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  • 高频电子电路实验指导书V1.0 - 下载本文

    青海11选五怎么中奖 www.skw3.com 高频电子电路实验指导书

    二、实验内容 ·········································································································· - 68 - 三、实验仪器 ·········································································································· - 68 - 四、实验原理 ·········································································································· - 68 - 五、实验步骤 ·········································································································· - 69 - 六、实验报告 ·········································································································· - 69 - 实验二十五 相位鉴频器······························································································· - 70 -

    一、实验目的 ·········································································································· - 70 - 二、实验内容 ·········································································································· - 70 - 三、实验仪器 ·········································································································· - 70 - 四、实验原理 ·········································································································· - 70 - 五、实验步骤 ·········································································································· - 71 - 六、实验报告 ·········································································································· - 71 - 实验二十六 斜率鉴频器······························································································· - 72 -

    一、实验目的 ·········································································································· - 72 - 二、实验内容 ·········································································································· - 72 - 三、实验仪器 ·········································································································· - 72 - 四、实验原理 ·········································································································· - 72 - 五、实验步骤 ·········································································································· - 72 - 六、实验报告 ·········································································································· - 73 - 实验二十七 集成电路鉴频 ··························································································· - 74 -

    一、实验目的 ·········································································································· - 74 - 二、实验内容 ·········································································································· - 74 - 三、实验仪器 ·········································································································· - 74 - 四、实验原理 ·········································································································· - 74 - 五、实验步骤 ·········································································································· - 75 - 六、实验报告 ·········································································································· - 76 - 实验二十八 ASK调制与解调 ······················································································ - 77 -

    一、实验目的 ·········································································································· - 77 - 二、实验内容 ·········································································································· - 77 - 三、实验仪器 ·········································································································· - 77 - 四、实验原理 ·········································································································· - 77 - 五、实验步骤 ·········································································································· - 78 - 六、实验报告 ·········································································································· - 79 - 实验二十九 FSK调制与解调 ······················································································· - 80 -

    一、实验目的 ·········································································································· - 80 - 二、实验内容 ·········································································································· - 80 - 三、实验仪器 ·········································································································· - 80 - 四、实验原理 ·········································································································· - 80 - 五、实验步骤 ·········································································································· - 81 - 六、实验报告 ·········································································································· - 82 -

    VI

    高频电子电路实验指导书

    实验三十 PSK/DPSK调制与解调 ················································································ - 83 -

    一、实验目的 ·········································································································· - 83 - 二、实验内容 ·········································································································· - 83 - 三、实验仪器 ·········································································································· - 83 - 四、实验原理 ·········································································································· - 83 - 五、实验步骤 ·········································································································· - 84 - 六、实验报告 ·········································································································· - 85 -

    VII

    高频电子电路实验指导书

    高频电子电路实验箱总体介绍

    一、概述

    高频电子电路实验箱的实验内容主要是根据高等教育出版社出版的《高频电子线路》一书而设计的(作者张肃文),其中还参考了《电子线路-非线性部分》(作者谢嘉奎)、《高频电子线路》(作者曾兴雯)等教材的部分内容。

    本实验箱由主机和多个??樽槌?,共设置了31个硬件实验。实验箱采用“组合式”结构,将实验所需的直流电源、低频信号源(带简易扫频源)设计成一个公共平台。使用前请仔细阅读实验箱主板上的使用注意事项。

    实验??橐圆灏宓男问讲逶谑笛橄渲靼迳?,除需调节和拨动的元件外,其它元件均焊接在PCB板的反面。??檎嬗∮惺笛榈缏吠?,便于学生理解实验原理。反面使用透明?;ぐ?,一方面便于学生观察元件,另一方面又可对元件加以?;?。

    二、主板简介

    主机提供实验所需的直流电源、信号源(带简易扫频源),它们作为实验工具不开设实验内容。各单元使用方法介绍如下:

    1、直流电源

    本实验箱提供的直流电源是基于本实验箱实验的需求而设计的。主机提供四路直流电源:+12V、+5V、-12V、-5V,共直流地。每路电源都有两个输出端口,分别放置在主板的左上方和右上方。实验时,用实验箱所配置的单相三极电源线,连接220V交流电源和实验箱上侧的电源插座,打开实验箱右侧的船形开关,若正确连接则主板上的电源指示灯点亮。此时,各直流电源端口均有相应的直流电压输出。实验时,应根据??榈奈恢镁徒≡袼璧闹绷鞯缭词涑龆丝?。

    2、低频信号源

    本实验箱提供的低频信号源是基于本实验箱实验的需求而设计的??墒涑稣也?、三角波和方波信号,频率范围分别为:1Hz~10MHz、1Hz~1MHz、1Hz~1MHz。

    数码管LED900~LED907用于显示输出信号的频率,单位为Hz。LED900~LED907依次为10MHz、MHz、100KHz、10KHz、KHz、100Hz、10Hz和Hz位。若输出信号频率为Hz级,则LED900~LED906不显示。若输出信号频率为10Hz级,则LED900~LED905不显示。输出信号频率为其它情况时以此类推。

    本低频信号源带简易扫频源的功能,可产生扫频信号用于定性检测外部网络的频率特性,共有两个扫频频段,分别为10KHz~100KHz和100KHz~1MHz。

    Vout为正弦波、三角波、方波和扫频信号的输出端口,Vi和Vo分别为扫频源的检波输入端和检波输出端。将Vout处扫频信号接到外部网络的输入端,再将外部网络的输出与Vi连接,就可用示波器在Vo处定性观察外部网络的频率特性曲线。

