
connector pin. The technology is such that no stripping, soldering or tinning
of wire ends is required; all that is needed is for the wires destined for the
connector be snub cut and laid out in order (although tubing should be used
onbaredrainwires).AnemptyDB-25(orinthecaseoftheoptionalLSR-500
rackmountline switcher,a DB-9)connectorisinsertedinto thetool, indexed
tothefirstpin,andthewiresareinsertedonebyoneintothejawandthetrigger
squeezed.Inthiswayasinglemultipinconnectorcanbecompletelywiredup
in a minute or two.
Intheeventofawiringerror,connector pinsmayeasilyberemovedfrom
the shell with the wire still attached, and inserted into the correct position.
Observe the side of the connector, with the metal part down. You will see a
rowof"Vees"—simplypressthetopoftheveetogetherwithascribeorother
sharpinstrument;thiswillunlockthepinfromtheshell,anditcanberemoved
and inserted into the correct position. Spread the vee apart to lock the pin in
the new position. It should never be necessary to discard a connector due to
a wiring error.
Note that mating hoods for each connector are also supplied with the
console. These have locking screws that hold the connectors securely to the
bottom of the console mainframe.
The AMP tool insulation dis-
placementconnectorsystem.
Notetherightanglehoodwith
self-locking tabs. The tool,
multipinconnectors(withgold
plated pins) and latching
hoodsaresuppliedwitheach
console.
A-2000 / Aug 2002

INSTALLATION and POWER
page 1 – 8
A-2000 / Apr 2001
ConnectionProcedures
Assuppliedfromthefactory,theconsolerequiresnologicconnec-
tions to function. Therefore an orderly installation begins with the
audio wiring. Note this manual is organized by module type (inputs,
outputs,monitor modules, etc.);each chapter containsdetailed wiring
instructions for its module type. Proceed through the manual, chapter
by chapter, until all modules have been wired to suit your particular
installation requirements. Once proper audio operation is verified, go
back to each individual chapter and proceed with control wiring.
Analog Insert Points
The MONO MIC INPUTS (MM-2000) have insert patch points in
their signal chains to allow outboard audio processing.
Normally these points are internally bridged at the factory (via
PCB-mounted programming dipswitch) prior to shipment. If you
intendtouseoutboardsignalloopsatthesepoints,youmustreprogram
this dipswitch. See page 2-3 (mic inputs).
Unbalanced Connections (analog audio)
ANALOG INPUTS — Wire to the console with typical shielded
twoconductorcable(likeBelden9451),justasifyouwereconnecting
abalancedsource.Attheunbalancedsourcemachine’soutput,connect
theblackwire(LOW)totheshield.Ifthemachinehasa-10dBuoutput,
don’t hesitate to turn module input gain as high as is needed.
ANALOG OUTPUTS — A-2000 consoles use an electronically
balancedoutputcircuit.Caremustbeexercisedwhenconnectingthem
toanunbalancedsystem.Whiletemporarilyshortingthelowsideofthe
output signal to ground will not cause any problems, continued
operation will result in increased distortion, decreased reliability, and
possible oscillation problems. If you must connect the output to an
unbalanced system, be sure to leave the low side unterminated, and
connect the unbalanced system to the high side output and shield
connections.
Modules Layout
The A-2000 console’s mainframe comes supplied with 22 input
modules,anoutputmodule,acontrolroom/studiomodule,andastudio
two module. Each module type has its assigned slot (see drawing on
page 1-9). Also there can be optional modules: a superphone module,
alineselect module, and a tape remotemodule.Optional modules can
be placed in any input slot.
A-2000 / Sep 2002

