M90 通信、广播设备生产机械综合 标准查询与下载

KS B ISO 11204:2007 声学.机器和设备发射的噪声.工作场所与其他指定位置测量噪音声压级.环境修正指数要求法

이 규격은 작업장이나 다른 지정된 장소 근처에서 확실한 자격 요구조건을 갖춘 모든 환경에서

Acoustics-Noise emitted by machinery and equipment-Measurement of emission sound pressure levels at a work station and at other specified positions-Method requiring environmental corrections

KS B ISO 11205:2007 声学.机械和设备发射的噪声.决定工作场所与使用声强的其他指定场所噪音声压级的工学方法

이 규격은 소리 강도를 사용하는 다른 지정된 위치 또는 작업장에서 정위치 기계의 방사 음압

Acoustics－Noise emitted by machinery and equipment－Engineering method for the determination of emission sound pressure levels in situ at the work station and at other specified positions using sound intensity

ITU-R REPORT M.741-3-1990 用于调度业务的多渠道陆地移动系统(包括或不包括公用电话交换网互连)

Radio spectrum allocated for dispatch traffic is becoming increasingly congested and already many users (networks) have to share a channel with several other users. This practice employs the channel more effectively but gives the participands a reduced "grade of service" in the sense that they may often have to wait for some time for a channel to become free and they suffer from reduced privacy.

Multi-channel land mobile systems for dispatch traffic (with or without PSTN interconnection)

ITU-R REPORT M.1025-1-1990 无绳电话的技术和操作特征

The major characteristics of some cordless telephone systems are given in Part B of this Report together with a brief description and other aspects of system operation.

Technical and operating characteristics of cordless telephones

ITU-R REPORT M.778-2-1990 为听障人士设计的无线通信系统

Many forms of hearing impairment cannot be satisfactority improved by the provision of amplification only. Difficulties such as distortion in the residual hearing, loss of binaural directivity, emphasis of environmental noise and room reverberation lead to the use of systems incorporating the placement of the microphone near to the speaker rather than to the listener.

Wireless communication systems for persons with impaired hearing

ITU-R REPORT M.739-1-1986 介于25至100 MHz之间的地面移动通信业务中的互调产物产生的干扰

Some cases occur with varying probablity and varying severity. They may be reduced by equipment design or careful choice of channels, but solutions of the latter type to one case of intermodulation may increase another.

Interference due to intermodulation products in the land mobile service between 25 and 100 MHz

ITU-R REPORT M.588-1-1978 海上移动通信业务和海事卫星移动业务中透过结合金属及射频电路的黑白传真传输

Iterest in maritime public correspondence facsimile continues to be small, although there are indications that it will develop in the future. It is therefore desirable that the preferred characteristics of a system are identified.

Black and white facsimile transmissions over combined metallic and radio circuits in the maritime mobile service and in the maritime mobile-satellite service

SJ/T 10521-1994 录像机生产线质量控制指南

本标准提出了VHS录像机生产线在产品制造过程中质量控制应遵循的原则和指南，以保征和提高产品质量。 本标准适用于VHS录像机生产线的质量管理和控制。

Guideline for quality control for producting line of video tape recorders