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本机发射功率最高可达2 W,接收灵敏度优于1μV/m,其性能可与某些商品对讲机媲美,而电路却简单,价格也便宜得多。除可用于现代家庭日常生活和某些必须场所的随时联络外,尚可代人值守——自动控制录音机录下来电内容,而一般市售对讲机并不具备这一功能。本机工作方式为单工调幅、收发同频式,开阔地处通讯半径不小于4 km。本机印制板的布局合理,各部分电路的布局示意见图1。其中,1为发射机的载频部分,2为音频调制部分,3为接收机,4为录音自控开关,各区块界
The transmitter power up to 2 W, receiver sensitivity better than 1μV / m, its performance comparable with some commercial walkie-talkie, but the circuit is simple, the price is much cheaper. In addition to being ready for day-to-day living in modern homes and ready-to-go venues, you can keep people on duty - recording the caller’s content automatically - not normally available on commercial walkie-talkies. The working mode is simplex amplitude modulation, sending and receiving the same frequency, open communication radius of not less than 4 km. Local PCB layout is reasonable, the layout of the various parts of the circuit shown in Figure 1. Among them, 1 is the carrier frequency part of the transmitter, 2 is the audio frequency modulation part, 3 is the receiver, 4 is the recording automatic control switch, each block boundary