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Spectrum Analysis Basics - Application Note
This application note (also known as AN 150) explains the fundamentals of swept-tuned, superheterodyne spectrum analyzers and discusses the latest advances in spectrum analyzer capabilities.

Application Note 2014-02-25

Measuring the Dependence of Optical Amplifiers on Input Power Using an Attenuator
This application note describes the important optical amplifier properties of gain and noise figures and their dependence on the powers and wavelengths of the input signals.

Application Note 2002-03-11

PDF PDF 260 KB
Spectrum Analysis: Amplitude and Frequency Modulation (AN 150-1) - Application Note
Modulation is the act of translating some low-frequency or base-band signal (voice, music, data) to a higher frequency. Why do we modulate signals? There are at least two reasons: to allow the simultaneous transmission of two or more baseband signals by translating them to different frequencies...

Application Note 2001-10-01

PDF PDF 1.08 MB
Variable Optical Attenuator in BER Test Applications
This application note will help users of optical attenuators to understand the key features of Keysight’s new attenuator family.

Application Note 2001-08-23

WDM System Test with the Keysight 86120 Multi-Wavelength Meter ( PN 86120-1)
This product note addresses the WDM system, the design and maintenance issues warranting measurement, and how the Keysight 86120 Multi-Wavelength Meter can be used to easily...

Application Note 2000-08-01

PDF PDF 435 KB
Lightwave Signal Analyzers Measure Relative Intensity Noise (PN 71400-1)
This product note describes techniques to measure laser intensity noise with the Keysight 714000C and 71410C lightwave signal analyzers. It includes RIN examples and measurements.

Application Note 2000-07-01

PDF PDF 417 KB