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(yong)前請先檢査(cha)電(dian)(dian)源電(dian)(dian)壓是否(fou)為(wei)220V,正確后(hou)方可將(jiang)電(dian)(dian)源線插頭(tou)插入(ru)本儀器(qi)(qi)(qi)后(hou)面板電(dian)(dian)源插座內。2、開機,插入(ru)220V交流(liu)電(dian)(dian)源線后(hou),按下(xia)面板上的(de)電(dian)(dian)源開關,頻(pin)(pin)率(lv)(lv)顯(xian)示窗口顯(xian)示“1642”,整機開始工作(zuo)。3、信號(hao)輸出設置(zhi)(zhi):通過信號(hao)發(fa)生器(qi)(qi)(qi)上的(de)按鍵對(dui)頻(pin)(pin)率(lv)(lv)、波形、幅度、對(dui)稱性、直流(liu)偏置(zhi)(zhi)、TTL信號(hao)輸出、功率(lv)(lv)信號(hao)輸出等(deng)進行(xing)設置(zhi)(zhi)。4、頻(pin)(pin)率(lv)(lv)測(ce)(ce)量(liang)(liang):(1)內測(ce)(ce)量(liang)(liang):按動(dong)計數器(qi)(qi)(qi)功能選擇(ze)按鍵(FUN),選擇(ze)到(dao)內測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),此時(shi)“INT”指示燈(deng)亮起,表(biao)示計數器(qi)(qi)(qi)進人內測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),此時(shi)頻(pin)(pin)率(lv)(lv)顯(xian)示窗口中顯(xian)示的(de)為(wei)本儀器(qi)(qi)(qi)函數信號(hao)輸出的(de)頻(pin)(pin)率(lv)(lv)。(2)外(wai)(wai)測(ce)(ce)量(liang)(liang):外(wai)(wai)測(ce)(ce)量(liang)(liang)頻(pin)(pin)率(lv)(lv)時(shi),分(fen)1Hz~10MHz和10~1000MHz兩(liang)個量(liang)(liang)程,按動(dong)計數器(qi)(qi)(qi)功能選擇(ze)按鍵,選擇(ze)到(dao)外(wai)(wai)測(ce)(ce)頻(pin)(pin)狀態(tai)(tai),“EXT”指示燈(deng)亮起表(biao)示外(wai)(wai)測(ce)(ce)頻(pin)(pin),測(ce)(ce)量(liang)(liang)范圍(wei)為(wei)lHz~10MHz;“EXT”與(yu)“1GHz”指示燈(deng)同(tong)時(shi)亮起表(biao)示外(wai)(wai)測(ce)(ce)高頻(pin)(pin)率(lv)(lv),測(ce)(ce)量(liang)(liang)范圍(wei)10~1000MHz。
三、信號發生器的主要功能和作用
信(xin)號發(fa)(fa)(fa)生(sheng)(sheng)器(qi)是產生(sheng)(sheng)各(ge)種信(xin)號的(de)(de)設備,它在(zai)發(fa)(fa)(fa)明(ming)之初,主要功能是產生(sheng)(sheng)不同頻(pin)率信(xin)號,利用這一點,可將(jiang)其(qi)用于調節射頻(pin)匹配電(dian)(dian)(dian)路(lu)(lu)。后(hou)來(lai)隨(sui)著發(fa)(fa)(fa)展(zhan),信(xin)號發(fa)(fa)(fa)生(sheng)(sheng)器(qi)的(de)(de)功能得到(dao)了增強,逐漸(jian)將(jiang)其(qi)用于信(xin)號質量的(de)(de)檢測(ce)上面,可定性的(de)(de)分析一些簡單的(de)(de)射頻(pin)電(dian)(dian)(dian)路(lu)(lu)。隨(sui)著電(dian)(dian)(dian)子(zi)(zi)技術已經進(jin)入(ru)到(dao)了數(shu)字(zi)時代,數(shu)字(zi)電(dian)(dian)(dian)路(lu)(lu)、集(ji)成芯片飛(fei)速發(fa)(fa)(fa)展(zhan),現(xian)(xian)在(zai)的(de)(de)信(xin)號發(fa)(fa)(fa)生(sheng)(sheng)器(qi)內部電(dian)(dian)(dian)路(lu)(lu)基本采用的(de)(de)是數(shu)字(zi)電(dian)(dian)(dian)路(lu)(lu)來(lai)實現(xian)(xian)的(de)(de),使得信(xin)號發(fa)(fa)(fa)生(sheng)(sheng)器(qi)產生(sheng)(sheng)的(de)(de)信(xin)號頻(pin)率和波(bo)形的(de)(de)精度(du)得到(dao)極大的(de)(de)提(ti)高,同時還(huan)可實現(xian)(xian)變頻(pin)功能,逐漸(jian)成為電(dian)(dian)(dian)工電(dian)(dian)(dian)子(zi)(zi)測(ce)試(shi)領(ling)域(yu)應用最為廣泛的(de)(de)儀器(qi)之一。
四、信號發生器的分類
1、按(an)(an)頻(pin)(pin)(pin)(pin)(pin)(pin)段(duan)(duan)分(fen)(fen):超(chao)低(di)(di)頻(pin)(pin)(pin)(pin)(pin)(pin)(0.001 ~1000Hz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);低(di)(di)頻(pin)(pin)(pin)(pin)(pin)(pin)(1Hz~1MHz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);視頻(pin)(pin)(pin)(pin)(pin)(pin)(20Hz ~10MHz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)(0.1~30MHz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);甚(shen)高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)( 30~300MHz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);超(chao)高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)(300~1000MHz)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi);微(wei)波(bo)(bo)(bo)(1GHz以(yi)上(shang)(shang))信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)。