675 MacArthur Blvd., Costa Mesa, CA, 92626 USA Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079 Customer Service(714) 957-7150 or toll free (USA only) (800) 772-2834 CM16a Amplifier Network Monitor HARDWARE MANUAL *TD-000086-00* TD-000086-00 Rev.
IMPORTANT SAFETY PRECAUTIONS & EXPLANATION OF 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 user to the presence of important operating and maintenance (servicing) instructions in this manual.
INTRODUCTION- OVERVIEW The QSC CM16a Amplifier Network Monitor provides powerful amplifier management and zone paging capability in a QSControl networked audio system using Ethernet networking technology to communicate with the host computer/system controller. The host computer uses the QSControl application software to operate the networked audio system, including the CM16a’s and their amplifiers. The software operates on the Microsoft Windows NT® version 4.
PHYSICAL CHARACTERISTICS •one rack space high (1RU) and has an •internal, universal 100-240V AC power supply, 47-440 Hertz •chassis depth is 37.7 cm (14.84”) •chassis width, less rack ears, is 43.7 cm (17.
MONITOR FUNCTIONS •Amplifier: Power StatusAmplifier Gain •Amplifier ModelBridge Mode •Load Monitor (impedance)Protection Status •Output VoltageOutput Current •Output Power (real)Heat Sink Temperature (with Over-Temp.) •HeadroomClipping Detect •Output ShortOutput Open •CM16aInput Level MeterOutput Level Meter • Audio Monitor Module (4 channel mono.
FUNCTIONS, BLOCK DIAGRAM & DETAILED DESCRIPTIONS (CONTINUED) AUDIO FUNCTIONS Audio Inputs- These are the 3-pin terminal block connectors used for balanced line level audio-signal input. This type of connector is sometimes called“Phoenix”or “Euro” style. 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.
FUNCTIONS, BLOCK DIAGRAM & DETAILED DESCRIPTIONS (CONTINUED) AUDIO MONITOR CHAIN FUNCTIONS 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). Amplifier Monitor- Monitors the audio at the output of the amplifier (i.e. the speaker terminals of the amplifier).
FUNCTIONS, BLOCK DIAGRAM & DETAILED DESCRIPTIONS (CONTINUED) 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. DAC- This is a digital-to-analog converter that takes digital information from the internal micro controller and outputs the corresponding analog “equivalent” to the appropriate channel PAGE insert points.
NETWORK DESCRIPTION (CONTINUED) The simplest network configuration is a single system controller computer and a CM16a connected by a single Ethernet crossover cable. A standard Ethernet cable would NOT work. The crossovertype cable must be used when connecting the CM16a directly to the system controller computer. This type of cable switches (or crosses over) the transmit and receive signals from one end to the other enabling connection without any intermediate devices.
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).
CONNECTING 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 allow the installer to prewire the input terminations before the CM16a is installed in the rack. It also allows for re-routing of audio inputs by simply interchanging connector locations without the need for any tools. See Appendix for connector manufacturer’s part number reference.
CONNECTING PAGE INPUT The PAGE input connections are the same as the AUDIO INPUT connections. Please refer to the previous page for connector pinout. CONNECTING THE RLY/TRG IN The RLY/TRG IN connector is a two-pin terminal block connector. When using this input for a switch-closure (or opening) event, the two terminals should be connected to the switch contacts directly. This type of event detection can be used with relay contacts as well.
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. DIAGNOSTIC LED- This indicator illuminates during the power-on self test, then should turn off.
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 improvement and therefore this text can not be guaranteed accurate.
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. This interface is not used by the majority of users. But should any system problems arise, the data that may be accessed through this interface can help to track down the problem.
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, right. 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.
DIMENSIONS SPECIFICATIONS PHYSICAL Height Width Depth Weight Mounting Operating temperature 1.72” (1 RU) 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 40° Celsius AC POWER Voltage Current Frequency Disconnect Fuses 18 100–240 VAC 1.1 A RMS (@ 100V) 1 A RMS (@ 120V) 0.
SPECIFICATIONS INPUT SIGNAL PROCESSING Frequency response Distortion Dynamic range Polarity Level control range Precision attenuator Mute 20 Hz–20 kHz ±0.5 dB 10 Hz–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 inverted -95.5 to 0 dB in 0.
CONTROL ROOM FOLDBACK MONITORING Signal monitoring buses (per CM16) Number of Channels Internal signal tap points Monitor input Nominal level Maximum level Input impedance Configuration Common-mode rejection Output Frequency response Distortion Noise floor Nominal level Maximum level Output impedance Output load Configuration Level Monitor in to monitor out Control range 1 4 Pre-fader input signal 16 Post-fader input signal 16 Power amplifier output 16 Mixed with tap point signal at unity gain +4 dBu +21 d
APPENDIXRJ-45 Pinout for an Ethernet Crossover Cable 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 crossover cable: to connect a single system controller computer directly to a single CM16a device; and to cascade hubs that don’t have uplink ports. RS-232 Null Modem Cable Pinout CM16a end of cable must be male pins; computer end of cable is usually female.
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HOW TO CONTACT QSC AUDIO PRODUCTS CÓMO COMUNICARSE CON QSC AUDIO PRODUCTS COMMENT PRENDRE CONTACT AVEC QSC AUDIO PRODUCTS KONTAKTINFORMATIONEN FÜR QSC AUDIO PRODUCTS 㘨㋏ QSC AUDIO PRODUCTS Mailing address: QSC Audio Products, LLC 1675 MacArthur Boulevard Costa Mesa, CA 92626-1468 USA Telephone Numbers: Main Number (714) 754-6175 Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079 Customer Service (714) 957-7150 or toll free (USA only) (800) 772-2834 Facsimile Numbers: Sales & Ma
