Saluki Technology S3302A, S3302D, S3302B, S3302C Datasheet

S3302 Series Handheld Spectrum Analyzer

Datasheet

Saluki Technology Inc.

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The document applies to the handheld spectrum analyzers of the following models:

 S3302A handheld spectrum analyzer (9kHz-20GHz).
 S3302B handheld spectrum analyzer (9kHz-26.5GHz).
 S3302C handheld spectrum analyzer (9kHz-32GHz).
 S3302D handheld spectrum analyzer (9kHz-44GHz).

Standard pack and accessories:

No. Item

1 Main Machine

2 Power cord

3 Power adapter

4 Quick start manual

5 USB cable

6 Battery

Options of the S3302 series handheld spectrum anal yz er in addition to standard accessories:

Model No. Description Note

S3302-05 Programming manual

S3302-06 Power Adapter

S3302-07 Backup battery

S3302-08 CAT5 LAN Cable

S3302-09 Micro SD card

S3302-10 GPS antenna

S3302-11 USB power measurement function Need option 12-15

S3302-12 SAV87230 USB power continuous wave power sensor (9kHz - 6GHz) Need option 11

S3302-13 SAV87231 USB power continuous wave power sensor (10MHz - 18GHz) Need option 11

S3302-14 SAV87232 USB power continuous wave power sensor (50MHz - 26.5GHz) Need option 11

S3302-15 SAV87233 USB power continuous wave power sensor (50MHz - 40GHz) Need option 11

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Model No. Description Note

S3302-16 Interference analysis function Waterfall, RSSI

S3302-17 Analog demodulation function

AM/FM/PM demodulation function, used for displaying the
spectrum of AM, FM and PM signals and analyzing relevant
parameters e.g. carrier power, modulation rate, carrier offset,
modulation depth (AM), modulation frequency offset (FM),

modulation phase deviation (PM), S/N, modulation distortion and

total harmonic distortion of the modulated signal.

S3302-18 Channel scan function Power measurement for multiple channels or frequency points.

S3302-19 List sweep function

S3302-20 Zero span IF output

Output the third(3rd.) IF(140.25MHz) or fourth(4th.)
IF(31.25MHz) signal

S3302-21 SAV89101A antenna (10kHz - 20MHz)

S3302-22 SAV89101B antenna (20MHz - 200MHz)

S3302-23 SAV89101C antenna (200MHz - 500MHz)

S3302-24 SAV89101D antenna (500MHz - 4GHz)

S3302-25

SAV89401 antenna amplifier (10kHz - 4GHz，N(f))

Need option 21/22/23/24

S3302-26 SAV89901 antenna (1GHz - 18GHz , N(f) )

S3302-27

SAV89902 antenna (18GHz - 40GHz, 2.4mm(f))

S3302-28 Functional Bag

S3302-29 Backpack

S3302-30 Carrying case

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Preface

Thank you for choosing S3302 handheld spectrum analyzer produced by Saluki Technology Inc.
We devote ourselves to meeting your demands, providing you high-quality measuring instrument and the best

after-sales service. We persist with “superior quality and considerate service”, and are committed to offering
satisfactory products and service for our clients.

Document No.

S3302-03-01

Version

Rev01 2017.8
Saluki Technology

Document Authorization

The information contained in this document is subject to change without notice. The power to interpret the contents
of and terms used in this document rests with Saluki.

Saluki Tech owns the copyright of this document which should not be modified or tampered by any organization or
individual, or reproduced or transmitted for the purpose of making profit without its prior permission, otherwise
Saluki will reserve the right to investigate and affix legal liability of infringement.

Product Quality Assurance

The warranty period of the product is 36 months from the date of delivery. The instrument manufacturer will repair
or replace damaged parts according to the actual situation within the warranty period.

Product Quality Certificate

The product meets the indicator requirements of the document at the time of delivery. Calibration and measurement
are completed by the measuring organization with qualifications specified by the state, and relevant data are
provided for reference.

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Contacts

Service Tel: [phone]
Website: www.salukitec.com
Email: [e-mail]
Address: No. 367 Fuxing N Road, Taipei 105，Taiwan (R.O.C.)

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Content

Chapter I Overview 8

Section 1 Product Overview 9

Chapter II Operation Guide 12

Section 1 Unpacking Inspection 12
Section 2 Safety Instructions 13
Section 3 Battery Installation and Replacement 16
Section 4 User Inspection 18

Chapter III Basic Operation 19

Section 1 Description of front panel 19
Section 2 Interface Description 25

Chapter IV Spectrum Analysis Mode 28

Section 1 Introduction to Typical Measurements 30
Section 2 Structure of Spectrum Analysis Menu 64
Section 3 Description of “Spectrum Analysis” Menu 69

Chapter V Interference Analyzer Measurement Mode (optional) 97

Section 1 Introduction to Typical Measurements 97
Section 2 Structure of Interference An al yz er Menu 101
Section 3 Description of Interference Analyzer Menu 103

Chapter VI Power Meter Mode (optional) 114

Section 1 Introduction to Typical Measurements 114
Section 2 Structure of Power Meter Menu 117
Section 3 Description of Power Meter Menu 118

Chapter VII AM-FM-PM Analyzer Mode (optional) 122

Section 1 Introduction to Typical Measurements 122
Section 2 Structure of AM-FM-PM analyzer Menu 125
Section 3 Description of AM-FM-PM Analyzer Menu 127

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Chapter VIII Channel Scanner Mode (optional) 135

Section 1 Introduction to Typical Measurements 135
Section 2 Structure of Channel Scanner Menu 139

Section 3 Description of Channel Scanner Menu 140

Chapter IX Field Strength Measurement Mode (optional) 144

Section 1 Introduction to Typical Measurements 144
Section 2 Structure of Field Strength Menu 148
Section 3 Description of Field Strength Menu 150

Chapter X Operating Principle 157
Chapter XII Troubleshooting and Repair 159

Section 1 Fault Information Description 159
Section 2 Repair Method 160

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Chapter I Overview

Saluki S3302 series handheld spectrum analyzer is a high end handheld instrument, It provides multi-function which
includes spectrum analysis, interference analysis, analog demodulation,power measurement, channel scan function,
channel power etc. S3302 also provide a easy-to-use functions like occupied bandw idt h, adjacent channel power ,
audio demodulation, noise-carrier ratio measurement. S3302 is equipped with 8.4-inch integrated LCD touch screen
improves display clarity and ease of oper ati on . S3302 is a hand-held, small size, light weight, easy to take so it is
very suitable for on-site measurement.

Saluki S3302 series handheld spectrum analyzer can be applied to the signal and equipment test in aerospace,
microwave and satellite communications, wireless communications, radar surveillance, electronic warfare and
electronic surveillance, precision-guided and other industries.

The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its
meaning before operating this instrument.

“Warning” indicates danger. It reminds the user to pay attention to a certain operation process, operation method or similar situations. Noncompliance with
the rules or improper operation may result in personal injuries. You shall fully understand and meet all the conditions in the warning before proceeding to the
next step.

“Attention” indicates important prompts and no danger. It reminds the user to pay attention to a certain operation process, operation method or similar
situations. Noncompliance with the rules or improper operations may result in damage to the instrument or loss of important data. You shall fully understand
and meet all the conditions in the caution before proceeding to the next step.

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Section 1 Product Overview

1 Brief Introduction

S3302 series spectrum analyzer has the advantages of broad operating band, high performance indicators, high
sweeping speed, multiple test functions, easy operation, etc. From the perspective of performance indicators, this
instrument has low average noise level, low phase noise and high scanning speed. From the perspective of
measurement functions, this instrument has various measurement modes such as spectrum analysis, interference
analysis, analog demodulation, power measurement, channel scanning and field strength measurement and
various intelligent measurement functions such as the channel power, occupied bandwidth, adjacent channel power,
tune listening, emission mask and C/N. Due to integration of the 8.4-inch LCD and c apaci ti ve t ouc h scr ee n, t he
display definition and operational convenience are improved. This instrument has a small and light structure, and
can be flexibly powered up and easily operation. Therefore, this instrument is applicable to field operation. The
appearance is shown in Fig. 1-1.

Fig. 1-1 S3302 Series Spectrum Analyzer

2 Product features

Based on the highly integrated, modular and standardized design, S3302 series spectrum analyzer has excellent
performance, with main characteristics as follows:

 Broad frequency coverage: 4 models from 9kHz to 44GHz;
 Low average noise level: -157dBm@1Hz RBW;
 Excell ent phase noise performance: -106dBc/Hz@100kHz; offset: @1GHz carrier;
 High sweeping speed: Minimum sweeping time within 1GHz span: <20ms;

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 Resolution bandwidth: 1Hz~10MHz;

 Full-band pre-amplifier: Standard configuration;

 Various measurement modes: Spectrum analysis, interference analysis (spectrogram and RSSI), analog

demodulation (AM/FM/PM), channel scanning, high-precision USB power measurement, field strength
measurement, etc.

 Various intelligent measurement functions: Field strength measurement, channel power, occupied bandwidth,

adjacent channel power, audio demodulation, carrier-noise ratio, emission mask, IQ capture, etc.

 Various auxi l i ary test interfaces: 10MHz reference input/output interface, GPS antenna interface, zero-span IF

output interface, external trigger input interface, etc.

 Convenient and fast user operation experience: 8.4-inch large-screen high-brightness LCD, large-font display,

convenient capacitive touch screen, LCD and touch screen integration, various display modes, automatic
adjustment of backlight brightness, etc.

 Operating temperature range: -10°C to 50°C This instrument can be powered up with the battery or adapter.

3 Functions

S3302 series spectrum analyzer has a wide range of measurement functions, mainly including:
 Spectrum analysis, used for basic spectrum analysis of signals, including various intelligent measurement

functions such as the field strength measurement, channel power, occupied bandwidth, adjacent channel
power, emission mask, carrier-noise ratio, audio demodulation and IQ capture;

 Listing scanning (optional), used for continuous scanning measurement of multiple bands;
 Interference analysis (optional), including spectrogram and RSSI measurement;
 Analog demodulation, used for analysis of modulation characteristics of AM/FM/PM signals;
 Power measurement, used for high-precision power measurement of the USB interface;
 Channel scanning (optional), used for signal power measurement of multiple channels or frequencies;
 Field strength measurement (optional), used for CW measurement, frequency scanning measurement and list

scanning measurement;

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 GPS positioning (optional), realized with the external GPS antenna;
 Zero-span IF output (optional), used for output of the third or fourth IF signal through the IF output interface under

zero span.

4 Typical application

 ■On-site comprehensive performance evaluation of electronic weapon equipment
S3302 series spectrum analyzer has the advantages of br oad op er ati ng band, high performance indic ator s, high

sweeping speed, multiple test functions, easy operation, etc. In addition, this handheld instrument is small and light
and can be powered up with the battery. Therefore, this instrument can be applied in on-site
installation/commissioning and maintenance/guarantee of various kinds of electronic weapon equipment such as
the radar, communication, electronic countermeasures and reconnaissance and precision guidance.

