一、信號發生器的價格是多少
凡是產生測試信號的儀器,都可以稱為信號發生器,在測試、研究或調整電子電路及設備時,為測定電路的一些電參量等場所都會用到信號發生器。市面上的信號發生器產品眾多,價格有高有低,小型的簡易信號發生器比較便宜,一般幾十元到上百元就能搞定,普通的信號發生器則普遍要幾千元一臺,一些大型的矢量信號發生器則貴很多,動輒十幾二十萬元一臺,具體價格要看種類、功能、性能參數等諸多方面。購買信號發生器時,除了價格外,還要注意考慮采樣速率、內存深度、垂直分辨率、特點和功能、信號類型和功能、頻率和輸出幅度以及服務等要素,并選擇一個靠譜的信號發生器品牌。
二、信號發生器的使用方法
1、使用前請先(xian)檢査電(dian)(dian)源(yuan)電(dian)(dian)壓(ya)是否為(wei)220V,正確后(hou)方可將電(dian)(dian)源(yuan)線(xian)插頭插入(ru)本儀器(qi)(qi)后(hou)面(mian)板電(dian)(dian)源(yuan)插座內。2、開(kai)機,插入(ru)220V交(jiao)流(liu)電(dian)(dian)源(yuan)線(xian)后(hou),按(an)下(xia)面(mian)板上的電(dian)(dian)源(yuan)開(kai)關,頻(pin)(pin)率(lv)顯示(shi)(shi)窗(chuang)口(kou)顯示(shi)(shi)“1642”,整機開(kai)始工作。3、信(xin)(xin)號(hao)(hao)輸(shu)出(chu)設(she)置(zhi)(zhi):通過(guo)信(xin)(xin)號(hao)(hao)發生器(qi)(qi)上的按(an)鍵對(dui)頻(pin)(pin)率(lv)、波形(xing)、幅(fu)度、對(dui)稱性、直(zhi)流(liu)偏置(zhi)(zhi)、TTL信(xin)(xin)號(hao)(hao)輸(shu)出(chu)、功(gong)(gong)率(lv)信(xin)(xin)號(hao)(hao)輸(shu)出(chu)等進行(xing)設(she)置(zhi)(zhi)。4、頻(pin)(pin)率(lv)測(ce)(ce)量:(1)內測(ce)(ce)量:按(an)動計數(shu)(shu)器(qi)(qi)功(gong)(gong)能選(xuan)擇(ze)按(an)鍵(FUN),選(xuan)擇(ze)到(dao)內測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),此(ci)時(shi)“INT”指示(shi)(shi)燈(deng)亮起(qi),表(biao)(biao)示(shi)(shi)計數(shu)(shu)器(qi)(qi)進人內測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),此(ci)時(shi)頻(pin)(pin)率(lv)顯示(shi)(shi)窗(chuang)口(kou)中顯示(shi)(shi)的為(wei)本儀器(qi)(qi)函數(shu)(shu)信(xin)(xin)號(hao)(hao)輸(shu)出(chu)的頻(pin)(pin)率(lv)。(2)外測(ce)(ce)量:外測(ce)(ce)量頻(pin)(pin)率(lv)時(shi),分(fen)1Hz~10MHz和10~1000MHz兩個量程,按(an)動計數(shu)(shu)器(qi)(qi)功(gong)(gong)能選(xuan)擇(ze)按(an)鍵,選(xuan)擇(ze)到(dao)外測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),“EXT”指示(shi)(shi)燈(deng)亮起(qi)表(biao)(biao)示(shi)(shi)外測(ce)(ce)頻(pin)(pin),測(ce)(ce)量范圍為(wei)lHz~10MHz;“EXT”與(yu)“1GHz”指示(shi)(shi)燈(deng)同時(shi)亮起(qi)表(biao)(biao)示(shi)(shi)外測(ce)(ce)高頻(pin)(pin)率(lv),測(ce)(ce)量范圍10~1000MHz。
三、信號發生器的主要功能和作用
信(xin)號(hao)(hao)發(fa)(fa)生(sheng)(sheng)器(qi)是產(chan)生(sheng)(sheng)各種信(xin)號(hao)(hao)的(de)(de)設備,它(ta)在發(fa)(fa)明之初,主要功(gong)(gong)能是產(chan)生(sheng)(sheng)不同頻率信(xin)號(hao)(hao),利用(yong)(yong)這(zhe)一點(dian),可(ke)將(jiang)其用(yong)(yong)于(yu)調節射頻匹配電(dian)路(lu)。后來隨(sui)著發(fa)(fa)展(zhan),信(xin)號(hao)(hao)發(fa)(fa)生(sheng)(sheng)器(qi)的(de)(de)功(gong)(gong)能得(de)到(dao)了增強,逐(zhu)漸將(jiang)其用(yong)(yong)于(yu)信(xin)號(hao)(hao)質量(liang)的(de)(de)檢測上面,可(ke)定性的(de)(de)分析(xi)一些簡單(dan)的(de)(de)射頻電(dian)路(lu)。隨(sui)著電(dian)子(zi)技術已(yi)經(jing)進入到(dao)了數(shu)字(zi)(zi)時代(dai),數(shu)字(zi)(zi)電(dian)路(lu)、集成芯片(pian)飛速發(fa)(fa)展(zhan),現在的(de)(de)信(xin)號(hao)(hao)發(fa)(fa)生(sheng)(sheng)器(qi)內部電(dian)路(lu)基本采用(yong)(yong)的(de)(de)是數(shu)字(zi)(zi)電(dian)路(lu)來實現的(de)(de),使得(de)信(xin)號(hao)(hao)發(fa)(fa)生(sheng)(sheng)器(qi)產(chan)生(sheng)(sheng)的(de)(de)信(xin)號(hao)(hao)頻率和(he)波形的(de)(de)精度得(de)到(dao)極大的(de)(de)提高,同時還可(ke)實現變頻功(gong)(gong)能,逐(zhu)漸成為(wei)電(dian)工電(dian)子(zi)測試領域應用(yong)(yong)最為(wei)廣泛的(de)(de)儀(yi)器(qi)之一。
四、信號發生器的分類
