Speck SSM-24 User manual

Operation Manual
Synth and Line Mixer
lModel SSM-24
lModel SSMEX-16
lModel SSMEX-32
MODEL SSM

Speck Electronics makes no warranty of any kind with regard to this material,
including, but not limited to, the implied warranties of merchantability and
fitness for a particular purpose. Speck Electronics shall not be liable for errors
contained herein or for incidental consequential damages in connection with the
furnishing, performance, or use of this material.
This document contains proprietary information which is protected by
copyright. All rights are reserved. No part of this document may be
photocopied, reproduced, or translated into another language without the prior
written consent of Speck Electronics.
The information contained in this document is subject to change without notice.
Speck Electronics products are warranted to the original owner to be free of
defects in material or workmanship.
This warranty does not apply to incandescent lamps, slide potentiometers, or
any product subject to accident, misuse, neglect or failure to comply with
normal maintenance procedures or if the serial number has been defaced,
altered, or removed; nor will Speck Electronics accept responsibility for
damages resulting from improper installation, alteration or unauthorized parts
or repairs. If the product is modified by the customer without permission, the
customer agrees to pay for parts and labor necessary to remove the modification
before repair. The cause of the defect is in the sole judgment of Speck
Electronics.
Should a defect develop within one year of purchase from Speck Electronics or
an authorized dealer, Speck Electronics will supply the part or parts necessary
at no charge. Labor is covered in this warranty for a period of one year.
Outside service, repairs or pickups are not covered under this warranty.
Any item returned for warranty repair should be sent, if possible, in the original
packing container, prepaid to Speck Electronics, 925 S. Main Street, Fallbrook,
California, 92028. If in our opinion the packing container is improper for
return shipping, we reserve the right to supply a new container at a minimal
charge.
In the interest of improving Speck Mixers and related products; designs and
specifications are subject to change without notice. It should be mentioned that
if a change is necessary for any reason, we make every effort to document
that change and send an "update notice" to all customers at no charge.
First Printing - April 1990
Edition 2 - July 1994
Edition 3 - April 1997
Notice
Warranty
ii
Edition

Contents iii
General ......................................................................................
Operator Safety Summary .........................................................
Power Source ......................................................................
Grounding the product ........................................................
Use the proper power cord ..................................................
Use the proper fuse .............................................................
Panels and Covers ...............................................................
Ground Terminal..................................................................
General Description ...................................................................
Input section ........................................................................
Effects section .....................................................................
Master section .....................................................................
Features .....................................................................................
Standard Accessories .................................................................
Regulated power supply ......................................................
Rack mount adapters ...........................................................
Interface Harness .................................................................
Optional Accessories .................................................................
SSM 16 Input Expander ......................................................
Assign 28 Subgroup Module ...............................................
Microphone Preamps ..........................................................
Rack Mount Slide/Tilt Adapter ...........................................
Expression Pedal Harness ...................................................
Specifications ............................................................................
Unpacking and Inspection .........................................................
Environmental Considerations ..................................................
Grounding ...........................................................................
Rack grounding ...................................................................
Repacking for Shipment ............................................................
Chapter 2 Initial Preparation
Contents
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11
Chapter 1 Introduction

Contents
Chapter 4 Operation
Chapter 3 Installation
General ......................................................................................
Mechanical Installation .............................................................
Physical Placement of Adjacent Equipment ..............................
Power supply .............................................................................
Mounting location ...............................................................
Configuring the AC .............................................................
AC wiring chart ...................................................................
Fuse chart ............................................................................
Connecting the Power Supply ...................................................
Power Supply DC pin assignment .......................................
Ground terminal ..................................................................
Rack Mount Adapters ................................................................
Installation ..........................................................................
Optional Slide/Tilt Rack Adapters .............................................
Default Control Settings ............................................................
Cleaning ....................................................................................
Interfacing Expanders ................................................................
Mounting location ...............................................................
Installing the Interface Cable ..............................................
Expander pin assignment ....................................................
Interfacing the Assign 28 ...........................................................
Mounting location ...............................................................
Connecting the Assign 28 ...................................................
Expression Pedal .......................................................................
Connecting the Cable ..........................................................
Expression Pedal Enable Switch .........................................
Pedal connector pin assignment ..........................................
General ......................................................................................
Front Panel Controls ...............................................................
Input Channel ............................................................................
Equalizer Section .......................................................................
Effects Send and Return Section ...............................................
Master Section ...........................................................................
Stereo Cue Return Section .........................................................
Mono Click Return Section .......................................................
Stereo Aux Return Section ........................................................
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iv