    低频信号源的使用方法介绍如下: (1)开机

    - 1 -

    高频电子电路实验指导书

    接通主机电源,按下开关Power1和Power2,则低频信号源的电源指示灯D100和D101亮。数码管LED900~LED903不显示,LED904~LED907分别显示1、0、0、0,即开机默认输出1KHz的正弦波信号。

    (2)波形选择

    按键TYPE用于改变输出信号的波形,在正弦波输出情况下,按一次TYPE键,则输出信号变为三角波;在三角波输出情况下,按一次TYPE键,则输出信号变为方波;在方波输出的情况下,按一次TYPE键,则输出信号变为正弦波。依此顺序按动TYPE键,则循环输出这三种波形。

    (3)频率选择

    按键RIGHT和LEFT用于选择当前需修改位,开机默认当前修改位为KHz位(LED904)。在非扫频输出的状态下,按一次RIGHT键则修改位右移一位;按一次LEFT键则修改位左移一位。被选中的当前修改位会闪烁显示。

    按键UP和DOWN用于修改当前修改位的数值。在选中当前修改位的情况下,按一次UP键,则当前修改位的数值加1;按一次DOWN键,则当前修改位的数值减1。当当前修改位的数值为所需的数值时,按下ENTER键确定操作,当前修改位会停止闪烁,则Vout处输出所需频率的信号。

    在当前修改位的数值为9的情况下,按一次UP键,则当前修改位数值为0,其左边显示数值加1且当前修改位不变。如在显示频率为1999Hz且当前修改位为10Hz位时,按一次UP键,则显示频率变为2009Hz且当前修改位仍为10Hz位。

    在当前修改位的数值为1,且当前修改为最高位、当前修改位右边第一位的数值不为0的情况下,按一次DOWN键,则当前修改位自动右移一位且原当前修改位不显示。如在显示频率为1100Hz且当前修改位为KHz位时,按一次DOWN键,则显示频率变为100Hz且当前修改位为100Hz位。

    在当前修改位的数值为1,且当前修改为最高位、当前修改位右边第一位的数值为0的情况下,按一次DOWN键,则当前修改位自动右移一位(且该位数值变为9)且原当前修改位不显示。如在显示频率为1000Hz且当前修改位为KHz位时,按一次DOWN键,则显示频率变为900且当前修改位为100Hz位。

    在当前修改位的数值为0的情况下,按一次DOWN键,则当前修改位的数值变为9且当前修改位左边显示的数值减1。如在显示频率为100Hz且当前修改位为Hz时,按一次DOWN键,则显示频率变为99Hz且当前修改位不变。

    (4)幅度调节

    双刀三掷开关U70用于选择输出信号幅度的衰减量,U70拨到最上端、中间和最下端时,衰减量分别为0dB、20dB和40dB。即U70用于输出信号幅度的粗调。

    “幅度调节”电位器用于对输出信号的幅度进行细调,当衰减量为0dB时,调节“幅度调节”电位器,则输出信号的峰峰值范围为1.5V~15V;当衰减量为20dB时,调节“幅度调节”电位器,则输出信号的峰峰值范围为150mV~1.5V;当衰减量为40dB时,调节“幅度调节”电位器,则输出信号的峰峰值范围为80mV~150mV。

    说明:当输出信号的峰峰值较小时,由于噪声干扰相对较大,输出信号波形会有抖动,属于正常现象。

    (5)占空比调节

    - 2 -

    高频电子电路实验指导书

    在输出信号为方波的情况下,调节“占空比调节”电位器可改变方波的占空比。

    说明:严格地说,方波是指占空比为50%的矩形波,当占空比不为50%时,只能称为矩形波。本实验指导书此处不做区别。

    (6)直流电平调节

    在任意波形输出或扫频输出的情况下,调节“电平调节”电位器,可改变输出信号的直流量。

    (7)扫频输出

    在点频输出的情况下,按一次SWEEP键,则Vout输出10KHz~100KHz的扫频信号;连续按两次SWEEP键,则Vout输出100KHz~1MHz的扫频信号;连续按三次SWEEP键,则回到输出扫频前的状态。

    (8)复位

    在通电后的任意情况下,按下RESET键,则信号源复位,恢复到输出1KHz正弦波信号的状态。

    三、??榻樯?

    基本??椋?

    1、小信号放大器??椋?

    (1)实验一 ——高频小信号调谐放大器(单级单调谐、单级双调谐、两级单调谐、两级双调谐)

    (2)实验二 ——场效应管谐振放大器 (3)实验三 ——集成选频放大器 (4)实验四 ——三极管倍频器 2、高频功率放大器??椋?

    (1)实验五 ——高频谐振功率放大器 (2)实验六 ——集成高频功率放大器 (3)实验七 ——宽带功率放大器 (4)实验十二 ——集电极调幅 3、正弦波振荡器??椋?

    (1)实验八 ――三点式LC振荡器及压控振荡器 (2)实验九 ——石英晶体振荡器 (3)实验十 ——RC振荡器

    (4)实验十一 ——集成电路振荡器 (5)实验十七 ——变容二极管调频 4、幅度调制与解调??椋?

    (1)实验十三 ——乘法器调幅(AM、DSB、SSB) (2)实验十四 ——二极管峰值包络检波 (3)实验十五 ——同步检波 (4)实验十六 ——小信号检波 5、角度调制??椋?

    (1)实验十八 ——直接调频

    (2)实验十九 ——间接调频(选做)

    - 3 -





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  • [大笑]阿Q都是这么说的。。。。。。 2019-05-31
  • 曾祖红:天津欢乐谷二期将于6月30日对外开放 2019-05-28
  • 新发现:墨西哥发现恐龙新物种 2019-05-21
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