There are many types of surveillance cameras currently on the market there are many high imitation camera technology, high imitation camera when in use, compared to the regular camera has many faults, such encounter PTZ use soon dysfunctional Or can not turn the issue here is to give an analysis of the specific reasons: 1, too far away when the camera can not operate the keyboard cameras (including lenses) and PTZ remotely via decoders. The main reason for this phenomenon is that because the distance is too far, the effect of the operation panel control signal will be greatly reduced installation and maintenance, monitoring, control signal decoder receives in this case will be too weak. Then the relay box should be installed in a certain distance to amplify the control signal. Security monitoring devices ? This safety monitoring device uses SONY high sensitivity image sensor, the output resolution images · backlight compensation function * Low power consumption of this security monitoring equipment, stable performance monitoring installation, true 24-hour surveillance · infrared light using pulse drive way closed-circuit surveillance installation, which can effectively reduce the heat of infrared light and extend its life in order to do a good job monitoring equipment maintenance and repair center is equipped with appropriate human and material resources (tools, communications equipment, etc.) residential surveillance installation, responsible for the daily monitoring system monitoring, maintenance, service, management, equipment maintenance services to assume in order to safeguard the long-term monitoring system, reliable and efficient operation. Closed-circuit surveillance installation, repair and maintenance information source (certified), Ying Yang surveillance installation provided by Zhengzhou source maintenance Electronic Technology Co., Zhengzhou source maintenance Electronic Technology Co., Ltd. (www.hnxywb.com) is a leader in Zhengzhou, integrated monitoring system, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In leading source maintenance staff warmly welcome all inquiries negotiations to create a better source of future maintenance.