 ■ On-site testing and diagnosis of transmitter and receiver
S3302 series spectrum analyzer has various measurement modes such as the spectrum analysis, interference

analysis, analog demodulation, power measurement, channel scanning and field strength measurement, and
various intelligent measurement functions such as the channel power, occupied bandwidth, adjacent channel power,
C/N, field strength and emission mask. Therefore, it can be used for comprehensive spectrum analysis and
diagnosis services in on-site testing of transmitters and receivers.

 ■ Broadband spectrum monitoring and interference identification
S3302 series spectrum analyzer can be applied with the external directional antenna in electromagnetic

environment detection, radio interference analysis, electromagnetic environment background evaluation, spectrum
monitoring, identification of illegal channel interference signals, etc.

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Chapter II Operation Guide

Section 1 Unpacking Inspection

1 Model confirmation

You’ll find the following items after unpacking the carton:

a) S3302 Series Spectrum Analyzer 1 pcs
b) Power adapter 1
c) Three-core power line 1 pcs
d) Quick Operation Guide 1
e) USB cable 1 pcs
f) Built-in rechargeable lithium ion battery 1
g) Product certificate 1
h) Options Severl
i) Packing list 1

Please check the articles above against the order contract and packing list. If you have any questions, please
contact us in line with the contact information in Preface or contact the business center of the SALUKI, we'll tackle
problems as soon as possible.

The instrument is a kind of valuable device and should be handled with care.

2 Appearance inspection

Check if instrument is damaged during transportation, if any obvious damage is detected, don't power it up. Contact
our business center according to the contact information in the foreword. We'll repair or replace the instrument
immediately depending on the situation.

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Section 2 Safety Instructions

The safety performance of S3302 series spectrum analyzer complies with the requirements of GJB3947A-2009.
This instrument contains no part to be operated by the user. The instrument shell must not be opened without
permission; otherwise, personal injury may be caused. In order to protect your safety and properly operate this
instrument, please care ful ly the following safety instruments before operation.

1 Environmental requirements

In order to guarantee the service life and measurement validity and accuracy, S3302 series should be tested under
the following environme ntal condi ti o ns .

 Temperature range:

Storage temperature range: -40°C to +70°C
Operating temperature range: -10°C to +50°C

As the battery storage temperature range is -20°C to 60°C, the battery must not work continuously in a long time at high temperature, so as to avoid risks
arising from high temperature. It is recommended to use the adapter to supply power.

 Low air pressure:

Low air pressure (altitude): 0-4600m

2 Selection of power line

S3302 series spectrum analyzer is equipped with the three-core power line conforming to international safety
standards. The power line should be inserted into the appropriate power socket with the protective ground wire so
as to make the instrument shell grounded during operation. It is recommended to use the power line provided with
this instrument. The power line should be replaced with one 250V/10A power line of the same type.

3 Power supply requirements

S3302 series can be powered up in three methods:

 AC power supply and power supply with adapter

The accompanying AC-DC adapter must be used for AC power supply. The adapter input should be 100-240V
50/60Hz AC power.

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The AC-DC adapter must not be connected to the test instrument in order to prevent the instrument from
overheating when transported and carried with a knapsack. The voltage input range of the AC-DC adapter is
relatively wide, so you must ensure that the power voltage is within the range specified in Table 2-1 during
operation.

The working voltage and frequency ranges are subject to the parameters provided on the nameplate of the power adapter.

Table 2-1 Power Supply Requirements

Power supply parameter Applicable range

Input voltage
Rated input currency
Work frequency
Output Voltage/Current

100V-240VAC

1.7A
50/60Hz

15.0V/4.0A

 DC power supply
Voltage: 15V
Current: 3A (min.)
 Power supply with built-in battery

S3302 series instruments can be powered up with the rechargeable lithium ion battery. The battery will discharge if
it is not used for a long time. Therefore, the battery must be recharged before use. Refer to Section 3 for battery
operation details. Basic parameters of accompanying battery are as follows:

 Nominal voltage: 10.8V
 Nominal capacity: ≥7000mAh

The rechargeable battery must not be exposed to fire or high-temperature environments (above 70°C), or placed in fresh water or salt water, or made wet. It
must be kept away from children.

The rechargeable battery is reusable and should be stored in proper container to avoid short circuit. Heavy metals such as nickel and chromium in the battery
can pollute natural environment. Waste battery shall not be discarded but shall be put into a special battery recycle box.

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4 Electrostatic protection (ESD)

Static electricity is highly destructive to electronic components and equipment, so this instrument must be powered
up on the anti-static table. Attention should be paid to electrostatic protection when using the device. If condition
permits, the following electrostatic protection measures may be taken:

a) Make sure all the instruments are correctly grounded to prevent static generation.
b) The staff must wear anti-static wrist straps before contact with connectors or core wires or any assembly.
c) The center conductor must be grounded before the cable is connected to the instrument in the test. This can be

realized through the following steps: Connect a short-circuiter to one end of the cable to realize short circuit
between the central conductor and outer conductor of the cable. When wearing a anti-static wrist band, hold
on to the casing of the cable connector and connect the casing to the other end of the cable before removing
the short-circuiter.

5 Input/output port protection

The standard impedance of the RF port of S3302 series spectrum analyzer is 50Ω. Therefore, the appropriate load
impedance for the test signal or port should be applied in strict accordance with the port requirements during
operation, so as to prevent subsequent circuits from damage.

6 Cleaning of display of front panel

If required after operation of certain time, the display panel of the instrument can be cleaned according to the
following steps.

a) Shut down the instrument and disconnect the power line.
b) Wipe display panel with clean and soft cotton cloth with detergent.
c) Dry display panel with clean and soft cotton cloth.
d) Do not connect power line until detergent dries out.

The RF input end of the spectrum analyzer has the requirements for maximum allowable input level. The ap plied signal must not exceed the limits; otherwise,
this instrument may be damaged.

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There is anti-static coating on display surface, do not use fluoride -bearing detergent or acidic/alkaline detergent. Do not spray detergent on display panel
directly, otherwise it may penetrate into and damage the instrument.

Section 3 Battery Installation and Replacement

1 Battery description

S3302 series spectrum analyzer is equipped with one large-capacity rechargeable lithium ion battery, with the
endurance of about 2.5h. In order to facilitate the long-time field test and prevent the test interruption caused by
insufficient battery capacity, the user may purchase the standby battery. It is recommended to purchase one of the
same model as that provided along with the instrument.

To guarantee service life of the battery, the battery should be removed from battery holder during the transportation and long-time storage.

2 Battery installation and replacement

The battery of S3302 series spectrum analyzer can be installed or replaced easily. The user may install or replace it
according to the requirements in Fig. 2-1.

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Fig. 2-1Battery Installation and Replacement Steps

3 Battery status check

S3302 series spectrum analyzer is provided with one battery, of which the standby time is 2.5h under full-capacity
conditions.

The user can view the battery status in the following methods:

 Observe the battery icon on the system status bar to roughly know the battery capacity. If only 15% exists

in the battery icon, replace or charge the battery promptly.

 Take out the battery and press the button on the white point at the tail end of the battery. Then the

indicator above the button will be ON, showing the current residual capacity. If only one indicator is ON,
the battery should be charged promptly.

4 Battery charging

The power indicator is located in the yellow power ON key.

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The battery can be charged when S3302 series spectrum analyzer is OFF or operating. Charging steps:

a) Install the battery to be charged into the machine.
b) Connect the external power supply with the accompanying AC-DC adapter.
c) If the battery is charged in the OFF state, the power indicator in the left lower corner of the front panel will be

yellow and flicker, indicating that the battery is being charged, and after the battery is fully charged, the
indicator will be yellow and normally on. If the battery is charged in the operating state, the power indicator
will be green and flicker, indicating that the battery is being charged, and after the battery is fully charged, the
indicator will be green and normally on. In this case, the battery icon on the right side of the system status bar
of the display will be full.

In addition, the run-out battery should be charged for about 4h in the shutdown status.

Section 4 User Inspection

1 Start-up of spectrum analyzer

Connect S3302 series spectrum analyzer to the external power supply with the power adapter. Observe the power
indicator on the front panel. If the power indicator is yellow, it indicates that the standby power supply is normal.
Gently press the power switch on the front panel for more than 3s. Observe whether the power indicator on the front
panel turns green and whether the backlight of the display is ON. You should wait for about 30s for start-up of the
display. Then the normal start-up image will appear. The display screen should include no warming prompt 10min
after start warm-up.

Note: “Flicker” of the indicator indicates that the electricity quantity of the internal battery is not full and the battery is
being charged.

2 Shutdown of spectrum analyzer

Press the yellow power switch [ ] in the left lower corner of the front panel for about 3s. The spectrum analyzer
will automatically exit the measurement application program, and the power supply will be shut down.

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Chapter III Basic Operation

Section 1 Description of front panel

The front panel of S3302 series spectrum analyzer is shown below.

Fig. 3-1 Front Panel

The keys on the front panel are shown in the [XXX] form in this manual, where XXX is the key name; Bottom buttons on the touch screen are shown in the
[XXX] form, where XXX is the button name; and buttons of the right menu are shown in the [XXX] form, where XXX is the menu name.

1 Display zone

S3302 series spectrum analyzer is equipped with one 8.4-inch color touch screen. Parameter setting and
information display can be performed by means of touch, thus eliminating the troublesome soft and hard key menu
setting steps and greatly simplifying user operations.

The display zone shows the following information when different functions are active: multiple instrument windows,
in which various settings and measurement data are shown; operating status information; current input data such
as the frequency when required; current operating time of the system; and menu information corresponding to the
current valid operating window. Refer to Fig. 3-2 for the specific introduction.

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Time and date Signal standard and maker

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Title

Fig. 3-2 Display Zone

The information display zone in the screen display zone of S3302 series spectrum analyzer shows various settings
and instrument statuses of the current measurement. Based on the information location on the screen, the
information display zone is divided into the top information display zone, marker, signal standard and title display
zone, left information display zone, measurement data display zone, soft key menu display zone, bottom
information display zone and bottom function buttons, 7 in total.

1) Top information display zone

The top information display zone in the top of the screen shows the system date/time and the current power supply
type, battery capacity and GPS status of the spectrum analysis in sequence from left to right.

Setting and modification of the system date and time: Press [System]→[Date/Time].
Modification of the date format: Press [System]→[Date format].
For the battery type and battery status indicator on the right side of the top information display zone, various

symbols are shown depending on the external power supply and battery capacity, the symbols corresponding to
various power supply modes of the spectrum analyzer are described as follows:

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 If the spectrum analyzer with no battery is powered up with the external power supply, “ ” will be

displayed;

 If the spectrum analyzer is powered up with the fully charged battery and no external power adapter is

connected, “ ” will be displayed; and if the battery is fully charged and the external power

adapter is connected, “ ” will be displayed. With the battery capacity decreasing in
operation, the green zone of the battery capacity symbol will decrease gradually.

 If the spectrum analyzer with the battery is connected to the external power adapter but the battery

capacity is less than 100%, the battery will be charged, and the icon “ ” will be displayed.

 If the spectrum analyzer is not connected with any external power supply, and the battery capacity is less

than 20%, the battery is in the undervoltage state, and the icon “ ” will be displayed. In this
case, the battery should be charged promptly. If the battery capacity is less than 10%, the spectrum
analyzer may further operate for about 10min. In this case, measurement results should be kept promptly.
If the battery capacity is less than 5%, the spectrum analyzer will be shut down automatically.

