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直流电(dian)源的(de)技(ji)术(shu)指(zhi)标分为两种(zhong):一种(zhong)是特性指(zhi)标，包(bao)括(kuo)允许(xu)输(shu)入电(dian)压(ya)(ya)、输(shu)出电(dian)压(ya)(ya)、输(shu)出电(dian)流及输(shu)出电(dian)压(ya)(ya)调(diao)节范围等;另一种(zhong)是质量(liang)指(zhi)标，用来(lai)衡量(liang)输(shu)出直流电(dian)压(ya)(ya)的(de)稳定(ding)程(cheng)度，包(bao)括(kuo)稳压(ya)(ya)系(xi)数(shu)(或电(dian)压(ya)(ya)调(diao)整率)、输(shu)出电(dian)阻(或电(dian)流调(diao)整率)、纹波电(dian)压(ya)(ya)(周围与(yu)随机漂移)。

1) 稳(wen)(wen)压(ya)系(xi)数及电(dian)(dian)压(ya)调整(zheng)(zheng)率(lv)(lv):稳(wen)(wen)压(ya)系(xi)数是指在负载电(dian)(dian)流、环境温度不变(bian)(bian)的(de)情况下，输(shu)入(ru)电(dian)(dian)压(ya)的(de)相对(dui)变(bian)(bian)化(hua)(hua)引起输(shu)出(chu)电(dian)(dian)压(ya)的(de)相对(dui)变(bian)(bian)化(hua)(hua)。 电(dian)(dian)压(ya)调整(zheng)(zheng)率(lv)(lv)是指输(shu)入(ru)电(dian)(dian)压(ya)相对(dui)变(bian)(bian)化(hua)(hua)为(wei)±10%时(shi)的(de)输(shu)出(chu)电(dian)(dian)压(ya)相对(dui)变(bian)(bian)化(hua)(hua)量，稳(wen)(wen)压(ya)系(xi)数和(he)电(dian)(dian)压(ya)调整(zheng)(zheng)率(lv)(lv)均说明输(shu)入(ru)电(dian)(dian)压(ya)变(bian)(bian)化(hua)(hua)对(dui)输(shu)出(chu)电(dian)(dian)压(ya)的(de)影响，因此只需(xu)测(ce)试其中(zhong)之一即可。

2) 输(shu)(shu)出(chu)电(dian)阻及电(dian)流(liu)调(diao)(diao)整(zheng)(zheng)率:输(shu)(shu)出(chu)电(dian)阻与放大器(qi)的输(shu)(shu)出(chu)电(dian)阻相(xiang)同，其值(zhi)(zhi)为当输(shu)(shu)入电(dian)压(ya)不变时，输(shu)(shu)出(chu)电(dian)压(ya)变化量(liang)与输(shu)(shu)出(chu)电(dian)流(liu)变化量(liang)之(zhi)比的绝对(dui)(dui)值(zhi)(zhi)。电(dian)流(liu)调(diao)(diao)整(zheng)(zheng)率:输(shu)(shu)出(chu)电(dian)流(liu)从0变到最大值(zhi)(zhi)时所(suo)产(chan)生(sheng)的输(shu)(shu)出(chu)电(dian)压(ya)相(xiang)对(dui)(dui)变化值(zhi)(zhi)。输(shu)(shu)出(chu)电(dian)阻和电(dian)流(liu)调(diao)(diao)整(zheng)(zheng)率均(jun)说明负载电(dian)流(liu)变化对(dui)(dui)输(shu)(shu)出(chu)电(dian)压(ya)的影(ying)响，因此也只需(xu)测试其中之(zhi)一即可(ke)。

3)纹波电(dian)(dian)压(ya):叠加在输出电(dian)(dian)压(ya)上的(de)交流(liu)(liu)电(dian)(dian)压(ya)分量。用示波器观测(ce)其(qi)峰峰值(zhi)一(yi)般为毫(hao)伏量级。也可用交流(liu)(liu)毫(hao)伏表(biao)测(ce)量其(qi)有(you)效值(zhi)，但因纹波不是正弦波，所以有(you)一(yi)定的(de)误差(cha)，一(yi)般直流(liu)(liu)电(dian)(dian)源的(de)纹波电(dian)(dian)压(ya)VP-P≤10mV。