Automatic Gain Control (AGC)

AGC adjusts the gain level of a signal based upon the input strength to achieve a more consistent volume. Below the set threshold, the signal is not affected. Above the threshold, weaker signals are boosted up to the maximum gain setting to reach a user‑defined target level. As the signal approaches the target level it receives less gain or no gain at all. Once the signal reaches the target level all gain is removed.

Click in each field to change the values.

Threshold — The input level where maximum gain will be applied (after the attack time is exceeded). On the graph at right, follow the red input level from the lower left to -40 dB where the first red circle is. Signal levels less than -40 dB remain at their original levels. All signal levels at or exceeding -40 dB will have up to 12 dB of gain applied (see Maximum Gain, below).

The threshold level can be adjusted from -80.0 to

0.0dB in 0.1 dB increments. Default is -40.0 dB.

Maximum Gain — The highest amplification applied to a signal exceeding the threshold and up to the lower limit of the window (see Window, below).

Maximum Gain can be set from 0.0 dB to +60 dB in

0.1dB increments. Default is 12.0 dB.

Target — The desired average signal level of the output when AGC is applied. AGC can vary the gain according to the input signal level, specified target level and maximum gain. As the signal approaches the target level of –10 dB, gain is reduced until at –10 dB, gain is no longer applied.

The target level can be adjusted from -40 dB to

0.0dB in 0.1 dB increments. Default is –10.0 dB.

Window — Indicated by the two yellow lines, is a specified range above and below the target level. Below the lower line maximum gain is always applied to the signal. When the signal reaches the window, gain control begins scaling in a linear fashion to achieve smoother results as the signal reaches the target level.

The window range can be set in 0.1 dB increments from 0.0 dB to 20.0 dB. Default is 12.0 dB.

Attack Time — Adjusts the time delay for AGC to engage after the input signal level reaches or exceeds the threshold level.

Attack time can be adjusted from 0.0 to 3000.0 ms in 0.1 ms increments. Default is 500.0 ms.

Hold Time — Adjusts how long AGC continues after the input signal drops below the threshold and before release time begins.

Hold time can be adjusted from 0.0 to 3000.0 ms in 0.1 ms increments. Default is 0.0 ms.

Release Time — Adjusts the time it takes to return the signal to normal (unprocessed) levels after the signal no longer exceeds the threshold level setting. Release time begins only after hold time is reached.

Release time can be adjusted from 10.0 to 10000.0 ms in 0.1 ms increments. Default is 1500.0 ms.

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Extron electronic DMP 64 manual Automatic Gain Control AGC
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DMP 64 specifications

The Extron DMP 64 is a versatile digital matrix processor that is specifically designed for handling multi-channel audio signal distribution in a variety of applications. As a part of the Extron family of audio products, the DMP 64 is particularly well-suited for educational institutions, corporate environments, and other professional settings where high-quality audio management is paramount.

One of the standout features of the DMP 64 is its six inputs and four outputs configuration, allowing users to mix and route audio signals with ease. This flexibility is crucial in environments like lecture halls or corporate meeting rooms where multiple audio sources may need to be controlled simultaneously. The DMP 64 supports a wide range of audio formats and operates seamlessly with both balanced and unbalanced audio signals. This ensures compatibility with various microphones, speakers, and other audio devices.

The technology behind the DMP 64 includes Extron's innovative ProDSP, which enhances audio processing capabilities. ProDSP allows for high-quality sound processing through advanced algorithms that provide features such as equalization, compression, and limiting. The processor also includes preset recall functionality, enabling users to quickly switch between different audio setups as needed. This can be particularly beneficial in dynamic environments where quick adjustments are often required.

Another important characteristic of the DMP 64 is its user-friendly interface. With intuitive controls that are easy to navigate, users can quickly access and adjust audio settings without the need for extensive training. The device supports Extron's Global Configurator and GUI Designer software, allowing for remote control and customization of the audio system easily. This integration is essential for system integrators who want to create tailored solutions for their clients.

The DMP 64 also features an integrated web interface, providing a convenient way to manage the system from any connected device. This capability makes troubleshooting and system management straightforward and efficient, especially for tech support teams who may need to address issues remotely.

In addition, the unit is designed with robust connectivity options, including Ethernet for control and monitoring, as well as standard audio inputs and outputs. Built with reliability in mind, the DMP 64 is housed in a sturdy chassis, ensuring it can withstand the demands of everyday use in professional settings.

Overall, the Extron DMP 64 combines advanced audio processing technology with user-friendly design and features that cater to the needs of today’s audio/video environments. Its flexibility, reliability, and high-quality sound management make it an ideal choice for diverse applications, from classroom environments to corporate meeting spaces. Whether it’s for conferencing, presentations, or events, the DMP 64 stands out as a powerful tool in professional audio management.
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