技术文章_第(4)页－康宝智信测量技术（北京）有限公司

2023-09-09

阻(zu)(zu)抗匹(pi)配(pei)變壓器(qi)的(de)(de)作(zuo)用是確保信號源的(de)(de)輸(shu)出阻(zu)(zu)抗與負載的(de)(de)輸(shu)入阻(zu)(zu)抗相等，從而(er)使得功率傳(chuan)輸(shu)大化，能(neng)量損耗最小化。它的(de)(de)功能(neng)包括寬(kuan)帶(dai)(dai)特性(xing)、匝(za)數(shu)比調整、電氣隔(ge)離等。阻(zu)(zu)抗匹(pi)配(pei)變壓器(qi)的(de)(de)功能(neng)：1.寬(kuan)帶(dai)(dai)特性(xing)：匹(pi)配(pei)變壓器(qi)具有(you)寬(kuan)帶(dai)(dai)特性(xing)，這(zhe)意味著(zhu)它們可以在較(jiao)寬(kuan)的(de)(de)頻(pin)率范圍內(nei)有(you)效地工作(zuo)。這(zhe)對于需要在不(bu)同頻(pin)率下運行...

2023
11-3

雙通道濾波器的工作原理及優勢雙(shuang)通道(dao)濾(lv)(lv)波器(qi)(qi)是(shi)一種電子(zi)設備(bei)，它(ta)有(you)兩個(ge)(ge)獨(du)(du)立(li)的(de)(de)(de)通道(dao)，可以(yi)同(tong)(tong)(tong)(tong)時處理(li)(li)兩個(ge)(ge)不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)(de)信(xin)(xin)號或(huo)數(shu)(shu)據流(liu)。這(zhe)種濾(lv)(lv)波器(qi)(qi)通常由兩個(ge)(ge)完全相同(tong)(tong)(tong)(tong)的(de)(de)(de)濾(lv)(lv)波器(qi)(qi)組(zu)成，每個(ge)(ge)濾(lv)(lv)波器(qi)(qi)都可以(yi)獨(du)(du)立(li)地(di)調整其參數(shu)(shu)，以(yi)實現不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)(de)信(xin)(xin)號處理(li)(li)目的(de)(de)(de)。雙(shuang)通道(dao)濾(lv)(lv)波器(qi)(qi)的(de)(de)(de)工作原理(li)(li)是(shi)基于信(xin)(xin)號的(de)(de)(de)頻率(lv)特性。它(ta)可以(yi)將輸(shu)入(ru)信(xin)(xin)號分(fen)解為(wei)不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)(de)頻率(lv)成分(fen)，然后通過調整濾(lv)(lv)波器(qi)(qi)的(de)(de)(de)參數(shu)(shu)，選(xuan)擇性地(di)傳遞或(huo)阻止(zhi)某些頻率(lv)成分(fen)。這(zhe)樣，兩個(ge)(ge)通道(dao)可以(yi)同(tong)(tong)(tong)(tong)時處理(li)(li)不(bu)(bu)同(tong)(tong)(tong)(tong)的(de)(de)(de)信(xin)(xin)號或(huo)數(shu)(shu)據流(liu)，并且可以(yi)根(gen)據需要(yao)進行合成或(huo)組(zu)合。雙(shuang)通道(dao)濾(lv)(lv)波器(qi)(qi)的(de)(de)(de)優(you)勢在于它(ta)可以(yi)實現并行處理(li)(li)，提高了數(shu)(shu)據處理(li)(li)的(de)(de)(de)效率(lv)和(he)速度(du)。同(tong)(tong)(tong)(tong)時，...
2023
10-11

