CM16a
Amplifier Network Monitor
HARDWARE MANUAL
*TD-000086-00*
TD-000086-00
Rev. B
Download from Www.Somanuals.com. All Manuals Search And Download.
TABLE OF CONTENTS: CM16a Amplifier Network Monitor
Section 1: INTRODUCTION
Overview...................................................................................................5
Physical Characteristics & Layout........................................................6
List of Functions & Features...................................................................8
Block Diagram.........................................................................................9
Detailed Description of Functions.......................................................11
Network Description.............................................................................14
Network Examples................................................................................15
Section 2: INSTALLATION
Basics:
Unpacking............................................................17
What is Included.................................................17
Location Considerations....................................17
Mounting the CM16a..........................................17
AC Power..............................................................18
Audio Inputs.........................................................19
Page Input............................................................20
RLY/TRG Input......................................................20
RLY Output............................................................20
Monitor Chain In/Out..........................................20
10BASE-T Input/Output........................................21
RS-232 Port...........................................................21
Amplifiers.............................................................21
Connecting:
Rear Panel Detailed Illustration & Hookup Example........................22
Section 3: OPERATION
General:
LED Behavior........................................................23
Amp Setup, Network Setup...............................24
Presets..................................................................25
BYPASS Switch Usage......................................26
Serial Port Interface...........................................27
Telnet Access......................................................30
Fuse Replacement...............................................31
Section 4: SPECIFICATIONS.......................................................................................................................................32
Section 5: ARCHITECT’S & ENGINEER’S SPECIFICATION..................................................................................36
Section 6: APPENDIX
Ethernet Cable & RS-232 Pinouts ........................................................37
DataPort Pinout and “Phoenix”-type Connector Part Numbers......38
Section 7: QSC INFORMATION
How to Contact QSC Audio Products..................................................39
3
Download from Www.Somanuals.com. All Manuals Search And Download.
Important Safety Information! Please review the following important
safety information before operating the CM16a.
Explanation of Graphical Symbols
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to humans.
The exclamation point within an equilateral triangle is intended to alert the users to the presence of important operating and
maintenance (servicing) instructions in the literature accompanying the product.
SAFEGUARDS
Electricalenergycanperformmanyusefulfunctions. Thisunithasbeenengineeredandmanufacturedtoassureyourpersonal
safety. Improper use can result in potential electrical shock or fire hazards. In order not to defeat the safeguards, observe
the following instructions for its installation, use and servicing.
CAUTION: To reduce the risk of electric shock, do not remove the cover.
No user-serviceable parts inside. Refer servicing to qualified service
personnel.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: To prevent fire or electric shock, do not expose this equip-
ment to rain or moisture.
1- Maximum operating ambient temperature is 50°C
(122°F).
Federal Communications
Commission (FCC)
Information
2- Never restrict airflow through the device fan or vents.
Please insure that the air intake and exhaust vents are unob-
structed.
NOTE: This equipment has been tested
and found to comply with the limits for a
Class A digital device, pursuant to Part 15
of the FCC Rules. These limits are de-
signed to provide reasonable protection
againstharmfulinterferenceinacommer-
cial installation. This equipment gener-
ates,uses,andcanradiateradiofrequency
energy and, if not installed and used in
accordance with the instructions, may
cause harmful interference to radio com-
munications. Operation of this equipment
in a residential area is likely to cause
harmful interference, in which case the
user will be required to correct the inter-
ference at his or her own expense.
3- When installing equipment into rack, distribute the
units evenly. Otherwise, hazardous conditions could be
created by an uneven weight distribution.
4- Connect the unit only to a properly rated supply circuit.
The CM16a is suitable for connection to 100 - 240 VAC, 47 - 440
hertz, with no special considerations other than the appropriate
IEC power cord.
5- Reliable Earthing (Grounding) of rack-mounted equip-
ment should be maintained.
4
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Overview
The DataPort connections are made with ordinary VGA
computer monitor-type cables (HD-15 male-to-male).
These cables are the same type that are used on personal
computer systems to connect the monitor to the computer.
This allows you to use commonly available cabling for
interconnecting amplifiers to the CM16a. Each DataPort
connection supports the control and monitoring functions
for two audio channels. When using the CM16a with
amplifiers that have more than two channels (such as the 4
channelcinemaamplifiers)additionalDataPortconnections
are required.
TheQSCCM16aAmplifierNetworkMonitorprovidespower-
ful amplifier management and zone paging capability in a
QSControl networked audio system using Ethernet network-
ing technology to communicate with the host computer/
system controller.
The host computer uses the QSControl application software
tooperatethenetworkedaudiosystem,includingtheCM16a’s
and their amplifiers. The software operates on the Microsoft
Windows NT® version 4.0 operating system and can be
customized using Microsoft® Visual Basic Professional Edi-
tion.
The CM16a is a control and monitoring device that relies on
software to do its job. The functions and capabilities pro-
vided in the design of the CM16a can only be realized with
proper software implementation. Keep in mind that this
manual’s intent is to outline these capabilities and provide
a reference for properly installing and interconnecting the
CM16atothenetworkedsystem’shostcomputer,the audio
inputs and the amplifiers to be controlled and monitored. A
thorough knowledge of the control software’s features and
operation will provide the best possible results for the end
user.
ThismanualoutlinesthecapabilitiesoftheCM16aaswellas
its installation and connections. The operation of the CM16a
is accomplished using QSC’s QSControl software. Note that
not all hardware features may be supported by the current
software revision. Please refer to the software’s documenta-
tion & help file for information regarding software features,
usage and functions.
EachCM16aperformscontrolandmonitoringfunctionsforup
to 16 amplifier channels. This could be up to eight 2-channel
orfour4-channelamplifiers(orsomecombinationofthese)at
thetimethisdocumentwasprinted.Theamplifierssupported
by the CM16a are the PowerLight, PL2, PL2A, DCA, and CX
seriesofQSCamplifiersthathaveabuilt-inDataPort.Models
that do not have a built-in DataPort or models that have a DP-
1 option or “V2” DataPort (such as the EX, MXa, & ISA
series) are NOT supported by the CM16a.
From all of us at QSC Audio Products, thank you for your
purchase.
Note: PL2A amplfiers have programmable filters and
crossovers. This makes gain “reporting” to the host unreli-
able as the frequency content relates directly to reported
output levels. Since the output level is used to calculate
gain, it is not possible to gaurantee accurate gain reporting
when the PL2A is set for any of its various frequency boost/
cut/crossover modes.
5
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Physical Characteristics & Layout
PHYSICAL CHARACTERISTICS
The CM16a is one rack space high (1RU) and has an internal, univeral 100-240V AC power supply. The chassis is 37.7 cm (14.84”) deep.
The width of the chassis, less rack ears, is 43.7 cm (17.20”). For detailed mounting dimensions, refer to the Section 4: Specifications-
Dimensions (page 32). The weight of the CM16a is approximately 5 kilograms (11 pounds).
FRONT PANEL (numbers correspond to reference locations shown in illustration above)
1-
2-
3-
4-
5-
6-
7-
POWER switch
Cooling air exhaust vents (intake vents are located on left side of chassis as viewed from the front)
POWER on indicator
DIAGNOSTIC indicator
RCV, XMT and LINK STATUS network status indicators
PORT A - PORT H connection indicators
Access hole for the BYPASS switch (this is not labeled on the panel)
6
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Physical Layout Diagram
REAR PANEL (numbers correspond to reference locations shown above)
1-
2-
3-
4-
5-
6-
7-
8-
9-
10-
DataPort connectors PORT A - PORT H
PORT A CH 1 - PORT H CH 16 three-pin receptacles for audio inputs
PAGE three-pin receptacle for paging audio signal input
MONITOR CHAIN, IN and OUT five-pin receptacle for audio monitoring functions
RLY / TRG IN two-pin receptacle for remote sensing of switch closure or logic event
RLY OUT three-pin receptacle for output terminals of CM16a’s internal SPDT relay contacts
RCV, XMT and LINK STATUS network status indicators
10BASE-T RJ-45 Ethernet computer network connection
RS-232 port for network and firmware utilities
IEC-type detachable AC power cord receptacle (for connection to AC line cord) with integral fuse holder
7
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- List of Functions & Features
FUNCTIONAL LISTING, BLOCK DIAGRAM & DETAILED DESCRIPTIONS
The CM16a performs remote control and monitoring of amplifiers. Below is a listing of the functions available for the supported QSC
amplifiers.Thefollowingtwopages(BlockDiagrampart1&2)illustratethemainfunctionsoftheCM16a.Followingthediagramisasection
giving detailed explanations on each functional block that will aid in the use of the CM16a. Note that not all features may be supported
by the current revision level of software (consult software documentation for supported feature set). Where applicable, functions are
available on each individual audio channel.
