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有线电视电缆传输系统中,同轴供电具有电压低、电流大的特点。随着城市规划建设的发展,城区规模的扩大,有线电视发展迅速,网络规模不断扩大。这样,同轴供电设计的成功与否,成为系统稳定性的重要方面,因此考虑电缆的温度系数在高温季节造成电缆压降增大而对放大器供电电压的影响,是同轴供电设计的重要方面。下面以实例进行计算说明。 如图1所示,由供电电源N供电运行的我台有线电视局部网络图。
Cable television cable transmission system, the coaxial power supply with low voltage, large current. With the development of urban planning and construction and the expansion of urban area, the rapid development of CATV and the continuous expansion of the network scale. In this way, the success of coaxial power supply design has become an important aspect of system stability, so consider the temperature coefficient of cable in high temperature season caused by the cable voltage drop increases the supply voltage of the amplifier, coaxial power supply design is an important aspect . The following examples to illustrate. Shown in Figure 1, by the power supply N to run my local cable television network map.