M04;M30 标准查询与下载
共找到 10 条与 相关的标准，共 1 页
系统传播特性GB/T14617的本部分规定了电路设计中常用的有关参数的计算，如余隙和费涅耳半径的计算、气体吸收和雨衰减的计算、电波折射、分集妾收、模拟微波衰落概率和数字微波电路中断率的预测、与传播特性有关的无线电气象数据等，且同时给出了其中各参数的适用范围a 本部分适用于各种容量的视距微波妾力通信系统的总体设计和各个频段的视距微波接力通信电路设计以及与电波传潘特性有关的各种电磁兼容系统设计。
Propagation characteristics in land mobile service and fixed service.Part 3:Propagation characteristics of line-of-sight radio-relay communications systems
- ICS
- 33.060.60
- CCS
- M04;M30
- 发布
- 2012-12-31
- 实施
- 2013-06-01
本部分规定了振荡、信号和相关器件的术语和定义。 本部分适用于电信技术领域。
Terminology for telecommunication.Oscillations,signals and related devices
- ICS
- 33.120.01
- CCS
- M04;M30
- 发布
- 2008-08-06
- 实施
- 2009-03-01
本部分规定了无线电波传播的术语和定义。 本部分适用于电信技术领域。
Terminology for telecommunication.Radio wave propagation
- ICS
- 33.060.01
- CCS
- M04;M30
- 发布
- 2008-08-06
- 实施
- 2009-03-01
This technical specification introduces safeguards to reduce the likelihood of flame spread that could lead to room flash-over as a result of accidental ignition of exterior housings of audio/video and information communication technology products, likely to be used in the home, caused by a simulated candle flame.
Accidentally caused candle flame ignition for audio/video, communication and information technology equipment
- ICS
- 13.220.40;33.020;35.020;35.260
- CCS
- M04;M30
- 发布
- 2006-12
- 实施
Test images have played an important role throughout the development of Group 3 and Group 4 facsimile. This Recommendation has been prepared with the goal of providing a standard set of images1 to facsimile experimenters. The set includes images that have been used over the years plus new images that are applicable for gray scale and color. The standard set of images will provide a consistent baseline for further work; for example, results of compression algorithm experiments and image quality tests can be compared by a broad range of users, knowing that the input image data is identical. The set of images, stored on a Compact Disk Read Only Memory (CD-ROM), is available from the ITU.
Standardized Digitized Image Set
- ICS
- CCS
- M04;M30
- 发布
- 1998-06-01
- 实施
Test images have played an important role throughout the development of Group 3 and Group 4 facsimile. This Recommendation has been prepared with the goal of providing a standard set of images1 to facsimile experimenters. The set includes images that have been used over the years plus new images that are applicable for gray scale and color. The standard set of images will provide a consistent baseline for further work; for example, results of compression algorithm experiments and image quality tests can be compared by a broad range of users, knowing that the input image data is identical. The set of images, stored on a Compact Disk Read Only Memory (CD-ROM), is available from the ITU.
Standardized Digitized Image Set
- ICS
- CCS
- M04;M30
- 发布
- 1998-06-01
- 实施
The ITU-T, considering that a standardized colour test chart to check the quality of document facsimile transmissions will have great advantages. The advancing technology of document facsimile has brought forth colour testing requirements that cannot be adequately met with current test charts. New higher resolution needs and transmission of high quality colour imagery must be taken into consideration.
STANDARDIZED COLOUR TEST CHART FOR DOCUMENT FACSIMILE TRANSMISSIONS
- ICS
- CCS
- M04;M30
- 发布
- 1994-04-01
- 实施
The ITU-T, considering that a standardized colour test chart to check the quality of document facsimile transmissions will have great advantages. The advancing technology of document facsimile has brought forth colour testing requirements that cannot be adequately met with current test charts. New higher resolution needs and transmission of high quality colour imagery must be taken into consideration.
STANDARDIZED COLOUR TEST CHART FOR DOCUMENT FACSIMILE TRANSMISSIONS
- ICS
- CCS
- M04;M30
- 发布
- 1994-04-01
- 实施
The ITU-T, considering that a standardized test chart to check the quality of document facsimile transmissions will have great advantages. The advancing technology of document facsimile has brought forth monochrome testing requirements that cannot be adequately met with current test charts. New higher resolution needs and transmission of high quality continuous tone gray scale must be taken into consideration.
STANDARDIZED TEST CHARTS FOR DOCUMENT FACSIMILE TRANSMISSIONS
- ICS
- CCS
- M04;M30
- 发布
- 1993-03-01
- 实施
The ITU-T, considering that a standardized test chart to check the quality of document facsimile transmissions will have great advantages. The advancing technology of document facsimile has brought forth monochrome testing requirements that cannot be adequately met with current test charts. New higher resolution needs and transmission of high quality continuous tone gray scale must be taken into consideration.
STANDARDIZED TEST CHARTS FOR DOCUMENT FACSIMILE TRANSMISSIONS
- ICS
- CCS
- M04;M30
- 发布
- 1993-03-01
- 实施