CONTROL FUNCTIONS
Amplifier: Power (Standby/Operate Control)
CM16a:
Input Sensitivity Select
Signal Level Control
Signal Polarity Select
Input Source Select (Normal/Page)
Signal Mute
Paging Control (with customizable routing)
Contact Closure Output (switching of internal relay for control of external device)
Paralleling within DataPort Pair
MONITOR FUNCTIONS
Amplifier: Power Status
Amplifier Gain
Amplifier Model
Load Monitor (impedance)
Output Voltage
Bridge Mode
Protection Status
Output Current
Output Power (real)
Headroom
Heat Sink Temperature (with Over-Temp.)
Clipping Detect
Output Short
Output Open
CM16a
Input Level Meter
Output Level Meter
Audio Monitor Module (4 channel mono. mixer)
External Event Sensing (a logic-level or switch input)
SPECIAL FEATURES
DAC (digital-to-analog converter) that can be used for generating test signals
RS-232 Port for setting of network address information and system diagnostics
TFTP upgradeable firmware via Ethernet
8
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Block Diagram (part 1)
9
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Block Diagram (part 2)
10
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Detailed Description of Functions
AUDIO FUNCTIONS
AUDIO MONITOR CHAIN FUNCTIONS
AudioInputs- Thesearethe 3-pinterminalblock connectors
used for balanced line level audio-signal input. This type of
connector is sometimes called“Phoenix”or “Euro” style.
Pre-Fader Monitor- Monitors the audio path at the point
before the Level Control block (i.e. the input to the CM16a).
Post-Fader Monitor- Monitors the audio path at the point
after the Level Control, Mute, and Polarity blocks (i.e. the
output from the CM16a).
Input Sensitivity- Sets the sensitivity of the Audio Inputs to
either 1 Volt or 3 Volts (r.m.s.). This selection should coincide
with the level of the audio signal provided for each channel.
Amplifier Monitor- Monitors the audio at the output of the
Input Source: Normal/Page- Selects the input source for
each channel. Normal input is the audio connected at the
Audio Input terminals. Page input is the audio provided by the
Paging Input Module.
amplifier (i.e. the speaker terminals of the amplifier).
Off- This selection disconnects the monitor for the channel.
Level Adjust- Provides adjustment of the signal level deliv-
ered to the Monitor Module from each of the selectable “tap”
points of a channel’s audio path. Adjustment is from -95.5dB
to 0dB in 0.5 dB steps.
Level Control- Provides adjustment of the signal level
deliveredtotheamplifierforeachchannel.Adjustmentisfrom
-95.5dB to 0dB in 0.5 dB steps.
Monitor Module- This module functions as a four-input
mixer with software selection of the input channels. The four
selected channels are summed with the external input,
Monitor Chain In. For each of the inputs, the “tap” point is
selectable from the pre-, post-, amplifier and off positions.
Meter-These points are indicators of where in the audio path
the software can “meter” the audio.
Mute- Actively mutes the audio signal being passed by a
channel.Nosignalisdeliveredtotheamplifierwhenachannel
is muted.
Parallel Mode- When parallel mode is selected, the input to
the first channel is also applied to the second channel. When
in parallel mode, the input is ALWAYS from the first (or odd
numbered) input. The second (or even numbered) input is
ignored; this includes the PAGE signal. This feature is useful
forsendingoneinputsignaltobothamplifierchannelswithout
having to wire jumpers between the two input connectors.
This mode is automatically enabled by the CM16a when the
amplifier bridge mode is set to any of the parallel modes
available (see amplifier manual for details).
AMPLIFIER CONTROL FUNCTIONS
Standby/ Operate- Controls the amplifier’s power status-
ON- amplifier operational
STANDBY- amplifier in standby mode
NOTE! The amplifier must be powered in order to respond to
any commands issued by the CM16a. This means the amp’s
power switch must physically be in the ON position.
Polarity- Determines the polarity of the signal delivered to
the amplifier for each channel.
11
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Detailed Description of Functions
AMPLIFIER MONITORING FUNCTIONS
Protect Status Detect- Reports if the amplifier has
entered “protect” mode (such as thermal, over-current
or power-up muting protect status).
Amplifier Model Detect- Identifies what model of
QSC amplifier is connected to the CM16a’s DataPort.
Real Power Detect- Reports the “real” power the
amplifier is delivering. This “real” power is not the
sameas“reactive”power. Realpoweristheproductof
currentandvoltagetimesthecosineofthephaseangle
between them.
Amplifier Gain Detect- Reports the setting of the
amplifier’s gain setting (in dB) for each channel.
Bridge Mode Detect- Detects the position of the
bridge mode switch on each amplifier.
Clip Detect- Detects amplifier clipping on each chan-
Threshold Adjust- This indicates that the behavior of
the associated block requires the input of a threshold
valueinsoftwarethatmustbecrossedforthedetection
to occur. This allows the system operator to tailor the
behavior of the system to each application.
nel.
Headroom Metering- Reports the “available” re-
maining signal level that the input signal can be driven
before clipping will occur.
Heat Sink Temperature Metering- Monitors the
heatsinktemperatureofeachchannelofeachamplifier
connected to the CM16a. If the temperature exceeds a
userspecifiedvalue(insoftware)thentheOver-Temp.
“object” will alert the system operator.
PAGING FUNCTIONS
Input Sensitivity- Sets the sensitivity of the Page
Input to either 1 Vrms or 3 Vrms. This selection should
coincide with the level of the audio signal provided for
the Page Input.
Load Monitor Detect- Monitors the impedance of
the load at the amplifier output for each channel.
DAC- This is a digital-to-analog converter that takes
digital information from the internal microcontroller
and outputs the corresponding analog “equivalent” to
the appropriate channel PAGE insert points . This oc-
curs only by instructions issued by the system operator
or a custom control application.
Output Current Meter- Provides for metering of the
amplifier’s output current on each channel.
Output Voltage Meter- Provides for metering of the
amplifier’s output voltage on each channel.
Output Open Detect- Detects when the load con-
nected to the amplifier is above a user specified value
in software.
Page Input- This is a 3-pin terminal block connector
used for balanced line level page audio-signal input.
Output Short Detect- Detects when the amplifier
load is below a user specified value in software.
Power Status Detect- Reports AC power status of
the amplifier (ON/standby/ OFF).
12
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Detailed Description of Functions
RS-232 PORT FUNCTIONS
CONTACT CLOSURE I/O FUNCTIONS
RS-232 Port- The RS-232 (serial) port is used to
communicate with the CM16a for Ethernet address
setup and other diagnostic purposes. Most users will
never have a need to access the RS232 port, but for
customized networks and for troubleshooting system
problems, it may be necessary.
