ITU-R M 1175-1995 Automatic Receiving Equipment for Radiotelegraph and Radiotelephone Alarm Signals《无线电话和无线电话告警信号的自动接收设备》.pdf
《ITU-R M 1175-1995 Automatic Receiving Equipment for Radiotelegraph and Radiotelephone Alarm Signals《无线电话和无线电话告警信号的自动接收设备》.pdf》由会员分享,可在线阅读,更多相关《ITU-R M 1175-1995 Automatic Receiving Equipment for Radiotelegraph and Radiotelephone Alarm Signals《无线电话和无线电话告警信号的自动接收设备》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、RW. ITU-R M.1175 215 RECOMMENDATION ITU-R M. 1 175* AUTOMATIC RECEIVING EQUIPMENT FOR RADIOTELEGRAPH AND RADIOTELEPHONE ALARM SIGNALS (1995) The ITU Radiocommunication Assembly, considering that there is a need to describe the automatic receiving equipment for radiotelegraph and radiotelephone alarm
2、 a) signals, recommends that automatic receiving equipment for radiotelegraph and radiotelephone alarm signals should fulfil the 1 conditions contained in Annex 1. ANNEX 1 Automatic receiving equipment for radiotelegraph and radiotelephone alarm signais 1 Automatic devices intended for the reception
3、 of the radiotelegraph alarm signal shall fulfil the following the equipment shall respond to the alarm signal transmitted by the telegraphic emissions of at least class A2B and H2B (see RR No. S52.18 No, 4216); the equipment shall respond to the alarm signal through interference (provided it is not
4、 continuous) caused by atmospherics and powerful signals other than the alarm signal, preferably without any manual adjustment being required during any period of watch maintained by the apparatus; the equipment shall not be actuated by atmospherics or by strong signals other than the alarm signal;
5、the equipment shall possess a minimum sensitivity such that with negligible atmospheric interference, it is capable of being operated by the alarm signal transmitted by the emergency transmitter of a ship station at any distance from this station up to the normal range fixed for this transmitter by
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