DC Sources for Telecommunications Equipment Test Systems
应用文章
When selecting DC sources for test systems for telecommunications equipment one must take industry standards on DC power into consideration. DC power distribution buses of +24, -48 and, to a lesser extent, -60 volts for reliably power telecommunications equipment installations are well proven over many years of being in use. These are not tightly regulated voltage levels. Due to a number of factors the actual voltage range extends considerably above and below these stated levels as defined by industry standards, including the North American International Electrotechnical Commission (IEC) 60950 and the European Telecommunications Standards Institute (ETSI) 300-132-2. During test the system DC power supply must be able to likewise provide the appropriate voltage extremes for powering the telecommunications equipment.