RLYOUT-Thisisa3-pinterminalblock connectorused
forremotelycontrollinganelectricaldeviceinanon/off
manner(suchasacoolingfan,anaudiblealarm,alight,
etc.).AninternalSPDT(single-pole,doublethrow)relay
is controlled by software command. Its contacts are
accessible at the rear panel RLY OUT connector and
are labeled:
NC (normally closed)
NO (normally open)
C (common)
For the RS-232 port utilities, see the Operation
section, “Serial Port I/O Interface” which out-
lines the proper connection and communication
settingsrequiredtocommunicatewiththeCM16a
via the serial (RS232) port.
RLY/TRG IN- Detects the closure (or opening) of a
switch connected to the RLY/TRIG IN terminals on the
rear panel. Also accepts CMOS and TTL logic-level
inputs. An example is the detection of a limit-switch
that indicates an open door on an equipment cabinet.
If the CM16a is connected to an Ethernet network
where the factory-provided IP address information is
not acceptable, the IP configuration may be changed
using the RS-232 port. This involves connecting a com-
puter with a properly configured serial port to the
CM16a using a null-modem type cable (such as a
“Laplink” cable) and running a dumb-terminal program
(HyperTerminal is the Microsoft® Windows- supplied
program). DO NOT CHANGE THE FACTORY SETTINGS
UNLESS YOU ARE CERTAIN OF WHAT YOU ARE DO-
ING!Ifaddressingisconfiguredincorrectly,theCM16a
may not respond to network control.
This input may also be configured to activate (recall)
certain presets without the need for a computer. Setup
for this feature is possible using the Serial Port I/O or
Telnet sessions outlined on pages 27 - 30 (ref. menu
item #10).
Note- The factory-programmed IP address is printed
on a label affixed to the front panel of the CM16a.
Record this IP address in a safe place in case the label
becomes lost.
13
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Network Description
QSC CM16a Amplifier Network Monitors are designed to operate on standard 10BASE-T Ethernet. Each CM16a operates as a
respectivenodeonitsnetwork;eachunitcontainsaprogrammableIPaddressinnonvolatilememory. Tominimizenetworkconflicts,
each IP address should be unique. When shipped from the factory, the CM16a’s factory-programmed IP address is printed on a label
affixed to the front panel of the unit. Record the unit’s IP address and serial number and keep in a safe place. Ethernet devices such
as hubs, repeaters, switches and routers will usually afford the flexibility to configure the network as needed.
The system controller computer on the network must have an Ethernet-compatible network interface card (NIC) installed.
Additionally, if operation during power outage or interruption is required, an uninterruptable power supply (UPS) will be required for
the host computer , CM16a, and any hubs, switches or repeaters. If the CM16a is disconnected from the network for any reason, it
will continue to process audio using the last settings, assuming AC power is uninterrupted.
The CM16a connects to the network via its RJ-45 connector on the rear panel. This allows direct connection to a 10BASE-T network.
Use Category 3 (or better) unshielded twisted pair (UTP) Ethernet Cable. Most ready-made Ethernet patch cables available today are
rated at least Category 5 making them suitable for this application.
OnesidenoteregardingEthernetcabling:AlthoughCategory3datacableiscalledoutastheminimumrequirement, itisincreasingly
difficult to find. Higher grades of cable are becoming the “normal stock” with the proliferation of 100BASE-T Ethernet. Category 5
Ethernet cable is the most widely available type of data cabling as of this writing. So what does this mean? Use Category 3 if it is
availableandcosteffective.IfthecostofCategory5cableisnotprohibitive,itmaybedesirabletodoyourcablingruns withCategory
5 due to its increased data rate capabilities. The extra capability may be needed for future system expansion where 100 BASE-T
devices are used. 10BASE-T capability is all that is required for the CM16a and thus the call out for Category 3 as the minimum.
14
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Sample Network Topologies
The simplest network configuration is a single
system controller computer and a CM16a con-
nected by a single Ethernet crossover cable. A
standard Ethernet cable would NOT work. The
crossover-type cable must be used when con-
necting the CM16a directly to the system con-
troller computer. This type of cable switches
(or crosses over) the transmit and receive sig-
nals from one end to the other enabling con-
nectionwithoutanyintermediatedevices.See
page 37 for crossover cable pinouts.
For CAT-3 or CAT-5 distances longer than 100
meters(~300feet)arepeatermustbeused. An
active hub or Ethernet switch may be used as
well.Activehubs“cleanup”andretransmitthe
network traffic, much as a repeater does, only
with multiple ports. The active hub or switch
would allow for future expansion.
If there are two or more CM16a’s in
the network (or other network de-
vices present) use a hub or switch
to create a star topology.
15
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 1: Introduction- Sample Network Topologies
Some networks have multiple system con-
troller computers. This configuration is es-
sentially the same as the second example
with the addition of the second computer
attached to the hub or switch.
To create the more complex distributed star
topologies needed for larger systems, use
additionalhubsorswitches.Somehavespe-
cialuplinkportsforconnectingtootherhubs
or switches via a standard Ethernet cable. If
the hubs or switches do not have uplink
ports, then the hub-to-hub or switch-to-
switch connection should use a crossover-
type Ethernet cable.
16
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Basics and Mounting
UNPACKING
There are no special unpacking precautions for the CM16a. Keep the original packing material for reuse in the rare event that service be
required on the CM16a. If service is required and the original packing material is not available, adequately protect for shipment (strong box
of appropriate size, sufficient packing material to prevent impact damage or load shifting).
WHAT IS INCLUDED IN THE CARTON
1- CM16a Amplifier Network Monitor
2- AC Power Cord
3- One complete set of the “Phoenix”-type connectors (18 pcs. of 3-pin style, 1 pc. of 5-pin style & 1 pc. of 2-pin style)
4- Hardware manual (this document)
LOCATION CONSIDERATIONS
Where the CM16a is installed is dependent upon the location of audio input sources, amplifiers and network access. The system controller
computer should be located someplace convenient for the system operator. In most instances, the system controller computer is remote
from the CM16a and the amplifiers . It is preferable to install the CM16a and the amplifiers in the same or adjacent equipment racks; this
allows the cabling between them to be standard 15 pin VGA monitor cables. These cables are generally 2 meters long (6.5 feet). For longer
cabling runs, contact QSC’s Technical Services Department at (800) 772-2834 (toll free U.S.A. only) or (714) 957-7150. QSC offers a special
cable with individually-shielded twisted-pairs for each audio path; this cable can be used over distances as long as 100 meters (328 feet).
The maximum length of any 10BASE-T Ethernet network segment (cabling between any node and the next node, hub or repeater) is 100
meters(328feet).Thelocationofhubsandrepeatersmustbesuchthatthisdistancelimitisnotexceeded.Ifthisisimpracticalorimpossible,
then use appropriate network transceivers and fiber optic cabling. For larger Ethernet networks, the use of Ethernet routers may be
necessary.
MOUNTING THE CM16a
Note- Rack mounting is optional.
The CM16a is secured to the front of the equipment rack with four screws and washers. Be sure to support the weight of the CM16a when
securing to avoid distorting or bending the front panel mounting ears. For mobile, touring or portable applications, support the rear of the
CM16a using the rear mounting tabs provided or contact QSC’s Technical Services Department to order rear rack ear extensions. The rear
rackearextensionkitsaddflexibilitytoyouinstallationoptionsaswellasasupport-pinoptionthatrequiresone-timehardwareinstallation
at the rear of the rack. For the locating dimensions of the rear support mounting tabs, see the dimensional diagram in the specification
section.
17
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Mounting and AC Power
MOUNTING THE CM16a (continued): The illustration below, left, shows the basic mounting technique. Support the CM16a from
underneath while positioning the mounting holes in the desired location in the rack. Secure with standard rack hardware. The CM16a uses
fan-drawnairforcooling.Theairintakeisontheleftsideofthechassisandtheexhaustventsareonthefrontpanel.Becertainnottoobstruct
these openings! Allow ample “open space” around them in order to maintain unobstructed air flow.