直流電源校準器的操作與維護指南一(yi)、直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)器的(de)(de)操作(zuo)步驟：開(kai)啟設備(bei)前，確保(bao)已經閱讀并理(li)解了(le)操作(zuo)指南。打開(kai)直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)器，確保(bao)其正常啟動并進入主(zhu)界面(mian)。在主(zhu)界面(mian)上(shang)，選擇(ze)“設置”選項(xiang)，然后選擇(ze)“電(dian)(dian)(dian)源(yuan)(yuan)(yuan)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)”或(huo)類似選項(xiang)。在電(dian)(dian)(dian)源(yuan)(yuan)(yuan)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)界面(mian)上(shang)，選擇(ze)您要(yao)(yao)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)的(de)(de)直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)類型(xing)。輸(shu)入您要(yao)(yao)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)的(de)(de)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)的(de)(de)電(dian)(dian)(dian)壓和(he)電(dian)(dian)(dian)流(liu)(liu)值，并根據需(xu)要(yao)(yao)進行負(fu)載條(tiao)件設置。啟動校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)過(guo)程(cheng)，等待校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)結(jie)(jie)果。根據校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)結(jie)(jie)果，對(dui)直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)進行調整(zheng)或(huo)維修。二、直(zhi)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)校(xiao)(xiao)(xiao)準(zhun)(zhun)(zhun)器的(de)(de)維護指南：設備(bei)應定期進行清(qing)潔，以保(bao)持其良好的(de)(de)工作(zuo)狀態。定期檢查設備(bei)的(de)(de)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)線(xian)、接口(kou)和(he)連(lian)接是(shi)否完好無損。對(dui)...
2023
9-21

寬帶功率放大器的性能指標與評估方法寬帶功(gong)(gong)率(lv)(lv)放(fang)(fang)大器(qi)的(de)性能指(zhi)標(biao)(biao)與評估方(fang)法主要包括(kuo)以下幾個方(fang)面：額(e)定(ding)輸(shu)(shu)出(chu)(chu)(chu)(chu)功(gong)(gong)率(lv)(lv)：這是指(zhi)在一(yi)定(ding)的(de)諧(xie)波(bo)(bo)失真(zhen)指(zhi)標(biao)(biao)內，寬帶功(gong)(gong)放(fang)(fang)輸(shu)(shu)出(chu)(chu)(chu)(chu)的(de)最(zui)大功(gong)(gong)率(lv)(lv)。一(yi)般來說，功(gong)(gong)放(fang)(fang)的(de)負(fu)載和諧(xie)波(bo)(bo)失真(zhen)指(zhi)標(biao)(biao)不同，額(e)定(ding)輸(shu)(shu)出(chu)(chu)(chu)(chu)功(gong)(gong)率(lv)(lv)也會(hui)有(you)(you)所不同。通常采用連(lian)續正(zheng)弦波(bo)(bo)作為(wei)(wei)(wei)測(ce)量(liang)(liang)信(xin)號，給功(gong)(gong)放(fang)(fang)輸(shu)(shu)入頻率(lv)(lv)為(wei)(wei)(wei)1000Hz的(de)正(zheng)弦信(xin)號，測(ce)出(chu)(chu)(chu)(chu)等阻(zu)負(fu)載電阻(zu)上的(de)電壓有(you)(you)效值V，計算(suan)出(chu)(chu)(chu)(chu)功(gong)(gong)放(fang)(fang)的(de)輸(shu)(shu)出(chu)(chu)(chu)(chu)功(gong)(gong)率(lv)(lv)P，即P=V^2/RL，這里的(de)RL為(wei)(wei)(wei)揚聲器(qi)的(de)阻(zu)抗(kang)。當音量(liang)(liang)逐漸開(kai)大時(shi)，功(gong)(gong)放(fang)(fang)開(kai)始(shi)過載，波(bo)(bo)形削(xue)頂(ding)，諧(xie)波(bo)(bo)失真(zhen)加大。當諧(xie)波(bo)(bo)失真(zhen)為(wei)(wei)(wei)10%時(shi)的(de)平均功(gong)(gong)率(lv)(lv)，稱為(wei)(wei)(wei)額(e)定(ding)輸(shu)(shu)出(chu)(chu)(chu)(chu)功(gong)(gong)率(lv)(lv)，又稱最(zui)大...
2023
8-9

