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Chapter 4 Using Spectrum Analyzer
Introduction
The advantage of using the Spectrum Analyzer is easy to verify the presence of unwanted signals such as
spurious and harmonics, which are normally very hard to identify in time domain analysis.
Performance assurance in wireless communication systems includes the observation of the out-of-band
signal characteristics in order to identify the presence of harmonic signals. Harmonic signals of a carrier may
interfere with other signals far out of the transmission band, or harmonic signals from other transmitter may
interfere with in band signals affecting the spectral integrity.
In these days when wide variety of wireless communication services are provided in frequency bands
assigned very closely to each other, it is critical to ensure that each communication service is carried out
within their assigned frequency band minimizing interference with adjacent frequency bands. The Adjacent
Channel Power Ratio (ACPR) characteristic of a power amplifier or other RF components is an important
factor in evaluating the system performance.
The JD700B series is the optimal solution to perform following measurements:
Spectrum Analysis
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Spectrum
RF Analysis
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Channel Power
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Occupied Bandwidth
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Spectrum Emission Mask
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Adjacent Channel Power (ACP)
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Multi-ACP
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Spurious Emissions
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AM/FM Audio Demodulation
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Field Strength
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Route Map
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Dual Spectrum
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PIM Detection (Single and Multiple Carriers): not supported when 28 GHz downconverter is
connected.
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Total Harmonic Distortion (THD): not supported when 28 GHz downconverter is connected.
Display overview
Figure 15 provides overview of each segment of the measurement screen.
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JD700B Series User's Guide
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