Note! The CM16a’s recommended ambient operating temperature is 0°C. to 50°C. (32°F. to 122°F.). Do not
install the CM16a in environments that expose it to temperatures outside this range. Some equipment
rack environments can get hot. If there is any question, measure the air temperature inside the equipment rack
andsupplyadditionalcooling(airflow) tokeeptheambienttemperaturewithinthespecifiedlimits.QSCamplifiers
use back-to-front air flow and therefore do not exhaust hot air into the rack.
CONNECTING AC POWER
The CM16a uses a detachable IEC standard power cord for connecting to a grounded AC
REAR PANEL- POWER CORD RECEPTACLE
source. To connect power to the CM16a: identify the proper end of the cord, match the
orientation of the receptacle on the rear panel and insert firmly into the receptacle. The
power supply will accept from 100 to 240 Volts AC, 47 to 440 Hertz, without any changes.
The power cord used must be suitable for the line voltage the CM16a is connected to. If a
different type of IEC power cord is required (different style of plug on the outlet end) contact
QSC’s Technical Services Department to obtain the correct cord assembly.
DO NOT CONNECT THE CM16a TO POWER SOURCES OUTSIDE THE SPECIFIED
RANGES OF VOLTAGE OR FREQUENCY! DAMAGE TO THE UNIT COULD RESULT OR
THE USER COULD BE EXPOSED TO UNSAFE OPERATING CONDITIONS.
18
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Connections
CONNECTING AUDIO INPUTS
REAR PANEL- AUDIO INPUTS
The audio inputs are located on the rear
panel. The CM16a uses terminal block
connectors for the audio inputs. They are
sometimes called “Phoenix” or
“Euro”connectors. These connectors al-
low the installer to pre-wire the input ter-
minationsbeforetheCM16aisinstalledin
the rack. It also allows for re-routing of
audio inputs by simply interchanging connector locations without the need for any
tools. See Appendix (page 38) for connector manufacturer’s part number reference.
BALANCED INPUT CONNECTION
Balanced connection is recommended for all inputs.
The illustrations to the right show the proper connection of audio program input
sources for both balanced and unbalanced inputs.Use balanced connections when-
ever possible. If unbalanced audio sources are used, it is preferable to use an
appropriate audio transformer (or other unbalanced-to-balanced “converter”) to
provideabalancedinputtotheCM16a. Ifthisisnotpossible, thenitisrecommended
thenegative terminalandshieldterminalbeconnectedtooneanotherwithajumper
wire.
UNBALANCED INPUT CONNECTION
Terminal Block Connector Hints-
Strip length : 6 to 8 mm ( 1/4 to 5/16 inch) .
Be careful not to nick or cut the conductor strands .
Aftereachconductorhasbeenstripped, insertit fully intotheconnector
and tighten the retaining screw. When stranded wire is used, carefully
twist the conductor strands together so when they are inserted into the
connector assembly, no loose strands short adjacent terminals.
STRAIN RELIEF
Forheavy-dutyinputcables,theuseofconnectorswithintegralstrainrelief
is recommended. These connectors have a large plastic tab molded as part
of the assembly which provides an area to tape or tie-wrap the cable to. At
the time of this writing, only the 3-pin with the strain relief was available
through QSC . See Section 6 (Appendix) for connector part numbers.
19
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Connections
CONNECTING PAGE INPUT
The PAGE input connections are the same as the AUDIO INPUT
REARPANEL-PAGE,RELAY&MONITORCONNECTIONS
connections. Please refer to the previous page for connector
pinout.
CONNECTING THE RLY/TRG IN
TheRLY/TRGINconnectorisatwo-pinterminalblockconnec-
tor. When using this input for a switch-closure (or opening)
event, the two terminals should be connected to the switch
contactsdirectly.Thistypeofeventdetectioncanbeusedwith
relay contacts as well.
If used with a logic-type device, the low-end of the logic
connection should be connected to the minus (–) terminal and
the active-end should be connected to the plus (+) terminal.
This input is compatible with TTL & CMOS logic family de-
vices. For the defined limits of input to this connector , please
refer to the specification section.
TIP- This input can be used to switch between
stand-alone preset operating modes without the
need of a computer. Setup for this feature is avail-
able through RS-232 or Telnet communications.
CONNECTING THE RLY OUT
CONNECTING THE MONITOR CHAIN IN/OUT
The RLY OUT connector provides access to the internal relay’s
contacts for remotely controlling an external low voltage device
or circuit. This internal relay is rated for 70V (DC or ACrms), 250
mA(switched)andisisolatedfromground. Thereisonecommon
terminal, one normally-closed contact terminal and one nor-
mally-open contact terminal. These are labeled as C, NC and NO
ontherearpanel. Whentherelayisnotenergized, theCterminal
is connected to the NC terminal and the NO terminal is not
connected; when the relay is energized the C to NC connection
is opened and the C to NO connection is closed.
The MONITOR CHAIN connector is a 5-pin terminal block con-
nector. The center pin is the shield connection for both the input
and output of the monitor chain. Note also that the positive
terminal of the input and output connections are on the outer
pins of this connector.
ATTENTION! DO NOT CONNECT VOLTAGES EXCEEDING 70 VOLTS (DC or AC rms) TO THE RLY OUT CONNECTOR!
DAMAGE TO THE CM16a COULD RESULT OR CREATE HAZARDOUS OPERATING CONDITIONS! If there is a need to switch
higher voltage or current levels with the CM16a, contact Technical Services for suggested solutions.
20
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Connections
CONNECTION TO 10BASE-T (network connection)
ConnectiontotheEthernetnetworkismadeusingtheRJ-45type
connector labeled 10BASE-T on the rear panel.“RJ-45” is the
standardnetworkconnectorforEthernetnetworks.InserttheRJ-
45plugintothereceptaclewiththelock-taborientedtowardthe
bottom of the CM16a and push firmly until the connector locks
into place (usually an audible “click” can be heard). Refer to
Section 1 of this manual for Ethernet connection schemes and
cabling.IftheCM16aisconnecteddirectlytothesystemcontrol-
ler computer’s network interface card, a crossover type cable is
required. All other connection methods utilize normal Ethernet
cabling.
CONNECTING TO THE RS-232 PORT
Connection is made with a null-modem serial cable with a DB-9
maleplugtotheCM16a. TheRS-232 portcanbeusedforsetting
various operational parameters that are CRITICAL to proper
operation of the CM16a. The network address settings can be
changed through this port. Do Not Change the Network
Address unless you are certain of what you are doing!
Refer to Section 3 (page 27) for more information.
CONNECTING TO 4-CHANNEL AMPLIFIERS
CONNECTING TO 2-CHANNEL AMPLIFIERS
Two basic rules must be adhered to:
2-channel amplifiers require a cable connection from the amp’s
DataPort to the appropriate PORT receptacle on the CM16a.
These HD-15 type connectors are labeled PORT A through PORT
H. Use standard 15 pin VGA monitor cables (the same type of
cable that interconnects PC’s & monitors).
First, both DataPorts of the amplifier must be used.
Second, both must be connected to the same CM16a.
If only one DataPort connection is used, the CM16a will not
control or monitor the amplifier correctly (the same applies for
connectingthetwoamplifierDataPortstotwoseparateCM16a’s;
the system will not function properly). Insure that both amplifier
DataPorts are used and that they are connected to the same
CM16a. YoudonothavetouseadjacentportsontheCM16a(i.e.
PORT C and PORTD). You can use any two ports for convenience;
the only impact of doing this is that the System Manager
software control panel will not show all four channels next to
each other.
To connect the cable to the CM16a, orient the HD-15 connector
with its wider-side down (look at the connector, one side of the
plug’smetalsurroundingiswiderthantheother)andalignitwith
the receptacle, then gently push into the receptacle until it is
firmly seated. Use the retaining screws on the cable ends to
secure the plug to the CM16a and the amplifer. Tighten “finger
tight” to avoid damage to the HD-15 receptacle. The same basic
procedureappliesforconnectingtheotherendofthecabletothe
amplifier’s DataPort.
