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(qian)請先檢査電(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)壓是否為220V，正(zheng)確后(hou)方可將(jiang)電(dian)(dian)(dian)(dian)源(yuan)(yuan)線(xian)(xian)插(cha)頭(tou)插(cha)入(ru)本(ben)儀器后(hou)面板電(dian)(dian)(dian)(dian)源(yuan)(yuan)插(cha)座內。2、開(kai)機，插(cha)入(ru)220V交流電(dian)(dian)(dian)(dian)源(yuan)(yuan)線(xian)(xian)后(hou)，按(an)下面板上的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)(yuan)開(kai)關(guan)，頻(pin)(pin)率(lv)(lv)顯示(shi)(shi)窗(chuang)(chuang)口顯示(shi)(shi)“1642”，整(zheng)機開(kai)始(shi)工作。3、信號(hao)(hao)輸出設(she)置：通過信號(hao)(hao)發(fa)生器上的(de)(de)按(an)鍵對(dui)頻(pin)(pin)率(lv)(lv)、波(bo)形、幅度、對(dui)稱性、直流偏(pian)置、TTL信號(hao)(hao)輸出、功(gong)率(lv)(lv)信號(hao)(hao)輸出等進行設(she)置。4、頻(pin)(pin)率(lv)(lv)測(ce)量(liang)：（1）內測(ce)量(liang)：按(an)動(dong)計(ji)數器功(gong)能(neng)選(xuan)擇按(an)鍵（FUN)，選(xuan)擇到內測(ce)頻(pin)(pin)狀態，此時(shi)“INT”指示(shi)(shi)燈亮起(qi)(qi)，表示(shi)(shi)計(ji)數器進人內測(ce)頻(pin)(pin)狀態，此時(shi)頻(pin)(pin)率(lv)(lv)顯示(shi)(shi)窗(chuang)(chuang)口中(zhong)顯示(shi)(shi)的(de)(de)為本(ben)儀器函數信號(hao)(hao)輸出的(de)(de)頻(pin)(pin)率(lv)(lv)。（2）外(wai)測(ce)量(liang)：外(wai)測(ce)量(liang)頻(pin)(pin)率(lv)(lv)時(shi)，分1Hz~10MHz和(he)10~1000MHz兩個量(liang)程，按(an)動(dong)計(ji)數器功(gong)能(neng)選(xuan)擇按(an)鍵，選(xuan)擇到外(wai)測(ce)頻(pin)(pin)狀態，“EXT”指示(shi)(shi)燈亮起(qi)(qi)表示(shi)(shi)外(wai)測(ce)頻(pin)(pin)，測(ce)量(liang)范(fan)(fan)圍為lHz~10MHz；“EXT”與(yu)“1GHz”指示(shi)(shi)燈同時(shi)亮起(qi)(qi)表示(shi)(shi)外(wai)測(ce)高頻(pin)(pin)率(lv)(lv)，測(ce)量(liang)范(fan)(fan)圍10~1000MHz。
三、信號發生器的主要功能和作用
信(xin)(xin)(xin)號(hao)發(fa)生(sheng)器是(shi)(shi)產生(sheng)各種信(xin)(xin)(xin)號(hao)的(de)(de)設(she)備，它在發(fa)明之初，主要(yao)功能是(shi)(shi)產生(sheng)不(bu)同頻(pin)率信(xin)(xin)(xin)號(hao)，利用(yong)(yong)這一點，可(ke)將其用(yong)(yong)于(yu)調節射頻(pin)匹配電(dian)(dian)(dian)路(lu)。后來隨著發(fa)展(zhan)，信(xin)(xin)(xin)號(hao)發(fa)生(sheng)器的(de)(de)功能得到(dao)了(le)(le)增強，逐漸(jian)將其用(yong)(yong)于(yu)信(xin)(xin)(xin)號(hao)質量的(de)(de)檢測(ce)上面，可(ke)定性的(de)(de)分析一些簡單的(de)(de)射頻(pin)電(dian)(dian)(dian)路(lu)。隨著電(dian)(dian)(dian)子技術已經(jing)進入到(dao)了(le)(le)數字(zi)(zi)時代，數字(zi)(zi)電(dian)(dian)(dian)路(lu)、集成(cheng)芯片飛(fei)速發(fa)展(zhan)，現在的(de)(de)信(xin)(xin)(xin)號(hao)發(fa)生(sheng)器內部電(dian)(dian)(dian)路(lu)基(ji)本采用(yong)(yong)的(de)(de)是(shi)(shi)數字(zi)(zi)電(dian)(dian)(dian)路(lu)來實現的(de)(de)，使得信(xin)(xin)(xin)號(hao)發(fa)生(sheng)器產生(sheng)的(de)(de)信(xin)(xin)(xin)號(hao)頻(pin)率和波形的(de)(de)精度得到(dao)極大的(de)(de)提高(gao)，同時還(huan)可(ke)實現變頻(pin)功能，逐漸(jian)成(cheng)為(wei)電(dian)(dian)(dian)工電(dian)(dian)(dian)子測(ce)試領域應用(yong)(yong)最為(wei)廣(guang)泛的(de)(de)儀器之一。
四、信號發生器的分類
1、按頻(pin)(pin)(pin)(pin)段分(fen)：超低頻(pin)(pin)(pin)(pin)（0.001 ~1000Hz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；低頻(pin)(pin)(pin)(pin)（1Hz~1MHz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；視頻(pin)(pin)(pin)(pin)（20Hz ~10MHz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；高(gao)(gao)頻(pin)(pin)(pin)(pin)（0.1～30MHz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；甚(shen)高(gao)(gao)頻(pin)(pin)(pin)(pin)（ 30~300MHz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；超高(gao)(gao)頻(pin)(pin)(pin)(pin)（300~1000MHz）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)；微波(bo)(bo)(bo)(bo)(bo)（1GHz以上(shang)）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)。