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对讲机


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对讲机时保安部重要的通讯工具

发布日期:2018-12-06 00:00 来源:http://pcckw.com 点击:

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大连对讲机接收机抗拒与有用信号频率有特定关系的两个无用输入信号,因互调在接收机输出端造成干扰的能力。使高出参考灵敏度3dB的有用信号产生的信噪比降回原标准信噪比的两个等电平的无用输入信号电平与参考灵敏度之比。其无用信号的频率各标准有不同规定。接收机抗拒除邻频道信号外的其它杂散信号干扰的能力。


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大连对讲机


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