Contents
Rear Panel Controls ................................................................
Input Channel Connections and Switches .................................
Effects Send and Return Connections .......................................
Master Input/Output Connections ..............................................
Stereo Cue Return Section .........................................................
Mono Click Return Section .......................................................
General ......................................................................................
Start simple .........................................................................
Audio Cable ...............................................................................
Multipair wire harnesses .....................................................
Connectors .................................................................................
Proper AC Grounding ................................................................
Quality AC system ..............................................................
AC distribution ....................................................................
Clock noise and AC ............................................................
Safety earth connection .......................................................
Electronics earth ..................................................................
Proper Audio Grounding and Shielding ....................................
EMI and RFI ..............................................................................
Sources of EMI ...................................................................
Reducing EMI .....................................................................
Balanced to Unbalanced Connections .......................................
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Chapter 5 Wiring and
Other
v

1
Thank you for purchasing our Model SSM Synth and Sampler Mixer.
The Model SSM was designed from the ground up as a high
performance mixer dedicated to the professional synth player.
The Model SSM has operational features that are unique to our products
and are somewhat technical in nature. We hope this manual is easy to
understand. If you have any questions regarding the Model SSM or any
Speck product, do not hesitate to contact Speck Electronics. Our phone
number is [phone].
This product and its power supply are intended to operate from an AC
power source that does not apply more than 240 Volts RMS between the
supply conductors or between either supply conductor and ground.
The external power supply for the Model SSM is grounded through the
grounding conductor of the power cord. To avoid electrical shock, plug
the power cord into a properly wired receptacle before making any audio
connection to the mixer. A protective ground connection, by way of the
grounding conductor in the power cord, is essential for safe operation.
Upon loss of the protective ground connection, all accessible
conductive parts, including knobs and controls that may appear to be
insulating, can render an electric shock.
Use only the power cord and connector that is supplied with your power
supply. The power cord must be in good condition.
To avoid a fire hazard, use only a fuse of the correct type, voltage rating
and current rating as specified on the chassis of the power supply and
this manual.
Two fuses are required for the operation of the Model SSM. One fuse is
for the main mixer and optional expander (if installed), and the other is
for the headphone circuit on the main mixer.
Refer to the section in this manual regarding specific details on fuses.
General
Power source
Operator Safety
Summary
Grounding the product
Use the proper power cord
Use the proper fuse
Introduction
Chapter 1 Introduction Section

