What is the Access™ System?
The Access™ System consists of a variety of intelligent switching modules. These modules communicate with each other via the “system bus,” allowing you to construct the exact demonstration system configuration you desire from the sources, processors/equalizers, amplifiers, speakers, and subwoofers in your display. The switching modules are located near the actual products on display creating a “distributed switching net- work.” The products are connected to the modules rather than being wired to one central point. Selected product signals are then sent across the network through “buses” that interconnect the modules. A simplified view is shown below.
Figure 1.
Control
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CONTROL PANEL CABLE
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SYSTEM BUS
Amplifier
Switching
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Speaker
Switching
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DEFINITION OF TERMS
To successfully install your new Access Demonstration Network, you should familiarize yourself with the following terms:
Address | A number that pinpoints the identity and location of a |
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| switch module within a system. The installer sets numeric |
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| switches like the ones in Figure 2 for each module which |
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| provides a unique address in the proper sequence for each |
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| component connected to the system. | Figure 2. This example shows an |
AutoDamping™ | When merchandising many pairs of different speakers in a | address setting of 0/00. Typically |
this would represent the first | ||
| showroom, the drivers of the unselected speaker pairs | module (components 1 through 4) |
| become passive radiators when the currently active | in the Source Product Group. |
| speaker pair is playing, absorbing much of the sound |
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| coming from the speakers being played. AutoDamping™ is a circuit in the Model 932 that | |
| electrically disconnects (shorts) speakers not being played, thereby automatically damping | |
| them as passive radiators and improving sound quality in the showroom. | |
Bus | A Bus is a pathway for signals to travel from module to module; a cable connecting | |
| modules. There are three types of buses found in most AccessEZ Systems: | |
•System Bus A four wire harness (red, black, yellow, blue) connected to every AccessEZ module. The System Bus carries the signals that control the selection of the components and perform various housekeeping functions among the modules in the system.
•Speaker Bus (or High Level Bus) A four wire harness (green, white, brown, gray) that carries
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