What is the meaning of campus radio

Release time:

2022-06-10

Summary： The most common is wired constant voltage audio twisted pair transmission: its advantages are cheap terminal and simple structure; The disadvantage is that each classroom needs wiring, and the system is configured in strict accordance with the principles of power matching and impedance matching. The expansion capacity is poor, stereo broadcasting cannot be realized, the program capacity is small (only one set of programs can be transmitted), and different contents cannot be broadcast at the same time according to grade.

The existing common campus broadcast transmission methods are: audio cable constant pressure (fixed resistance) transmission, wireless FM transmission, cable FM transmission three ways.

① The most common is wired constant voltage audio twisted pair transmission: its advantages are cheap terminal and simple structure; The disadvantage is that each classroom needs wiring. The system is configured strictly according to the principles of power matching and impedance matching. The expansion capacity is poor, stereo broadcasting cannot be realized, the program capacity is small (only one set of programs can be transmitted), and different contents cannot be broadcast at the same time according to grade.

② Wireless FM transmission mode: its advantages are simple construction, no wiring, low price, can achieve multi-channel simultaneous broadcasting; the disadvantage is the need to occupy space frequency resources, in principle, need to be approved by the radio management department frequency, vulnerable to external interference, reliability Relatively poor.

③ Cable coaxial common cable FM transmission mode: Cable FM is based on cable TV coaxial common cable frequency division multiplexing technology transmission mode work, its advantage is to achieve multi-channel simultaneous transmission (WK series can achieve 100 channels of reception), scalability, terminal speakers as long as the reception level can be met, not limited by the number and power. Cable TV technology in China has experienced nearly 20 years of development history, has been fully mature, supporting products low prices, stable performance. Cable FM broadcasting can be transmitted together with closed-circuit VOD, dual-control and closed-circuit television. No wiring is required, the construction is simple, the number of transmitted programs can be expanded, and the addressable control function of intelligent broadcasting can be realized. The disadvantage is that the cable FM transmission mode is based on weak signal transmission. The FM sound box needs an additional 220V AC power supply, but at present each school classroom can provide a stable 220V AC power supply.

Based on the above technologies, general schools should choose cable FM transmission mode, cable FM broadcasting has strong expansibility, high performance-price ratio, and can be combined with closed-circuit dual control, VOD on-demand teaching, campus multimedia and other "multi-network integration".

What direction will campus radio develop in the future?

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With the acceleration of the process of education informatization and the comprehensive construction of the school-to-school connection project, campus broadcasting will develop in the direction of "digitization, networking, and intelligence" in the future, and finally "multi-network integration" with campus multimedia and campus network ". From the current situation of campus information construction, most schools have or are building a coaxial network-based interactive closed-circuit dual-control system and a computer campus network system based on the super-five digital LAN architecture. The former has a bandwidth of 1-1000MHz, and the latter has a bandwidth of 1-100MHz. Obviously, the former has obvious bandwidth advantages, and as the CabModem technology matures, it will be compatible with all the functions of the latter.

Shijiazhuang Bell Electronic Technology Co., Ltd. was established by Bell (International) Electronics Co., Ltd. to better adapt to and operate the Hebei regional market in mainland China. It is mainly aimed at large theaters, stadiums (stadiums), cultural and sports (cultural and artistic) centers, sound reinforcement and lighting equipment, campus broadcasting system, stage machinery curtain system, stage lighting system, conference system, queuing management system, acoustic design, and computer network system integration, remote video provide design and installation of conferences, security monitoring systems and other engineering projects, sales and technical services, for Hebei, for the whole country. It is a member unit of China Performing Arts Materials Association. At the same time operating public broadcasting, professional stage sound lighting equipment and auxiliary equipment and other products. Always take "integrity, rigorous, pragmatic, innovative," as the corporate philosophy, adhere to the "quality-centered, market-oriented", and try our best to provide customers with satisfactory quality projects and quality services.

Shijiazhuang Bell Electronic Technology Co., Ltd. is willing to make common progress through cooperation with you and make efforts for the development of China's cultural and economic undertakings; our company has a large number of management talents for many years, and the business backbone has provided a strong guarantee for the company's development; Professional and stable financial workers are the solid backing of the company and the guarantee of corporate reputation; a group of stable and standardized technical teams, has a wealth of installation and commissioning, technical support, agent maintenance experience is the main source of long-term customer trust us. Product quality control, scientific after-sales service process, to provide customers with creative reengineering program. Shijiazhuang Bell Electronic Technology Co., Ltd. strives to establish a new era of industry standards with our efforts through rich experience, honest corporate quality, innovative entrepreneurial spirit, rigorous and pragmatic corporate style.

Key words:

Multi-function hall audio installation guide

Sound related small knowledge

Multi-function hall audio installation guide

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Sound related small knowledge