Spectrum Analyzer MG PN: 10580-00349 Rev. H 3-1
Chapter 3 — Interference Analyzer
(Option 25)
3-1 Introduction
Many wireless networks operate in complex signal environments. Three or four base station
antennas may be located on the same tower and can create interference problems, which can
affect system capacity and coverage.
The Interference Analyzer (option 25) adds five measurement capabilities to the spectrum
analyzer:
• Section 3-4 “Spectrogram” on page 3-2
• Section 3-5 “Signal Strength” on page 3-4
• Section 3-6 “Received Signal Strength Indicator (RSSI)” on page 3-5
• Section 3-7 “Signal ID” on page 3-6
• Section 3-8 “Interference Mapping” on page 3-8
The instrument also has a spectrum mode which displays signals in a traditional spectrum
analyzer view.
3-2 General Measurement Setups
Refer to your instrument User Guide for instructions on setting up frequency, span,
amplitude, GPS, limit lines, markers, and file management.
3-3 Spectrum
In Spectrum Analyzer mode, smart one-button measurements are built-in for field strength,
occupied bandwidth, channel power, adjacent channel power ratio, and carrier to interference
ratio (C/I) tests. In addition, AM/FM/SSB demodulation is available to aid in the
identification of interfering signals. This section presents brief examples demonstrating the
use of these measurements.
Press the Measurements main menu key followed by the Spectrum submenu key. Refer to
“Field Measurements” on page 2-14 for further spectrum measurement procedures.
Note
Set the instrument to Interference Analyzer mode for all the measurements
described in this chapter. Refer to “Selecting a Measurement Mode” on page 1-1.
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