英文原文

Airport Public Address System

General description

Elason Public Address system is a multi-function system that includes signal processing, powerful software and evolutive microphone stations. This innovative concept allow us to create a specific announcementssystem based on the needs of our customers. Easy to install and to use it gives quality to improve airport communication and reliability.

System Architecture

The Elason PA system uses a network configuration rather than having all system elements connected to a central controller. This architecture gives real freedom in system design. A system is composed of modular elements which make the equipment suitable to environment and use constraints. This technology allows the conception of more or less complicated installation and guarantees a lasting quality. The network links cabinets together. A system can operate with up to 16 cabinets. Each cabinet contains the required basic components to control all the equipments (audio sources, power amplifier and speakers) connected to it. The flexible system architecture allows any type of equipment to be located wherever is most suitable in the building. There is any heart in the system which means that system can still operate when an electronic failure appears.

Synoptic Diagram

The following diagram explains the link between the different parts of the system. In particular data and audio are separate between Call Stations and Matrix. Regarding the bus linking each cabinet few possibilities are available:

• Separate data and audio channels (analog)
• Ethernet support for audio and data (digital)
• Optic support for audio and data (digital)

The maximum number of audio channels on the bus which links the cabinets is 16. Each cabinet can manage inputs or outputs according the architecture needed. For example in the diagram hereafter, the cabinet 1 manage any output (amplifiers) but only inputs (sources). Cabinets 2 and 3 control both sources and amplifiers.

Cabinet Mainframe

Mainframe is totally modular so we can build a system based on your needs. It contains space for cards which means that the system is expandable. You can grow up your installation when you need.

Unit control

• A Unit of Control (UC) in each cabinet monitors all the electronic cards, stores all control information and configuration settings (flash card) as well as automatically reloading configurations in case of card remove.
• Allows configuration, diagnostics and logging from remote locations from a PC.
• Constantly monitors all system components and reports any changes in status.
• Provides control inputs and outputs.

Input / Output (Matrix)

Matrix is composed of I/O cards which control either 1 audio source or 2 power amplifiers. These cards include a built in preamplifier and are controlled through a microchip processor. The number of cards depends on the number of connected equipment. I/O cards can be added at a later date which gives the system easily expandable.

An I/O stores configuration

• Constantly monitors the connected equipment (audio source or amplifier) and reports any changes in status.
• Provides control inputs and outputs.

• Tone control and processing units are controlled either by microchip processors

• Allows the creation of high capacity sets with multiple inputs and outputs
• Commutation units guaranty security function

Announcement desks

Announcement desk with programmable push buttons provide the following functionsadaptable to your airport:

Make announcements to individual zones or group of zones, such as gate or baggage area, etc… or of course the entire terminal.

• Record and play messages (MP3) which can be locally stored

Power amplifiers

Power amplifier unit formats are 2U 19”, balanced input 6dB and 100 volts line output. It has its own power supply, integrated monitoring and fault identifying system and built-in automatic backup switching in case of failure. The standard range is made up of 80, 150 and 250 watts units.

High-efficiency amplifiers for closer stacking in a 19" rack.

• Audio processing and adjustable audio settings as equalizer
• Amplifier and loudspeaker line monitoring and spare amplifier switching.
• Ambient microphone connection enables output level adjustment in real timefor maximum intelligibility.
• Control inputs and programmable output relays for specifics functions.

Test system

Test system (EN 60949 compliant) allows checking the whole components of the installation from the microphones up to the speakers. This part includes a diagnostic software, hardware led indicators and audio monitoring of all tested parts of the installation. A computer’s connected to one of the cabinet can display technical failures and historic events.

