The HP Agilent ESA-E Series of Spectrum Analyzers have frequency ranges from 9 kHz to 26.5 GHz, depending on the model. These Spectrum Analyzers can perform measurements such as: Noise Figure, cdmaOne, GSM/EDGE, Phase Noise, and many more. The ESA-E Series can be configured to suit the user’s application with its many options that can be added at purchase or in the future. These options include: digital demodulation communication hardware, a battery pack/ 12 VDC operation, an external mixing capability to 325 GHz, a high stability frequency reference, quick time-domain sweeps to 50 ns, a pre-amplifier, and numerous others.