Section 3: Operation- Recalling Presets Using RLY/TRG IN

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. Refer to the Qscontrol software help file for the

most up-to-date information.

MODE #1- Recall Preset 15 when contacts connected to RLY/TRG IN contacts are opened. Restore previous settings when contacts connected to RLY/TRG IN are closed. Preset 14 is used as a “scratchpad” and is OVERWRITTEN. Whatever was in Preset 14 is GONE forever.

Once in this mode, the first time there is a transition from contacts closed to contacts opened, the currently running settings will be saved , and the settings in preset 15 will be recalled. When the contacts attached to the RLY/TRG IN are again closed, the settings will revert to their previous values/positions. This could be used for a paging application where the program inputs are temporarily muted and the page input routed to the outputs; after the page, the sytem reverts back to it’s previous opearting setup.

MODE #2- Recal Preset 15 when the contacts connected to the RLY/TRG IN are closed. Restore previous settings when contacts connected to RLY/TRG IN are opened. Preset 14 is used as a “scratchpad” and is OVERWRITTEN. Whatever was in Preset 14 is GONE forever.

This mode is identical to MODE #1 (above) with the exception that the closed and open contact operation is swapped. Once in this mode, the first time there is a transition from contacts opened to contacts closed, the currently running settings will be saved , and the settings in Preset 15 will be recalled. When the contacts attached to the RLY/TRG IN are again opened, the settings will revert to their previous values/positions.

MODE #3- Recall Preset 14 when the contacts connected to the RLY/TRG IN are closed. Restore Preset 15 when the contacts connected to RLY/TRG IN are opened. In this mode, Preset 14 WILL NOT be overwritten.

Once in this mode, the first time there is a transition from contacts open to contacts closed, Preset 14 will be recalled OR the first time there is a transition from contacts closed to contacts open, Preset 15 will be recalled. After the first transition, the CM16a will toggle between Preset 14 and Preset 15 with the corresponding contact closed/open position.

Note that the presets will only be recalled starting with the first transition of the contacts (opened OR closed). For example, if we are currently running Preset 2 with the contacts connected to RLY/TRG IN closed, and then change to MODE #3, nothing will happen except continuing operation in Preset 2. Now, if the contacts are opened, Preset 15 will be recalled. Finally, if the contacts are closed now, Preset 14 will now be recalled. At this point, you can not recall Preset 2 without using the control software. Only Preset 14 & 15 will be available using the contact I/0.

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QSC Audio CM16a manual Operation- Recalling Presets Using RLY/TRG, Most up-to-date information
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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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