而且我们还召集了提供闭路电视信号公司的老闆，协助调查。
We have also summoned the owners of the cable firm to investigate the incident.
介绍了闭路电视前端设备控制系统的原理和作用，着重说明了电源控制、信号切换控制的原理和电路，以及控制流程图与软件。
The principle and the action of CATV device control system is introduced. The hardware and the software of the controller of power, how to deal with the switch method of remote signal is explained.
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