21
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 2: Installation- Rear Panel Detail
22
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- LED Indicators
LED Indicators- When the power is switched “on”, all of the LED’s light briefly and then the PORT LED’s sequence through two patterns.
The LED’s then resume normal operation. The LED functions are described below.
POWER LED-
This indicator illuminates when the CM16a power switch is in the “on” position.
This indicator illuminates during the power-on self test, then should turn off. If it
remains illuminated, this indicates that the self-test has detected an unexpected event,
such as a corrupted firmware update via TFTP or a memory boot failure. If the
DIAGNOSTICLEDremainsilluminated,tryresettingtheCM16abycyclingpoweroffand
on once. Should the indication persist, contact QSC’s Technical Services for guidance.
DIAGNOSTIC LED-
There are three LED’s on the front and rear panels labeled RCV, XMT and LINKSTATUS.
Their functions are described below.
NETWORK STATUS LED’s-
RCV- This LED lights up any time the CM16a receives data over the network.
XMT- This LED lights up whenever the CM16a transmits data over the network.
LINK STATUS- When lit, this LED indicates that the CM16a is connected to an
operating Ethernet network.
If not lit, there is most likely a cabling problem between the CM16a and the hub or
possibly a fault in the hub.
TheseLED’sarelabeledPORTAthroughPORTHonthefrontpanel.TherespectiveLED
will illuminate when functional connection has been made between the CM16a and an
amplifier. The amplifier’s power does not have to be ON in order for the LED to indicate
successful connection.
PORT CONNECTED LED’s-
23
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- General Information & Presets
AMPLIFIER SETUP-The amplifiers connected to the CM16a
must have their power switches in the “on” position. For initial
testing, it is advisable that the amplifiers be set for the lowest
useful gain (volume) setting until it is verified that the system is
operating as expected. After the system setup has been verified
and tested, gain settings may be set as required.
Thepresetsareusefultools,butPreset0actsdifferentlythanthe
others.EachtimetheCM16aispoweredup,itrecallsitssettings
from Preset 0. The factory Preset 0, discussed above, is a muted
state with amps in STANDBY mode. When setting up your own
presets, they should be stored in Preset 1 through Preset 15. See
next page for notes regarding Preset 14’s use as a “scratchpad”.
NETWORK- The network should be operable and QSControl
software should be installed/running on the system controller
computer.
The reason for not actively using Preset 0 is as follows:
Let’s say you’re operating your system in Preset 12 and you
change the setting of one fader. The new setup is NOT the same
as Preset 12, so the CM16a starts a 4 minute timer from the
time the control was changed. After the 4 minutes has
elapsed with no further control changes, it saves the
NEW scene into Preset 0 . Preset 12 is left unchanged.
WhateverwasinPreset0isnowgoneforever. Thisinsuresthat
thenexttimetheCM16aispoweredup,it’ssettingsarethesame
as you left them. Remember, the CM16a always powers up
in Preset 0. Refer to the software documentation for further
information.
CM16a OPERATION- To turn the CM16a on, press on
the upper portion of the power switch. The green
colored POWER LED will illuminate when the power
switch is in the “on” position. If not, verify that the IEC
power cord in properly connected to the unit and to an
operating AC source between 100 and 240 volts.
Operation of the CM16a is accomplished with QSControl soft-
ware.
START-UP BEHAVIOR AND PRESET OPERATING
MODES- It is important to understand the start-up behavior
outlined below. Some of the terminolgy is specific to QSControl
software; refer to the software’s helpfile for detailed informa-
tion.
Preset 0 will only be overwritten 4 minutes after the last
control change. This includes if the CM16a is placed into
one of its BYPASS modes as discussed in the following
section. If the CM16a is placed into BYPASS mode and operated
for at least 4 minutes without control changes, then the BYPASS
mode is saved in Preset 0. The next time the CM16a is powered
up,itwillstartupinPreset0(orBYPASSinthiscase).Thiscould
cause dangerously high output levels from the system.
Insure amplifier gain controls are reduced to safe levels
ANY time BYPASS mode is used.
When first taken out the box, the CM16a will power up in
amutedstate withallfadersat-95.5dB.,polaritysettonormal,
sensitivity set to 3V, and any amplifiers connected to the CM16a
will be in STANDBY mode. This “setup” is the factory setting.
PRESETS- The CM16a has 16 Presets for quickly recalling
settings. They are numbered 0 (zero) through 15. These presets
areusefulforquicklychangingfromonesetuptoanotherwithout
having to change each individual control to a new setting. An
example might be in a house of worship where the audio system
setup is different for each service. Instead of having to keep a
trained system operator on location, another individual with
minimal training can be shown how to change to the desired
preset for each situation.
The CM16a has all outputs momentarily muted at power-up to
preventunexpectedaudiopops,clicksorthumps.Remember: At
power up, the CM16a will always start operating with the
settings saved in Preset 0. Once network communication has
been established between the host computer and the CM16a,
the CM16a may be controlled remotely . In the event that the
network communications link is lost while the CM16a is
operating, itwillcontinuetooperatewithitslastsettings
intact.
24
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Recalling Presets Using RLY/TRG IN
There are three operating modes for recalling presets using the RLY/TRG IN of the CM16a and a
set of external contacts (switch, relay or other such device). These modes are set up and accessed using
the QSControl software or RS232/Telnet sessions. The purpose of this portion of the manual is to outline the current
implementation of this feature. Be aware that the software and firmware of the CM16a are subject to continuous
improvementandthereforethistextcannotbeguaranteedaccurate. RefertotheQscontrolsoftwarehelpfileforthe
most up-to-date information.
MODE #1- Recall Preset 15 when contacts connected to RLY/TRG IN contacts are opened. Restore previous settings when contacts
connectedtoRLY/TRGINareclosed.Preset14isusedasa“scratchpad”andisOVERWRITTEN.WhateverwasinPreset14isGONEforever.
Onceinthismode, thefirsttimethereisatransitionfromcontactsclosedtocontactsopened, thecurrentlyrunning
settings will be saved , and the settings in preset 15 will be recalled. When the contacts attached to the RLY/TRG
IN are again closed, the settings will revert to their previous values/positions. This could be used for a paging
application where the program inputs are temporarily muted and the page input routed to the outputs; after the
page, the sytem reverts back to it’s previous opearting setup.
MODE#2-RecalPreset15whenthecontactsconnectedtotheRLY/TRGINareclosed.Restoreprevioussettingswhencontactsconnected
to RLY/TRG IN are opened. Preset 14 is used as a “scratchpad” and is OVERWRITTEN. Whatever was in Preset 14 is GONE forever.
This mode is identical to MODE #1 (above) with the exception that the closed and open contact operation is
swapped.Onceinthismode,thefirsttimethereisatransitionfromcontactsopenedtocontactsclosed,thecurrently
running settings will be saved , and the settings in Preset 15 will be recalled. When the contacts attached to the
RLY/TRG IN are again opened, the settings will revert to their previous values/positions.
MODE #3- Recall Preset 14 when the contacts connected to the RLY/TRG IN are closed. Restore Preset 15 when the contacts connected
to RLY/TRG IN are opened. In this mode, Preset 14 WILL NOT be overwritten.
Onceinthismode,thefirsttimethereisatransitionfromcontactsopentocontactsclosed,Preset14willberecalled
OR the first time there is a transition from contacts closed to contacts open, Preset 15 will be recalled. After the
firsttransition,theCM16awilltogglebetweenPreset14andPreset15withthecorrespondingcontactclosed/open
position.
Note that the presets will only be recalled starting with the first transition of the contacts (opened OR closed). For example, if we are
currently running Preset 2 with the contacts connected to RLY/TRG IN closed, and then change to MODE #3, nothing will happen except
continuing operation in Preset 2. Now, if the contacts are opened, Preset 15 will be recalled. Finally, if the contacts are closed now, Preset
14 will now be recalled. At this point, you can not recall Preset 2 without using the control software. Only Preset 14 & 15 will be available
using the contact I/0.
