Thesingle(Agilent81618A)ordual(Agilent81619A)interfacemodulesareusedtoconnectopticalheads(Agilent8162x)tothemainframes8163A/B,8164A/Bor8166A/B.Followingopticalheadsareusedwiththeseinterfaces:81623BGe,+10dBmto-80dBm81624B5mmInGaAs,+10dBmto-90dBm81626BInGaAs,+27dBmto-70dBm81628BInGaAs,+40dBmto-60dBm特性fullycompatiblewithall8152xand8162xOpticalHeadsfitsinall8163/8164/8166-seriesFlexibilitythrough1-and2-channeloption)