2
Figure 1. Front Panel Layout
Chapter 1 Introduction Section

Figure 2. Rear Panel Layout
3
Chapter 1 Introduction Section

To avoid personal injury, do not remove the cover from the power
supply, or the rear panel of the Model SSM or optional Expander.
Never operate the external power supply without the covers and panels
properly installed. If it becomes necessary to remove the rear panels of
the SSM or optional Expander for service, always unplug the AC power
and disconnect the DC interface cable before proceeding.
A grounding terminal is available at the rear of the SSM and the optional
Expander. This terminal is available when a star grounding technique is
employed as part of a larger wiring system. The ground terminal must
not be used as a substitute for the power supply's AC grounding
conductor.
The Model SSM is a dedicated synthesizer and sampler audio mixer that
may be used separately or as part of a larger mixing system.
When used as a traditional synth and sampler rack mixer, the Model
SSM provides up to 56 synth inputs (28 stereo inputs), and the ability to
access up to 8 stereo effects devices. The SSM has a comprehensive
master section that allows the synth player to maintain total control over
all equipment connected to the mixer.
The mixer is divided into three basic sections. The input section, the
effects send and return section, and the master section. The optional
Expander has 16 input channels identical to that of the main mixer.
The input section consists of 12 input channels that are available as
either mono input or stereo inputs. The input channels have all the
controls necessary to effectively control synth and sampler operation.
Channels include synth trim, sweepable equalization, independent
effects sends, a pan/balance control, the ability to mute or solo the
signal, and an overall level control. The rear panel for each input
channel offers 1/4" T.R.S (tip, ring, sleeve) balanced connectors for
synth or sampler interface, as well as 1/4" connectors for direct outputs
and patch points.
The optional Expander has 16 input channels that are available as either
mono or stereo inputs. Its features are the same as those mentioned
above.
Do not remove covers or panels
General Description
Input section
4
Ground Terminal
Chapter 1 Introduction Section

The effects section provides total control for up to 8 stereo effects
devices.
Each of the effects channels include an effects send master and
associated solo. The effects return includes a stereo effects return level,
pan, in-place solo, and mute. Each effects channel has a 1/4" send jack
and two 1/4" jacks for the left and right effects returns.
The master section provides the SSM with many choices for routing
and controlling the synth signals from the input section and effects
devices from the effects section.
The master section includes a stereo program, stereo monitor, and stereo
headphone controls. The stereo cue, stereo aux, and mono click return
sections allow a variety of signals to be mixed with the synth signals to
the monitor and headphone outputs. The master section provides a full
compliment of 1/4" and XL type input and output connectors that allow
the SSM to adapt to a wide range of professional situations.
The SSM mixing system is available in three models: the SSM-24, 12
stereo input channels; the SSMEX-16 Expander, 16 mono channels;
and the SSMEX-32 Expander, 16 stereo input channels.
The mixers can be rack mounted vertically or horizontally using the
optional slide/tilt accessory. This can save up to five rack spaces.
The "Zero flex" integrated chassis design is virtually impervious to rack
stresses.
Eight discrete effects sends per channel are complimented by eight
stereo effects returns.
Each stereo or mono input channel employs a unique channel "Kill"
switch that deletes the dry input signal from the stereo program but
leaves all other functions, such as the effect send and channels direct
outputs, active.
Presence of signal LED's show which inputs are active at a glance.
Impedance balanced patch points allow for long connections to a passive
stereo volume pedal for dynamic control of the entire mix.
A separate tuner output follows the solo for quick isolation.
Master section
Features
5
Effects section
Chapter 1 Introduction Section

The SSM is supplied with an external rack mount power supply that is
capable of powering the Model SSM main unit and one additional
Model SSM 16 input channel expander.
The SSM requires the Model PS3-1.5 regulated power supply.
The power supply is supplied with a 6 foot, 3 conductor AC power
cord and a 8 foot shielded DC cable. The DC cable has a circular
locking connector that insures a positive connection to the SSM.
The Model SSM and optional Expander are supplied with a set of rack
mount adapters. If the intention is to mount the SSM in a standard 19"
equipment rack, these adapters must be mounted to the left and right
sides of the mixer.
The optional 16 channel SSM Expander is supplied with a 6' interface
harness. This harness is required to connect the Expander to the Main
Unit. The harness consists of high quality, shielded multiconductor
cable with 38 pin Elco connectors attached at each end. Shorter cable
lengths are available from the factory.
The Model SSM is prewired for input expansion. With the addition of
the 16 input Expander and its interface harness, a SSM Mixing System
may be expanded to a total of 28 positions (56 inputs).
Expanders are available in two versions: the SSMEX-32, 16 stereo
channels; and the SSMEX-16, 16 mono channels. All input channel
functions, stereo or mono, are identical to those found on the main SSM
mixer.
The Assign 28 is an assign/subgroup module that is designed as an
output expander for the Model SSM series mixers. The Assign 28
allows multiple sample drum sounds or multi-synth patches to be
combined and discretely bussed in a recording console fashion, but with
dedicated effects.
Standard Accessories
Regulated power supply
Interface Harness
(Expander only)
Rack Mount Adapters
Optional Accessories
SSM 16 Input Expander
Assign 28 Subgroup Module
CAUTION!
IMPORTANT!
ALWAYS CHECK THE PROPER OPERATING
VOLTAGE BEFORE OPERATING THE SSM.
USE ONLY THE POWER SUPPLY THAT IS
SPECIFIED FOR YOUR PRODUCT.
6Chapter 1 Introduction Section

