The FCC guidelines for human exposure to RF electromagnetic fields are derived from the recommendations of two expert organizations, the National Council on Radiation Protection and Measurements (NCRP) and the Institute of Electrical and Electronics Engineers (IEEE). In both cases, the recommendations were developed by scientific and engineering experts drawn from industry, government, and academia after extensive reviews of the scientific literature related to the biological effects of RF energy.

Many countries in Europe and elsewhere use exposure guidelines developed by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The ICNIRP safety limits are generally similar to those of the NCRP and IEEE, with a few exceptions. For example, ICNIRP recommends different exposure levels in the lower and upper frequency ranges and for localized exposure from certain products such as hand- held wireless telephones. Currently, the World Health Organization is working to provide a framework for international harmonization of RF safety standards.

The NCRP, IEEE, and ICNIRP all have identified a whole-body Specific Absorption Rate (SAR) value of 4 watts per kilogram (4 W/kg) as a threshold level of exposure at which harmful biological effects may occur. Exposure guidelines in terms of field strength, power density and localized SAR were then derived from this threshold value. In addition, the NCRP, IEEE, and ICNIRP guidelines vary depending on the frequency of the RF exposure. This is due to the finding that whole-body human absorption of RF energy varies with the frequency of the RF signal. The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the human body absorbs RF energy most efficiently. For products that only expose part of the body, such as wireless phones, exposure limits in terms of SAR only are specified.

The exposure limits used by the FCC are expressed in terms of SAR, electric and magnetic field strength, and power density for transmitters operating at frequencies from 300 kHz to 100 GHz. The specific values can be found in two FCC bulletins, OET Bulletins 56 and 65: http://www.fcc.gov/oet/info/documents/bulletins/#56;

http://www.fcc.gov/oet/info/documents/bulletins/#65

Section 4: Safety Guidelines and Warranty Information

228 4A: Safety

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Hitachi SH-G1000 manual 228 4A Safety
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SH-G1000 specifications

The Hitachi SH-G1000 is a cutting-edge digital signage solution designed to meet the demands of modern advertising and information dissemination. This versatile display unit is particularly noted for its vibrant image quality and intuitive features, making it an ideal choice for retail environments, corporate settings, and event venues.

One of the standout features of the SH-G1000 is its ultra-high-definition (UHD) 4K resolution, which ensures that every image is crisp and detailed. This high resolution allows for stunning visuals that can capture the attention of passersby and effectively convey messages, whether for promotional content or informational displays. The display also boasts a wide color gamut, enabling it to produce vivid colors that enhance the viewer's experience and engagement.

In terms of technology, the SH-G1000 incorporates advanced LED backlighting, which improves brightness and contrast, further elevating the quality of the displayed content. This technology also contributes to energy efficiency, allowing businesses to operate their digital signage without incurring excessive power costs.

The SH-G1000 features an integrated media player, which streamlines the deployment of content. This built-in feature negates the need for additional hardware, simplifying the installation process and reducing overall costs. Users can easily manage and schedule content through a user-friendly interface, ensuring that the right message is delivered at the right time.

Connectivity is another crucial aspect of the SH-G1000. It comes equipped with multiple input options, including HDMI, USB, and DisplayPort, allowing for seamless integration with various devices. This connectivity flexibility ensures that businesses can adapt the signage to their specific needs, whether updating content frequently or utilizing remote management capabilities.

Furthermore, the SH-G1000 is designed with durability in mind. Its robust construction allows it to withstand the rigors of daily use, making it suitable for high-traffic areas. With features that support both portrait and landscape orientations, this display can adapt to various environments and marketing strategies.

In summary, the Hitachi SH-G1000 is a state-of-the-art digital signage solution that excels in image quality, ease of use, and connectivity. Its combination of advanced technologies and practical features makes it an excellent investment for any organization looking to enhance their communication strategy through visually striking displays. Whether for advertising, education, or information sharing, the SH-G1000 is equipped to handle the challenge with outstanding performance.
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