Anritsu Spectrum Master MS2720T, User Manual

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Spectrum Analyzer MG PN: 10580-00349 Rev. H 2-1
Chapter 2 — Spectrum Analyzer
2-1 Introduction
Spectrum analyzer measurements include the use of additional functions beyond frequency,
span, amplitude, and marker functions.
Section 2-2 and Section 2-3 explain setup procedures
and settings for making spectrum analyzer measurements. Section 2-4 through Section 2-8
focus on resolution bandwidth, video bandwidth, sweep, attenuator, and detection functions.
Section 2-11 through Section 2-24 cover field measurements including brief examples
demonstrating field strength, occupied bandwidth, channel power, adjacent channel power
ratio, EMF, out-of-band spurious emissions, in-band/out-of-channel, AM/FM/SSB
demodulation, masks and carrier to interference ratio (C/I), coverage mapping, and
IQ waveform capture. Finally,
Section 2-25 though Section 2-38 detail the submenus
available in Spectrum Analyzer mode.
2-2 General Measurement Setups
Refer to your instrument User Guide for instructions on setting up frequency, span,
amplitude, GPS, limit lines, markers, and file management.
2-3 Making Spectrum Analyzer Measurements
Required Equipment
• Optionally, an antenna that is appropriate for the frequency range to be measured
Required Setup
• Place the instrument in Spectrum Analyzer mode. Refer to “Selecting a Measurement
Mode” on page 1-1 .
• Connect the input signal or antenna to the
RF In
test port.
Setting Frequency
The tuning frequency range can be entered in several different ways depending upon what
makes the most sense, either for the user or for the application. The center frequency and
span can be specified, the start and stop frequencies can be entered, or a signal standard and
channel number can be selected from the built-in list.
Offset Frequency
In addition, a user-defined frequency offset can be entered to adjust the frequency that is
displayed on the instrument from the actual swept frequency. For example, if the DUT is an
antenna system receiving signals in the 10 GHz range and offsetting the signals to the 1 GHz
range, you can set a frequency offset in the spectrum analyzer in order to display the actual
received antenna frequency in the sweep window. For a measurement example, see
Figure 2-39 on page 2-54 .
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