JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using Spectrum Analyzer
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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 JD780A 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)
Display overview
Figure 7 provides overview of each segment of the measurement screen.