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标准名称：	铁路电话交换网 自动电话交换机的信号接口
中标分类：	铁路 >> 铁路通信 >> 铁路通信网
替代情况：	TB 1693-85
发布部门：	中华人民共和国铁道部
发布日期：	1995-06-05
实施日期：	1993-10-01
首发日期：
作废日期：
主管部门：	中华人民共和国铁道部
提出单位：	中国铁道部通信信号总公司研究设计院
归口单位：	中国铁道部通信信号总公司研究设计院
起草单位：	中国铁道部通信信号总公司研究设计院
起草人：	杨锡俊、赵汝梅
出版社：	中国铁道出版社
出版日期：	1993-10-01
页数：	9页

本标准规定了铁路电话交换网自动电话交换机间传送信号时的模拟接口条件。对交换机与长途接续台、记录问询台连接时的信号接口也作了规定。
本标准适用于下述接口点；
a)交换机与传输设备（音频线对、载波终端设备、脉码调制复用设备等）间；
b)交换机与信号转换设备间；
c)信号转换设备与传输设备间；
b）长途接续台、记录问询台与交换机或信号转换设备间；

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Product Code:SAE ARP1256
Title:Procedure for the Continuous Sampling and Measurement of Gaseous Emissions from Aircraft Turbine Engines
Issuing Committee:E-31 Aircraft Exhaust Emissions Measurement Committee
Scope:This SAE Aerospace Recommended Practice (ARP) describes the continuous sampling and analysis of gaseous emissions from aircraft gas turbine engines. The measured gas species include carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), total hydrocarbons (CH驴 where 驴驴驴 is the hydrogen to carbon ratio of the fuel) and water vapor (H2O). This ARP excludes engine operating procedures and test modes, and is not intended for in flight testing, nor does it apply to engines operating in the afterburning mode.It is recognized that there will probably be major advances in the gas analysis measurement technology. It is not the intent of this ARP to exclude other analysis techniques, but to form the basis of the minimum amount of conventional instruments (those in common industry usage over the last fifteen years) required for the analysis of aircraft engine exhaust. It is the responsibility of the analyst to demonstrate the alternative measurement technology has comparable (or better) performance, than the techniques described in this ARP.The measurement of other exhaust gas species is beyond the scope of this ARP. It should be noted the measurement of oxygen (O2) is generally accepted as essential for assessing data quality, but is not covered by this ARP. Sulfur dioxide (SO2) is normally not measured using conventional systems but is calculated from fuel sulfur content. Again this is not covered by this ARP.