Possible reasons might be that the power board is broken. Especially in low light conditions, when AGC is automatically activated and current consumption increases, the issue becomes more visible.
Please check if the transformer output is normal or if the transformer wire has been cut and extended. You may try replacing the transformer or avoid extending the transformer's output power wire.
It might be due to improper soldering when the wire was not long enough during installation, leading to desynchronization. It could also be caused by interference from the surrounding environment affecting the signal line.
Please check the impedance of the cable between the signal and monitor, or verify if the monitor is for multiple viewing points. You may try replacing the cable, or use a distribution amplifier if monitoring multiple points.
Image Pixels: 1. Specified Pixels: 270,000 points (537x505), 410,000 points (811x508). 2. Effective Pixels: 250,000 points (510x494), 380,000 points (768x494). The higher the pixel count, the more delicate the image, but the higher the cost.
The resolution of the camera is directly proportional to the number of image pixels.
System | Pixel Count | Resolution |
---|---|---|
Black & White System | 250,000 points | 330-380 lines |
Black & White System | 330,000 points | 460 lines |
Black & White System | 410,000 points | 600 lines |
Color System | 250,000 points | 330 lines |
Color System | 330,000 points | 400 lines |
Color System | 410,000 points | 480 lines |
CCTV stands for Closed Circuit Television, which means a closed-circuit television system. It uses electrical principles to convert the image light captured by an optical lens into electric power through a chip (CCD) or imaging tube inside the camera, and then transmits it to a monitor through cables and various auxiliary devices, converting electric power back into light energy to be displayed on the screen.
Most modern systems, except for special applications, use CCD cameras. This trend will continue in the future. CCD (charge-coupled device) is an imaging component that converts light into electrical charges, stores and transfers these charges, and extracts them to produce voltage changes.
Compared with imaging tube cameras, CCD cameras have the following advantages:
CCD cameras are available in various sizes such as 2/3 inch, 1/2 inch, and 1/3 inch. Due to smaller image surfaces, the number of pixels and sensitivity are reduced accordingly. Recently, this issue has been resolved, and to save costs, manufacturers mostly use 1/3 inch CCDs.
Resolution typically refers to horizontal resolution unless specified otherwise.
For monitoring the position of a scene or the movement of a scene, black and white cameras are recommended. Color cameras are suitable for real-time monitoring to identify specific details of a scene. Generally, black and white cameras are more sensitive than color cameras, making them suitable for low-light areas or locations where lighting cannot be installed at night.
Select a camera based on the brightness of the installation site. If the brightness exceeds the minimum subject illumination by more than ten times, the image will be clear.
蘊藏許多助人的知識與智慧。