如何安全使用功率放大器由(you)于(yu)功(gong)(gong)(gong)率(lv)放(fang)大(da)器通常進(jin)行負載的(de)(de)驅動，而負載的(de)(de)特性(xing)的(de)(de)復(fu)雜，決定(ding)了我們(men)使(shi)用功(gong)(gong)(gong)率(lv)放(fang)大(da)器的(de)(de)風險(xian)，如(ru)果安(an)(an)全的(de)(de)使(shi)用功(gong)(gong)(gong)率(lv)放(fang)大(da)器需要注意的(de)(de)問題。1、選擇合適(shi)功(gong)(gong)(gong)率(lv)的(de)(de)放(fang)大(da)器，對于(yu)待(dai)輸入(ru)信號進(jin)行預估電壓電流、功(gong)(gong)(gong)率(lv)、頻率(lv)、波形(xing)等(參見如(ru)何(he)選擇功(gong)(gong)(gong)率(lv)放(fang)大(da)器)。2、保證(zheng)功(gong)(gong)(gong)率(lv)放(fang)大(da)器安(an)(an)全接地。3、查(cha)看說明書(shu)看廠家對應(ying)產品(pin)是否支持(chi)長時(shi)間連續工作能力。4、注意儀器的(de)(de)散熱。5、前端連接線的(de)(de)穩定(ding)可靠，防止(zhi)短路(lu)發生。6、信號源輸入(ru)信號再(zai)安(an)(an)全范(fan)圍之內。Krohn-Hite公司(si)的(de)(de)Model7500是較早的(de)(de)一個直(zhi)接耦合的(de)(de)寬帶(dai)功(gong)(gong)(gong)...
2023
8-3

直流電源校準器的主要功能和應用直流電源(yuan)校(xiao)(xiao)準(zhun)(zhun)器是(shi)一種專業設(she)備，用于校(xiao)(xiao)準(zhun)(zhun)和測試直流電源(yuan)的(de)(de)輸(shu)(shu)(shu)出(chu)精(jing)(jing)度(du)和穩(wen)定性。它(ta)(ta)能夠模擬不同負載條(tiao)件下的(de)(de)電壓和電流，通(tong)過(guo)比較(jiao)校(xiao)(xiao)準(zhun)(zhun)儀和待校(xiao)(xiao)準(zhun)(zhun)電源(yuan)之(zhi)間的(de)(de)差異，確(que)定電源(yuan)輸(shu)(shu)(shu)出(chu)是(shi)否符(fu)合標準(zhun)(zhun)要求。電源(yuan)校(xiao)(xiao)準(zhun)(zhun)器通(tong)常由控(kong)制單元、校(xiao)(xiao)準(zhun)(zhun)模塊(kuai)和顯(xian)示屏等(deng)組(zu)成，用戶(hu)可以通(tong)過(guo)界面操作來(lai)完成校(xiao)(xiao)準(zhun)(zhun)過(guo)程。主要功能校(xiao)(xiao)準(zhun)(zhun)精(jing)(jing)度(du)高：可以提(ti)供(gong)非(fei)常高的(de)(de)校(xiao)(xiao)準(zhun)(zhun)精(jing)(jing)度(du)，通(tong)常在(zai)微(wei)(wei)伏至千伏的(de)(de)電壓范(fan)圍內，微(wei)(wei)安至千安的(de)(de)電流范(fan)圍內進(jin)行(xing)校(xiao)(xiao)準(zhun)(zhun)。它(ta)(ta)能夠模擬各(ge)種負載條(tiao)件下的(de)(de)輸(shu)(shu)(shu)出(chu)，并通(tong)過(guo)精(jing)(jing)確(que)的(de)(de)測量和比較(jiao)，確(que)保(bao)電源(yuan)輸(shu)(shu)(shu)出(chu)的(de)(de)準(zhun)(zhun)確(que)性。穩(wen)定性強：能夠提(ti)供(gong)高穩(wen)定性的(de)(de)電...
2023
7-25