This three rack space module incorporates 28 stereo or mono assign
banks, 8 master outputs, 8 stereo effects returns, a complete monitoring
section, and a stereo grand master feed.
Any mono or stereo input channel from the Model SSM may be
assigned to any of eight buss outputs. The eight busses may be used as
individual outputs or as stereo groups. The eight busses have an
associated level control and may be muted with a master kill switch. The
8x2 monitor section provides an isolated solo capable mix of the eight
busses to the SSM for complete monitoring flexibility. Eight stereo
effects returns may be used in conjunction with, or in addition to the
SSM's existing effects returns.
Mono input channels are available with microphone preamps as an
option. Channels with mike preamps incorporate a high quality
microphone transformer, a XL type input connector, and a Mike/Synth
select switch. Any quantity may be ordered and may be installed in any
input position of the Main Unit or the Expander. Mike preamps are not
available on stereo input channels.
The SSM main unit or 16 channel Expander may be fitted with an
optional rack mount slide and tilt mechanism in place of the standard
vertical mount rack adapters.
The slide/tilt option will allow the SSM to be mounted flat, like a sliding
drawer, and moved in and out of a standard 19" equipment rack. When
moved to the front of the rack, the mixer may be tilted and locked into a
0, 45 or 90 degree position. For traveling, the mixer may then be pushed
back into the rack in its flat horizontal position.
An optional wire harness is available to connect the Model SSM to a
stereo volume pedal (not available from Speck). This 20' harness is
wired with a 6 pin DIN connector at one end and four 1/4" plugs at the
other end. The use of the expression pedal allows the operator a "What
you hear, is what you get" master volume control adjustment from the
stereo program, monitor and headphone outputs of the SSM.
Microphone preamps
Rack mount Slide/Tilt adapter
Expression pedal harness
7
Chapter 1 Introduction Section

Specifications
8
Synthesizer Input Impedence
Patch Point Return Impedence
Effects Return Input Impedence
Cue Return Input Impedence (Unbalanced)
(Transformer Isolated)
Click Return Input Impedence (Unbalanced)
(Transformer Isolated)
Aux Return Input Impedence
Microphone Input Impedence (Optional)
Patch Point Output Impedence
Direct Out Impedence
Effect Send Output Impedence
Program Feed Output Impedence
Monitor Feed Output Impedence
Tuner Feed Output Impedence
Synth Input Level
Patch Point Input Level (High Level Synth)
Effects Return Input Level
Cue Return Input Level
Click Return Input Level
Aux Return Input Level
Microphone Input Level
Normal
-20dBu
0dBu
+4dBu
+4dBu
0dBu
+4dBu
-50dBu
Maximum
+15dBu
+21dBu
+21dBu
+21dBu
+21dBu
+21dBu
+5dBu
10k Ohms
10k Ohms
10k Ohms
10k Ohms
600 Ohms
10k Ohms
600 Ohms
10k Ohms
150 Ohms
All line outputs are designed to drive
a 600 ohm load and may be operated
into any load 600 ohms or greater.
Direct Output Level
Program Feed Output Level
Monitor Feed Output Level
Effects Send Output Level
Tuner Feed Output Level
Transmitter Feed Output Level
Headphone Output Level
Normal
+4 dBu
+4 dBm=0VU
-18dBm=0VU
+4dBu
+4dBu
+4dBu
-10dBu
Maximum
+21dbu
+21dBm
+21dBm
+21dBu
+21dBu
+21dBu
+21dBu
4 Watts
Output Distortion(THD+n)
Normal
.005%@+4dBm
Maximum
.0072%@+22dBm
Frequency Response
(Synth In to Program Out)
12Hz(-3dB) to 160kHz(-3dB)
18Hz (-.5dB) to 140kHz (-.5dB)
Test Conditions:
-10dBu signal at synth input.
Input slide fader set at #10 position.
Trim control set fully clockwise.
Equalizer In/Out swtich set to Out.
Program master adjusted to indicate 0 VU.
Frequency response measured at program feed-left
with a high quality AC voltmeter.
Chapter 1 Introduction Section

