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1 输出端信号正常 ,同一放大器信号差线路中端信号测试正常 ,收看时低端良好 ,中端信号有斜纹干扰 ,而线路前面用户无此故障。测放大器输出口信号 96ｄＢ左右 ,到用户测信号为 65ｄＢ左右 ,拆看接头、换分支器均不起作用 ,后测放大器输入口信号为 70ｄＢ ,而发现输入端 - 9电?
1 output signal is normal, the same amplifier signal is poor in the middle of the signal line test normal, watch low-end good, mid-signal twill interference, and the front line users without this failure. Measured amplifier output signal 96dB or so, to the user measured signal is about 65dB, disassemble the connector, for the splitter does not work, after the test amplifier input signal is 70dB, and found that the input - 9 power?