What:Agilent is offering a free application note, "Preamplifiers and System Noise Figure." Engineers can learn how to improve the accuracy of their measurements by using a low noise amplifier in front of a spectrum analyzer to reduce the effective noise figure of RF and microwave test systems. This paper discusses applications and characteristics of Agilent's latest amplifier technology. Highlighted are Agilent's New 87405C portable preamplifiers that provide exceptional gain of 25 dB and a probe-power bias connection. Agilent's new preamplifiers eliminate the hassle of an additional DC power supply, making this an ideal solution for installation and maintenance applications. Download free copy: http://www.get.agilent.com/vmx_link.cgi?site=wbu&code=87405c&ref=Press_TAO_87405CAppNote_Nov06_R