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examine

  • Essentials+of+Radio+Wave+Propagation

    The objective of this book is to allow the reader to predict the received signal power produced by a particular radio transmitter. The first two chapters examine propagation in free space for point-to-point and point-to-area transmission, respectively. This is combined with a dis- cussion regarding the characteristics of antennas for various purposes. In chapter 3, the effect of obstacles, whether buildings or mountains, is discussed and analytical methods, whereby the strength of a signal is the shadow of an obstacle can be predicted, are presented. 

    標簽: Propagation Essentials Radio Wave of

    上傳時間: 2020-05-27

    上傳用戶:shancjb

  • spi協議英文詳解

    In this presentation, we will look at what the Serial Peripheral Interface, otherwise known as the SPI, is. and how it is used to communicate data to and from the PICmicro microcontroller.SPl is frequently used when few 1/O lines are available, but communication between two or more devices must be fast and easy to implement.In this presentation, we will discuss the following topics: We will first cover an Overview of SPI This section of the tutorial will introduce you to SPI and its concepts.Next, we will examine the use of SPI on the PICmicro MCU.The details of how SPI is implemented on a PICmicro device will be examined.Then, a Code Walkthrough will be given.The walkthough will explore code for both an SPI Master and SPI Slave. The example will have the Master generate data for sending to the slave.Finally, there will be a few resources given at the end of the presentation. These resources will allow you to explore in more detail the SPI interface

    標簽: spi協議

    上傳時間: 2022-06-20

    上傳用戶:

  • 學習用PSPICE設計模電實驗

    1.創建一個新項目:激活Design Manager,在菜單File中選擇New Workspace,然后填入項目名稱expl。2.輸入網單文件:在Tools菜單中選擇TextEdit,輸入如下所示的網單文件。3.保存文件:將文件命名為expl.cir。4.對電路進行模擬:在Tools菜單中選擇PspiceA/D,再在PspiceA/D的File菜單中選擇Open,打開已保存過的輸入文件expl.cir。5.檢查出錯:如果文件中出現了語法錯誤,PspiceA/D就會彈出錯誤提示框,并運行Message Viewer,告訴用戶錯誤信息。如果輸入文件沒有語法錯誤,PspiceA/D就顯示正確模擬的對話框,如圖3-3類似,從圖中可讀出電路標題、元器件個數以及計算中所耗內存信息。6.查看輸出文件:在File菜單中選擇examine 0utput,就可以通過Text Editor來瀏覽輸出文件。輸出文件中的各節點電壓如下所示。由此可得出如下所示的靜態工作點參數:Vw=2.9646V,Vow=7.1878-2.1919=4.9959V,Tg=Va/R.=2.1919/2.3=0.953mA。7.觀察輸出波形:在PspiceA/D的File菜單中選擇Run Probe,或者在Design Manager 中選擇Tools下的Probe,都可以調出Probe。Probe自動設置橫坐標,縱坐標必須通過手動添加。在菜單Trace中選擇Add,在Add Traces對話框的Trace Expression中輸入V(6)/V(1),測量放大倍數。8.在Probe中,單擊Plot菜單下的Add YAxis,增加一個新縱軸。9.單擊Trace菜單下的Add,在Trace Expression中輸入V(1)/I(V1),測量輸入電阻,輸出曲線如圖2-2所示。

    標簽: pspice

    上傳時間: 2022-07-02

    上傳用戶:

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