2) Marker, signal standard and title display zone

Press [System]→[Tip Off On], and the title information will be displayed in this zone.
Press [frequency]→[Signal Std], and the current signal standard name will be displayed.

Press [Maker] or [Peak], and the frequency and amplitude information of the current active marker will be displayed.

3) Measurement trace display zone

The measurement trace display zone shows measurement data. The contents displayed in this display zone vary in
different measurement modes.

4) Left information display zone

This information display zone on the left upper part of the screen shows the current measurement information, such
as the reference level, attenuator setting, display scale, resolution bandwidth, video bandwidth and sweep time,
which can be respectively set with corresponding function keys shown in the table below.

Table 3-1 Functions of Left Display Zone in Spectrum Analysis Mode of S3302 Series

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Label Description Corresponding Functional Key

1

Reference level

0.0dBm

[Amplitude] →[Reference level]

2

Attenuation
20dB

[Amplitude] →[Atten Auto Man]

3

Scale/Division

10.0dB

[Amplitude] →[Scale/Div]

4

Resolution
Bandwidth

3MHz

[BW] →[Res BW Auto Man]

5

Video Bandwidth
3MHz

[BW] →[Video BW Auto Man]

6

Sweep time

441.000ms

[Sweep]→[Sweep time Auto Man]

7 Average [BW] →[Average Off On]

8

Detector
Auto

[BW] →[Average Detector]

5) Bottom information display zone

This information zone located at the bottom of the screen mainly includes two kinds of information:

 Local: showing the current operating status of the spectrum analyzer: local or remote control.
 The current center frequency and span information are displayed at the bottom of the screen. In the zero

span mode of the spectrum analyzer, the bottom information zone will display the following information in
sequence: starting time, center frequency and stop time.

6) Key menu display zone

In order to improve the operation flexibility of S3302 series spectrum analyzer and fully utilize the excellent
performance of the touch screen, the host software of S3302 series includes 8 gray touch keys on the right side, of
which the corresponding functions are directly displayed in the corresponding key zones.

7) Button function button zone

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The bottom function button zone includes 6 function buttons, which have the same functions as hard keys and are
applied to display various menu names in different measurement modes so as to facilitate measurement.

2 Number input zone

The number input zone includes the direction keys, knob, number keys, Backspace, Cancel and OK. All the input
can be modified by keys and knob in input area. Details of keys in input area are as below.

 Direction keys: The UP and DOWN key are applied to increase or decrease the value. The leftward and

rightward key are not provided here. The step value of the UP and DOWN key is set according to the step
of each parameter.

 Knob: Increase or decrease the value. When the knob is rotated clockwise, the value will be increased;

otherwise, the value will be decreased. The knob can be used with the UP/DOWN key to change the
value, with the same step as the UP/DOWN key.

 Numeric keys: Set the number (including the negative number).
 Backspace: Cancel the last number one by one according to the number status.
 Cancel: Cancel the current invalid data.
 OK: Confirm the current parameter setting.

3 Function key zone

The function key zone at the bottom of the screen is used for changing measurement parameter settings, including
six keys.

 [Frequency]: Set the center frequency, starting/stop frequency, span, frequency step, etc. of

measurement.

 [Amplitude]: Set the reference level, attenuator setting, display scale, unit, pre-am pl i fi er control , etc .
 [Bandwidth]: Set the resolution bandwidth, video bandwidth, detector type, average, etc. of

measurement.

 [Marker]: Set specific parameters of the measurement cursor.
 [Peak]: Obtain the peak parameter.

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 [Mode]: Set the measurement mode, including spectrum analysis, interference analysis, analog

demodulation, power measurement, channel scanning and field strength measurement.

Reset button

Press [Reset] to shut down the instrument and power up it again.

4 Power switch

Start and shut down the spectrum analyzer. When the instrument powered up with the external power supply
through the adapter is in the “Standby” state, the yellow indicator near the power switch will be ON. If the power
switch is pressed for more than 3s, the indicator will turn green, indicating that this instrument is “operating”. When
the power switch is pressed for more than 3s in the operating state, the spectrum analyzer will be shut down.

Note: “Flicker” of the indicator indicates that the electricity quantity of the battery is not full at present and the battery
is being charged.

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Section 2 Interface Description

Peripheral interfaces of S3302 series are mainly concentrated on the top panel, as shown in Fig. 3-3, and can be
divided into three parts: power interface, test port and digital interface.

External source

USB

Internet

interface

SD card slot

Audio

Output

RF In

Reference input/output

IF Out

Triggering

GPS

Mini USB

Fig. 3-3 Interface Description

2.1. Power interface

The power interface of the device is for powering the device through DC output of AC -DC adapter or through
external DC power source. The conductor inside the external power interface is positive and the external conductor
is grounded.

2.2 Test ports

1) RF input port: It is used for inputting the signal to be tested. The indicator of the test signal input port of
S3302 series is 50Ω. The N-type female port is applied for S3302D/E and 2.4mm male port for S3302F/G.

2) 10MHz Input/Output port This port is for connecting 10MHz signal of other devices as the reference signal of
the analyzer. It can also be used for outputting the internal 10MHz reference signal for other devices.

3) IF output port: Under zero span, this port can be used for outputting the third or fourth IF signals for other
devices through software configuration.

4) Trigger input port: The external triggering mode of S3302 series is available. The scope of trigger source
must be -5V~+5V when connecting the external trigger source to the trigger input port of the Spectrum
Analyzer. Rising edge trigger or fall edge trigger can be set by the software.

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5) GPS antenna port: This port can be use for connecting GPS antenna device for locating current position of
the Spectrum Analyzer.

To better protect the Spectrum Analy zer, some identi fiers are p rovided at the test port of th e device. The us er must pay attentio n to the content on these
identifiers when using this device, in order to avoid any permanent damage to the device.

Refer to 2.4 for details of instrument symbols in the figure.

2.3 Digital interface

1) Mini USB interface: It is used for connection of the external PC, which is used for program control or data
transmission of S3302 series through the program control commands or function library.

Equipment drive should be installed for connecting the device to PC through USB interface for the first time.

2) USB A type interface: This interface is used for connecting USB peripheral equipment, such as USB storage
device, USB power detector.

3) LAN (network) interface: This 10/100Mbps network interface can be connected by the network cable to the
computer (PC), which is used for program control or data transmission of S3302 series through the
program control commands or function library.

4) SD card slot: This Micro SD card slot can bed used to extend the storage space of the device.

5) Headset jack: This is a standard headset jack for 3.5mm/3 line for audio output of FM/AM/SSB
demodulation. When a headset is not connected to this jack, the audio output will be realized through the
loudspeaker of the device. When a headset is connected to this jack, audio output will be automatically
switched from the loudspeaker to the headset.

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2.4 Instrument symbols

Instrument symbols (warning labels) in the figure mean that the maximum power of the test port input is +30dBm,
and the maximum input DC level is 16VDC. When the device is in operation, the user is not allowed to connect
signal exceeding this range to the port. Otherwise, the device may be destroyed!

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Chapter IV Spectrum Analysis Mode

This chapter mainly introduces relevant information of the spectrum analysis mode of S3302 series spectrum
analyzer, including some typical measurement functions and methods, so that the user that operates this instrument
for the first time can have a general knowledge on some typical applications and test operations of the spectrum
analysis mode after reading this section and get familiar with the operation of this mode.

All operations in this chapter are based on the spectrum analysis mode and not separately described below.

Due to rich measurement functions, the spectrum analysis mode of S3302 series includes a number of complex
parameters. In addition to basic functional parameters such as the frequency, amplitude, bandwidth average, trace,
sweeping and marker parameters, it also includes characteristic functional parameters such as the signal track,
noise marker, peak track, counter, list scanner, trigger, limit, field strength measurement, channel power, occupied
bandwidth, adjacent channel power, C/N, emission mask, IQ capture, audio monitor, etc.

 Signal Track
If the drift signal is tested, the active marker should be placed onto the peak point of the signal by the signal

tracking function of the spectrum analyzer. In this case, the marker peak will always be displayed at the center
frequency of the spectrum analyzer, thus facilitating measurement.

 Noise marker
The noise marker displays the noise power at which noise near the active marker is normalized to the 1Hz

bandwidth. When the noise marker is enabled, the detector is set into the “Sample” mode, and the amplitude scale
is set as “Log”, the marker reading unit will automatically change into dBm(1Hz) or dB/Hz. When the amplitude
scale is set as “Linear”, the marker reading unit will automatically change into V(1Hz) or %.

 Peak Track
When the peak tracking function is enabled, the peak will be searched once by the marker after each sweeping.
 Counter
When the frequency counter function is enabled, the marker reading will be made more accurate, which can help to

improve the accuracy of frequency measurement. The measurement accuracy is Class Hz, and the error within
10Hz.

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 List Scanner
The list scanner function supports the user to edit the scanning segment, and the spectrum analyzer will scan the

edited list based on the set frequency range and other parameters.
 Trigger
Select the trigger mode under “Sweep” or “Measure”, including [Free Run], [Video], [External], [Slope] and [Delay].

The user can select the corresponding mode according to needs. When the previous single or continuous sweep
finishes, the next sweep or measurement is automatically triggered. Set the trigger mode as [Video]. When the
positive slope part of input trigger signal passes through the video trigger level determined by [Trigger Polarity
Positive Negative], the sweep will be triggered. In the [external] trigger mode, synchronize the “Sweep” or “Measure”
with next voltage cycle.

 Limit
The limit function is applied to monitor signals within one band. The spectrum analyzer provides the upper and

lower limit. The user can set the limits. When the amplitude of one signal within one band is more than the set
upper limit or less than the set lower limit, the spectrum analyzer will send the alarm signal.

 Field strength measurement
The spectrum analyzer has the function of field strength measurement, including soft menus such as [Field

Strength Off On], [Recall Antenna], [Edit Antenna] and [Save Antenna]. The field strength can be rapidly
tested with such menus and corresponding test antennas.

 C/N
The C/N function is applied to measure the ratio of the carrier power to noise power, including the carrier bandwidth,

noise bandwidth, offset frequency, span, carrier power, noise power and C/N.
 Emission mask
The emission mask function is applied to recall the limit as the mask to measure whether the signal power exceeds

the mask limit. The mask parameter is one limit, the value of which is determined by means of limit recalling. The
mask can be moved right and left or up and down according to the center frequency and reference power. In the
mask, the limit center is always moved right and left to the center frequency, and also moved up and down to the
reference power point based on the calculated reference power. The reference power is divided into the peak power
and channel power, which are determined by the reference power.

 IQ capture

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The IQ capture function is applied to capture IQ data and save such data into the instrument based on the capture
time, sample rate and capture mode set by the user.

 Audio monitor
The spectrum analyzer has the tune listening function, which can be applied for radio monitoring. The sound effect

can be improved by adjusting the resolution bandwidth during demodulation of the sound difference. In the
demodulation mode, the resolution bandwidth should be preferably set as 300kHz-30kHz.

