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一、主要性能ICF-2001 主要参数如下表所示。外形尺寸:288mm×159mm×52mm 重量:1.7kg 电源:接收部分为3节1号干电池,微处理器为2节5号干电池,外接电源为额定4.5V。二、整机电路整机电路方框图图如图1所示。 (一)信号输入部分中长波信号(LW/MW)经磁性天线感应后,由高频放大器放大,进入AM放大。短波信号(SW)经拉杆天线感应后,也进入 AM放大。上述信号进入第一混频转换成 55.845MHz的第一中频频率,经第二混频转换成 455kHz的第二中频频率,送至AM检波。根据不同的需要,AM信号分别进行包络检波、同步检波、SSB检波,转换成音频信号。
First, the main performance ICF-2001 main parameters as shown in the following table. Dimensions: 288mm × 159mm × 52mm Weight: 1.7kg Power: The receiving part of the three batteries on the 1st, the microprocessor for the two batteries on the 5th, the external power supply is rated 4.5V. Second, the whole circuit diagram of the whole circuit block diagram shown in Figure 1. (A) signal input part of the long wave signal (LW / MW) by the magnetic antenna, amplified by the high-frequency amplifier, into the AM amplification. Shortwave signal (SW) by the rod antenna sensing, but also into the AM amplification. The signal into the first mixer 55.845MHz converted to the first IF frequency, the second mixer 455kHz converted to the second IF frequency, sent to the AM detector. According to different needs, AM signal envelope detection, synchronous detection, SSB detection, converted into audio signals.