AUD TRIM
LT
MONO
TRIM
LT
HOLD
METERS
SWITCHED
S/ S
A TOU
RT
RT
EX T
W# 003502
PGM
MXM
10
9
8
7
64
3
2
1
0
5
C U E
B
I/O
A
I/O
MASTER
CUE
MONO
MXM
AUD
PGM
ES TR E
SELECT
TIMER 10
9
8
7
64
3
2
1
0
5
CR
10
9
8
7
64
3
2
1
0
5
10
9
8
7
64
3
2
1
0
5
ST UD I O
TB
W# 003505
B
I/O
A
I/O
TB GAIN TRIM
CR / STUDIO
H D P N
EXT 1
EX T 2
AUD
MONO
PGM
MXM
SELECT
D
I
P
S
W
CR CUE LT
CR CUE RT
HDPN CUE
CR MUTE
ST DIM LT
ST DIM RT
ST MUTE
10
9
8
7
64
3
2
1
0
5
W# 003506
TB 2
2
TB 2
10
9
8
7
64
3
2
1
0
5
10
9
8
7
64
3
2
1
0
5
H D P N 3
H D P N 2
B
I/O
A
I/O
GAIN TRIM
D
I
P
S
W
EXT 1
EX T 2
AUD
MONO
PGM
MXM
SELECT
ST2 DIM LT
ST2 DIM RT
STUDIO TWO
ST UDI O
HDPN3 CUE LT
HDPN3 CUE RT
HDPN2 CUE
HDPN3 MUTE
ST2 MUTE
I/O
STOP
REC
RTZ
FF
EWR
APL Y
W# 003508
TAPE REMOTE
1
2
3
4
5
6
B
I/O
A
I/O
W# 003507
PRESELECT
SOURCE
NOTE: 1. CONSOLE CAN ACCOMMODATE UP TO 23 INPUT OR ACCESSORY MODULES IN ANY COMBINATION.
2. OPTIONAL MODULES—SUPERPHONE, LINE SELECT, AND TAPE REMOTE—CAN BE PLACED IN ANY SLOT POS.1-23.
A-2000 CONSOLE - MODULES LAYOUT page 1 - 9
A-2000 / Apr 2001
MIC GAIN TRIM
A
B
D
I
P
S
W
NO
I/O
ASSIGN
W# 003501
A
B
MONO INPUT
AUD
MONO
PGM
MXM
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
PHANTOM
INSERT
0
10
15
00
20
30
4O
50
60
70
5
MIC GAIN TRIM
A
B
D
I
P
S
W
NO
I/O
ASSIGN
W# 003501
A
B
MONO INPUT
AUD
MONO
PGM
MXM
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
PHANTOM
INSERT
0
10
15
00
20
30
4O
50
60
70
5
MIC GAIN TRIM
A
B
D
I
P
S
W
NO
I/O
ASSIGN
W# 003501
A
B
MONO INPUT
AUD
MONO
PGM
MXM
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
PHANTOM
INSERT
0
10
15
00
20
30
4O
50
60
70
5
MIC GAIN TRIM
A
B
D
I
P
S
W
NO
I/O
ASSIGN
W# 003501
A
B
MONO INPUT
AUD
MONO
PGM
MXM
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
PHANTOM
INSERT
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PG M
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PG M
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
LINE GAIN TRIM
LT
CUE
START
D
I
P
S
W
I/O
RT
W# 003500
STEREO INPUT
A
B
AUD
MONO
PGM
MXM
ASSIGN
LOCAL OFF
TIMER RST
MUTE 1
MUTE 2
TB
0
10
15
00
20
30
4O
50
60
70
5
CALLER GAIN TRIM
1 2
1
2
I/O
10
0
5
15
00
20
30
4O
50
60
70
W# 003504
CALLER INPUT
CUE
AUD
MONO
PGM
MXM
NO
ASSIGN
D
I
P
S
W
TIMER RST
MUTE 1
MUTE 2

INSTALLATION and POWER
page 1 – 10
A-2000 / Apr 2001
Wiring Procedure - Double Connection to One Pin
ref: DB-25 male multi-pin connector
Most audio equipment machine interfaces (as well as Wheatstone consoles) use
subminiature D-type connectors. Sometimes the interfaces require making two connec-
tions to a single DB pin. If the wiring has been set up using punchblocks, this is not a
problem; however, for situations where direct machine-to-console wiring is used, Wheat-
stone recommends the following procedure:
1) Connect the first wire to the desired pin as you normally would.
2) Note connector pins may easily be removed from the DB-25 shell with the wire still
attached: Hold the connector with the metal part down and observe its side. You
will see a row of "Vees"—simply press the top of the selected vee together with a
scribe or other sharp instrument; this will unlock the pin from the shell, allowing
it to be removed.
3) With the pin removed, strip out a short section of insulation from the connected
wire and wrap and solder the second wire to the first as shown above.
4) A short piece of heatshrink tubing (pictured here before being slid into place)
completes the connection.
5) Re-insert the pin into the DB-25 shell, spreading the vee apart to lock it in place.
A-2000 / Aug 2002

page 2 – 1
A-2000 / Apr 2001
MONO MIC INPUT MODULE
Mono Mic Input Module
(MM-2000)
Chapter Contents
Module Overview........................................................................ 2-2
Internal Programming Options ................................................. 2-3
Insert Bypass .......................................................................................................... 2-3
Phantom Power ...................................................................................................... 2-3
Mutes ...................................................................................................................... 2-3
Timer Restart .......................................................................................................... 2-3
Local/Ready ............................................................................................................ 2-3
Talkback.................................................................................................................. 2-4
Hook-ups..................................................................................... 2-4
AUDIO CONNECTIONS..................................................................................... 2-4
CONTROL CONNECTIONS .............................................................................. 2-5
Remote ON & OFF ........................................................................................... 2-5
Cough ............................................................................................................... 2-5
External START & STOP ................................................................................. 2-5
Ready ............................................................................................................... 2-6
Talkback to Control Room................................................................................ 2-6
On Tally ............................................................................................................ 2-6
Tally B ............................................................................................................... 2-6
DB Connector Pinout Drawing.................................................. 2-7