2、按輸(shu)出(chu)波(bo)(bo)(bo)(bo)(bo)形分(fen)：（1）正(zheng)弦信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)：輸(shu)出(chu)幅(fu)(fu)度(du)隨時間呈正(zheng)弦（或余弦）關系變化的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)。該信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)應用廣(guang)、數量多(duo)、頻(pin)(pin)(pin)(pin)段范圍也很寬(kuan)（從甚(shen)低頻(pin)(pin)(pin)(pin)到(dao)微波(bo)(bo)(bo)(bo)(bo)頻(pin)(pin)(pin)(pin)段）。（2）函數發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)：一(yi)種頻(pin)(pin)(pin)(pin)率(lv)(lv)能(neng)(neng)在較寬(kuan)的(de)(de)范圍內連續可(ke)(ke)調(diao)，輸(shu)出(chu)方波(bo)(bo)(bo)(bo)(bo)、三角波(bo)(bo)(bo)(bo)(bo)、正(zheng)弦波(bo)(bo)(bo)(bo)(bo)、鋸齒波(bo)(bo)(bo)(bo)(bo)、雙脈沖(chong)(chong)(chong)(chong)波(bo)(bo)(bo)(bo)(bo)及梯形波(bo)(bo)(bo)(bo)(bo)等多(duo)種波(bo)(bo)(bo)(bo)(bo)形的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)。它的(de)(de)頻(pin)(pin)(pin)(pin)段很寬(kuan)，與超低頻(pin)(pin)(pin)(pin)正(zheng)弦波(bo)(bo)(bo)(bo)(bo)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)一(yi)樣(yang)適用于自動控制和(he)(he)電子(zi)設備的(de)(de)調(diao)試和(he)(he)檢修工(gong)作。（3）脈沖(chong)(chong)(chong)(chong)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)：指(zhi)的(de)(de)是(shi)矩(ju)(ju)形脈沖(chong)(chong)(chong)(chong)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)，基本輸(shu)出(chu)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)是(shi)矩(ju)(ju)形脈沖(chong)(chong)(chong)(chong)。其主要(yao)工(gong)作特性(xing)是(shi)重復頻(pin)(pin)(pin)(pin)率(lv)(lv)、脈沖(chong)(chong)(chong)(chong)寬(kuan)度(du)、脈沖(chong)(chong)(chong)(chong)幅(fu)(fu)度(du)、上(shang)升時間和(he)(he)上(shang)沖(chong)(chong)(chong)(chong)等，輸(shu)出(chu)極性(xing)常可(ke)(ke)轉(zhuan)換。（4）其他類型信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)。3、按性(xing)能(neng)(neng)分(fen)：（1）信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)源：用來提(ti)供測(ce)試設備或其他電子(zi)設備的(de)(de)高(gao)(gao)頻(pin)(pin)(pin)(pin)能(neng)(neng)量，以便進行計量與測(ce)試，具有(you)較大的(de)(de)輸(shu)出(chu)功(gong)率(lv)(lv)，性(xing)能(neng)(neng)指(zhi)標要(yao)求一(yi)般，又稱簡易信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)。（2）標準信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)：要(yao)求具有(you)輸(shu)出(chu)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)的(de)(de)頻(pin)(pin)(pin)(pin)率(lv)(lv)穩定、電平能(neng)(neng)穩幅(fu)(fu)和(he)(he)調(diao)制系數可(ke)(ke)在一(yi)定范圍內調(diao)節(jie)，并能(neng)(neng)準確讀數、屏蔽良好的(de)(de)特點。4、按調(diao)制類型分(fen)：分(fen)為(wei)調(diao)幅(fu)(fu)、調(diao)頻(pin)(pin)(pin)(pin)、脈沖(chong)(chong)(chong)(chong)調(diao)制及組合調(diao)制等。高(gao)(gao)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)一(yi)般是(shi)調(diao)幅(fu)(fu)的(de)(de)，甚(shen)高(gao)(gao)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)應有(you)調(diao)幅(fu)(fu)和(he)(he)調(diao)頻(pin)(pin)(pin)(pin)，超高(gao)(gao)頻(pin)(pin)(pin)(pin)和(he)(he)微波(bo)(bo)(bo)(bo)(bo)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)(hao)發(fa)(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)(qi)應有(you)脈沖(chong)(chong)(chong)(chong)調(diao)制。