25
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Bypass Modes and Switch Location
NOTE! Before depressing the BYPASS switch, the gain settings on all amplifiers connected to the
CM16a must be reduced to a safe level. This is because the CM16a’s “Level Control” will be reset
to 0 dB with the BYPASS. Amplifiers could be at maximum output level if the amplifier gain controls
are not turned down.
BYPASSMODE#1(“virtual-wire”mode):UsethismodeifyouneedtheCM16atobehaveasavirtualwire. ThisBYPASS
mode routes all audio straight through with 1Vrms input sensitivity, PAGE input disabled, MUTE disabled, 0 dB level, and normal
polarity. All amplifier control states are set to “on”. Audio passes through the CM16a regardless of network/computer issues.
HOW TO put the CM16a into BYPASS MODE #1:
1- Turn the CM16a on and wait 5 to 10 seconds for the start-up LED sequence to finish.
2- Depress the BYPASS switch (use a paperclip or similar item) and keep it depressed for at least 5 seconds.
3- The two steps above must be completed within 60 seconds from power-up. If you miss the timing, just power-down and
power-up again and repeat steps 1 & 2.
BYPASSMODE#2(SAFEMODE):UseiftheCM16abecomesinoperable(orbehavesincompletelyunexpectedways)
after uploading a new application file (TFTP file transfer).
If the CM16a operates in an unexpected way or is not responding to any communications after a new application file is uploaded
to it, it is likely the file was corrupted during transfer. If this occurs, there is a “backup” program in the CM16a that will enable you
to communicate with it.
HOW TO put the CM16a into BYPASS MODE #2:
1- Turn off the power to the CM16a using the front panel power switch.
2- Depress the BYPASS switch (use a paperclip or similar item) and keep it depressed while turning the power on again.
3- The CM16a is now in “safe mode”. You may release the BYPASS switch.
You will now be able to re-establish Ethernet communications with the CM16a. Once communication has been re-
established, the file transfer can be tried again or the old application file used until the source of the data transfer problem
can be found. In safe mode, all connected amplifiers are forced to the standby state, and all audio paths are muted. Also,
no QSControl communication is possible, only TFTP or Telnet, or RS-232.
Location of BYPASS switch: The front panel has a small
access hole on the right side about 12mm (1/2”) to the right from
the PORT H LED. It is NOT LABELED to help prevent accidental
use. This is the BYPASS mode switch. To return to normal
operation, simply reestablish computer communications via the
networkorRS-232andchangetheappropriatesettings(orrecall
a previously saved Preset). After completeion of a successful
TFTP file transfer/code re-program cyclefrom the safe mode, the
CM16a will automatically restart in the normal mode of opera-
tion.
26
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Serial Port I/O Interface
The RS-232 connector on the rear panel is used as a serial port
input/output (I/O). This I/O port is used for accessing Ethernet/IP
settings, stand alone control capabilities, system “health” data,
firmware version information and other related data.
Thisinterfaceisnotusedbythemajorityofusers. Butshouldany
system problems arise, the data that may be accessed through
this interface can help to track down the problem. The most
common items that might be used are “Display Network Set-
RS-232 Communications Procedure:
tings” and “Enter Network Setup”. Many of the remaining
selections would typically be used for troubleshooting purposes
along with a QSC technical representative prompting you to
access particular menu items so the data can be interpreted.
1) Connect the RS-232 port of the CM16a to an unused serial
port (COM port) of a PC using a null modem type cable. These
cables are different than the ordinary serial cable.
Connection is made using a null-modem type serial cable be-
tween your computer’s serial port and the RS-232 port of the
CM16a. Once properly connected, a “dumb-terminal” program
(such as Hyper Terminal, a widely used version on most Win-
dows-based PC’s) is started and communication established
between the PC and the CM16a.
2) Open the HyperTerminal program. This program is usually
started by clicking the Windows START icon, highlighting PRO-
GRAMS, then ACCESSORIES and finally, highlighting the Hyper
Terminal folder and clicking on its icon.
Following is the basic procedure for starting up Hyper Terminal,
naming the connection, specifying the communications settings
and an example of “what you should see” for a text-menu once
the communications link has been established. As many differ-
ent systems and configurations exist on user’s PC’s, the exact
appearance of the screen shots may vary from those shown.
Furthermore, if programs other than Hyper Terminal are used,
youwillneedtofollowyoursoftware’sinstructionsforestablish-
ing communications through your PC’s COM (serial) port.
The screen-shot below shows a typical icon-view of the Hyper
Terminal folder (icons shown for each program in the folder). If
your system was setup for a list-view, then you will instead see
alistofwhat’sinthefolder. IdentifytheHyperTerminalprogram
icon (or name from the list) and click (or double-click as required)
to start the program. In the screen-shot below, the Hyper Termi-
nal icon is the fifth from the left in the row of icons.
HyperTerminal Icon
27
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Serial Port I/O Interface
3) After starting Hyper Terminal, a Connection Description window will
pop-up. It will require that you name your connection.Enter a name for your
new connection (example: CM16a) and click OK to continue.
4) Next, Hyper Terminal needs to know how to “talk” to the CM16a. This
selection depends on which port on your PC the null-modem cable is
connected.
Ignorethefirstthreeentryfields(phonenumberinformation)and godirectly
to the “Connect using:” entry field and click on the down arrow for the drop-
down menu selection.
Select the appropriate port (COM1 is used in this example) and click OK to
continue. The Properties window should appear next.
5)ThePropertieswindowfortheselectedCOMportshouldnowbeactive.
It should be similar in appearance as the example to the right.
For the Port Settings, use the following information so communica-
tion between the CM16a and the computer is in the same “language”.
Bits per Second
Data Bits
9600
8
Parity
none
1
Stop Bits
Flow Control
Xon/Xoff
Once you have set the properties as outlined, click OK to continue.
If all the connections and communications settings are correct, the main
Hyper Terminal window will appear next (see next page).
28
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Serial Port I/O Interface
6) The Hyper Terminal main window will appear next, but blank. Type the letter “h” (for help) and then the “Enter” key. This will prompt
the CM16a to post its menu text. The “h” key is the Help prompt for the CM16a.
7) The next screen will look similar to the Hyper Terminal window above. After typing “h” and “Enter”, a text menu will appear. The menu
should appear very similar to the example above. This is sent by the CM16a and will detail your options and instructions for changing the
address information. Any differences in menu text from the above example might occur after any firmware updates of the CM16a.
Fromthis“main-menu”youwillneedtomakeyourmenuchoicesandfollowtheinstructionsinthefollowingsub-menusorscreens.Although
many of the instructions and tests may not pertain to a specific setup or troubleshooting situation, you may be asked to run certain tests
by a QSC technical representative. The results of these tests will help to troubleshoot any problems.
The most common user item that might require settings to be changed would be the IP address information. This would be useful if the IP
addresswasinadvertantlychangedtoanunrecognizedaddressandsubsequentlyyouwereunableto“talk”totheCM16aoverthenetwork.
This situation would require the “Display Network Settings” and “Enter Network Setup” items to be accessed for re-assigning a “good”
IP address.
IP ADDRESS ASSIGNMENT-
ONLY REQUIRED FOR ATTACHING TO EXISTING NETWORKS!
DO NOT CHANGE THE COMMUNICATIONS SETTINGS OF THE CM16a UNLESS CERTAIN OF YOUR ACTIONS. THE
FACTORY-PROGRAMMED IP ADDRESS IS PRINTED ON A LABEL AFFIXED TO THE FRONT PANEL OF THE CM16A
WHEN IT IS SHIPPED. RECORD THIS IP ADDRESS SHOULD YOU NEED TO RETURN TO THE INITIAL SETTINGS.
