CM16a
N E T W O R K
A U D I O
P r e l i m i n a r y
CM16a
S Y S T E M S
S p e c i f i c a t i o n s
Multi Signal Processor
Front View
Rear View
The CM16a MultiSignal Processor is a key hardware component of QSControl, QSC's Ethernet based audio network. The CM16a
provides sixteen channels of gain control, monitoring, and amplifier management for DataPort-equipped QSC amplifiers. The CM16a
is operated remotely by a Pentium-based PC or QSC System Controller running QSControl application software. Control and monitoring
data is communicated between the Pentium-based PC or QSC System Controller and CM16a via an Ethernet network.The CM16a, located
in the amplifier rack, is linked to each amplifier via a DataPort.
CM16a Input / Output Control & Monitoring
Amplifier Management
• Input sensitivity selection:1V or 3V
• Input source select:Normal/Page
• Gain control
• Pre-/Post-fader audio signal monitoring
• Mute control
• Signal polarity control
• Signal level metering
• AC standby/operate mode selection
• AC mode indication (off/standby/operate)
• Amplifier protect status monitoring
• Amplifier operating temperature metering
• Amplifier gain control monitoring
• Amplifier model ID indication
• Bridge Mono/Parallel/Stereo mode indication
Amplifier Output Monitoring
Other Features
• Output voltage and current metering
• Amplifier output power in watts
• Output clip detection monitoring
• Amplifier headroom metering
• Output signal (speaker terminal) audio monitoring
• Sixteen configuration presets
• External RS232 port for diagnostics and preset control
• Internal Audio DAC (Digital to Analog Converter) for system diagnostics,
Load Monitoring
• Open / shorted load detection
• Programmable threshold for detecting load opens and shorts
• Real-time load impedance measurement
load impedance measurement,or playback of audio files
• Contact closure input
• Page input with selectable 1V or 3V sensitivity
• One floating dry-contact SPDT relay output
• Single-line balanced summing audio monitor bus
• Front-panel bypass switch
• Firmware updateable via network to add future upgrades
Hear the Power of Technology.
1675 MacArthur Boulevard
Costa Mesa, CA 92626
Ph: 800/854-4079 or 714/957-7100
Fax: 714/754-6174
Web: www.qscaudio.com
Email: [email protected]
B L O C K
D I A G R A M
O F
T H E
C M 1 6 a
Typical QSControl Network
QSController and
QSControl Software
Located either on or off site.
Ethernet Hub
QSC CM16a Processor
Audio Signals
Ethernet Connection
Audio Control and Monitor
(DataPort Cable)
QSC Amplifiers
041000
QSC Audio Inc. 1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174 • www.qscaudio.com
POWER AMPLIFIER MANAGEMENT
INPUT SIGNAL
FREQUENCY RESPONSE:
DISTORTION:
DYNAMIC RANGE:
POLARITY:
LEVEL CONTROL RANGE:
PRECISION ATTENUATOR
TRANSIENTS (“Zipper Noise”):
MUTE:
INPUTS:
Program inputs
Paging input
Monitor bus input
Connector type
Type
Grounding
Nominal level
Maximum level
Inpedance
Common-mode rejection
20 Hz to 20 kHz, ±0.5 dB
10 Hz to 80 kHz ±3 dB
< 0.01% THD+N @ +4 dBu out
(page input <0.03%)
>110 dB unweighted (20 Hz–20 kHz)
(page input >100 dB)
In-phase or reversed
-95.5 to 0 dB in 0.5 dB steps
better than 112 dB below maximum output
> 90 dB attenuation
16
1
1
“Phoenix-style”(a.k.a.“Euro-style)
detachable terminal blocks
Electronically balanced
All shield terminals connected to chassis
1V/3V rms selectable
+21 dBu
25 kΩ balanced
Typical, >50 dB, 20 Hz-20 kHz
Worst Case, >40 dB at 20 kHz
rolling off to >40 dB at 20 kHz
Crosstalk (inter-channel
within Data Port pair)
> 75 dB separation (20 Hz–20 kHz)
Crosstalk (intra-channel