Section 1 Introduction to Typi c al Meas ure me nts

The spectrum analysis mode of S3302 series is a basic operating mode. The Quick Operation Guide of S3302
Series Spectrum Analyzer has introduces some typical measurement of this mode, including some basic
measurement methods such as basic signal measurement, improvement of frequency measurement accuracy,
measurement of small signals and distinguishing of signals of approximate frequencies. Additionally, this section
introduces the advanced typical measurement functions and methods of the spectrum analysis mode of S3302
series, mainly including:

a) Channel power measurement;
b) Occupied bandwidth measurement;
c) Adjacent channel power ratio measurement;
d) Third-order IM distortion measurement;
e) Drift signal measurement;
f) Noise signal measurement;
g) Distortion measurement;
h) Pulse RF signal measurement.

If [Reset] on the front panel is pressed, the spectrum analyzer will operate again. Unless specially explained, it starts from pressing [Reset] key in the
following examples.

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1 Channel power measurement

Taking the measurement of the channel power of the FM signal for example, this section describes how to apply the
channel power measurement function of S3302 series spectrum analyzer to measure the channel power of the
signal.

1) Definition of channel power

Channel power measurement of one of the most common measurements of the RF transmission system, in which
the channel power refers to the power of the signal within a certain frequency range in the specific interval. If the
specific power is not measured in the power amplifier and filter circuit test, it indicates that the system is faulty. The
channel power measurement is applied to evaluate the communication transmitter, and determine the quality of RF
transmission by comparison with the specific communic at ion pr otocol.

S3302 series spectrum analyzer can be used for measuring the channel power of the FM signal. As the FM signal
is different from the CW signal in several aspects, it can be made more accurate by means of accurate setting.

2) Measurement procedures

The channel power of one FM signal can be measured with S3302 series spectrum analyzer according to the
following procedures.

a) Set the signal generator to output the FM signal:

Use the signal generator to generate one FM signal. Set the frequency as 1GHz, power as -10dBm, FM offset as
500kHz and demodulation rate as 10kHz. Connect the output of the signal generator to the RF input end of the
spectrum analyzer through one cable, as shown in Fig. 4-1. Enable the ON state of the modulation output and radio
frequency.

Fig. 4-1 Schematic Diagram of Connection of Signal Generator and Spectrum Analyzer

b) Reset the spectrum analyzer into the default state:

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Press [Reset].

c) Enable the channel power measurement function:

Press [Measure], [Channel Power] and [Channel Power Off On]. Thus the channel power measurement function is
enabled.

d) Set the center frequency:

Press [Measure], [Channel Power] and [Center Freq] to set the center frequency with number keys. Set the center
frequency of the spectrum analyzer as the frequency of the tested signal, i.e. 1GHz.

e) Set the channel power bandwidth:

Press [Measure], [Channel Power] and [Channel BW] and set the channel power bandwidth as 1MHz with number
keys.

f) Set the channel power span:

Press [Measure], [Channel Power] and [Span] and set the channel power sweeping bandwidth as 2MHz with
number keys.

g) Set the resolution bandwidth and video bandwidth of the spectrum analyzer:

Press [BW] and [RBW Auto Man], and set the resolution bandwidth as 30kHz;
Press [BW] and [VBW Auto Man], and set the video bandwidth as 30kHz or less.

The channel power bandwidth refers to the frequency width of the power displayed by the spectrum analyzer within the bandwidth, while the channel
power span refers to the sweeping frequency range of the spectrum analyzer. The channel power span should be more than or equal to the channel power
bandwidth; otherwise, the channel bandwidth will be automatically set to be equal to the channel power span. The ratio of the channel power span to
channel power bandwidth is a constant. When the channel power span changes, this ratio will remain unchanged. It can be changed by changing the
channel power bandwidth. For example, when the channel power span is doubled, the channel power bandwidth will be increased by the same times.

h) Enable the average function:

Press [BW] and [Average Off On], set the averaging times as 16, and enable the average function.
If the channel power measurement function is enabled, the “Auto” mode of the detector will change into the “Sample”

mode. Two vertical white lines on the screen indicates the channel power bandwidth, and measurement results are
displayed at the bottom of the screen. The channel power measurement interface is shown in Fig. 4-2.

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Fig. 4-2 Channel Power Measurement of FM Signal

2 Occupied bandwidth measurement

Taking the measurement of the occupied bandwidth of the FM signal for example, this section describes how to use
the occupied bandwidth measurement function of S3302 series spectrum analyzer to measure the occupied
bandwidth of the signal.

1) Definition of occupied bandwidth

The occupied bandwidth refer to the bandwidth including energy of certain proportion to the total transmitted power,
with the center frequency of the specified channel as the center. By using the occupied bandwidth measurement
function of S3302 series spectrum analyzer, measurement results can be given rapidly, clearly and accurately.
Depending on the modulation mode, two methods can be applied to calculate the occupied bandwidth.

a) Power percentage:

The occupied bandwidth of the signal is obtained by calculating the bandwidth of the frequency of certain
percentage to the total power of the transmitted power. The power percentage can be set by the user.

b) Power drop XdB:

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The occupied bandwidth in this calculation method is defined as follows: spacing between two frequency points
corresponding to signal power drop by XdB on both sides of the frequency point where the signal peak power is.
The signal power drop XdB can be set by t he user .

2) Measurement procedures

The occupied bandwidth can be measured with S3302 series spectrum analyzer according to the following
procedures:

a) Set the signal generator to output the FM signal:

Use the signal generator to generate one FM signal. Set the frequency as 1GHz, power as -10dBm, FM offset as
500kHz and demodulation rate as 10kHz. Connect the output of the signal generator to the RF input end of the
spectrum analyzer through one cable, as shown in Fig. 4-1. Enable the ON state of the modulation out put and radio
frequency.

b) Reset the spectrum analyzer into the default state:

Press [Reset].

c) Set the center frequency:

Press [frequency] and [Center Freq] to set the center frequency with number keys. Set the center frequency of the
spectrum analyzer as the frequency of the tested signal, i.e. 1GHz.

d) Set the resolution bandwidt h:

Press [BW] and [RBW Auto Man], and set the resolution bandwidth as an appropriate value.

e) Set the video bandwidth:

Press [BW] and [VBW Auto Man], and set the video bandwidth as an appropriate value.
In order to improve the measurement accuracy, it is recommended to set the ratio of the resolution bandwidth to

video bandwidth to be more than 10. Press [RBW/VBW] to change this ratio.

f) Enable the occupied bandwidth measurement mode of the spectrum analyzer:

Press [Measure], [OBW] and [OBW Off On].
After the occupied bandwidth measurement function is enabled, the spectrum analyzer will change into the

occupied bandwidth measurement interface, and measurement results will be displayed at the bottom of the screen.
Refer to Fig. 4-3 for the schematic diagram of occupied bandwidth measurement. Two vertical white lines on the
screen intuitively indicates the frequency range of the occupied bandwidth. After the occupied bandwidth

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measurement function is enabled, the “Auto” mode of the detector will automatically change into the “Sample” mode.
The user can change the measurement method, occupied bandwidth span, etc. with corresponding menus, so as to
obtain more accurate measurement results.

g) Select the measurement method:

Press [Measure], [OBW] and [Method % XdB], and select the occupied bandwidth measurement method. You can
set the method as the power percentage or power drop XdB. The underline indicates the current mode, and the
default setting is the percentage.

Fig. 4-3 Occupied Bandwidth Measurement

h) Change the percentage:

If the percentage method is selected, you can press [Measure], [OBW] and [% 99%], and use the number keys,
UP/DOWN keys or knob to change the percentage. The percentage range is 10% to 99.99%, with the minimum
step of 0.01%. The default setting is 99%.

i) Change the XdB value:

If the XdB method is selected, you can press [Measure], [OBW] and [XdB -3.0 0dB ] and us e the num b er keys,
UP/DOWN keys or knob to change the XdB value. The XdB range is -0.1dB to -100dB, with the minimum step of

0.01dB. The default setting is -3dB.
j) Change the occupied bandwidth span:

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Press [Measure], [OBW] and [Span], and enter the occupied bandwidth span with number keys. Press
corresponding soft keys to enter the unit. The default setting is 3MHz.

k) Disable the occupied bandwidth measurement:

Press [Measure], [OBW] and [OBW Off On], and disable the occupied bandwidth measurement. The interface will
change into the spectrum measurement interface.

3 Adjacent channel power ratio measurement

Taking the measurement of the adjacent channel power ratio of the FM signal for example, this section describes
how to use S3302 series spectrum analyzer to measure the adjacent channel power ratio.

1) Definition of adjacent channel power ratio

The adjacent channel power ratio (ACPR), also known as the adjacent channel leakage power ratio (ACLR) refers
to the ratio of the transmitted power of one channel to the radiation power of the adjacent channel. It is generally
expressed as the ratio of the power within the specified bandwidth under various offsets of the adjacent channel to
the total power of the channel. The adjacent channel power mainly depends on the extension of the modulated
sideband and noise of the transmitter.

The adjacent channel power ratio measurement can be applied, as a substitute of the traditional dual-audio IM
distortion measurement, in nonlinear system tests. The measurement result of the adjacent channel power ratio can
be expressed in two forms: power ratio and power density.

2) Measurement procedures

In the traditional measurement of the narrow-band signal, the distortion performance of the transmitter is evaluated
generally by means of dual-audio signal IM measurement. The broadband modulation signal includes both the
dense spectrum components and high peak signal (also known as the crest factor). IM products of spectrum
components of the signal are always around the spectrum. The IM measurement of the broadband FM signal is
complex, while ACPR is closely related to IM products arising from nonlinear distortion. Therefore, ACPR is a better
method to measure the nonlinear distortion of the broadband FM signal.

The ACPR of the broadband FM signal can be measured with the ACPR measurement function of S3302 series
spectrum analyzer according to the following procedures.

a) Set the signal generator to output the broadband FM signal:

Use the signal generator to generate one FM signal. Set the frequency as 1GHz, power as -10dBm, FM offset as
500kHz and demodulation rate as 10kHz. Connect the output of the signal generator to the RF input end of the

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spectrum analyzer through one cable, as shown in Fig. 4-1. Enable the ON state of the modulation output and radio
frequency.

b) Reset the spectrum analyzer into the default state:

Press [Reset].

c) Set the reference level of the spectrum analyzer:

Press [Amplitude] , [Ref Level] and -10[dBm];
Press [Amplitude] and [Scale/Div] and set the scale as 10dB/division.

d) Set the resoluti on bandwidth and video bandwidth:

Press [BW] and [RBW Auto Man], and set the resolution bandwidth as 30kHz;
Press [BW] and [VBW Auto Man], and set the video bandwidth as 30kHz or less.

e) Enable the ACPR measurement:

Press [Measure], [ACPR] and [ACPR Off On] to enable the ACPR interface.

f) Set the center frequency of the main channel:

Press [Center Freq] and set the center frequency of the main channel with number keys, i.e. 1GHz.

g) Set the bandwidth of the main channel:

Press [Main Ch BW] and set the bandwidth of the main channel with number keys, i.e. 1MHz.

h) Set the adjacent channel bandwidth:

Press [Adj Ch BW] and set the adjacent channel bandwidth with number keys, i.e. 2MHz.

i) Set the channel spacing:

Press [Ch Spacing] and set the channel spacing as 1MHz with number keys.

j) Enable the ACPR test:

Press [ACPR Off On]. Then the measurement results will be displayed at the bottom of the screen. Refer to Fig. 4-4
for the schematic diagram of ACPR measurement.

