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 controls for the IP address settings, system “health” data, firmware version information and other related data.

Typically, 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. The most common items that might be used are “Display Network Settings” and “Enter Network Setup”. The remaining selections would typically be used for troubleshooting purposes along with a QSC technical representative prompting you to access particular menu items so that the data can be interpreted.

The basic setup involves connecting a null-modem type serial cable (or a regular serial cable WITH a null-modem adapter) between 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 Windows-based PC’s) is started up and communication established between the PC and the CM16a.

Below 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 different 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, you will need to follow your software’s instructions for establishing communications through your PC’s COM (serial) port.

1)Connect the RS-232port 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.

2)Open the HyperTerminal program. This program is usually started by clicking the Windows START icon, highlighting PROGRAMS, then ACCESSORIES and finally, highlighting the Hyper Terminal folder and clicking on its icon.

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 a list of what’s in the folder. Identify the Hyper Terminal program icon (or name from the list) and click (or double-click as required) to start the program. In the screen-shot below, the Hyper Terminal icon is the fifth from the left in the row of icons.

HyperTerminal Icon

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QSC Audio CM16a manual Operation- Serial Port I/O Interface
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CM16a specifications

The QSC Audio CM16a is a versatile and powerful amplifier designed to meet the demands of professional audio applications. Known for its reliability and performance, the CM16a is ideal for both live sound and installation scenarios, offering a perfect blend of advanced technology and user-friendly features.

One of the standout features of the CM16a is its Class D amplifier architecture. This technology ensures not only high efficiency but also a lightweight design, making it easier to transport and install in various settings. The amplifier delivers an impressive output power of 1600 watts at 4 ohms, providing ample headroom for demanding audio applications. The CM16a is capable of handling multiple speaker configurations, making it a flexible choice for various setups.

Another key characteristic of the QSC CM16a is its advanced thermal management system. This built-in feature ensures the amplifier operates within safe temperature limits, enhancing reliability and extending the lifespan of the unit. The CM16a also includes an intelligent protection circuit that safeguards the amplifier from overload and short circuits, allowing users to operate it confidently even during intense performances.

The CM16a comes equipped with multiple inputs and outputs, including XLR and TRS connectors, enabling seamless integration with a range of audio sources and systems. This versatility allows for easy connection to mixers, microphones, and instruments, making it suitable for diverse applications from concerts to corporate events.

In addition to its robust performance, the QSC CM16a features an intuitive front panel design with LED indicators for quick monitoring of system status and performance. Users can easily adjust levels and settings, ensuring optimal audio quality for any given situation.

The amplifier is also designed with efficiency in mind, incorporating Power Factor Correction (PFC) technology. This enhances power usage, reducing operational costs while minimizing environmental impact.

In conclusion, the QSC Audio CM16a stands out as a premier choice for audio professionals seeking a reliable, high-performance amplifier that can deliver exceptional sound quality. With its Class D technology, advanced protection features, versatile connectivity, and user-friendly design, the CM16a is a worthy investment for any audio application. Whether for live sound reinforcement or permanent installations, the CM16a promises to meet the needs of even the most demanding audio environments.
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