WiMAX & Fiber IP Broadband Backhaul for HD ENG

JVC Professional

APRIL 2007

NAB-2007

The ProHD Report

WiMAX & Fiber IP –

Broadband Backhaul for HD ENG

WiMAX wireless broadband is (almost) here

WiMAX is a new wireless digital communications system intended for wireless "metropolitan area networks" (MAN). Theoretically, WiMAX can provide broadband wireless access (BWA) up to 30 miles for fixed stations, and 3 - 10 miles for mobile stations. In contrast, the older WiFi/802.11 wireless local area network standard is limited in most cases to only 100 - 300 feet. WiMAX operates on both licensed and non-licensed frequencies, providing a regulated environment.

WiMAX is a second-generation protocol that allows for more efficient bandwidth use, interference avoidance, and is intended to allow higher data rates over longer distances. WiMAX is expected to be a very well recognized term to describe wireless Internet access throughout the world in the near future. However, much of the talk remains about one way delivery services to consumers (IPTV, mobile video etc.) although it is a fully two-way system.

But, as we can easily recognize, the powerful microwave WiMAX transmitter at the base station may reach for up to 30 miles, a small powerless transmitter in your laptop may only reach part of the way back to the fixed station. Thus, practical implementations may offer a bidirectional reach of one to several miles. A stationary ENG Van may have no problem in connecting upstream, while a moving ENG Van may be more challenging.

Frequency bands are available in the 10-66GHz range for licensed users, while the unlicensed users are delegated to selected areas within the 2-11GHz spectrum. Between Base Stations and fixed users (i.e. homes), the connectivity is

the most robust as there are no moving target variables. Between Base Stations and mobile users, the range is severely limited.

WiMAX offers a theoretical bandwidth of maximum 75Mbps. This bandwidth may be achieved using 64QAM 3/4 modulation, but only under optimal transmission conditions. WiMAX supports a wide range of modulation schemes to enable the maximum bandwidth under any specific condition.

WiMAX offers a theoretical maximum range of 30 miles with a direct line of sight. Near-line-of-sight (NLOS) seriously limits the range. In addition, some of the frequencies utilized by WiMAX are subject to rainfade interference. The unlicensed WiMAX frequencies are subject to RF interference from competing technologies and competing WiMAX networks.

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NAB-2007 specifications

The JVC NAB-2007 is a notable entry in the world of professional broadcasting and production equipment, showcased by JVC at the National Association of Broadcasters (NAB) Show in 2007. This camcorder was designed to meet the demanding needs of videographers and broadcasters, emphasizing high-definition video quality and advanced technology.

One of the standout features of the JVC NAB-2007 is its ability to capture high-definition video in various formats. It supports both 720p and 1080i resolutions, allowing users to choose the format that best fits their production needs. This flexibility has made it a popular choice among filmmakers, event videographers, and news organizations looking for quality in their content creation.

The camcorder utilizes JVC’s advanced HD CMOS technology, which enhances image quality by providing better low-light performance and reducing noise. This is coupled with a powerful optical zoom lens that enables users to capture detailed shots from a distance, making it ideal for dynamic shoots where proximity to the subject may be limited.

Another key feature of the JVC NAB-2007 is its ergonomic design, which is crafted for ease of use during extended shooting sessions. The camera is lightweight yet robust, providing operators with comfort and stability. Additionally, the user interface is intuitive, allowing for quick adjustments to settings without disrupting the workflow.

Built-in stabilization features further enhance the usability of the JVC NAB-2007, ensuring that footage remains smooth even during handheld operation. This is particularly advantageous for documentary shoots or on-the-go filming where traditional stabilization rigs may be impractical.

Connectivity options are expansive on the JVC NAB-2007, including HDMI and component outputs, enabling seamless integration with various editing systems and broadcast environments. The camcorder also includes features for live broadcasting, making it versatile for both recorded and real-time production scenarios.

In summary, the JVC NAB-2007 encapsulates a blend of impressive features, cutting-edge technology, and user-centric design, making it a suitable choice for professionals in the broadcasting and film industries seeking reliable and high-quality performance in their equipment.