Specifications (Cont.)
9
Residual Noise Measurement
(Synth In to Program Out)
-82dBu
Test Conditions:
-10dBu signal at synth input.
Input slide fader set to #10 position.
Pan pot centered.
Adjust program master to indicate 0VU (+4dBm)
at program feed jack-left.
Input signal removed and terminated with 10k
ohms.
Noise measured at program feed-left with a
unweighted filter.
Power requirements (Mixer)
Power requirements (Power Supply)
Bi-polar 16.5 volts DC, 1.3 Amp
120 VAC, 1.0 Amp
Dimensions - SSM Main Unit
Dimensions - SSM Expander
Dimensions - Power Supply
HxWxD = 15.75" x 19" x 4.25"
(400mm x 483mm x 108mm)
HxWxD = 15.75" x 19" x 4.25"
(400mm x 483mm x 108mm)
HxWxD = 3.75" x 11.25" x 5.25"
95mm x 286mm x 133mm)
Shipping weight - SSM Main Unit
Shipping weight - SSM Expander
Shipping weight - Power Supply
Approximately 32 lbs (14.4Kg)
Approximately 30 lbs (13.5Kg)
Approximately 10 lbs (4.5 Kg)
Low Band Equalization
Mid Band Equalization
High Band Equalization
50Hz-500Hz, 15dB Boost or Cut
500Hz-5kHz, 15dB Boost or Cut
5kHz-15kHz, 15dB Boost or Cut
Chapter 1 Introduction Section

Chapter 2 Initial Preparation 10
The Model SSM is delivered in a special, protective container and was
carefully inspected both mechanically and electrically before shipment.
It should be physically free of mars and scratches and in perfect
electrical order upon receipt. To confirm this, the product should be
inspected for physical damage that may have occurred in transit. Any
damage should be reported to your dealer and delivery company as
soon as possible.
The Model SSM will operate satisfactorily over a wide range of
ambient temperatures, and the power supply will operate from 10 to 50
degrees C. If the power supply is installed in an equipment rack that
also contains heat producing equipment such as power amplifiers or
other power supplies, adequate ventilation should be provided. This will
prolong component life and maximize operational stability.
While the internal circuitry of the SSM is fully shielded by the steel
chassis, installation should nevertheless be planned to avoid locating the
SSM, optional SSM Expander, or any low level audio equipment
immediately adjacent to power amplifiers, power supplies, or any source
of Electromagnetic emissions.
To protect operating personnel, the National Electrical
Manufacturers Association (NEMA) recommends that the
instrument panel and rack cabinet be grounded. All Speck power
supplies are equipped with a three conductor power cord which, when
plugged into an appropriate receptacle, grounds the power supply. The
offset pin on the power cord's three-prong plug is the ground wire.
The three conductor line cord and plug assembly is wired in
accordance with NEMA convention (line - black, Neutral - white, and
safety earth - green). Audio signal grounds and DC grounds from the
mixer are isolated from the AC safety earth.
When using the Model SSM and its power supply outside North
America, it will be necessary to adapt a different power plug for that
specific country.
Unpacking and
Inspection
Grounding
Environmental
Considerations
Initial
CAUTION! DO NOT REMOVE, DEFEAT, OR DISABLE THE
SAFETY EARTH TERMINAL ON THE POWER
CORD. DO NOT USE A GROUND LIFT ON THE
POWER SUPPLY.

