Free Axis Communications ANVE Practice Exam with Questions & Answers | Set: 7

Accelerometers are used in Axis cameras primarily for shock detection. They detect sudden movements or impacts that might indicate tampering or vandalism. When a shock is detected, the camera can trigger alerts or initiate protective actions to safeguard the device and maintain surveillance integrity. Axis technical specifications detail the use of accelerometers in various models for enhanced security through shock detection.

Fiber optic cables are ideal for long-distance data transmission due to their low signal attenuation and high bandwidth capabilities. Unlike copper cables, fiber optics can transmit data over several kilometers without significant loss of signal quality. They are also immune to electromagnetic interference, making them suitable for environments with high electrical noise. Axis technical references on networking confirm that fiber optic cables are preferred for long-distance and high-performance networking applications.

A visual camera enables the detection and identification of a person’s face. Visual cameras capture detailed images using visible light, which is necessary for facial recognition and identification applications. While radar, passive infrared sensors, and thermal cameras are useful for detecting movement and heat signatures, they do not provide the detailed imagery required for facial identification. This functionality is detailed in Axis Communications' documentation on camera capabilities.

"If the IR-cut filter is stuck or not functioning properly, it can cause a color cast or unnatural tint in the image during daylight, similar to what is shown in the right image."

— Axis Communications Academy, Network Video Fundamentals, 2022

"A stuck IR-cut filter often causes an unnatural magenta or pinkish hue in daylight scenes."

— Axis Technical Note: IR-cut Filter Issues

For outdoor cameras, not using the proper connectors, such as weatherproof or waterproof connectors, can lead to water ingress. This can damage the camera’s internal components, leading to malfunctions or complete failure of the device. Axis outdoor cameras are designed with specific connectors to ensure they are sealed against environmental factors like moisture, dust, and temperature extremes. According to Axis installation guides, ensuring the correct connectors are used is crucial for maintaining the camera's IP rating and long-term reliability.

For covert surveillance, modular cameras are the best choice. These cameras consist of a small sensor unit connected to a main unit by a cable, allowing the sensor unit to be discreetly placed in tight spaces while the main unit is hidden elsewhere. This makes modular cameras ideal for situations where discretion is paramount. Axis Communications offers a range of modular cameras specifically designed for covert applications, as detailed in their product documentation and solutions guides.

Zipstream’s Dynamic GOP (Group of Pictures) conserves bandwidth and storage by skipping new I-frames if the scene is unchanged. I-frames (intra-coded frames) are larger than P-frames (predictive frames) and B-frames (bi-directional frames) because they contain the full image data. By reducing the frequency of I-frames when there is no motion or change in the scene, Zipstream significantly lowers the data rate without compromising image quality. Axis documentation explains how Zipstream’s Dynamic GOP feature optimizes video encoding to conserve resources effectively.

To prevent reflections from built-in IR illuminators from degrading the image quality, an installer can adjust the camera's field of view. By repositioning the camera or slightly altering its angle, the installer can minimize the direct reflection of IR light back into the lens, which often causes glare and reduces image clarity. Axis installation guidelines recommend adjusting the camera’s position to avoid reflective surfaces and ensure optimal use of IR illumination for clear, unobstructed images.

Axis Official Documentation Extract:

“The unique design of the Sharpdome enables an innovative viewing experience, allowing the PTZ camera to see above its own horizon, giving more usable coverage, especially on uneven terrain or in hilly cities. This capability is called Axis Sharpdome technology.”

— Source: AXIS Q61 Series Sharpdome Technology

Supporting Extract from Axis Study Guide:

“Sharpdome technology allows PTZ cameras to deliver sharp images in all directions, and for the first time, the camera can view above the horizon, which is not possible with conventional dome cameras.”

— Axis Communications Academy, Network Video Fundamentals, 2022

An IR cut filter is used to block infrared light during daylight hours to prevent it from interfering with the camera's sensor. This ensures that the colors captured by the camera appear natural. Without an IR cut filter, the infrared light can cause color distortions, resulting in unnatural-looking images. Axis cameras equipped with IR cut filters switch between day and night modes to optimize image quality in various lighting conditions, as explained in their technical documents and user manuals.