Introduction

Operating Precautions (continued)

The camera incorporates an AGC circuit. As a re- sult, when it is used under low light conditions, the camera gain may increase automatically. This makes the picture appear uneven , however this is not a malfunction

When equipment that generates strong magne- tism such as a transceiver is used near to the unit while the AGC circuit is ON, beat noise, etc may interfere with the picture. If a transceiver or similar equipment is used, keep it at a distance of at least 3 metres (10 feet) away.

If VN-C655 and the cables connected to VN-C655 are installed at a location where strong electrical or magnetic waves are generated, near a radio, TV set, transformer, motor etc., the quality of im- age and color may be affected.

In auto iris mode, when the AGC circuit is ON, vary- ing the iris with the iris control button may not change the picture brightness. This is due to the automatic gain boost by the V.Networks Control- ler. In this case, set AGC to OFF or use the manual iris mode.

In auto iris mode, the V.Networks Controller may not function under certain brightness conditions (i.e. when a sufficient amount of light cannot be obtained).In this case, set the iris mode to manual.

When the camera is used in ATW (Auto White bal- ance) mode, the colors captured by the camera may differ from the actual colors being shot due to the mechanics of the auto-tracking operation within the white balance circuit. However, this is not a malfunction.

If a very bright object (such as a lamp) is being monitored, the picture may contain vertical lines (smear) above and below the bright object in the picture. This is a normal phenomenon for solid- state image pickup devices (CCD) and is not a malfunction.

When the camera is used to monitor the same position over many hours ( e.g. continuously for 24 hours a day) the contact resistance of the panning mechanism may increase. This may cause the picture to be affected by noise interference or the V.Networks Controller operation becoming un- stable. To prevent this happening, once a week, turn the system off and on in order to initialize the camera and to clean the contacts.

Do not touch the lens on the dome cover directly by hand. Contamination of the cover will lead to deterioration of the picture quality.

Since the dome cover is of a hemispherical shape, the picture tends to become distorted at the edges of the hemisphere. When the camera is tilted and pointed in the horizontal-direction, the picture may be out of focus because the camera will then cap- ture the edges of the hemisphere.

When an object is located near a light source or contains a large difference in brightness, ghosting may occur. This phenomenon is due to the char- acteristics of the dome cover and the built-in lens and is not a malfunction.

Make sure to use the supplied AC adaptor.

Certain hubs and switches equipped with SNMP functions have a broadcast or multicast control func- tion. If the function is enabled, multicast images created by this product may not be viewed prop- erly.

Do not connect cameras other than VN-C655 to the ceiling-mounting bracket. This may cause the equipment to malfunction.

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JVC VN-C655U manual Operating Precautions
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VN-C655U specifications

The JVC VN-C655U is a high-performance network camera specifically designed for surveillance and security use. Ideal for various applications, ranging from corporate environments to public spaces, the VN-C655U brings together cutting-edge technologies that enhance its functionality.

One of the standout features of the VN-C655U is its exceptional image quality. Equipped with a 1/3-inch progressive scan CCD sensor, the camera delivers crisp and clear video at resolutions of up to 640x480 pixels. The progressive scan technology is particularly advantageous as it reduces motion blur, making it suitable for capturing fast-moving subjects. Furthermore, the camera offers a frame rate of up to 30 frames per second, ensuring real-time monitoring without noticeable latency.

The VN-C655U is also designed with versatility in mind. It supports both indoor and outdoor usage, thanks to its robust construction and weather-resistant features. This adaptability ensures that the camera can perform effectively in different environmental conditions. Additionally, the camera is equipped with a 10x optical zoom lens, which allows for detailed close-ups without losing image quality. With a wide field of view, the VN-C655U can cover expansive areas and is perfect for monitoring large facilities.

Connectivity is another key aspect of the VN-C655U. It supports Power over Ethernet (PoE), which allows for simplified installation by streamlining cabling requirements. Users can also access the camera remotely via a web interface, making it easy to configure settings and monitor footage from anywhere using an internet connection. This feature is integral for security personnel needing real-time oversight and control over surveillance operations.

The JVC VN-C655U incorporates advanced image processing technologies, including wide dynamic range (WDR) to handle challenging lighting conditions. This capability ensures clear images, even in high-contrast environments where shadows and bright light coexist. Additionally, the camera supports motion detection, generating alerts and notifications when activity is detected within designated areas, enhancing security and response times.

Overall, the JVC VN-C655U is a feature-rich network camera tailored for modern surveillance needs. With its excellent image quality, versatile design, advanced connectivity, and intelligent monitoring capabilities, it serves as a reliable option for anyone seeking to enhance the security of their premises. Whether for business or public safety applications, the VN-C655U proves to be a valuable asset that combines performance with flexibility.
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