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Fig. 4-4 ACPR Measurement

k) Limit setting:

The limit test function can be applied so as to easily observe whether the adjacent channel power is beyond the set
range. Press [Measure], [ACPR] and [More 1/2] to enter the ACPR limit test setting menu.

Press [Upper Limit] and enter the upper limit with number keys.
Press [Lower Limit] and enter the lower limit with number keys.

l) Enable the limit test function:

Press [Limit Test Off On] to enable the limit test function. If the adjacent channel power is beyond the set limits, the
screen background will become red for indication.

4 Third-order IM distortion measurement

1) Definition of third-order IM distortion

Mutual interference between equipment in common in crowd operating environment of the communications system.
For example, second-order and third-order IM distortion is common in narrow-band systems. When there are two
signals (F1 and F2) in one system, they and second harmonic distortion signals generated by them (2F1 and 2F2)
mix and become third-order IM products 2F2-F1 and 2F1-F2 very close to original signals, thus resulting in high-order

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IM distortion. Such distortion products are mostly generated by devices such as amplifiers and mixers in the
system.

The measurement of third-order IM distortion is described below. This section provides an example of how to
display two signals at the same time on the screen of the spectrum analyzer, and introduces how to set the
resolution bandwidth, mixer level and reference level, as well as some marker functions.

2) Measurement procedures

a) Connect the tested instrument with spectrum analyzer as shown in Fig. 4-5.

This example involves one 6dB directional coupler, one 1GHz signal generator and one 1.001GHz signal generator.
Of course, the signal generator of other frequencies are allowed. However, the frequency interval must be
approximately 1MHz in this example.

Spectrum Analyzer

1GHz

1.001GHz

50Ω RF In

Directional

coupler

Signal generator 1

Signal generator 2

Fig. 4-5 Connection of Third-order IM Distortion Measurement System

Set the output frequency of one signal gen er ator as 1GHz and the output frequency of the other signal generator as

1.001GHz, so that the frequency interval of two signals transmitted into the spectrum analyzer is 1MHz.

Set the same output amplitude for both signal generators (-20dBm in this example).

b) Set the spectrum analyzer until both signals are displayed on its screen at the same time.

Press [Reset].
Press [Frequency], [Center Frequency], 1.0005[GHz].
Press [frequency], [Span] and 5[MHz].
You can see that both signals are at the center of the screen, as shown in Fig. 4-6. If the applied frequency interval

is different from that in this example, select the span more than three times of the frequency interval of the signal
generators.

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c) Reduce the resolution bandwidth until you can see the distortion product:

Press [BW] and reduce the resolution bandwidth with the step key [↓].

d) Adjust both signal generators until the amplitudes of input signals are the same.

Press [Maker], [Delta], [Peak] and [Next Peak]. Adjust the signal generator corresponding to the marker until the
amplitude difference is zero. If required, reduce the video bandwidth.

Fig. 4-6 Signals at Center of Display of Spectrum Analyzer

e) Set the reference level and make the signal peak at the reference level:

Press [Peak] and [Peak Search], and read the peak power.
Press [Amplitude], [Reference Level].
In order to achieve the best measurement accuracy, the signal peak of the signal generators should be set at the

reference level, as shown in Fig. 4-7.

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Fig. 4-7 Signal Peak at Reference Level

f) Set the second marker and measure the distortion product:

Once the marker is activated, the second marker will be generated by the differential marker function, and the
difference between both markers will be displayed. In this case, relative measurement can be performed easily.

Press [Peak] to activate one marker.
Press [Maker] and [Delta] to activate the second marker.
Press [Peak] and [Next Pk Left] or [Next Pk Right] to set the second marker at the peak point of the distortion

product beside the signal generated by the signal generator. As shown in Fig. 4-8, the frequency and ampli tude
difference of both markers will be shown in the marker display zone, and the marker amplitude difference will be the
measured value of third-order IM distortion.

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Fig. 4-8 Relative Measurement of Internal Modulation Distortion

g) Calculation of third-order interception (TOI) point:

The ratio (in dB) of the distortion component level to signal level has no great significance for system distortion,
unless the signal level is specified. The interception point can be applied to specify and evaluate the system
distortion level. The difference between the third-order distortion component level and fundamental signal level is
twice of that between the fundamental signal level and third-order interception point. The third-order interception
(TOI) point can be calculated by the following formula:

2

dB

LTOI

3im

in

∆

−=

Where:

in

L

: Refer to two input signal levels, in dBm.

3im

dB∆

: means the difference between the third-order IM product and input signal level, in dB.
As shown in Fig. 4-7, if the differential marker reading is -47.30dB and the signal level is -23.0dBm, the
third-order interception (TOI) point is:

TOI= -22.2- (-51.11/2)=0.65(dBm)

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5 Drift signal measurement

1) Definition of drift signal

If the drift signal is measured with the spectrum analyzer, the center frequency should be changed in different
period so as to facilitate observation. If the signal tracking function of the spectrum analyzer is enabled, the marker
peak will always be displayed at the center frequency of the spectrum analyzer, thus facilitating measurement.

This section introduces how to measure the drift signal, in which the signal tracking function, marker function and
maximum holding function of the spectrum analyzer are applied to observe the amplitude trace and occupied
bandwidth of the drift signal .

5.1.1.1 2) Measurement of frequency drift for signal generator

The spectrum analyzer is able to measure the short-time and long-time stability of the signal generator. By using
the maximum trace holding function, the spectrum analyzer can display the maximum peak amplitude and
frequency drift of the input signal. The max hold function of track may be used to measure the occupied bandwidth
of signal.

In this example, the signal tracking function of the spectrum analyzer is applied to keep the drift signal always
displayed at the center and the maximum trace holding function to capture the drift.

a) Set the output signal of the signal generator:

Set the signal generator to outp ut the 300M H z and -20dBm signal. Connect the output of the signal generator to the
input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the RF output.

b) Set the center frequency, span and reference level of the spectrum analyzer:

Press [Reset].
Press [Frequency], [Center Frequency], 300[MHz].
Press [frequency], [Span] and 10[MHz].
Press [Amplitude] , [Ref Level] and -10[dBm].

c) Set the marker at the signal peak, and enable the signal tracking function.

Press [Peak] and [Peak Track Off On].
Press [Frequency] and [Signal Track Off On].

d) Reduce the span:

Press [Frequency], [Span] and 500 [kHz]. You can see that the signal is always at the center.

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e) Disable the signal tracking function:

Press [Frequency] and [Signal Track Off On].

f) Use the maximum holding function to measure the signal drift.

Press [Trace] and [Max Hold].
When the signal changes, the max hold will maintain the maximum response to the input signal.

g) Activate the trace 2 and set it into the continuous clearing and writing mode.

Press [Trace], [Trace 1 2 3] and [Clear Write].

h) Change the output frequency of the signal generator.

Slowly change the output frequency of the signal generator, with the step of 1kHz and the range of ±50kHz. The
spectrum analyzer will display the information shown in Fig. 4-9.

Fig. 4-9 Observation of Drift Signal by Maximum Holding Function

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6 Noise signal measurement

1) Definition of noise signal

In communications systems, signal-to-noise ratio (SNR) is usuall y us ed to expr es s noi s e ampl i tud e. Whe n the nose
level in the system increases, SNR decreases and it will be harder to demodulate modulated signals. SNR
measurement is also used to indicate measurement of ratio of carrier against noise in communications systems.

Measurement of the S/N and noise by the marker function of S3302 series spectrum analyzer is described below. In
the example, SNR is measured with the signal (carrier) having only single frequency point. If the modulation signal
is tested, this test process should be modified to correct the level of the modulation signal.

2) Measure SNR

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -10dBm. Connect the output of the sig nal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the ON state of the radio
frequency.

b) Set the center frequency, span, reference level and attenuator.

Press [Reset].
Press [Frequency], [Center Frequency], 1[GHz].
Press [Frequency], [Span] and 5[MHz].
Press [Amplitude], [Ref Level] and -10[dBm].
Press [Amplitude], [Atten Auto Man] and 40[dB].

c) Set the marker at the signal peak, and the differential marker at the noise location with the offset of 200kHz.

Press [Peak] and [Peak Track Off On].
Press [Marker], [Delta] an d 200[k H z].

d) Enable the noise marker function and observe the S/N:

Press [Marker] and [Noise Marker Off On]. As shown in Fig. 4-10, the S/N reading is in dBc/Hz, as the noise value
refers to the noise bandwidth normalized to 1Hz.

This value decreases by 10×log(BW). If you wish to obtain noise values under different channel bandwidth, the
measurement result needs to be corrected based on current bandwidth. For example, if the reading of the spectrum
analyzer is -85dBc/Hz and the channel bandwidth is bandwidth, S/N is:

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S/N=85dBc/Hz - 10×log(30kHz) =40.2dB c/( 30k Hz)

If the differential marker is less than one fourth of the edge distance between the signal peak and response, errors
may occur in noise measurement.

Fig. 4-10 S/N Measurement

3) Noise measurement by noise marker function

In this example, the noise of 1Hz bandwidth is measured by the noise marker function, using the 1GHz external
signal.

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -10dBm. Connect the output of the signal
generator to the input port of the spectrum analyzer, and enable the ON state of the radio frequency.

b) Set the center frequency, span, reference level and attenuator.

Press [Reset].
Press [Frequency], [Center Frequency], 999.98[MHz]
Press [frequency], [Span] and 100[kHz].
Press [Amplitude], [Ref Level] and -10[dBm].
Press [Amplitude], [Atten Auto Man] and 40[dB].

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c) Activate the noise marker.

Press [Maker] and [Noise Marker Off On].
Note: The “Sample” mode of the detector will be enabled automatically. To obtain the noise power under different

bandwidth, you can correct the current bandwidth based on 10×log(BW). For example, if the noise power within 1
kHz bandwidth is to be obtained, 10×log (1000) or 30 dB has to be added to the reading.

d) Reduce the measurement error by increasing the sweep time:

Press [Sweep], [Sweep Time Auto Man] and 3[s].
In the “Average” mode of the detector, you can increase the sweep time so that the trace data are averaged in a

longer interval, so as to reduce the measurement error.

e) Move the marker to 1GHz.

Press [Maker] and rotate the knob on the front panel until the noise marker reading is 1GHz.
The noise marker value is calculated based on 5% of points on the whole sweep trace, with the marker location as

the center. The noise marker will not be at the signal peak since such position has no enough trace points for
calculation. Therefore, when the resolution bandwidth is narrow, the noise level will average trace points below the
signal peak. As shown in Fig.4-11:

Fig. 4-11 Noise Measurement by Noise Marker Function

f) Set the spectrum analyzer into the zero span mode, with the marker location as the center.

Press [Peak] and [Marker→Center].
Press [frequency], [Span] and [Zero Span].
Read the [Maker].