between Data Ports)
>90 dB separation, 20 Hz-20 kHz
measured with all inputs and
outputs terminated
OUTPUTS:
Program outputs
Connector type
Monitor output
Cable type
Qualified length
Monitor output
Connector
Type
Grounding
Nominal level
Maximum level
Output impedance
Output load
16 (via HD-15)
8 HD-15 data port connections
1
VGA monitor cable
2 meters
1
“Phoenix-style”(a.k.a.“Euro-style”)
detachable terminal blocks
Electronically balanced
Shield terminal connected to chassis
+4 dBu
+21 dBu
75Ω balanced
600Ω min
POWER AMPLIFIER OUTPUT MONITORING
OUTPUT SHORT DETECT:*
Senses load < 1Ω for Stereo/Parallel modes;
< 2Ω Bridge Mono mode
OUTPUT OPEN DETECT:*
OUTPUT VOLTAGE METER:
OUTPUT CURRENT METER:
Threshold is adjustable in software
Senses load > 60Ω
Threshold is adjustable in software
Range automatically matches to
amplifier model used
Range automatically matches to
amplifier model used
*Signal level must be higher than -32 dB, referenced to maximum output of amplifier
POWER AMPLIFIER INTERFACE:
Compatibility
Connector and cable
AMPLIFIERS:
QSC Data Port equipped amps
HD-15 VGA cable, 2 meters length
qualified (for longer runs, contact QSC’s
Technical Services Department
Up to eight 2-channel amplifiers or four
4-channel amplifiers (or some combination
thereof)
AC POWER CONTROL:
AC mode control
AC power indicator
Switches amplifier between normal
and standby mode
Indicates operate, standby, or
power-down mode
AMPLIFIER STATUS MONITOR:
Clip indicator
Protect indicator
Temperature meter
Over-temp. alert
Senses channel clip status
Senses amplifier protect status
Reports amplifier operating temperature
(above 50°C)
Software adjustable threshold
CONTROL ROOM FOLDBACK MONITORING
NUMBER OF SIGNAL
MONITORING BUSES PER CM16a:
NUMBER OF CHANNELS PER CM16a:
INTERNAL SIGNAL MONITOR POINTS
(EACH WITH AN ATTENUATOR):
Pre-fader input signal
Post-fader input signal
Power amplifier output
MONITOR INPUT:
Nominal level
Maximum level
Input impedance
Configuration
Common-mode rejection
OUTPUT:
Frequency response:
Distortion:
Dynamic range
Noise floor:
Nominal level:
Maximum level:
Output impedance:
Output load:
Configuration:
LEVEL:
Monitor in to monitor out
Control range
1
4
16
16
16
Mixed with tap point signal at unity gain
+4 dBu
+21 dBu
10kΩ balanced
Active balanced, shield connected to chassis
Worst case, >54 dB at 20 Hz rolling off to
>40 dB at 20 kHz
Typical case, >50 dB 20 Hz-20 kHz
Sum of monitor input and signals from
internal monitor tap point
20 Hz–20 kHz ± 0.5 dB
< .05% THD @ +4 dBu out
> 90.5 dB unweighted, 22 Hz–22 kHz
-90.5 dB
+4 dBu
+21 dBu
75Ω balanced
600Ω min
Active balanced
Adjusts amplitude of signal from tap point
0 dB, ±1 dB
-95.5 to 0 dB in .5 dB steps
INTERNAL DIGITAL TO ANALOG CONVERTER (DAC)
Internally generated test signals or pre-stored .WAV files can be routed to any/all inputs. This
preempts the paging input. .WAV files are network downloadable and can be stored to CM16a
internal memory.
CONTACT CLOSURE INPUTS AND OUTPUTS
ARCHITECT’S AND ENGINEER’S SPECIFICATIONS
INPUTS:
The CM16a Power Amplifier Controller shall provide input, output, and status control for Data
Port equipped QSC power amplifiers in an Ethernet-TCP/IP based network audio system.
Sixteen independent channels shall be provided, grouped in pairs to support up to sixteen
power amplifier channels.
Configuration
Resistance for closure detect
Resistance for open detect
Input voltage limit
Ground limits
(“-”input terminal)
OUTPUT:
Configuration
Maximum steady-state current
Maximum switched current
Ground isolation
CONNECTOR:
1 discrete inputs
Single-ended input.
