[FOCUS VISION] Knowledge Class: Comprehensive Insights into Security Monitoring Solutions

As we celebrate the holiday season and reflect on an extraordinary year, FOCUS VISION sends its warmest wishes for a joyful and prosperous New Year! May this festive season bring you renewed hope, new opportunities, and growth. We remain committed to excellence in security and monitoring solutions and look forward to continuing our journey together. Here's to enhancing our collaboration and understanding in the ever-evolving world of technology. Cheers to a successful and innovative year ahead! Happy Holidays!

Knowledge Class

How to choose the millimeter of camera lens?

The required distance for irradiation is typically halved and then divided by 1000 to determine the approximate lens size in millimeters. Based on the desired shooting angle, adjustments can be made to this measurement. Specifically, as the shooting angle increases, the size of the lens required decreases.

What is the source of the moiré interference in elevator images and how does it form an interference loop?

1、The elevator's accompanying cable exhibits suboptimal contact quality.

2、While the elevator is in operation, significant electrical interference is present within the elevator shaft.

How do you explain that installing an analog lens on a network camera can also display images?

Analog lenses are compatible with network cameras; however, they may result in decreased clarity. They can be utilized effectively if the image quality requirements are not stringent.

Can a VGA matrix replace a decoder? If not, what are the specific differences?

The VGA matrix cannot serve as a substitute for a decoder, as it solely facilitates the switching of VGA signals to a large screen without incorporating network decoding capabilities. In contrast, a decoder not only offers network decoding functions but also includes the switching functionality provided by a VGA matrix.

How to achieve wireless transmission when there are many walls?

Wireless devices are unable to effectively penetrate multiple walls. Therefore, wireless transmission is not recommended in environments with a high number of walls.

Are two million and three million considered the same storage space?

Theoretically, there are notable differences; specifically, 300W requires 50% more storage space compared to 200W. Additionally, the pixel bitrate in IPC can be adjusted. In situations where storage space is limited, both 300W and 200W can reduce the bitrate as needed.

Can the network speed dome be controlled by an analog keyboard?

Control is not possible, as the simulated keyboard lacks decoding functionality.

How to turn off the infrared light of the infrared bullet camera?

1.Increase the light intensity

2. Disassemble the camera and disconnect the photoresistor (not recommended)

3. The network camera can turn off the infrared light in the settings

How to connect the pickup?

The majority of microphones available in the market typically feature three wires: a power line (+, usually red), an audio line (+, typically white), and a common ground (G, generally black). The power line (+) should be connected to the positive terminal of the power supply, while the audio line (+) is to be linked to the audio input (AUDIO IN) of the camera. The common ground (G) should be connected to the negative terminal of the power supply and the ground (G) of the audio input.

What are the consequences of reducing the camera frame rate to save hard disk?

It is generally inadvisable to conserve hard disk space by reducing the frame rate. Lowering the frame rate can lead to frame skipping during video playback, which compromises the integrity of video evidence collection during critical moments.

Conclusion and Commitment

At FOCUS VISION, we take great pride in our reputation as a trusted provider of security solutions. This session marks the conclusion of our knowledge series, and we cordially invite you to explore our comprehensive product information. We encourage you to engage with our professional team, who are prepared to address any inquiries you may have. During the New Year holidays, we are pleased to offer a variety of promotional products, and we look forward to your participation. We wish you a joyful holiday season and a prosperous 2025.