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In this case, the amplitude reading of the noise marker is correct, as the averages of all points are at the same
frequency, which is not affected by the shape of the resolution bandwidth filter. The noise marker is calculated
based on the average of the interested fre qu enc y poi nts. The power of discrete frequenc y poi nts should be
measured in the zero span mode, with the spectrum analyzer tuned to the interested frequency point.

7 Distortion measurement

Mutual interference between equipment in common in crowd operating environment of the communications system.
For example, second-order and third-order intermodulation distortion is common in narrowband systems. When
there are two signals (F1 and F2) in one system, they and second harm oni c di s tor ti o n sign al s gener ated by them
(2F1 and 2F2) mix and become third-order intermodulation products 2F2-F1 and 2F1-F2 very close to original signals,
thus resulting in high-order intermodulation distortion. Such distortion products are mostly generated by devices
such as amplifiers and mixers in the system. Most transmission units and signal generators have harmonics and
their components need to be measured.

1) Identification of distortion generated by spectrum analyzer

In the case of large signal input, the spectrum analyzer may be subject to distortion, which will affect the distortion
measurement results of true signals. You can set the attenuator to determine which signal is a distortion signal
generated by the spectrum analyzer. This example shows whether the spectrum analyzer is subject to harmonic
distortion based on the input signal.

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 200MHz and power as 0dBm. Connect the output of the signal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the ON state of the radio
frequency.

b) Set the center frequency and span of the spectrum analyzer.

Press [Reset].
Press [Frequency], [Center Frequency] and 400[MHz].
Press [frequency], [Span] and 500[MHz].
You can see on the trace of the spectrum analyzer that the harmonic distortion of the signal is subject to 200MHz

deviation from the original 200MHz signal, as shown in Fig. 4-11.

c) Set the center frequency of the spectrum analyzer at the first harmonic distortion location.

Press [Peak] and [Next Peak]

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Press [Peak] and [Marker→Center].

d) Set the span as 50MHz and reset the center frequency.

Press [frequency], [Span] and 50[MHz].
Press [Marker→] and [Marker→Center].

e) Set the attenuator as 0dB.

Press , [Atten Auto Man] and 10[dB].
Press [Peak] and [Peak Track Off On].
Press [Maker] and [Delta].

Fig. 4-12 Observation of Harmonic Distortion

f) Increase the attenuator setting to 10dB:

Press [Atten Auto Man] and 10[dB].
Observe the differential marker reading, as shown in Fig. 4-13. The reading is the distortion difference of the

attenuator at 0dB and 10dB. If the attenuator is changed and the differential marker reading is 1dB or more, it
indicates that the spectrum analyzer is subject to certain distortion. If the differential marker reading is not obvious,
the attenuation may be increased.

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Fig. 4-13 Attenuator Setting - 10dB

The amplitude reading of the differential marker is provided by two sources: 1. If the RF attenuation is increase, S/N
will decrease, and this reading will be positive. 2. If the harmonic distortion of the spectrum analyzer decreases, this
reading will be negative. The larger the reading, the bigger the error of measurement. In such case, the attenuator
setting may be changed to reduce absolute amplitude of such delta marker reading.

2) Quick harmonic measurement

In this section, harmonic components are measured of a signal with frequency of 1 GHz and power of -10 dBm
generated by the signal generator.

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -10dBm. Connect the output of the sig nal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the ON state of the radio
frequency.

b) Set the starting frequency and stop frequency of the spectrum analyzer.

Press [Reset] key.
Press [frequency], [Start Freq], 800[MHz], [Stop Freq] and 2.5[GHz].
As shown in Fig. 4-14, the fundamental wave and second harmonic will be displayed on the screen.

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Fig. 4-14 Input Signal and Harmonic

c) Set the video bandwidth to smooth noise so as to improve the resolution.

Press [Bandwidth], [Video Bandwidth Auto Man] to enable auto off.
Use [↓] key to reduce video bandwidth.

d) In order to improve the measurement accuracy, set the peak level of the fundamental wave as the reference

level.

Press [Peak] and [Peak Search], and read the peak power.
Press [Amplitude] and [Ref Level], and set it as the peak power. Results are shown in Fig. 4-15.

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Fig. 4-15 Setting of Signal Peak as Reference Level for Maximum Accuracy

e) Activate the second marker.

Press [Delta], and [Next Peak].
In this case, the fixed marker is on the fundamental wave, while the mobile marker is on the peak point of the

second harmonic, as shown in Fig. 4-16.

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Fig. 4-16 Second Harmonic Measurement based on Marker Difference

f) Measure the harmonic distortion (Method 1).

The fundamental wave and the second harmonic as shown in the figure has am amplitude difference of about -60
dB, or a harmonic distortion of 0.1% (see Fig. 4-17).

0.1 1.0 10.0 100

－60

－50

－40

－30

－20

－10

Harmonic

distortion

percent (%)

Fig. 4-17 Conversion of Percentage of Harmonic Distortion Amplitude

To measure the third harmonic, press [Next Pk Right] and read the amplitude ratio of other harmonics to the
fundamental wave.

g) Measure the harmonic distortion (Method 2).

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Press [Amplitude], [Units] and [Volt].
In this case, the unit of the differential marker will automatically change into volt. An easy way to determine

distortion percentage is to change the unit to volt. Move the decimal of the proportion indicated by the differential
marker rights for two places to obtain the distortion percentage. The minimum ratio that can be displayed is 0.01 or
1%.

3) Accurate harmonic measurement

It takes more steps to measure in this method, but since measurement is done with smaller span and resolution
bandwidth for each signal, the signal-to-noise ratio is increased and more accurate measurement result will be
obtained. It will be explained below how to measure the harmonic of 1 GHz signals.

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -10dBm. Connect the output of the sig nal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Enable the ON state of the radio
frequency.

b) Set the starting frequency and stop frequency of the spectrum analyzer.

Press [Reset] key.
Press [frequency], [Start Freq], 800[MHz], [Stop Freq] and 2.5[GHz].

c) Set the video bandwidth to smooth noise so as to improve the resolution.

Press [Bandwidth], [Video Bandwidth Auto Man] to enable auto off.
Use [↓] key to reduce video bandwidth.

d) Reduce the span by the signal tracking function.

Press [Peak] to activate the signal peak of marker search.
Press [frequency] and [Signal Track Off On].
Press [frequency], [Span] and 100[kHz].

e) Disable signal tracking.

Press [Frequency] and [Signal Track Off On].

f) Move the signal peak to the top division to obtain the highest amplitude measurement accuracy.

Press [Peak] and [Peak Search], and read the peak power.

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Press [Amplitude] and [Ref Level], and set it as the peak power. Results are shown in Fig. 4-18.

Fig. 4-18 Input Signal under 100kHz Span

g) Set the step of the center frequency as the signal frequency of the fundamental wave.

Press [Frequency] and [Frequency Step Auto ON/OFF] and enter 1 GHz.

h) Measure the second harmonic.

Press [Maker], [Marker→], [Marker→Center] and step key [↑]. Change the center frequency of the spectrum

analyzer to second harmonic by stepping operation. Press [Peak] and [Peak Search], and read the peak power.
Press [Amplitude] and [Ref Level], and set it as the peak power. Adjust the harmonic peak to the reference level.

The second harmonic amplitude is shown in Fig. 4-19.

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Fig. 4-19 Second Harmonic Amplitude

i) Calculate the harmonic distortion.

Change the distortion percentage of the second harmonic to fundamental wave as shown in Fig. 4-17. The unit can
be changed again to volt in order to read the voltage ratio of two signals.

j) Measure other harmonics.

Repeat Step (i) to (j) to other harmonics to be measured. Calculate the distortion percentage of each harmonic.
Total signal harmonic distortion percentage is also subject to frequent test. In order to test such parameter,

amplitude of each harmonic should be tested with linear unit (such as volt) rather than relative unit dBc. Press
[Amplitude], [Units] and [Volt] to set the amplitude unit as volt. The measured signal amplitude can be applied in the
following equation to calculate the total harmonic distortion:

( ) ( ) ( )

%

100

distortion harmonic Total

1

22

3

2

2

A

AAA

n

+⋅⋅⋅++×

=

Where:

A

1

- refers to fundamental wave amplitude (V)

A

2

- refers to second harmonic amplitude (V)

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A3 - refers to third harmonic amplitude (V)
A

n

refers to nth harmonic amplitude (V)

If the signal amplitude is carefully measured as shown in the above example, the obtained harmonic distortion
percentage is accurate.

8 Pulse RF signal measurement

1) Definition of pulse RF signal

The pulse RF signal refers to a RF pulse string of the same repetition frequency and constant pulse width, shape
and amplitude. This section introduces several methods of measuring pulse RF signal parameters, including how to
measure the center frequency, pulse width and pulse repetition frequency. In addition, the measurement of peak
pulse power is also discussed.

The resolution bandwidth has great influence on pulse RF signal measurement. You must understand the
relationship between the resolution bandwidth and pulse repetition frequency. If the resolution bandwidth is
narrower than the pulse repetition frequency, only individual frequency components of the pulse RF signal will
appear on the screen. This is known as the narrow band mode. The mode in which the resolution bandwidth is
broader than the pulse repetition frequency is known as the broad band mode. In this case, you can see the
spectrum envelope formed by pulse segments that are equalized by the tested pulse repetition frequency.

2) Center frequency, side lobe ratio and pulse width measurement of pulse RF signal

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -20dBm. Connect the output of the sig nal
generator to the input port of the spectrum analyzer, as shown in Fig. 4-1. Set the repetition frequency of pulse
modulation as 1kHz and pulse width as 900ns. Enable the pulse modulation and RF output.

b) Set the spectrum analyzer:

The pulse RF signal is generally measured in the broad band mode. In order to prevent the influence of the video
filter on measurement results, the video bandwidth should be set as 3MHz.

Press [Reset] key.
Press [Frequency], [Center Frequency] and 1[GHz].
Press [frequency], [Span], 10[MHz], [sweep], [Sweep Time Auto Man] and 60[ms].
Press [BW], [RBW Auto Man], 100 [kHz], [VBW Auto Man] and 100 [kHz].

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Press [BW], [Detector] and [Peak] to activate the peak detector.
Enable the center frequency function and adjust the span until the center side lobe and at least one pair of side

lobes appear on the screen, as shown in Fig. 4-20.

Fig. 4-20 Main Lobe and Side Lobe

Increase the sweep time (decrease the sweeping speed) until the graph is filled into a solid line, as shown in Fig.
4-21. If the spectrum line cannot be filled, it indicates that the instrument is not in the broad band mode. In this case,
the following steps of measurement of the sidelobe ratio, pulse width and peak pulse power will not apply. The
resolution bandwidth should be more than 1kHz.

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Fig. 4-21 Trace Display in Solid Line Form

c) Read the center frequency of the pulse and amplitude of the main lobe.

Press [Peak].
The marker reading is the center frequency of the pulse and amplitude of the main lobe.

d) Set the marker at the center frequency of the main lobe, and measure the side lobe ratio:

Press [Peak], [Maker], [Delta], [Peak] and [Next Peak].
The amplitude difference between the main lobe and side lobe is the side lobe ratio, as shown in Fig. 4-22.

