A pan/tilt will not operate quickly or at all after it is used. It is a common fault of the PTZ. The appearance of this situation, apart from the factors of product quality, is generally caused by the following reasons:
1 The pan/tilt head that allows the camera to be mounted is lifted when used. In this case, the hoisting method leads to an increase in the operational load of the pan-tilt. Therefore, soon after use, the pan-tilt mechanism will be damaged, and even the motor will be burned.
2 The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
3 The outdoor pan/tilt head is faulty or even damaged due to bad ambient temperature, too low, waterproof, and frostproof measures.
• When the distance is too far, the camera (including the lens) and the pan/tilt cannot be controlled by the decoder through the operation keyboard.
This is mainly because when the distance is too far, the control signal is attenuated too much and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
The image contrast of the monitor is too small and the image is light.
This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
• The sharpness of the image is not high, the detail is lost, and color signal loss or color saturation is too small when severe.
This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. This situation may be due to the fact that the transmission distance is too long, and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
★ Hue distortion.
This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
★ operation keyboard failure.
This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. On the operating instructions of the keyboard, there are generally methods to solve the "crash", such as "reset the whole machine" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
★ The host does not clean the image.
This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the host or matrix switch and the lack of isolation between images.
1 The pan/tilt head that allows the camera to be mounted is lifted when used. In this case, the hoisting method leads to an increase in the operational load of the pan-tilt. Therefore, soon after use, the pan-tilt mechanism will be damaged, and even the motor will be burned.
2 The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
3 The outdoor pan/tilt head is faulty or even damaged due to bad ambient temperature, too low, waterproof, and frostproof measures.
• When the distance is too far, the camera (including the lens) and the pan/tilt cannot be controlled by the decoder through the operation keyboard.
This is mainly because when the distance is too far, the control signal is attenuated too much and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
The image contrast of the monitor is too small and the image is light.
This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
• The sharpness of the image is not high, the detail is lost, and color signal loss or color saturation is too small when severe.
This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. This situation may be due to the fact that the transmission distance is too long, and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
★ Hue distortion.
This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
★ operation keyboard failure.
This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. On the operating instructions of the keyboard, there are generally methods to solve the "crash", such as "reset the whole machine" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
★ The host does not clean the image.
This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the host or matrix switch and the lack of isolation between images.
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