中文译文

机场公共广播系统

大致介绍

埃勒森公共广播系统是一种多功能系统，其中包括了信号处理、有效的运行软件和改进的麦克风托架。这一创新的理念使我公司成功地开发了一项基于特定客户需要的特殊广播系统。该系统易于安装，操作简便，能够有效提高机场内的沟通质量及其可靠性。

系统构成

埃勒森公共广播系统采用网络结构，而不是把各个系统要素连接到一个中央控制器上，而这样的结构使得系统设计获得了真正的自由。这一系统是由模数化部件构成的，而这些部件使设备能够适应环境、并能调动约束机制。该技术令相对复杂的安装构思成为可能，且保证了系统的恒久品质。该网络使各控制室相互联系。一个系统可与16个控制室同时运行，每个控制室都具备必需的基本组件，用来控制所有与控制室相连的设备（音频来源、功率放大器和高音喇叭）。灵活的系统构成更可将任何种类的设备安装在大楼中最适合的位置。在这个系统中，每一处都是中心；这就意味着即便出现一处电子故障，该系统仍能正常运行。

略图

以下图表阐明了系统各部分之间的关系。值得一提的是，呼叫站与矩阵间的数据和音频是分开的。至于连接各控制室的数据传输母线，可能性较少。（原文似断句有误）

• 分开的数据与音频通路（模拟）
• 以太网支持音频与数据（数字式）
• 光学支持音频与数据（数字式）

数据传输母线上连接各控制室的音频通路的最大数量为16。每个控制室都能依据所需的结构进行输入或输出操作。例如在下述图表中，控制室1就无法处理输出（扩音器）而只能进行输入（来源）。控制室2和3则两者皆可兼顾。

控制室主机

主机完全是模块化的，这才使我们能够根据您的需要创建系统。系统中包含可供插卡的空间，从而使该系统具有可扩展性。在必要时，您就能扩大装置。

单位控制

• 每个控制室中的一个控制单位监测着所有的电子卡，储存所有的控制信息和结构设置（闪光记录卡）、以及自动重置的结构，以防记录卡被移开。
• 允许来自远程个人电脑的配置、诊断程序和记录的运行。
• 定期监测各系统元件，若有异常情况应及时上报。
• 提供控制输入与输出。

输入/输出（矩阵） 

矩阵是由输入/输出卡构成的，它们或控制一个音频输出源，或控制两个功率放大器。这些卡中包含一个内置的前置放大器，是通过一个微芯片处理器来控制的。卡的数量取决于它们所连接的设备的数量。输入/输出卡可稍后添加，从而有利于系统的扩展。 

• 输入/输出卡储存配置
• 定期检查所连接设备（音频源或放大器），若有异常情况应及时上报。
• 提供控制输入和输出。

• 音调控制和处理部件是由微芯片处理器进行控制的。

• 允许建立具有多端输入和输出的高性能组件。
• 交换部件保证安全运行

广播台

具有可编程按钮的广播台具备如下功能，您可选用贵机场所需功能进行调适：

• 对单独区域或一组区域进行广播，例如机场大门或行李领取处等，当然也包括整个航站楼。
• 记录并播放能够本地存储的信息（MP3）。

Power amplifiers功率放大器

功率放大器的单位形式是2U 19”， 6分贝平衡输入和100伏水平输出。功率放大器自身配备电源，综合的监测与纠错系统，以及内置的自动备份开关，以应付机器失灵。其标准范围由80、150和250瓦的单位构成。

高效放大器，可保证19"托架上更紧密的堆叠。

• 音频处理和用作平衡装置的可调适的音频设置
• 对放大器和扩音器的线路监测及备用的放大器开关
• 周围的扩音器连接可帮助实现实时的输出水平调适，从而达到最高的清晰度。
• 具备特定功用的控制输入和可编程输出继电器。

测试系统

测试系统（EN60949灵活系统）能够检查装置中的所有元件，上至麦克风，下至高音喇叭。该部分系统中含有一个诊断软件、硬件显示器及对受测装置的所有部分进行的音频监测。与其中一个控制室连接的一台电脑能够显示系统的技术缺陷和过往出现的问题。