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Fig. 4-22 Side Lobe Ratio Shown by the Marker

e) Measure the pulse width, which is equal to the reciprocal of the frequency difference between the peaks of two

side lobe envelopes.

Press [Maker], [Delta], [Peak], [Next Pk Right] and [Next Pk Right].
In this case, the reciprocal of the frequency difference indicated by the differential marker is the pulse width, as

shown in Fig. 4-23. To obtain the most accurate pulse width, you can manually adjust the marker location and
measure the distance between the zero crossing points of two adjacent side lobes. You can also reduce the
resolution bandwidth to make the zero crossing point sharper and measurement accuracy higher.

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Fig. 4-23 Pulse Width Shown by the Marker

3) Pulse repetition frequency (PRF) measurement

The pulse repetition interval (PRI) refers to the time interval between any two adjacent pulse responses.

a) Set the output signal of the signal generator:

Set the frequency of the signal generator as 1GHz and power as -20dBm. Connect the output of the sig nal
generator to the input port of the spectrum analyzer. Set the repetition frequency of pulse modulation as 1kHz and
pulse width as 900ns. Enable the pulse modulation and RF output.

b) Set the spectrum analyzer:

Press [Reset] key.
Press [frequency] and 1[GHz].
Press [frequency], [Span], 10[MHz], [sweep], [Sweep Time Auto Man] and 1.705[s].
Press [BW], [RBW Auto Man] and 1[kHz].
Press [BW], [VBW Auto Man] and 3[MH z ].
Press [BW], [Detector] and [Peak] to activate the peak detector.
Adjust the span until the main lobe and at least one side lobes appear on the screen.

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Readjust the output amplitude of the signal generator until it is shown in the screen. Reduce the sweep time (i.e.
increase the sweeping speed) until the contents similar to those in Fig. 4-24 are displayed.

c) Measure the pulse repetition interval:

Press [Sweep] and [ Sweep$Cont| Single]
Press [Peak], [Maker][Delta] and [Peak] [Next Peak]. The difference of two markers is the pulse repetition interval

(PRI), and its reciprocal is the pulse repetition frequency (PRF).

Fig. 4-24 Measurement of Pulse Repetition Frequency

4) Peak pulse power measurement

Now we have obtain the main lobe amplitude and pulse width. In addition, we can easily obtain the resolution
bandwidth of the spectrum analyzer. Therefore, the peak pulse power can be obtained based on such parameters.

In the broad-band measurement mode of the spectrum analyzer:

Peak pulse power =(main lobe amplitude) -(20 log T

eff

×BWi)

Where:

Teff -pulse width, in second. Second

BWi - impact bandwidth, in Hz (equal to the resolution bandwidth applied in 1.5× “Pulse width

measurement”)

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In the narrow-band measurement mode of the spectrum analyzer:

peak pulse power =(main lobe amplitude) -(20 log T

eff

/T)

Where:

Teff -pulse width, in second. Second
T——pulse repetition frequency

The phenomenon in which the peak pulse power is not equal to the main lobe amplitude is known as pulse
desensitization. The sensitivity of the spectrum analyzer will not be decreased by the pulse signal. Accurately, pulse
desensitization is caused by distribution of the CW carrier power of pulse modulation to a number of spectrum
components (i.e. carrier and sideband). Therefore, each spectrum only contains part of the total power.

In measurement of the main lobe amplitude, you should change the attenuator of the spectrum analyzer and verify that the main lobe amplitude will not
change accordingly. If the change exceeds 1dB, it indicates that the spectrum analyzer is in the gain compression state. In this case, you must increase
the attenuation amount of the attenuator.

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Section 2 Structure of Spectrum Analysis Menu

中心频率

频率

扫宽

起始频率

终止频率

步进频率

Auto

Man

信号跟踪

Off

On

信号标准

--

Channel

--

>

Head

Signal Std

Tail

Page Up

Page Down

Done

Cancel

Span

Span

Full Span

Zero Span

Last Span

< Back

IF Out

Ref Level

0.0dBm

Amplitude

Ref Position

Atten

Auto

Man

Scale/Div

10.0dB

Scale Type

Logarithm

Linear

Units

dBm

Pre-amplifier

Off

On

>

dBm

Units

dBmV

dBuV

Volt

Watt

>

< Back

RBW

Auto

Man

BW

VBW

Auto

Man

Average

Off

On

SPAN/RBW

100

RBW/VBW

1

Detector

Auto

>

Auto

Detector

Normal

Peak

NPeak

Sample

>

< Back

Average

RMS

Marker

1

2 3 4 5 6

Marker

Normal

Delta

Noise Marker

Off

On

Counter

Off

On

Marker-> >

Marker->

Center Freq

Marker->

Marker->
Step Freq

Marker->

Start Freq

Marker->
Stop Freq

>

< Back

Off

All Off

Center Freq

Freq

Span

Start Freq

Stop Freq

Step Freq

Auto

Man

Signal Track
Off

On

Signal Std

--

Channel

--

>

中心频率

频率

扫宽

起始频率

终止频率

步进频率

Auto

Man

信号跟踪

Off

On

信号标准

--

Channel

--

>

Peak Search

Peak

Next Peak

Next Pk Left

Next Pk Right

Max Value

Min Value

Peak Track

Off

On

Marker->

Center Freq

IF Out

Off

On

IF Out

Intermediate

frequency selection

3IF

4IF

< Back

>

>

Fig. 4-25 Overall Block Diagram of Spectrum Analysis Menu

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中心频率

频率

扫宽

起始频率

终止频率

步进频率

自动

手动

>

Spectrum

Analyzer

Mode

IA

AM-FM-PM

Analyzer

PM

Ch Scanner

Sweep Time

Auto

Man

Sweep

Sweep Type

Continuous

Single

Sweep Once

Triggering

[Free Run]

Sweeping mode

Linear

List

Edit List >

Free Run

Triggering

Video

External

1.50V

Trigger Polarity

Positive

Negative

Trigger delayed

1.000us

>

< Back

Save List

Load List

>

>

Add Seg

Edit List

Delete Seg

Delete All

Done

Cancel

Head

Tail

Page Up

Page Down

Done

Delete All

>

Delete

Cancel

中心频率

频率

扫宽

起始频率

终止频率

步进频率

自动

手动

信号跟踪

关

开

>

Limit

Up

Down

Limit

Limit

Off

On

Test

Off

On

Edit Limit

Offset

0.0dB

>

Freq

Edit Limit

Amplitude

Add Point

Delete Point

Left Point

< Back

Default Limit

Right Point

Trace

1

2 3

Trace

Clear Write

Max. Hold

Min. Hold

View

Blank

终止频率

步进频率

自动

手动

信号跟踪

关

开

Alarm

Off

On

Save Limit

Recall Limit >

A

A

A

Field Strength

Fig. 4-26 Overall Block Diagram of Spectrum Analysis Menu (continued)

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Field Strength

Measure

Channel Pwr

OBW

Adjacent

Channel Power

Emission Mask

>

OBW

Off On

OBW

Measurement

Method

Percent XdB

Percent

99.00%

XdB

-3.00dB

Span

< Back

终止频率

步进频率

自动 手动

信号跟踪

关

开

C/N

Measure Off

More 1 of 2>>

Channel Pwr

Off On

Channel Pwr

Center Freq

Channel BW

Span

>

>

>

>

>

< Back

>

Field Strength

Off On

Field Strength

Recall

Antenna

Edit

Antenna

>

< Back

>

Save Antenna

Edit Antenna

Edit Antenna

Delete Point

Delete All

>

Cancel

Done

>

Tune Listen

IQ Capture

Measure

Measure Off

More 2 of 2 >

C

/N

Off

On

Center Freq

C/N

<

Back

Carrier BW

3.000

MHz

Noise BW

3.000MHz

Freq Offset

3.000MHz

Emission Mask

Off

On

Emission Mask

Channel BW

1.000MHz

Recall Limit

as Mask

Reference power

Peak signal

Channel

Peak Marker
Off On

终止频率

步进频率

自动 手动

信号跟踪

关

开

Page Up

Page Down

< Back

>

Adjacent Channel

Power

Off On

Center Freq

Adjacent Channel

Power

Ch Spacing

3.

000MHz

Main Ch BW

3.

000MHz

Adj Ch BW

3.

000MHz

Limit Test

Off On

Upper Limit

0.0dB

Adjacent Channel

Power

< Back

Lower Limit

0.0dB

More 2 of 2

< Back

More 1 of 2

>

IQ Capture

Off On

Start Capture

IQ Capture

Capture Time

1.000

ms

Capture Mode

Single

Continuous

Sample Rate

5.000MHz

Tune Listen
Off

On

Tune Listen

Demod Type

FM

Demod Time

100.00ms

Demodulation Mode

Continuous OFF

Continuous

Volume

95

信号跟踪
关 开

< Back

>

Triggering
[

Free Run]

Save Name

[IQCapt...]

< Back

>

Free Run

Triggering

External

1.50V

Trigger Polarity

Positive
Negative

Trigger delayed

1.000us

>

< Back

>

FM

Demod Type

AM

USB

LSB

信号跟踪

关 开

< Back

>

A

A

>

>

>

Fig. 4-27 Overall Block Diagram of Spectrum Analysis Menu (continued)

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Save State

Save/Recall

Recall State

Save Data

Recall Data

Save Pic

Default State

>

File

Manager

Location

[

Internal

]

>

>

Src File

File Manager

Dst File

Copy

Delete the file

信号跟踪
关

开

< Back

>

Internal

Location

SD

USB

>

AliLO Nulling

System

Date Time

Display

GPS

LAN

>

Frequency reference

Internal

External

More 1 of 2 >

>

>

GPS

Off On

GPS

GPS Info

Reset

信号跟踪

关

开

< Back

>

Default

Display

Black White

Night Vision

Brightness control

Auto

Man

Brightness setting

1 2 3 4 5

< Back

Prev

LAN

Next

IP

Mask

Gateway

信号跟踪

关

开

< Back

>

Year

Date Time

Month

Day

信号跟踪

关

开

<

Back

>

Hour

Min

>

A

A

Reference output

Off

On

Fig. 4-28 Overall Block Diagram of Spectrum Analysis Menu (continued)

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Language

System

Power Saver

System Info

Error Log

Title

Off

On

>

>

>

Admin

More 2

of 2 >

Sleep

Off

On

Power Saver

Sleep
5 min

Automatic

shutdown

Off

On

Shutdown Time

1

min

< Back

Simplified

Chinese

Language

English

信号跟踪

关

开

<

Back

>

Head

Error Log

Tail

Delete All

Page Up

Page Down

<

Back

>

Date Format

>

Y/M/D

Date Format

M/D/Y

D/

M

/Y

<

Back

Fig. 4-29 Overall Block Diagram of Spectrum Analysis Menu (continued)

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Section 3 Description of “Spectrum Analysis” Menu

1. Frequency menu

Center Freq

Freq

Span

Start Freq

Stop Freq

Step Freq

Auto Man

Signal Track

Off

On

Signal Std

--

Channel

--

>

>

· [Center frequency]:

Press →[Center Freq] and set it with the number

keys on the front panel. Then select [GHz], [MHz], [kHz] or [Hz] in the

frequency unit menu, or set the center frequency with the [↑] or [↓] key or

knob.