2、按(an)(an)輸出(chu)(chu)波(bo)(bo)(bo)形(xing)(xing)分(fen)(fen):(1)正(zheng)(zheng)弦信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi):輸出(chu)(chu)幅(fu)(fu)(fu)度(du)隨時間(jian)呈(cheng)正(zheng)(zheng)弦(或余弦)關系變化(hua)的(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)。該信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)應用(yong)(yong)廣(guang)、數(shu)量(liang)(liang)多、頻(pin)(pin)(pin)(pin)(pin)(pin)段(duan)(duan)范(fan)圍(wei)也很寬(kuan)(從甚(shen)低(di)(di)頻(pin)(pin)(pin)(pin)(pin)(pin)到微(wei)波(bo)(bo)(bo)頻(pin)(pin)(pin)(pin)(pin)(pin)段(duan)(duan))。(2)函數(shu)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi):一(yi)種(zhong)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)能(neng)在較寬(kuan)的(de)(de)范(fan)圍(wei)內連續可調(diao)(diao)(diao),輸出(chu)(chu)方波(bo)(bo)(bo)、三角波(bo)(bo)(bo)、正(zheng)(zheng)弦波(bo)(bo)(bo)、鋸齒波(bo)(bo)(bo)、雙脈(mo)沖(chong)波(bo)(bo)(bo)及(ji)梯(ti)形(xing)(xing)波(bo)(bo)(bo)等多種(zhong)波(bo)(bo)(bo)形(xing)(xing)的(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)。它的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)段(duan)(duan)很寬(kuan),與超(chao)低(di)(di)頻(pin)(pin)(pin)(pin)(pin)(pin)正(zheng)(zheng)弦波(bo)(bo)(bo)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)一(yi)樣適用(yong)(yong)于(yu)自動控制(zhi)和(he)電(dian)子設(she)備(bei)的(de)(de)調(diao)(diao)(diao)試和(he)檢(jian)修工作。(3)脈(mo)沖(chong)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi):指的(de)(de)是矩(ju)(ju)形(xing)(xing)脈(mo)沖(chong)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi),基本(ben)輸出(chu)(chu)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)是矩(ju)(ju)形(xing)(xing)脈(mo)沖(chong)。其(qi)主(zhu)要工作特性是重復頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)、脈(mo)沖(chong)寬(kuan)度(du)、脈(mo)沖(chong)幅(fu)(fu)(fu)度(du)、上(shang)(shang)升(sheng)時間(jian)和(he)上(shang)(shang)沖(chong)等,輸出(chu)(chu)極性常可轉換(huan)。(4)其(qi)他(ta)類型信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)。3、按(an)(an)性能(neng)分(fen)(fen):(1)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)源:用(yong)(yong)來提供測(ce)試設(she)備(bei)或其(qi)他(ta)電(dian)子設(she)備(bei)的(de)(de)高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)能(neng)量(liang)(liang),以(yi)便進行計量(liang)(liang)與測(ce)試,具有(you)(you)較大的(de)(de)輸出(chu)(chu)功率(lv),性能(neng)指標要求(qiu)一(yi)般,又(you)稱(cheng)簡易信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)。(2)標準信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi):要求(qiu)具有(you)(you)輸出(chu)(chu)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)的(de)(de)頻(pin)(pin)(pin)(pin)(pin)(pin)率(lv)穩(wen)定、電(dian)平能(neng)穩(wen)幅(fu)(fu)(fu)和(he)調(diao)(diao)(diao)制(zhi)系數(shu)可在一(yi)定范(fan)圍(wei)內調(diao)(diao)(diao)節,并(bing)能(neng)準確讀數(shu)、屏蔽良好的(de)(de)特點(dian)。4、按(an)(an)調(diao)(diao)(diao)制(zhi)類型分(fen)(fen):分(fen)(fen)為調(diao)(diao)(diao)幅(fu)(fu)(fu)、調(diao)(diao)(diao)頻(pin)(pin)(pin)(pin)(pin)(pin)、脈(mo)沖(chong)調(diao)(diao)(diao)制(zhi)及(ji)組(zu)合(he)調(diao)(diao)(diao)制(zhi)等。高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)一(yi)般是調(diao)(diao)(diao)幅(fu)(fu)(fu)的(de)(de),甚(shen)高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)應有(you)(you)調(diao)(diao)(diao)幅(fu)(fu)(fu)和(he)調(diao)(diao)(diao)頻(pin)(pin)(pin)(pin)(pin)(pin),超(chao)高(gao)頻(pin)(pin)(pin)(pin)(pin)(pin)和(he)微(wei)波(bo)(bo)(bo)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)(hao)(hao)發(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)(qi)應有(you)(you)脈(mo)沖(chong)調(diao)(diao)(diao)制(zhi)。