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请教下最新的无线对讲机报价多高

浏览：51次 | 提问时间： 06-26 08:30
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5个答案
人各有志我不强求 06-26 08:31

现在市面上一般都是0元左右的，质量好一点的，价格相对会比较贵一点的，性价比不同价格也是相对比较不同的，还有牌子也是相对比较重要的，主要还是看自己的选择接收部分将来自射频的放大信号与来自锁相环频率合成器电路的第一本振信号在第一混频器处混频并生成第一中频信号。第一中频信号通过晶体滤波器进一步消除邻道的杂波信号。滤波后的第一中频信号进入中频处理芯片，与第二本振信号再次混频生成第二中频信号，第二中频信号通过一个陶瓷滤波器滤除无用杂散信号后，被放大和鉴频，产生音频信号。音频信号通过放大、带通滤波器、去加重等电路，进入音量控制电路和功率放大器放大，驱动扬声器，得到人们所需的信息。

星星的軌跡 06-26 08:39

对讲机的工作原理如下：1、发射部分：锁相环和压控振荡器(VCO)产生发射的射频载波信号，经过缓冲放大，激励放大、功放，产生额定的射频功率，经过天线低通滤波器，抑制谐波成分，然后通过天线发射出去。2、接收部分：接收部分将来自射频的放大信号与来自锁相环频率合成器电路的第一本振信号在第一混频器处混频并生成第一中频信号。第一中频信号通过晶体滤波器进一步消除邻道的杂波信号。滤波后的第一中频信号进入中频处理芯片，与第二本振信号再次混频生成第二中频信号，第二中频信号通过一个陶瓷滤波器滤除无用杂散信号后，被放大和鉴频，产生音频信号。音频信号通过放大、带通滤波器、去加重等电路，进入音量控制电路和功率放大器放大，驱动扬声器，得到人们所需的信息。3、调制信号及调制电路：人的话音通过麦克风转换成音频的电信号4、信令处理：CPU产生CTCSS/CDCSS信号经过放大调整，进入压控振荡器进行调制。接收鉴频后得到的低频信号，一部分经过放大和亚音频的带通滤波器进行滤波整形，进入CPU，与预设值进行比较，将其结果控制音频功放和扬声器的输出。即如果与预置值相同，则打开扬声器，若不同，则关闭扬声器。

星星的軌跡 06-26 08:48

400左右。无线电对讲机既是移动通信中的一种专业无线通信工具，又是一种能满足人们生活需要的具有消费类产品特点的消费工具。顾名思义移动通信就是通信一方和另一方在移动中实现通信。它包括移动用户对移动用户、移动用户对固定用户、当然又包括固定用户对固定用户之间进行通信联系，无线电对讲机就是移动通信中的一个重要分支。

深爱成无奈 06-26 08:56

产品名称：Motorola/摩托罗拉 SMP V对讲机品牌: Motorola/摩托罗拉型号: SMP V8货号: SMP V8颜色分类: 黑色对讲机类别: 手台最大通话距离:km(含10km)有无显示屏: 无您好，此款对讲机的价格是320元

心乱如麻 06-26 09:05

价格大概00之间，我看了一下，智物通蛮好的，对讲机声音的清晰与否和实际使用环境、功率大小有关系。 数字对讲机声音就好比手机声音一样清晰。

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