Manual - AEQ International

D1.2.3. Example of a configuration.The following lines describe a specific configuration as an example of the operating mechanismimplemented in the unit. The values given in this example are merely orientative; it isunderstood that it is the user who, depending on the specific circumstances of the application,will establish the parameters needed to fulfill his or her requirements.Graphic view of the DLP given as an example, with the associated pointsIn the example, the audio signal in TX that comes in with levels below –31dB will be attenuated,which means that the ambient noise is being attenuated. From –31 dB input level, the signal isstrongly amplified, until it reaches the point where –25dB of input produce –18dB on the outputside. In the area between –25 and +2 dB input, the curve evolves from a 7dB gain to a 2dBgain (amplification). From the 2dB input level, the gain is progressively reduced (compression)so that, when the level reaches +18dB, the signal is reduced by 4dB. The transition levelseparates the compression area as the ‘Upper zone’ from the rest, designated 'Lower zone';thus, the attack and release parameters edited in the previous figure would be applied to eachof the two zones.The fundamental difference between a compressor and a limiter lies in the attack and recoverytimes. While a limiter is conceived to eliminate those infrequent, sporadic peaks in the signalthat may saturate it, a compressor is designed to “hold” a high signal modulation in constantmode. Thus, the functional principle of the expander is the same as for a compressor, but withan essential difference: the expander gains signal in constant mode for those low modulationsat all times. We can thus further define a limiter by pointing out that its has short attack andrecovery times in order to act quickly and effectively on those signals that may producesaturation. A compressor should have a longer attack time, and an even longer recovery time,in order to achieve a controlled gain at all times. The same applies to the expander.D2. Edit.From the Edit menu you can manage the modification of a previously created DLP profile. Theconfiguration options are basically the same as when you create a new profile; we thereforerecommend that you consult the previous section and review the steps to follow to make anychange.D3. Delete.This option enables you to eliminate the currently selected DLP profile. The system will ask foryour confirmation.AEQ PHOENIX MOBILE102