< 1kΩ max
> 5kΩ min
7.000 VDC maximum
Potential to case: 3V maximum
Resistance to case:100Ω
1 discrete output
Electromechanical relay, dry contacts,
floating, C, NC, NO
0.5A
0.25A
70V maximum
“Phoenix-style”(a.k.a.“Euro-style”)
detachable terminal block connectors
Raw data rate
Frame format
Connector
Ethernet type
Cable type
Max cable length
Grounding
TRANSPORT NETWORK:
Internetwork protocol
Transport protocol
APPLICATION PROTOCOL:
Version
Revision
Ethernet
10 megabits per second
D.I.X. (Ethernet)
RJ-45 female
10BASE-T: (via RJ-45)
10BASE-T: CAT-3 (or better) twisted pair
10BASE-T: 100 m to hub
Floating
TCP/IP
IP
UDP
QSC24
1
7
RS232 PORT
CABLE TYPE
PORT SETTINGS
Null-Modem (a.k.a. Laplink)
Bits per Second
9600
Data Bits
8
Parity
none
Stop Bits
1
Flow Control
Xon/Xoff
GENERAL
PHYSICAL
Height:
Width:
Depth:
Weight
Mounting:
Operating Temp.:
1.72”(1RU)
19”(standard rack mount)
14.84”(37.7 cm), including rear supports
11 lbs. (5 kg)
Rear support recommended for portable
or mobile use
0 to 50° C
AC POWER:
Voltage
Current
Frequency
Specifications subject to change
The CM16a shall provide a page input, separate from the normal program inputs, whose signal
may preempt the program signal of any or all of the sixteen program channels.This input shall
have selectable +4 dBu/-10 dBV (3V/1V) sensitivity.
The CM16a shall provide an internal Digital to Analog converter circuit. Such circuit shall be
used for generating test signals and for playback of pre-recorded .WAV files. These .WAV files
shall be network downloadable and storable in the CM16a’s on-board memory. As with the
page input, this DAC circuit may preempt any or all of the sixteen program channels.
The CM16a shall provide for the storage and recall of up to sixteen different presets,numbered
0 through 15. Each preset shall be a "snapshot" of all of the CM16a functions and settings.
Preset #0 shall be the default boot-up preset.
NETWORK INTERFACE
PHYSICAL NETWORK:
Amplifier Input Control and Monitoring. For each of the sixteen power amplifier input signals,
the CM16a shall provide gain,mute and polarity control,pre- and post-fade signal level metering
and audio monitoring, and selectable +4 dBu/-10 dBV (3V/1V) input sensitivity.
100-240 VAC (Universal Supply)
1A RMS @ 120V, 1.1A RMS @ 100V,
0.5A RMS @ 230V
47–440 Hz
Amplifier Output Monitoring.For each of the sixteen power amplifier outputs,the CM16a shall
provide clip detect monitoring,short/open circuit detect,voltage and current metering,amplifier
headroom, load impedance, real output power to load, and audio monitoring of the voltage
signal.
Amplifier Management. For each of the eight dual-channel power amplifiers, the CM16a shall
provide AC standby/operate mode control, AC power state indication, temperature metering,
amp gain settings (front panel knob position with respect to full output), over-temperature
detection,stereo/parallel/bridge-mono indication,amplifier model detection,and protect status
detection (subject to the capabilities of each amplifier).
Audio Monitoring Chain. For each of the sixteen program channels, the CM16a shall provide
three monitor points as follows:(1) pre fader gain control,(2) post fader gain control,or (3) post
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 CM16a’s monitor output connector shall be
the sum of the signal at its monitor input connector and as many as four of the sixteen channel monitor signals at one time per CM16a. A monitor gain control shall be provided for each
monitor tap point to adjust the individual levels of the channel monitor signals prior to their
being mixed with the monitor input signal.
Contact Closure I/O. The CM16a shall provide one trigger contact-closure sense input which
shall also be TTL signal compatible, and one dry-contact floating SPDT relay output. These
shall be under software control, with functions definable by the QSControl custom software
application.
Data Network. All CM16a functions shall be controlled and monitored via an Ethernet digital
control network using the TCP/IP transport protocol and the Q5C24 control and monitoring
application protocol.Rear-panel connections shall be provided for 10BASE-T Ethernet utilizing
a standard RJ45 Unshielded Twisted Pair Category-5 connection. Other than the AC power
switch,the CM16a shall have no manual controls. A 9-pin,"D" subminiature connector shall be
provided to allow interfacing to an RS-232 connection. This connector shall be used for
firmware upgrades as well as device testing and diagnosis via a computer’s COM port.
Amplifier Interface. The CM16a’s interface to each power amplifier Data Port shall be via a
miniature 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 interface to ensure negligible levels of noise
and crosstalk.
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 "Euro-style" depluggable
barrier strip type.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement