Anritsu MS2840A User manual

Document No.: M-W3336AE-34.0
ANRITSU CORPORATION
●For safety and warning information, please read this
manual before attempting to use the equipment.
●
Additional safety and warning information is provided
within the MS2830A Signal Analyzer Operation Manual
(Mainframe Operation)
，
MS2840A Signal Analyzer
Operation Manual (Mainframe Operation) or MS2850A
Signal Analyzer Operation Manual (Mainframe
Operation). Please also refer to this document before
using the equipment.
●
Keep this manual with the equipment.
MS2830A/MS2840A/MS2850A
Signal Analyzer
Operation Manual
Spectrum Analyzer Function
Operation
34th Edition

ii
Safety Symbols
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Corporation uses the
following safety symbols to indicate safety-related information. Ensure that you clearly understand the meanings of
the symbols BEFORE using the equipment. Some or all of the following symbols may be used on all Anritsu
equipment. In addition, there may be other labels attached to products that are not shown in the diagrams in this
manual.
Symbols used in manual
This indicates a very dangerous procedure that could result in serious injury or
death if not performed properly.
This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
This indicates a hazardous procedure or danger that could result in light-to-severe
injury, or loss related to equipment malfunction, if proper precautions are not taken.
Safety Symbols Used on Equipment and in Manual
The following safety symbols are used inside or on the equipment near operation locations to provide information
about safety items and operation precautions. Ensure that you clearly understand the meanings of the symbols and
take the necessary precautions BEFORE using the equipment.
This indicates a prohibited operation. The prohibited operation is indicated
symbolically in or near the barred circle.
This indicates an obligatory safety precaution. The obligatory operation is indicated
symbolically in or near the circle.
This indicates a warning or caution. The contents are indicated symbolically in or
near the triangle.
This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled.
MS2830A/MS2840A/MS2850A
Signal Analyzer
Operation Manual Spectrum Analyzer Function Operation
15 December 2009 (First Edition)
19 July 2017 (34th Edition)
Copyright © 2009-2017, ANRITSU CORPORATION.
All rights reserved. No part of this manual may be reproduced without the prior written permission of the
publisher.
The contents of this manual may be changed without prior notice.
Printed in Japan
DANGER
WARNING
CAUTION

iii
Notes On Export Management
This product and its manuals may require an Export License/Approval by
the Government of the product's country of origin for
re-
export from your
country.
Before re
-
exporting the product or manuals, please contact us to confirm
whether they are export
-controlled items or not.
When you dispose of export
-
controlled items, the products/manuals need to
be broken/shredded so as not to be unlawfully used for military purpose.
Cautions against computer virus infection
●
Copying files and data
Only files that have been provided direct
ly from Anritsu or generated
using Anritsu equipment should be copied to the instrument.
All other required files should be transferred by means of USB or
CompactFlash media after undergoing a thorough virus check.
●
Adding software
Do not download or install software that has not been specifically
recommended or licensed by Anritsu.
●
Network connections
Ensure that the network has sufficient anti-
virus security protection in
place.

iv

I
About This Manual
Operation manual configuration
The operation manual configuration of the MS2830A, MS2840A, and
MS2850A Signal Analyzer is shown below.
MS2690A/MS2691A/MS2692A and MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual (Phase Noise Measurement Function Operation)
MS2690A/MS2691A/MS2692A and MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual (Phase Noise Measurement Function Remote Control)
MS2690A/MS2691A/MS2692A
Signal Analyzer Operation Manual
(Signal Analyzer Function Operation)
MS2690A/MS2691A/MS2692A and MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual (Signal Analyzer Function Remote Control)
MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual
(Signal Analyzer Function Operation)
Or
MS2690A/MS2691A/MS2692A
Spectrum Analyzer Operation Manual
(Spectrum Analyzer Function Operation)
MS2690A/MS2691A/MS2692A and MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual (Spectrum Analyzer Function Remote Control)
MS2830A/MS2840A/MS2850A
Spectrum Analyzer Operation Manual
(Spectrum Analyzer Function Operation)
Or
MS2690A/MS2691A/MS2692A Signal Analyzer Operation Manual
(Main Frame Operation)
MS2690A/MS2691A/MS2692A and MS2830A/MS2840A/MS2850A
Signal Analyzer Operation Manual (Main Frame Remote Control)
MS2840A Signal Analyzer Operation Manual (Main Frame Operation)
Or
MS2830A Signal Analyzer Operation Manual (Main Frame Operation)
MS2850A Signal Analyzer Operation Manual (Main Frame Operation)

II
•Signal Analyzer Operation Manual (Mainframe Operation)
•Signal Analyzer Operation Manual (Mainframe Remote Control)
Description of basic operations, maintenance procedures, common
functions and common remote functions of the mainframe
•Signal Analyzer Operation Manual (Signal Analyzer Function Operation)
•Signal Analyzer Operation Manual (Signal Analyzer Function Remote
Control)
Description of basic operations, functions and remote functions of the
signal analyzer
•Signal Analyzer Operation Manual (Spectrum Analyzer Function
Operation) <This document>
•Signal Analyzer Operation Manual (Spectrum Analyzer Function Remote
Control)
Description of basic operations, functions and remote functions of the
spectrum analyzer
•Signal Analyzer Operation Manual (Phase Noise Measurement Function)
•Signal Analyzer Operation Manual (Phase Noise Measurement Function
Remote Control)
Description of basic operations, common functions and common
remote functions of the Phase Noise Measurement function
Convention Used in This Manual
Throughout this document, the use of MS2830A is assumed unless
otherwise specified. If using MS2840A or MS2850A, change MS2830A to
read MS2840A or MS2850A.
In this document, indicates a panel key.

1
Index
III
2
3
4
5
6
7
9
Appendix
8
Table of Contents
Overview ........................................... 1-1 Chapter 1
1.1 Overview of Spectrum Analyzer ................................... 1-2
1.2 Features of Spectrum Analyzer .................................... 1-3
Chapter 2 Basic Operation................................ 2-1
2.1 Display Description ....................................................... 2-2
2.2 Single/Continuous Sweep............................................. 2-4
2.3 Setting Frequency......................................................... 2-5
2.4 Setting Level ............................................................... 2-22
2.5 Setting RBW/VBW ...................................................... 2-38
Display Mode Selection ................... 3-1 Chapter 3
3.1 Setting Storage Mode ................................................... 3-2
3.2 Setting Limit Line ........................................................ 3-10
3.3 Setting Normalize Function......................................... 3-28
3.4 Setting Math Function................................................. 3-31
3.5 Setting Time/Sweep.................................................... 3-32
3.6 Save on Event............................................................. 3-37
Marker Function ............................... 4-1 Chapter 4
4.1 Setting Marker............................................................... 4-2
4.2 Setting Peak Search Function .................................... 4-13
4.3 Displaying Marker List ................................................ 4-23
Trigger Function and Gate Function5-1 Chapter 5
5.1 Setting Trigger Function ............................................... 5-2
5.2 Setting Gate Function ................................................. 5-10

IV
Measure Function ............................ 6-1 Chapter 6
6.1 Selecting Measure Function ......................................... 6-2
6.2 Adjacent Channel Leakage Power Measurement
(ACP) ............................................................................ 6-4
6.3 Burst Average Power Measurement........................... 6-12
6.4 Channel Power Measurement (Channel Power) ........ 6-14
6.5 Occupied Bandwidth Measurement
(Occupied Bandwidth) ................................................ 6-16
6.6 Spectrum Emission Mask Measurement
(Spectrum Emission Mask)......................................... 6-18
6.7 Spurious Emission Measurement............................... 6-28
6.8 Two-tone Third Order Intermodulation Distortion ....... 6-42
6.9 Internal Signal Generator Control Function ................ 6-46
Other Functions ............................... 7-1 Chapter 7
7.1 Selecting Other Function .............................................. 7-2
7.2 Setting Title ................................................................... 7-3
7.3 Erasing Warmup Message ........................................... 7-4
7.4 Setting Uncal Message................................................. 7-5
7.5 Adjusting Internal Reference Frequency Signal ........... 7-6
7.6 Input Source for Reference Frequency Signal ............. 7-7
7.7 Pre-Amp On/Off Display ............................................... 7-8
7.8 Preselector Tuning........................................................ 7-9
External Mixer................................... 8-1 Chapter 8
8.1 External Mixer Overview............................................... 8-2
8.2 External Mixer ............................................................... 8-3
8.3 Connecting External Mixer............................................ 8-8
8.4 Setting Band of External Mixer ..................................... 8-9
8.5 Setting External Mixer Bias......................................... 8-11
8.6 Setting Conversion Loss............................................. 8-12
8.7 Distinguishing measured signal - Signal ID ................ 8-15
8.8 Setting Signal ID Mode ............................................... 8-17
8.9 Setting PS Function .................................................... 8-18
8.10 Setting External Mixer Cable Loss.............................. 8-19
8.11 External Mixer Calibration Function............................ 8-22

1
Index
V
2
3
4
5
6
7
9
Appendix
8
Noise Floor Reduction..................... 9-1 Chapter 9
9.1 Overview of Noise Floor Reduction .............................. 9-2
9.2 Noise Floor Reduction .................................................. 9-3
9.3 Acquiring Noise Floor Calibration Values ..................... 9-5
9.4 Using Noise Floor Reduction........................................ 9-8
9.5 Displaying Information of Noise Floor Calibration ........ 9-9
Appendix A Specifications .............................. A-1
Appendix B MS2830A Default Value List........ B-1
Appendix C MS2840A Default Value List........ C-1
Appendix D MS2850A Default Value List........ D-1
Appendix E Standard Parameter List ..............E-1
Index ..................................................Index-1

VI.

1-1
1
Overview
Overview
Chapter 1
This chapter provides an overview of the Spectrum Analyzer function.
1.1 Overview of Spectrum Analyzer ...................................1-2
1.2 Features of Spectrum Analyzer....................................1-3

Chapter 1 Overview
1-2
1.1 Overview of Spectrum Analyzer
The MS2830A, MS2840A, MS2850A Signal Analyzer is a spectrum
analyzer to which options such as real-time signal analysis and vector
modulation analysis can be added.
The spectrum analyzer function (hereinafter “this application”) enables
high-speed and high-accuracy signal processing of wide-ranging analyses
at full-span, a characteristic of conventional sweep-type spectrum
analyzers, using a digital IF block. It can be used in a variety of
applications from research and development to manufacturing thanks to
its characteristics.
The Spectrum Analyzer function has the following features.
●Frequency band
MS2830A: 3.6 GHz/6 GHz/13.5 GHz/26.5 GHz/43 GHz
MS2840A: 3.6 GHz/6 GHz/26.5 GHz/44.5 GHz
MS2850A: 32 GHz/44.5 GHz
●High dynamic range
●High-speed measurement
●High-speed and high-accuracy signal analysis through digital IF
●Rich measurement functions

1.2 Features of Spectrum Analyzer
1-3
1
Overview
1.2 Features of Spectrum Analyzer
A spectrum analyzer is a measuring device for analyzing the frequency
components of an input signal. The relative values of the various
frequency components are displayed in graph form, with the horizontal
axis representing the frequency and the vertical axis the signal level.
Figure 1.2-1 shows a schematic representation of a signal that includes a
harmonic distortion component as observed with an oscilloscope and a
spectrum analyzer. Observation of a signal that includes harmonic
components with an oscilloscope yields a waveform with distortion, not a
sine wave. This indicates that the signal includes harmonic components,
but the magnitudes of the various harmonic components cannot be
quantitatively measured. Using a spectrum analyzer enables the
quantitative grasp of signal components by dividing the signal
components into their various frequency components and graphing each
frequency and amplitude. In the example shown in Figure 1.2-1, the
signal can be seen to consist of a fundamental wave (f0) and a second
harmonic component (2 ×f0), and their respective amplitudes can be read
from this figure.
Figure 1.2-1 Comparison of spectrum analyzer and oscilloscope
Spectrum analyzer principle
A spectrum analyzer separates the input signal down to the level of
single frequencies and obtains their respective amplitudes. Concretely,
following extraction of single frequencies using a narrow-band filter(s),
their amplitudes are obtained through wave detection. Separation into
the various signal components through the use of a filter(s) can be done
using two different methods. One method consists in using multiple
filters to obtain the various frequency components in one time (real-time
method), while the other method consists in obtaining the various
frequency components by changing the center frequency of a single filter
over time (sweep method).
2f
0
f
0
Spectrum analyzer
waveform
Oscilloscope waveform
Frequency
Time
Amplitude

Chapter 1 Overview
1-4
The real-time method, which is characterized by a small time lag, is
suitable for measurement in a narrow frequency range of several tens of
MHz maximum. Compared to the real-time method, the sweep method
requires a long time to draw a screen, but since it allows observation of a
wide frequency range on the order of several GHz at one time, it is a
powerful method for high-order harmonic level measurement and the
detection of unknown frequency components.
Figure 1.2-2 Spectrum analyzer principle
Figure 1.2-3 Configuration of typical sweep-type spectrum analyzer
Attenuator
Pre-selector
Mixer
Local oscillator
Sweep signal
generator
IF amp.
IF filter
Logarithmic
amp.
Wave
detector
Video filter
Display
Y axis
X axis
RF input
Frequency-variable
knob
Input signal
Input signal
Sweep-type spectrum analyzer
Real-time-type spectrum analyzer
Bandpass filter
(Waveform-variable)
bandpass filter
Display device
Display device

1.2 Features of Spectrum Analyzer
1-5
1
Overview
Figure 1.2-3 shows the configuration of a typical sweep-type spectrum
analyzer. The super heterodyne method, which is one of the methods that
can be used for implementing a sweep-type spectrum analyzer, is
described below. The input signal from external sources passes through
an input circuit consisting of an attenuator and a preselector and is
mixed with the signal from the local oscillator by a mixer. Here, the input
signal is converted into a signal of a given frequency (IF). After being
processed through an IF stage, this IF signal determines the vertical axis
(level) on the display based on its level. The local oscillator, which
operates on the principle that the oscillation voltage changes according to
the input voltage, is controlled by the signal from the sweep signal
generator (sawtooth wave generator) and determines the horizontal axis
(frequency) of the display. As a result, a level that corresponds to the
input frequency is displayed as a graph.
The input circuit consists of an attenuator for input signal level
adjustment, and a pre-selector that prevents erroneous measurement by
reducing responses other than that of the reception signal. The IF stage
consists of an IF filter used to separate only the target frequency, an IF
amplifier with a gain stabilized across a wide level range, and a
logarithmic amplifier with excellent linearity. The MS2830A, MS2840A,
MS2850A employs a digital IF method in its IF stage to obtain superior
linearity and selectivity.

Chapter 1 Overview
1-6.

2-1
2
Basic Operation
Chapter 2
Basic Operation
This chapter describes the basic operation of the Spectrum Analyzer
function.
2.1 Display Description ....................................................... 2-2
2.2 Single/Continuous Sweep............................................. 2-4
2.3 Setting Frequency......................................................... 2-5
2.3.1 Setting center frequency ................................ 2-10
2.3.2 Setting frequency span................................... 2-11
2.3.3 Setting start frequency.................................... 2-12
2.3.4 Setting stop frequency.................................... 2-12
2.3.5 Setting frequency offset.................................. 2-14
2.3.6 Changing frequency band .............................. 2-14
2.3.7 Setting Whether To
Couple Time Domain Parameters and
Frequency Domain Parameters ..................... 2-15
2.3.8 Switching Speed............................................. 2-16
2.3.9 Setting step size ............................................. 2-17
2.3.10 Low Phase Noise............................................ 2-18
2.3.11 Displaying the Spurious Mode icon................ 2-21
2.4 Setting Level ............................................................... 2-22
2.4.1 Setting reference level.................................... 2-28
2.4.2 Setting input attenuator .................................. 2-29
2.4.3 Setting scale ................................................... 2-33
2.4.4 Setting reference level unit............................. 2-35
2.4.5 Setting reference level offset.......................... 2-36
2.4.6 Pre-amp.......................................................... 2-37
2.4.7 Setting impedance.......................................... 2-37
2.5 Setting RBW/VBW ...................................................... 2-38
2.5.1 Setting resolution bandwidth (RBW) .............. 2-40
2.5.2 Setting video bandwidth (VBW)...................... 2-41
2.5.3 Setting Video VBW/Power VBW .................... 2-42
2.5.4 Setting SPAN:RBW Ratio............................... 2-43
2.5.5 Setting CISPR resolution bandwidth (RBW) .. 2-44

Chapter 2 Basic Operation
2-2
2.1 Display Description
This section describes the main screen and main function menus of the
Spectrum Analyzer function.
Figure 2.1-1 Main screen of Spectrum Analyzer function

2.1 Display Description
2-3
2
Basic Operation
Pressing the when the Spectrum Analyzer function is selected in the
Application Switch menu displays the main function menu.
The main function menu consists of two pages, which can be toggled by
pressing .
Table 2.1-1 Main function menu
Function
Key Menu Display Function
Page1 Spectrum Analyzer Press Spectrum Analyzer to display this page.
F1 Frequency
Executes frequency setting and preselector auto
tuning.
2.3 “Setting Frequency”
F2 Span Sets the frequency span and frequency band.
2.3 “Setting Frequency”
F3 Amplitude Sets the level.
2.4 “Setting Level”
F4 BW
Sets the resolution bandwidth and video
bandwidth.
2.5 “Setting RBW/VBW”
F5 Marker Sets markers.
4.1 “Setting Marker”
F6 Trace Sets the trace.
3.1 “Setting Storage Mode”
F7 Trigger/Gate
Sets the trigger and gate.
Chapter 5 “Trigger Function and Gate
Function”
F8 Time/Sweep Sets the sweep time and trace points.
3.3 “Setting Time/Sweep”
Page2 Spectrum Analyzer Press Spectrum Analyzer and then press to
display page 2.
F1 Peak Search Sets the peak search execution and conditions.
4.2 “Setting Peak Search Function”
F2 Measure
Configures settings related to the Measure
function.
Chapter 6 “Measure Function”
F7 Save on Event
Sets the Save on Event function that saves
Trace data upon occurrence of an event.
3.4 “Save on Event”
F8 Accessory Sets the other functions.
Chapter 7 “Other Functions”

Chapter 2 Basic Operation
2-4
2.2 Single/Continuous Sweep
There are two types of sweep, single and continuous.
(1) Single sweep
Press to execute sweep once. When the trigger function or gate
function is on, only 1 sweep is executed when the sweep start conditions
are met.
(2) Continuous sweep
Press to execute continuous sweep. When the trigger function or
gate function is on, sweep is executed every time the sweep start
conditions are met.
Figure 2.2-1 Single key and Continuous key