外文翻譯--無(wú)線收發(fā)模塊-其他專業(yè)-閱讀頁(yè)
2025-02-08 10:12本頁(yè)面
【正文】 ch normal work. Data DFlevel data should be close to the actual operating voltage modules in order to obtain the effect of higher modulation. DF preferably vertical launch modules mounted on the edge of the motherboard should be left around the device more than 5mm to the impact from the distribution of parameters. DF module transmission distance and signal frequency and amplitude modulation, firing voltage and battery capacity, transmitting antenna, receiver sensitivity, send and receive environment. Generally the largest launch in the open distance of about 800 meters, there are obstacles in the circumstances, the distance will be shortened, due to radio signal transmission in the process of refraction and reflection will form a number of death and instability in the region, different transceiver environment will have different from the transceiver. This is the users must pay attention to, and the author of such modules in the use of application, there had been such a situation, where he was introduced to everyone, hope that they will be applied in this regard to a certain Kai User reference: We Card Room for the design of a wireless call system, uses the 1500 meters of the launch module (many manufacturers are making the same logo, or when the actual use of specific test environment.) This module of our Department in an open have experimented with in the 500 meters to the normal reception, but the use of here, away from the room after 5 can not receive, the actual distance of about 30 meters or so, the environment as follows: floor height of meters, all the launch devices are installed in a closed box package. In order to achieve reliable function call, we increased the levels for signal amplification repeater after the realization of functions and the repeater are talking about here is our web site to introduce highpower wireless signal repeater. The above examples illustrate, the wireless device to send and receive a straight line better transmission performance, and performance will greatly reduce the diffraction. Wireless Receiver Module 1 super renewable detector receiver Super Renewable detector circuit is actually a by intermittent oscillation control of highfrequency oscillator, the highfrequency oscillator using threepoint capacitance oscillator, oscillation frequency and the transmitter frequency of the firing line. And intermittent oscillation is the oscillation in the highfrequency oscillations generated by the process, which in turn controls the highfrequency oscillator and intermittent oscillations. And intermittent oscillation frequency is determined by the parameters of the circuit (usually a hundred to a few hundred kHz). The low frequency of elections, and better antiinterference performance of the circuit, but the lower receiver sensitivity, on the contrary, the high frequency of elections, a better receiver sensitivity, but the antiinterference performance variation. Renewable detection circuit has high gain, in the absence of control signals received, due to spurious signals from outside interference and disturbance of thermal circuit itself, produce a unique noise, called ultranoise, the noise frequency range for between ~ 5kHz, sounds like a waterlike whisper sound. In the absence of signals, ultrahighlevel noise, amplified by the filter output noise voltag
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