29
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Telnet Access
The RS-232 features can be accessed via the network.
The Microsoft Telnet application is a Windows program. Consult Windows documentation for Telnet information .
This is the basic procedure for opening a Telnet session:
1- To open the Telnet sesion- Click START, select RUN, type Telnet followed by a space, then the IP address of the CM16a you want to
communicate with in the text box and click OK. Win2000 will not use a console window (with menu) but rather a DOS window.
2- If the address entered was correct and network communications with the CM16a are successful, the Telnet session should open.
3- Now you have the same options that are available in the Serial Port I/O (RS-232) interface section (see page 29).
30
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 3: Operation- Fuse Replacement
FUSE REPLACEMENT
If the CM16a does not power-up when the POWER switch is in the “on” position (POWER indicator LED does not illuminate) check the
source of AC power and the connection of the power cord at the outlet and IEC receptacle ends. If the AC source is “on” and the power cord
is connected and in good condition, then the condition of the fuses should be checked.
The fuse holder is an integral part of the IEC connector. It contains two fuses.
•
•
To replace a fuse, first detach the AC power cord from the CM16a.
Then use a flat-blade screwdriver to pry the fuseholder out, as shown at left.
The fuses are held in the round openings in the end of the fuseholder as shown at
left, below. Replaceoneorbothfuseswiththesametype:20×5mm, 2amp, 250V.
A visual inspection of the fuse will usually indicate if the fuse has been “blown”
or not. This method is not foolproof, however, as sometimes the fuse element is
severedclosetotheend-capmakingitimpossibletoseethebreak.Whenindoubt,
test the fuse with an ohmmeter or just replace the fuse. Below is an illustration of a typical clear
glass-cartridge fuse. The “GOOD” fuse has an intact element from end to end and the “BAD” (or
blown) fuse has a break in the element.
If the CM16a continues to “blow” fuses, DO NOT INCREASE THE FUSE RATING as severe
damage to the CM16a could result. Contact QSC for service if fuses repeatedly blow.
IffusereplacementdoesnotenabletheCM16atopowerup, double-checktheACpowersource
and the cord assembly before returning the unit for possible repair.
31
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 4: Specifications- Dimensions
SIDE
FRONT
TOP
32
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 4: Specifications
Input Signal Processing
Common-mode rejection
Typical, >50 dB, 20 Hz–20 kHz
Worst Case, >40 dB at 20 kHz
Frequency response
Distortion
20 Hz–20 kHz 0.5 dB
10 Hz–80 kHz 3 dB
<0.01% THD+N @ +4 dBu out
(page input <0.03%)
Crosstalk (inter-
channel within
Data Port pair)
>75 dB separation, 20 Hz–20 kHz
Dynamic range
>110 dB unweighted
20 Hz–20 kHz
Crosstalk (intra-
channel, between
Data Port pairs)
>85 dB separation,
20 Hz–20 kHz
measured with all inputs and
outputs terminated
(page input >100 dB)
Polarity
In-phase or inverted
Level control range
-95.5 to 0 dB in 0.5 dB steps
Precision attenuator
transients (“zipper”
noise)
better than 112 dB below
maximum output
Outputs
Program outputs
Connector type
Pinout
16 (via HD-15)
8 HD-15 data port connections
Special, see appendix
VGA monitor cable
2 meters
Mute
>90 dB attenuation
Cable type
Qualified length
Inputs
Program inputs
Paging inputs
Monitor bus input
Connector type
16
1
1
Monitor output
Connector
1
“Phoenix-style” (a.k.a.
“Euro-style”) detachable
terminal blocks
Terminal block connectors (also
called “Euro” or “Phoenix”-
style”), detachable
Type
Grounding
Electronically balanced
All shield terminals connected to
chassis
Type
Grounding
Electronically balanced
Shield terminal connected to
chassis
Nominal level
Maximum level
Impedance
1V/3V rms selectable
+21 dBu
10 kOhm balanced
Nominal level
Maximum level
Output impedance
Output load
+4 dBu
+21 dBu
75 Ohms balanced
600 Ohms minimum
Power amplifier output processing
Power amplifier output monitoring
Output short detect*
Senses load <1 Ohm for Stereo/
Parallel modes; <2 Ohms in Bridged Mono mode
Threshold is adjustable in software
Senses load >60 Ohms
Threshold is adjustable in software
Range automatically matches to
amplifier model used
Range automatically matches to
amplifier model used
determines amplifier gain control setting, range atomatically matches to amplifier model
Output open detect*
Output voltage meter
Output current meter
Amp gain*
*Signal level must be greater than -32 dB, referenced to maximum output of amplifier
33
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 4: Specifications
Power amplifier management
Power amplifier interface
Protect indicator
Temperature meter
Senses amplifier protect status
Reports amplifier operating
temperature
Compatibility
QSC Data Port equipped amplifiers
Connector and cable
HD-15 VGA cable, 2 meters length
qualified (for longer runs, contact
QSC’s Technical Services Department)
Over-Temp. Alert
Software adjustable threshold
AC power control
AC mode control
Switches amplifier between
normal and standby mode
Amplifiers
16 amp channels grouped in pairs
Amplifier status monitor
AC power indicator
Indicates operate, standby, or
power-down mode
Clip indicator
Senses channel clipping
Bridge mode status Sense bridge mode setting
Control room foldback monitoring
Output
Sum of Monitor input and
signal from internal monitor
tap point
Signal monitoring buses
(per CM16)
1
Number of Channels
4
Internal signal tap points
Pre-fader input signal
Frequency response
Distortion
Noise floor
Nominal level
Maximum level
Output impedance
Output load
25 Hz–20 kHz 0.5 dB
<0.05% THD @ +4 dBu out
-90.5 dB
+4 dBu
+21 dBu
75 Ohms balanced
600 Ohms minimum
Active balanced
16
16
16
Post-fader input signal
Power amplifier output
Monitor input
Mixed with tap point signal at
unity gain
Nominal level
Maximum level
Input impedance
Configuration
+4 dBu
+21 dBu
10 kOhm balanced
Electronically balanced, shield
connected to chassis
Configuration
Level
Adjusts amplitude of signal from
tap point
Monitor in to monitor out
Control range
0 dB, 0.5 dB
-95.5 to 0 dB in 0.5 dB steps
Common-mode rejection
Typical, >50 dB, 20 Hz - 20 kHz
Worst case, >40 dB, 20 Hz-20kHz
Contact closure inputs and outputs
Inputs
Configuration
1 discrete input (RLY/TRG IN)
Single-ended input
Output
1 discrete output (RLY OUT)
Electromechanical relay, dry
contacts, floating, C, NC, NO
Configuration
Resistance for closure detect <1kOhm max
Resistance for open detect >5 kOhm min
Steady-state current (max.) 0.5 A
Input Voltage Limit
7.000 VDC maximum
Switched current (max.)
Ground isolation
0.25 A
70 volts maximum
“-” input terminal connected to chassis
Connector
“Phoenix-style” (a.k.a.“Euro-style”)
detachable terminal block connectors
34
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 4: Specifications
Network Interface 10BASE-T
Physical network
Raw data rate
Frame format
Connector
Ethernet, IEEE 802.3 compliant
10 megabits per second
D.I.X. (Ethernet)
RJ-45 female
10BASE-T
Transport network
Internetwork protocol
Transport protocol
TCP/IP
IP
UDP
Application protocol
Version
QSC24
1
7
Ethernet type
Cable type
Max cable length 100 m to hub
Grounding Floating
CAT-3 (or better) twisted pair
Revision
Network fail-safe
If network connection to the
CM16a is lost, operation will
continue uninterupted
Factory IP Address Supplied on front-panel sticker
as shipped from factory
RS232 Port
Cable Type
Null-Modem (such as “Laplink”)
Port Settings
Bits per Second
Data Bits
9600
8
Parity
Stop Bits
none
1
Flow Control
Xon/Xoff
General
Physical
Height
Width
AC Power
Voltage
1.72” (1 RU)
100–240 VAC
19” (standard rack mount)
14.84” (37.7 cm), including
rear supports
Current
1.1 A RMS (@ 100V)
1 A RMS (@ 120V)
0.5 A RMS (@ 230V)
Depth
Weight
Mounting
11 lbs (5 kg)
Rear support recommended for
portable or mobile use
Frequency
Disconnect
47– 440 Hz
Detachable power cord with IEC
connector
Operating temperature
0 to 40° Celsius
Fuses
2 Ampere, 250 Volt Rating
5mm diameter, 20 mm length
35
Download from Www.Somanuals.com. All Manuals Search And Download.
