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交叉点开关非常适用于视频安全系统,因为视频安全系统要一边接收多个摄像机输入信号,一边进行重放并提供多个环路连接多个监视器。为了提供多个视频环路或监视器输出,这类安全系统常常另外需要能够驱动标准视频负载的多路复用放大器。因此,一个交叉点矩阵开关之后常常连接一个或多个外部多路复用放大器。作为一种替代方法,你可以使用一种32×16无阻挡交叉点矩阵开关,这种开关有16个2:1多路复用器,不需要额外的多路复用放大器(图1)。内部的2:1多路复用器之后是多个视频输出缓
Crosspoint switches are ideal for video security systems because the video security system needs to receive multiple camera input signals while playing back and provide multiple loops to connect multiple monitors. To provide multiple video loops or monitor outputs, such security systems often additionally require multiplexed amplifiers capable of driving standard video loads. Therefore, one or more external multiplexed amplifiers are often connected after a crosspoint matrix switch. As an alternative, you can use a 32 × 16 unobstructed crosspoint matrix switch with 16 2: 1 multiplexers that do not require additional multiplexed amplifiers (Figure 1). The internal 2: 1 multiplexer is followed by multiple video outputs