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应用省邮电科研所研制的2GHz数字微波通信设备,已在巴县建成一条微波中继电路,并于1984年6月18日完成调试工作正式投入试用。巴县微波中继电路包括两个终端站和一个无人值守低功耗微波中继站,系统终端采用邮电部重庆通信设备厂生产的PCM32路数字电话端机,提供30条话路。对全系统进行了自动和磁石电话中继试验,拨号准确、话音清晰,完全符合通话标准。本微波系统采用1:1备用方式。为了便于维护,微波终端机分别安装在巴县邮电局和白市驿支局通信机房内。中继站设在中梁山宝积寺山头,中继站塔高10米,塔上安装2面3.2米抛物面天线。中继机整机功耗实测值1.8瓦,采用20瓦太阳能电池和135安时蓄电池供电,解决了该山头无市电问题,完全实现了中继站无人值守。由于采用无人值守方式,大大降低了微波中继站的建设投资,该中继站的全部建设投资决算约为6.5万元(见附录)。
Application Provincial Institute of Posts and Telecommunications developed 2GHz digital microwave communications equipment, has built a microwave relay circuit in Baxian, and in June 18, 1984 completed the commissioning work formally put into trial. Baxian microwave relay circuit includes two terminal stations and an unmanned low-power microwave relay station. The system terminal adopts PCM32 digital telephone terminal produced by Chongqing Telecommunication Equipment Factory of the Ministry of Posts and Telecommunications to provide 30 telephone channels. The system-wide automatic and magnet telephone relay test, dial-up accurate, clear voice, in full compliance with call standards. The microwave system uses a 1: 1 backup method. In order to facilitate the maintenance, microwave terminals were installed in Baxian Post Office and Baishi Post Branch Communication Room. The relay station is located in the mountains of Baoji Temple in Zhongliang Mountain. The tower of the relay station is 10 meters high. There are two 3.2-meter parabolic antennas installed on the tower. The total power consumption of the relay machine is 1.8 watts, which is powered by a 20-watt solar cell and a 135-am battery, which solves the problem of no electricity on the hill and fully achieves unattended relay stations. As a result of unattended mode, greatly reducing the investment in the construction of microwave relay stations, the relay station total construction investment is about 65,000 yuan (see Appendix).