功率放大器為什么要關注阻抗匹配問題？如何進行阻抗匹配？功(gong)率(lv)放(fang)大(da)器(qi)的(de)匹配(pei)(pei)方法在(zai)線性(xing)網絡(luo)設計中(zhong)，為獲得最大(da)功(gong)率(lv)傳(chuan)輸(shu)(shu)，網絡(luo)通(tong)常(chang)采用(yong)共軛(e)阻(zu)抗匹配(pei)(pei)方式，但由(you)于功(gong)率(lv)放(fang)大(da)器(qi)輸(shu)(shu)入、輸(shu)(shu)出(chu)阻(zu)抗呈現非(fei)線性(xing)，不可能實(shi)現共軛(e)匹配(pei)(pei)，通(tong)常(chang)是將(jiang)(jiang)50Ω負(fu)載(zai)變換到這樣一個阻(zu)抗值，其實(shi)部(bu)可在(zai)輸(shu)(shu)入、輸(shu)(shu)出(chu)偏置電壓(ya)下獲得最大(da)輸(shu)(shu)出(chu)功(gong)率(lv)，其虛部(bu)可以(yi)將(jiang)(jiang)晶體管內部(bu)寄(ji)生元件(jian)調諧掉，該網絡(luo)變換成(cheng)的(de)阻(zu)抗稱為最佳負(fu)載(zai)阻(zu)抗，也稱為動(dong)態輸(shu)(shu)出(chu)阻(zu)抗。由(you)于功(gong)率(lv)放(fang)大(da)器(qi)工作于非(fei)線性(xing)，小信(xin)號放(fang)大(da)器(qi)的(de)網絡(luo)設計方法不再適用(yong)。通(tong)常(chang)采用(yong)以(yi)下三(san)種方法來設計功(gong)率(lv)放(fang)大(da)器(qi)的(de)匹配(pei)(pei)網絡(luo)：動(dong)態阻(zu)抗法、大(da)信(xin)號S參(can)數法和負(fu)載(zai)牽引...
2023
6-21

插座電源濾波器怎么選擇呢必須在電(dian)(dian)(dian)子設備的(de)(de)(de)電(dian)(dian)(dian)源(yuan)線上安裝(zhuang)濾(lv)(lv)(lv)波(bo)(bo)器。電(dian)(dian)(dian)源(yuan)濾(lv)(lv)(lv)波(bo)(bo)器允許(xu)設備使(shi)用電(dian)(dian)(dian)力通(tong)(tong)過(guo)，防(fang)止(zhi)過(guo)多的(de)(de)(de)干(gan)(gan)擾能(neng)量通(tong)(tong)過(guo)。電(dian)(dian)(dian)源(yuan)濾(lv)(lv)(lv)波(bo)(bo)器是一種(zhong)雙向裝(zhuang)置(zhi)，既能(neng)防(fang)止(zhi)外(wai)界干(gan)(gan)擾進入裝(zhuang)置(zhi)，又能(neng)防(fang)止(zhi)干(gan)(gan)擾沿電(dian)(dian)(dian)源(yuan)線傳(chuan)輸(shu)。因此，電(dian)(dian)(dian)源(yuan)濾(lv)(lv)(lv)波(bo)(bo)器對于(yu)傳(chuan)導發射、輻射發射、傳(chuan)導靈敏度和(he)輻射敏感性(xing)測(ce)試(shi)的(de)(de)(de)順利通(tong)(tong)過(guo)是不可少的(de)(de)(de)。電(dian)(dian)(dian)源(yuan)濾(lv)(lv)(lv)波(bo)(bo)器的(de)(de)(de)效果用插(cha)入損(sun)耗(hao)來表示(shi)(shi)，它類似于(yu)屏(ping)蔽材料(liao)的(de)(de)(de)屏(ping)蔽效能(neng)，它是指濾(lv)(lv)(lv)波(bo)(bo)器流過(guo)濾(lv)(lv)(lv)波(bo)(bo)器的(de)(de)(de)信(xin)號電(dian)(dian)(dian)流的(de)(de)(de)損(sun)耗(hao)程度，以dB表示(shi)(shi)。所有的(de)(de)(de)電(dian)(dian)(dian)源(yuan)濾(lv)(lv)(lv)波(bo)(bo)器都是低(di)(di)通(tong)(tong)濾(lv)(lv)(lv)波(bo)(bo)器。所謂(wei)低(di)(di)通(tong)(tong)濾(lv)(lv)(lv)波(bo)(bo)器，低(di)(di)頻插(cha)入損(sun)耗(hao)很小，允許(xu)低(di)(di)頻電(dian)(dian)(dian)流通(tong)(tong)過(guo)，高頻插(cha)入損(sun)耗(hao)大(da)，防(fang)止(zhi)...

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