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The network amplifier monitor device shall operate from 47–440 Hz AC power and shall be equipped with a 320-C19 16A IEC mains connector. The device shall operate safely from 100-240 VAC AC outlets, and shall have a removable power cord. Current draw shall be 1A RMS at 120V, 1.1A RMS at 100V and 0.5A RMS at 230V. The device shall comply with FCC part 15 Class B requirements.
The network amplifier monitor shall provide input, output, status monitoring, and control for QSC DataPort-equipped 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.
For each of the sixteen power amplifier input signals, the network amplifier monitor shall provide level, mute and polarity control, pre- and post-fader signal level metering and audio monitoring, and selectable +4 dBu/-10 dBV (3V/1V) input sensitivity.
The network amplifier monitor 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 network amplifier monitor 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 network amplifier monitor functions and settings. Preset #0 shall be the default boot-up preset.
For each of the sixteen power amplifier outputs, the network amplifier monitor 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.
For each of the DataPort connected power amplifiers, the network amplifier monitor 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).
For each of the sixteen program channels, the network amplifier monitor shall provide three monitor points as follows: (1) pre-fader level control, (2) post-fader level 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 network amplifier monitor'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 network amplifier monitor. A monitor level 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.
The network amplifier monitor shall provide 1 trigger contact-closure sense input which shall also be TTL signal compatible, and 1 dry-contact floating SPDT relay output. These shall be under software control, with functions definable by the QSControl custom software application. The contact closure sense input shall be capable of toggling between presets 14 and 15, regardless of the computer's connection status.
All network amplifier monitor functions shall be controlled and monitored via an Ethernet digital control network using the TCP/IP transport protocol and the QSC-24 control and monitoring application protocol. Rear-panel connections shall be provided for 10BASE-T Ethernet utilizing a standard RJ-45 Unshielded Twisted Pair Category-5 connection. Other than the AC power and bypass switches, the network amplifier monitor 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 network amplifier monitor setup, testing, diagnostics, and limited control functions.
The network amplifier monitor's interface to each power amplifier shall be via an HD-15 DataPort 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.
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 phoenix/euro.
The network amplifier monitor chassis shall occupy one rack space and have provisions for securing the rear corners. Depth from mounting surface to tips of rear supports shall be 14.84 in. (37.7cm). The network amplifier monitor’s weight shall not exceed 11.0 lb. (5.0 kg).
The network amplifier monitor shall be the QSC Audio Products CM16a.
QSC and the QSC logo are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and other countries. All other trademarks are the property of their respective owners. Patents may apply or be pending.
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