Chapter 2 Initial Preparation
Merely affixing the Model SSM or optional SSM Expander into an
equipment rack is no guarantee that the product is making a reliable
ground connection. The mounting rails in the equipment rack should
never be depended upon for a ground connection.
The following information is provided as a general guide for
repackaging your Model SSM for shipment. If you have any questions,
contact your local Speck Dealer or Speck Electronics direct. Our phone
number is [phone].
If the product is to be shipped to Speck Electronics for service or repair,
attach a tag to the product, identifying the owner and indicating the
service or repair to be accomplished. Include the model number and
serial number of the product. Place the product in the original container
if available. If the original container in not available, a suitable one can
be purchased from Speck Electronics.
If the original container is not used, wrap the product in heavy plastic
before placing in an inner container. Use plenty of packing material
around all sides of the product and protect panel faces with cardboard
strips. Mark shipping container with "Delicate Instrument" or "Fragile",
and insure the shipment for the proper amount.
In most cases, it will be necessary to remove the rack mount
adapters if the unit is returned in its original shipping container. When
remounting the rack mount adapters, make certain you use the original
mounting screws supplied with the Model SSM.
Repacking For
Shipment
11
Rack grounding

Chapter 3 Installation Section 12
The following information should give you the basics on how to install
the Model SSM Main Unit, optional SSM Expander, and Model PS3
Power Supply. The proper installation of the SSM as a part of a larger
system requires a clear understanding of audio wiring, AC distribution,
grounding, and shielding techniques.
When the Model SSM is being installed into a larger system it may be
necessary to retain the services of someone experienced in these matters.
Before the mixer may be placed into its normal operating position, it
will be necessary to install the appropriate rack mount adapters.
The Model SSM may be installed in the vertical position using the
standard 19" rack mount adapters or may be mounted in a horizontal
(flat) position using the optional slide/tilt rack sliders. The mixer may
be installed into any 19" wide equipment rack that uses standard E.I.A.
universal spacing. The SSM and optional Expander may be affixed to
standard E.I.A. rack rails using (8) 10-32 machine screws.
The location of the SSM and Expander should be such that the operator
has a clear, unobstructed view of the front panels from his normal
operating position. The unit should also be within easy reach of the
operators normal position in order to facilitate the use of the front panel
controls.
Any device that emits a high EMI (Electro Magnetic Interference) or
RFI (Radio Frequency Interference) energy field should be treated with
suspicion. EMI is considered any unwanted signal which adversely
affects the operation of the mixer or the mixing system. This subject is
discussed in Chapter 5.
Electronic equipment such as power amplifiers, power supplies
(especially wall mount type), video monitors, computers, certain synths
and samplers must be located away from the SSM Main Unit, the SSM
Expander, Assign 28, and their associated cables. It may be necessary to
alter the positions of certain equipment that you feel would cause buzzes
or hums in the mixer system.
General
Mechanical Installation
Installation
Physical Placement of
Adjacent Equipment

Chapter 3 Installation Section
Power Supply The Model SSM is supplied with the Model PS3-1.5 power supply that
offers a variety of mounting options. The power supply may be placed
on any flat surface, permanently affixed to a flat surface, or mounted on
a single rack rail with the optional rack mount adapter.
One of the primary reasons that the power supply of the SSM is external
is to insure that the power transformer enclosed within the power supply
chassis maintains a safe distance from the active electronics of the SSM
and the Expander. For that matter, any power supply (especially the
small wall mount supplies), power amplifiers, or any strong power field
device should be kept at a reasonable distance from the SSM and
Expander. It is also important to keep the above mentioned devices clear
of all interface cables, audio cables and harnesses.
The external power supply for the SSM does not provide an AC power
switch. It is recommended the power supply be plugged into an AC
strip that uses a power switch.
The power supply should not be installed directly above or below the
mixers. It is recommended that it be installed in the rear of the
equipment rack, providing that it remains at a reasonable distance from
the mixers and cables, and has adequate ventilation.
The power supply normally generates a small amount of heat during
operation. It is important that adequate ventilation is provided when
planning the mounting location.
The power supply may be wired to operate with 120 VAC, 220 VAC,
230 VAC, or 240 VAC 50/60hz. Before applying AC power, you
should verify that the voltage setting on your power supply is configured
to match the AC requirements of your country. This procedure should
be performed and checked by a qualified technician.
Unless otherwise specified on the panel of the supply, the power supply
is wired for 120 VAC 50/60Hz operation and uses a North American
style AC plug.
To gain access to the inside of the power supply, it will be necessary to
remove the top cover. This is accomplished by removing the 4 screws on
the bottom of the power supply chassis. Make certain that the power
supply is unplugged from the AC before proceeding.
Mounting location
Configuring the AC
13

