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.
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