ITU-R QUESTION 69-1/6-2004
存在反射信号的情况下提供令人满意的电视业务所需的条件

Conditions for a satisfactory television service in the presence of reflected signals

ITU-R QUESTION 69-1/6-2004 发布历史

The ITU Radiocommunication Assembly considering a) that reflected signals can be generated by re-radiating structures such as tall buildings or tall antenna structures; b) that receiving antenna directivity is sometimes ineffective in eliminating reflected signals; c) that reflected signals can be also generated on cable distribution systems and collective antenna systems; d) that reflected signals can impair the received television picture and can also adversely affect reception of additional broadcasting services; e) that it is possible to cancel reflected signals by means of automatic circuits in the receiver; f) that reflected signals may have a different effect on analogue and digital television signals, g) that reflected signals may have different effects depending on different digital modulation systems.

ITU-R QUESTION 69-1/6-2004由国际电信联盟 IX-ITU 发布于 2004-01-01。

ITU-R QUESTION 69-1/6-2004 在中国标准分类中归属于: M60 广播、电视网综合。

ITU-R QUESTION 69-1/6-2004的历代版本如下：

• 2004年01月01日 ITU-R QUESTION 69-1/6-2004 存在反射信号的情况下提供令人满意的电视业务所需的条件

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 ITU-R QUESTION 69-1/6-2004 前三页，或者稍后再访问。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

ITU-R QUESTION 69-1/6-2004

发布日期

2004年01月01日

实施日期

废止日期

无

中国标准分类号

M60

发布单位

IX-ITU

适用范围

The ITU Radiocommunication Assembly considering a) that reflected signals can be generated by re-radiating structures such as tall buildings or tall antenna structures; b) that receiving antenna directivity is sometimes ineffective in eliminating reflected signals; c) that reflected signals can be also generated on cable distribution systems and collective antenna systems; d) that reflected signals can impair the received television picture and can also adversely affect reception of additional broadcasting services; e) that it is possible to cancel reflected signals by means of automatic circuits in the receiver; f) that reflected signals may have a different effect on analogue and digital television signals, g) that reflected signals may have different effects depending on different digital modulation systems.