1、按頻(pin)(pin)段分(fen)(fen):超(chao)低頻(pin)(pin)(0.001 ~1000Hz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);低頻(pin)(pin)(1Hz~1MHz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);視頻(pin)(pin)(20Hz ~10MHz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);高(gao)頻(pin)(pin)(0.1~30MHz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);甚高(gao)頻(pin)(pin)( 30~300MHz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);超(chao)高(gao)頻(pin)(pin)(300~1000MHz)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi);微(wei)波(bo)(bo)(bo)(bo)(1GHz以上)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。2、按輸出波(bo)(bo)(bo)(bo)形分(fen)(fen):(1)正弦(xian)(xian)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi):輸出幅度隨時間(jian)(jian)呈正弦(xian)(xian)(或(huo)余弦(xian)(xian))關(guan)系變化(hua)的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。該信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)應(ying)(ying)用廣(guang)、數(shu)量(liang)多、頻(pin)(pin)段范(fan)圍(wei)也(ye)很寬(kuan)(從(cong)甚低頻(pin)(pin)到(dao)微(wei)波(bo)(bo)(bo)(bo)頻(pin)(pin)段)。(2)函數(shu)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi):一種頻(pin)(pin)率能(neng)(neng)在較(jiao)寬(kuan)的(de)(de)(de)范(fan)圍(wei)內連續可調(diao),輸出方(fang)波(bo)(bo)(bo)(bo)、三角波(bo)(bo)(bo)(bo)、正弦(xian)(xian)波(bo)(bo)(bo)(bo)、鋸齒波(bo)(bo)(bo)(bo)、雙(shuang)脈(mo)沖(chong)波(bo)(bo)(bo)(bo)及梯形波(bo)(bo)(bo)(bo)等(deng)(deng)多種波(bo)(bo)(bo)(bo)形的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。它的(de)(de)(de)頻(pin)(pin)段很寬(kuan),與超(chao)低頻(pin)(pin)正弦(xian)(xian)波(bo)(bo)(bo)(bo)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)一樣適用于自動控(kong)制(zhi)和(he)(he)電子設備的(de)(de)(de)調(diao)試和(he)(he)檢修工(gong)(gong)作(zuo)。(3)脈(mo)沖(chong)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi):指的(de)(de)(de)是(shi)矩(ju)形脈(mo)沖(chong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi),基(ji)本輸出信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)是(shi)矩(ju)形脈(mo)沖(chong)。其主要(yao)工(gong)(gong)作(zuo)特性(xing)是(shi)重復頻(pin)(pin)率、脈(mo)沖(chong)寬(kuan)度、脈(mo)沖(chong)幅度、上升時間(jian)(jian)和(he)(he)上沖(chong)等(deng)(deng),輸出極性(xing)常(chang)可轉換。(4)其他類(lei)型信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。3、按性(xing)能(neng)(neng)分(fen)(fen):(1)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)源(yuan):用來提供(gong)測試設備或(huo)其他電子設備的(de)(de)(de)高(gao)頻(pin)(pin)能(neng)(neng)量(liang),以便進行計(ji)量(liang)與測試,具有(you)較(jiao)大的(de)(de)(de)輸出功率,性(xing)能(neng)(neng)指標要(yao)求一般,又稱簡易信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。(2)標準(zhun)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi):要(yao)求具有(you)輸出信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)頻(pin)(pin)率穩(wen)定(ding)、電平能(neng)(neng)穩(wen)幅和(he)(he)調(diao)制(zhi)系數(shu)可在一定(ding)范(fan)圍(wei)內調(diao)節(jie),并(bing)能(neng)(neng)準(zhun)確(que)讀數(shu)、屏蔽良好的(de)(de)(de)特點。4、按調(diao)制(zhi)類(lei)型分(fen)(fen):分(fen)(fen)為調(diao)幅、調(diao)頻(pin)(pin)、脈(mo)沖(chong)調(diao)制(zhi)及組合調(diao)制(zhi)等(deng)(deng)。高(gao)頻(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)一般是(shi)調(diao)幅的(de)(de)(de),甚高(gao)頻(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)應(ying)(ying)有(you)調(diao)幅和(he)(he)調(diao)頻(pin)(pin),超(chao)高(gao)頻(pin)(pin)和(he)(he)微(wei)波(bo)(bo)(bo)(bo)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)應(ying)(ying)有(you)脈(mo)沖(chong)調(diao)制(zhi)。