SECTION 5 : ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
The Amplifier Network Monitor shall provide input, output, and
status control for DataPort equipped QSC power amplifiers in an
Ethernet-TCP/IP based network audio system. Sixteen indepen-
dent channels shall be provided, grouped in pairs.
Amplifier Input Control and Monitoring—For each of the
Contact Closure I/O—The Amplifier Network Monitor shall
sixteen power amplifier input signals, the CM16a shall
providelevel,muteandpolaritycontrol,preandpostfade
signal level metering and audio monitoring, and select-
able 1Vrms or 3Vrms input sensitivity.
provide a trigger contact-closure sense input which
shall also be CMOS & TTL signal compatible, and one
dry-contact floating SPDT relay output.
Input Trigger Stand-alone Mode- The Amplifier Network
MonitorshallbecapableofrecallinguptotwoPresets
by the triggering of the contact-closure sense input
alone.Theusershallhavetheoptiontoenable/disable
this function.
Page Input- The Amplifier Network Monitor shall provide a page
input, separate from the normal program inputs, whose
signalmaypreempttheprogramsignalofanyorallofthe
sixteen program channels. This input shall have select-
able 1V or 3V sensitivity.
DataNetwork—AllAmplifierNetworkMonitorfunctionsshall
be controlled and monitored via a 10BASE-T Ethernet
digital control network using the IP transport protocol
and the QSControl monitoring application protocol.
Rear-panel connection shall be provided for 10BASE-
T Ethernet. Other than the AC power switch and
manual bypass switch, the Amplifier Network Moni-
tor shall have no manual controls. The Amplifier Net-
work Monitor shall continue to operate uninterupted
should the network connection be lost for any reason.
AmplifierOutputMonitoring—Foreachofthesixteenpower
amplifieroutputs,theAmplifierNetworkMonitor shall
provide clipping detection, short and open circuit de-
tection,voltageandcurrentmetering,andaudiomoni-
toring of the voltage signal.
Amplifier Management—For each of the eight DataPort con-
nections, theAmplifierNetworkMonitorshallprovide
AC standby/operate mode control, AC power state
indication, temperature metering, load status, and
protect status detection.
Amplifier Interface—The Amplifier Network Monitor’s inter-
face to each power amplifier Data Port shall be via an
HD-15 connector. The amplifier interface shall use a
standard personal computer Video Graphics Adapter
(VGA) CRT monitor cable. This interface shall transmit
two amplifier input audio signals as well as all control
and monitoring signals. Special signal conditioning
and grounding techniques shall be used in this inter-
face to ensure negligible levels of noise and crosstalk.
Audio Monitoring Chain—For each of the sixteen program
channels,theAmplifierNetworkMonitorshallprovide
three monitor points as follows: (1) pre-fader control,
(2) post-fader control, or (3) power amplifier output. A
channel’s monitor output may be selected from one of
these three signals, or it may be switched off. The
signal at the Amplifier Network Monitor’s monitor
output connector shall be the sum of the signal at its
monitor input connector and four selected channel
monitor signals. A monitor gain control shall be pro-
vided for each monitor tap point to adjust the indi-
vidual levels of the channel monitor signals prior to
their being mixed with the monitor input signal.
General—All audio inputs and outputs shall be balanced with
a nominal input level of +4 dBu and maximum level of
+21 dBu. Input connectors shall be of the “Phoenix”
detachable terminal strip type.
The Amplifier Network Monitor shall be the QSC CM16a.
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 6: Appendix- Ethernet Cable Pinouts
ETHERNET CABLING
This diagram shows the pinout for standard unshielded twisted-pair (UTP) network cable. Both ends of the cable are wired
identically.
RJ-45pinoutforstandardEthernet
patch cable (both ends identical)
A crossover cable has the RX and TX wire pairs switched around at one end. There are only two likely situations that would require a
crossovercable:toconnectasinglesystemcontrollercomputerdirectlytoasingleCM16adevice;andtocascadehubsthatdon’thaveuplink
ports.
RJ-45 pinout for an Ethernet
crossover cable
RS-232 Null Modem Cable Pinout
CM16a end of cable must be male pins;
computer end of cable is usually female.
37
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 6: Appendix- DataPort Pin-out & Connector P-N’s
DATA PORT PINOUT: The diagram to the right shows the pin assignments
used for the HD-15 connectors on the CM16a and amplifier.
NOTE! This information is shown for reference only and is subject to change without
noticeastheDataPortfeatureisspecifictoQSCproductsandnotintendedforinterface
to other manufacturer’s equipment.
Pin
1
Signal Description
Ch. 1 Minus (-) Input Signal
AC Standby Control
2
3
V-MON Ch. 1 and Subcode 1
I-MON Ch. 1 and Subcode 2
Clip/protect Ch. 1
4
5
6
Hard Ground
7
Ch. 1 Plus (+) Input Signal
Ch. 2 Plus (+) Input Signal
unused for CM16a, +15V on certain amps
Data Reference Ground
Ch. 2 Minus (-) Input Signal
Amp IDR (model ID)]\
8
9
10
11
12
13
14
15
V-MON Ch. 2 and Subcode 1
I-MON Ch. 2 and Subcode 2
Clip/protect Ch.2
RS-232 PINOUT:
The diagram
(right) shows the
pin assignments
for RS-232.
Pin
Signal Description
1
2
3
4
5
6
7
8
9
DCD
RX
TX
DTR
Signal GND
DSR
RTS
CTS
not used
TERMINAL BLOCK CONNECTOR PART NUMBER REFERENCE- The following manufacturers and part numbers are provided as a
reference to users. The information here is subject to change without the knowledge of QSC.
2 pin: Phoenix Contact - 17 57 01 9; Riacon - 31249102-6; On-Shore Tech - EDZ950/2
3 pin: Phoenix Contact - 17 57 02 2; Riacon - 31249103-6; On-Shore Tech - EDZ950/3
5 pin: Phoenix Contact - 17 57 04 8; Riacon - 31249105-6; On-Shore Tech - EDZ950/5
Strain Relief 3 pin: Phoenix Contact 17 76 16 8
Strain Relief 5 pin: Phoenix Contact 17 76 14 2
WEBSITE reference-
Phoenix- phoenixcon.com
Riacon- riaelectronic.com
On-Shore- on-shore.com
38
Download from Www.Somanuals.com. All Manuals Search And Download.
Section 7: How to Contact QSC Audio Products
ADDRESS:
QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
TELEPHONE NUMBERS:
Main Number
(714) 754-6175
Sales Direct Line
Sales & Marketing
Technical Services
(714) 957-7100
(800) 854-4079 toll free in U.S.A. only
(714) 957-7150
(800) 772-2834 toll free in U.S.A. only
FACSIMILE (FAX) NUMBERS:
Sales & Marketing FAX
Technical Services FAX
(714) 754-6174
(714) 754-6173
WORLD WIDE WEB:
39
Download from Www.Somanuals.com. All Manuals Search And Download.
1675 MacArthur Boulevard Costa Mesa, California 92626 USA PH: (714) 754-6175 FAX: (714) 754-6174
“QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office
Download from Www.Somanuals.com. All Manuals Search And Download.
|