page 2 – 2
A-2000 / Apr 2001
MONO MIC INPUT MODULE
Mono Mic Input Module
(MM-2000)
Module Overview
MM-2000 modules are for microphone input signals (-50dBu nomi-
nal).Eachmoduleacceptstwomonosources:AandB,switchedatthetop
of the module.
Phantom power is available at both input ports; it may be selectively
activatedbyadipswitchSW1pos2(thefactorydefaultisOFF).Recessed
frontpanelmulti-turntrimpots(range38dB)adjusttheleveloftheA and
B inputs independently.
Example: with a microphone input of –60dBm @150Ωat the port, gain
trim can set levels from -22dBu to +16dBu (note maximum preamp gain is
+76dB).
An analog insert point (+4dBu balanced) is provided: it is post-trim
and may be bypassed by a dipswitch SW1 pos1 (the factory default is
BYPASSED).
Outputswitches assignthe selectedsourcesignaltoany combination
of the console’s four outputs: two stereo outputs—PGM (program) and
AUD (audition); and two mono outputs—MONO and MXM (mix-
minus). Note that the assignment to the MXM output is post-fader, pre-
on, while the other assignments are post-fader, post-on.
Level is set by a long-throw fader.
The channel ON and OFF switches are at the bottom of the module.
In addition to being controlled remotely, these can also be programmed
(viadipswitch) to performa variety ofconsolecontrol functions, includ-
ing activating control room and studio mutes, external tallies, and timer
restart.
All audio and control input and output signals are made via a multi-
pin DB-25 connector mounted on the top of each individual module and
located underneath the hinged meterbridge.
MM
MMIIIICC CC GG GGAA AAIIIINN NN TT TTRR RRIIIIMM MM
AA
AA
BB
BB
NN
NN
OO
OO
IIII//
//OO OO
WW
WW## ## 00 0000 0033 3355 5500 0011 11
AA
AA
BB
BB
MM
MMOO OONN NNOO OO IIIINN NNPP PPUU UUTT TT
AA
AAUU UUDD DD
MM
MMOO OONN NNOO OO
PP
PPGG GG MM MM
MM
MM XX XXMM MM
AA
AASS SSSS SSIIIIGG GGNN NN
00
00
11
1100 00
11
1155 55
00
00
00
00
22
22 00 00
33
33 00 00
44
44OO OO
55
5500 00
66
66 00 00
77
7700 00
55
55
DD
DD
IIII
PP
PP
SS
SS
WW
WW
LL
LLOO OOCC CCAA AALL LL OO OOFF FFFF FF
TT
TTIIIIMM MMEE EERR RR RR RRSS SSTT TT
MM
MMUU UUTT TTEE EE 11 11
MM
MMUU UUTT TTEE EE 22 22
TT
TTBB BB
PP
PPHH HHAA AANN NNTT TTOO OOMM MM
IIIINN
NNSS SSEE EERR RRTT TT

page 2 – 3
A-2000 / Apr 2001
MONO MIC INPUT MODULE
Internal Programming Options
Internal programming for the mono mic module is made via printed
circuit board (PCB) mounted dipswitch SW1 located on the top of the
module (beneath the DB-25 connector). Note that when a dipswitch
position is thrown to the right it is ON.
Insert Bypass
DipswitchSW1position1willbypassthemodule’sinsertpointinand
out of the audio signal chain. Note that the factory default is “insert
bypassed”. In other words, when shipped from the factory SW1 position
1 is thrown to the right.
Phantom Power
Dipswitch SW1 position 2 turns phantom power on for the module’s
two microphone input ports.
Mutes
When a microphone is live in a room, that room’s monitor speakers
must be muted to prevent feedback. The A-2000 console has two mute
controllines: control room/HDPN 3 andstudio/studio two. Eachof these
isactivatedbyanAmicrophoneinput.ThedipswitchSW1programsthese
muting functions:
SW1 position 4 mutes the studio/studio two when source A is ON
SW1 position 5 mutes the control room/HDPN 3 when source A is
ON
Timer Restart
The console’s digital timer can be programmed to automatically reset
to zero and begin counting up when the module’s ON button is pressed.
SW1 position 6 activates timer restart
Local/Ready
The module’s channel OFF switch normally has its LED indicator
controlled by the switch itself (Local). This is the factory default setting.
However, should you wish to have the LED function as a Ready light for
anexternalsourcemachine,dipswitchSW1position7,whenthrowntothe
left, passes control to the Ready input on the module’s DB-25 connector.
AclosurebetweentheReadyinput(DB-25pin2)andDigitalGround(DB-
25 pin 19) will activate the OFF switch LED. As long as the closure is
maintained, the LED will be lit.
Note the factory default
settingforphantompower
is OFF.
A-2000 / Aug 2002