Chapter 3 Installation Section
There are five terminals available on the power transformer of the power
supply. The configuration of the five terminals determines the operating
voltage of the power supply. It is only necessary to change the black
(line) and white (neutral) AC wires. Do not attempt to remove or
change the Green AC safety wire or the multicolored wires used at the
DC terminals. It is recommended that you measure the DC voltages at
the circular DC connector before reconnection to the mixer.
The following chart represents the proper AC terminal configuration for
the Model PS3-1.5 power supply.
The following chart represents the proper fuse rating for the
Model PS3-1.5 power supply. All fuses are 3AG Slow-Blow type.
AC wiring chart
14
Fuse chart
FOR USE AT:
JUMPER AT:
APPLY AC AT:
120 VAC
1 & 3
2 & 4
4 & 1
220 VAC
2 & 3
1 & 5
230 VAC
2 & 3
4 & 1
240 VAC
2 & 3
4 & 1
120 VOLTS AC
220 VOLTS AC
230 VOLTS AC
240 VOLTS AC
1 AMP
.5 AMP
.5 AMP
.5 AMP
CAUTION! ALWAYS CHECK THE PROPER OPERATING
VOLTAGE BEFORE OPERATING THE SSM.
CAUTION! DO NOT REMOVE, DEFEAT, OR DISABLE THE
SAFETY EARTH TERMINAL ON THE POWER
CORD. DO NOT USE A GROUND LIFT ON THE
POWER SUPPLY.

Chapter 3 Installation Section
Connecting the
Power Supply
Before connecting the circular DC power supply connector to the SSM,
make certain the power supply is not plugged in.
To connect the power supply to the main mixer, fit the circular
connector from the DC power supply cable to the circular chassis mount
receptacle mounted at the rear of the Model SSM. The respective
connectors are keyed so the plug and chassis mount receptacle can fit in
only one direction. When the connectors have been mated, rotate the
circular lock clockwise until it stops.
The following chart represents the DC voltages available at the 9 pin
circular connector on the Model PS3 power supply.
A grounding terminal is provided just below the circular power supply
receptacle on the SSM main unit, and immediately to the left of the
interface connector on the SSM expander.
The grounding terminal should be used when it is necessary to connect
the SSM and Expander to a qualified ground. This ground terminal
should not be relied upon as a source of ground for other electronic
equipment. The ground terminal must not be used as a substitute for the
power supplies AC grounding conductor.
In order to install the SSM in a 19" equipment rack, it will be necessary
to attach the two rack mount adapters to the main chassis of the SSM
and optional Expander. Each rack mount adapter is attached to the main
chassis of the mixer with four 6-32 x 3/16" Phillips machine screws.
Using a Phillips screwdriver, remove the eight screws installed on both
sides of the mixer. Position the adapters so the side with the small round
holes match the threaded holes on the sides of the SSM, and the side
with the oval shaped holes are towards the front panel of the mixer.
Power supply DC pin-outs
PIN 1 - DC COMMON (AUDIO)
PIN 2 - MINUS 16.25 VDC (AUDIO)
PIN 3 -
PIN 4 -
PIN 5 -
PIN 6 - PLUS 16.25 VDC (AUDIO)
PIN 7 -
PIN 8 -
PIN 9 -
15
Rack Mount Adapters
Installation
Ground Terminal