·[Sp

an]: Press [Frequency]→[Span] to enable the span setting menu.

Refer to the [Span] menu description for specific details.

·[Starting frequency]:

Press [Frequency]→ [Start Freq], and set it with

number keys on the front panel. Select [GHz], [MHz], [kHz]

or [Hz]

in the frequency unit menu or set the starting frequency with the [↑] or [↓]

key or knob.

·[Stop Freq]:

Press [Frequency]→ [Stop Freq], and set it with number

keys on the front panel. Select [GHz], [MHz], [kHz] or [Hz] in the
frequency unit me

nu or set the stop frequency with the [↑] or [↓] key or

knob.

·[

Step frequency]: Press [Frequency]→ [Step Freq], and set it with number

keys on the front panel. Select [GHz], [MHz], [kHz] or [Hz] in the
frequency unit menu or set the step frequency wit

h the [↑] or [↓] key or

knob.

·[Signal Track Off On]:

Click this menu to enable or disable signal

tracking. After each sweeping, the active marker will be set at the peak
point of the signal by the signal tracking function. The peak frequency will
be set a

s the center frequency. By selecting [Signal On Off], the signal

drifting slowly will be automatically kept at the center of the screen.

[Signal Std]: Click it and the signal standard menu will pop up, including

soft menus such as [Head], [Tail], [Page Up], [Page Down] and
[Done]. Click [Done] to select the required signal standard file.

[Channel]: Click it to display the contents and number of the selected

signal standard.

[Special note]: The channel should be set based on the applied

signal standard; otherwise, the prompt that setting is not allowed will
pop up.

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2. Span menu

Span

Span

Full Span

Zero Span

Last Span

< Back

IF Outt >

[Span]: Press [Frequency]→ [Span] and set the span of the current

mode with number keys on the front panel. Select [GHz], [MHz],

[kHz] or [Hz] in the frequency unit menu or set the span with the [↑] or [↓]

key or knob. The span step should be 1, 2 or 5.

·[Ful

l span]: Press [Frequency]→ [Span]→ [Full Span], and set the span

of the current measurement mode as the maximum span. The full span is
related to the instrument mode. For

S3302G series spectrum analyzer, the

full span is 44.1GHz.

·[Zero span]:

Press [frequency]→[Span]→[Zero Span], and set the span

of the current measurement mode as the minimum span. Under the full
span, it should be set as 0Hz.

·[Last span]:

Press [Frequency]→ [Span]→ [Last Span], and set the

span of the current measurement mod

e as the last span.

·[IF Out]:

Press [Frequency]→ [Span]→ [IF Out] to activate the IF output

menu.

[Special note]: The full span and zero span function will be invalid

when some measurement functions are enabled.

[Special note]: The IF output menu, as a functional option, can only

be applied in the zero span mode.

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3. IF output menu

The zero-span IF output function is optional. The third or fourth IF signal output can be achieved through the IF
output interface under the zero span to meet the user’s measurement requirements.

IF Out

Off On

IF Out

Intermediate

frequency selection

3

IF

4

IF

< Back

·[Special note]:

The IF output menu, as a functional option, can only

be applied in the zero span mode.

·[IF Out Off On]:

Press [Frequency]→ [Span]→ [IF Out]→ [IF Out Off On]

and enable or disable IF output with keys.

·[IF Select 3IF 4IF]:

Press [Frequency]→[Span]→[IF Out]→[IF Select 3

IF

4IF] and select the 3IF or 4IF output with keys.

·[Back]:

Press [Frequency]→ [Span]→ [IF Out]→ [Back] to go back to

the span menu.

·[Special note]:

The IF output function is an option under zero span. If

3IF is selected, the IF output interface will

output the third IF

frequency, i.e. 140.2 5MH z; an d if 4IF is s ele cted, t he IF out put interf ace
will output the fourth IF frequency, i.e. 31.25MHz.

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4. Amplitude menu

Ref Level

0.0dBm

Amplitude

Ref Position

Atten

Auto

Man

Scale/Div

10.0dB

Scale Type

Logarithm

Linear

Units
dBm

Pre-amplifier
Off

On

>

·[Reference level]:

Press [Amplitude]→ [Ref Level] and set it with number

keys on the front panel. Select [dBm], [

-dBm], [mV] or [μ V] in the

frequency unit menu, or set the reference level with the [↑] or [↓] key or

knob.

·[Reference position]:

Press [Amplitude]→ [Ref Position], and select the

position of the reference line in the rectangular coordinate graph by clicking
corresponding number keys .

·[Atten Auto Man]:

Press [Amplitude]→[Atten Auto Man] to adjust the

input attenuation of the spectrum analyzer. In the AUTO m

ode, the input

attenuator is associated with reference level. Under Man Mode, use
number keys, stepping keys or knob to change the attenuation of the
attenuator. The attenuation range is 0dB to 50dB.

·[Scale/Division]:

Press [Amplitude]→[Scale/Div]. Adjust the size of the

vertical coordinate division on the screen, and set the value with number
keys on the front panel. Select the frequency unit, or set the value with the

[↑] or [↓] key or knob. The setting range is 0.1dB/division to 20dB/division.

The defau

lt setting is 10dB/division.

·[Scale Type Log Lin]:

Press [Amplitude]→ [Scale Type Log Lin], and set

the vertical

-axis scale as the logarithmic or linear scale. The default

logarithmic scale is in dBm, while the default linear scale is in mV.

·[Amplitude u

nit]: Press [Amplitude]→ [Units], and select the vertical-axis

unit, including [dBm], [dBmV], [dBuV], [Volt] and [Watt].

·[Pre

-amplifier Off On]: Turn on or off the pre-amplifier. This function

cannot be activated until the reference level is less tha

n -40dBm.

[Special note]: The level of the input signal must be +13dBm or less

before the pre

-amplifier is turned on; otherwise, the instrument will be

damaged.

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5. Bandwidth menu

RBW

Auto

Man

BW

VBW

Auto

Man

Average

Off

On

SPAN/RBW

100

RBW/VBW

1

Detector

Auto

>

·[RBW Auto Man]:

Press [BW]→[RBW Auto Man] and adjust the

resolution bandwidth within the range of 1Hz

-10MHz. The resolution

bandwidth can be changed with the number keys, step keys or knob in the
manual mode, by the step of 1, 3 or 10. It can be changed with the span
acc

ording to the SPAN/RBW value in the auto mode.

·[Video Bandwidth

Auto Man]: Press [BW]→[VBW Auto Man] to adjust

the video bandwidth in the active functional zone. The adjustment range is
1Hz

-10MHz. In the manual mode, the video bandwidth can be changed

with the number keys, step keys or knob in the manual mode, by the step
of 1,

3 or 10. In the auto mode, it can be changed with the span according

to the RBW/VBW value.

·[Average Off On]:

Press [BW]→ [Average Off On] to enable the

averaging function. The “Sample” mode of the detector will be enabled by
this function. At the same tim

e, traces will be continuously averaged to

achieve the smoothing effects.

·[

SPAN/RBW]: Press [BW]→[SPAN/RBW] to set the ratio of the current

span to resolution bandwidth. The value will be displayed in the input zone.
The default setting is 100. This ratio

can be applied in the associated mode

of the resolution bandwidth.

·[

RBW/VBW]: Press [BW]→[RBW/VBW] to set the ratio of the current

video bandwidth to resolution bandwidth. The default setting is 1. When the
resolution bandwidth changes, the video bandwid

th will automatically

change in the auto mode to meet the ratio requirements. This ratio will be
displayed in the input zone and applied in the associated mode of both
bandwidths. If a new ratio is selected, the video bandwidth will change to
meet the new

ratio requirements, while the resolution bandwidth will

remain unchanged.

·[Detector]:

Press [BW]→ [Detector], and the soft menu of detector mode

will pop up. Refer to the [Detector] menu description for details.

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6. Detector menu

Auto

Detector

Normal

Peak

NPeak

Sample

Average

RMS

< Back

·[Auto]:

The default setting of the detector menu is the normal mode.

[Normal]: If noise is detected in this mode, the positive and negative

peak measurement results will be displayed at the same time, so as to
achieve the display effects similar to those of the analog instrument. If the
signal is detected, only the positive peak wil

l be displayed. This is the most

commonly used detector mode. You can see the signal and noise floor at
the same time, with no signal loss.

[Peak]: Enable the positive peak mode. This mode can ensure that no

peak signal will be missing, thus facilitating m

easurement of signals close

to the noise floor. The positive peak detector is selected in the [Max Hold]
mode.

[Neg Peak]: Enable the negative peak mode. In this mode, the negative

peak level will be displayed on the trace. This is applied in self

-inspection

of the broadband MMW spectrum analyzer in most cases, and rarely
applied in measurement. The modulation envelope of AM signals can be
well reproduced. The positive peak detector is selected in the [Min Hold]
mode.

[Sample]: Enable the sample mode of the detector. This mode is

conducive for noise signal measurement. Compared with the normal mode,
noise can be better measured. This mode is generally applied in the video
average and noise marker func ti o n.

[Average]: Enable the average mode of the detector. The average of

sample data within each sampling interval will be displayed on the trace.

[RMS]: Enable the RMS mode of the detector. The RMS value of sample

data within each sampling interval will be displayed on the trace.

·[Back]:

Go back to the previous menu.

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7. Marker menu

Marker

1 2 3 4 5 6

Marker

Normal

Delta

Noise Marker

Off

On

Counter

Off On

Marker->

>

Off

All Off

·[Marker 1 2 3 4 5 6]:

Press [Marker]→[Marker 1 2 3 4 5 6] to select

various markers. Activate one marker and set it at the trace center. The
values will be displayed in the marker display zone in the right upper
corner of the screen.

·[Normal mode]:

Press [Marker]→ [Normal] to display the marker

frequency and amplitude. Move the active marker with the knob, step keys
or number keys. The default amplitude is in dB.

·[Delta mode]:

Press [Marker]→[Delta] to display the amplitude difference

and frequency difference (time difference

under zero bandwidt h) of two

markers. Move the active marker with the knob, step keys or number keys.
The default amplitude difference is in dB.

·[Noise Marker Off On]:

Press [Marker]→ [Noise Marker Off On] to

enable or disable the noise marker. If the ON

state is selected, the noise

marker will be active. Read the noise power at which noise is normalized to
1Hz bandwidth near the active marker. In this case, the “Sample” mode of
the detector is active.

·[Counter Mkr Off On]:

Press [Marker]→[Counter Mkr Off On] to enable

or disable the marker counter function. If no marker is active but the
marker counter function is enabled, one mobile marker will be activated in
the middle of the screen.

·[Marker]:

Press [Marker]→[Marker→], and soft menus related to the

m

arker functions will pop up. Such menus are related to the frequency and

bandwidth of the spectrum analyzer and the normal or differential mode of
the marker. By using such marker functions, the user can change spectrum
analyzer settings with the marker as

the reference.

·[Marker off]:

Press [Marker]→[Off] to disable the current marker and

related marker functions, such as: [Noise marker]. [Noise marker].

·[All Off]:

Press [Marker]→ [All Off] to disable all markers and related

marker functions, such as: [No

ise marker].

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Marker->

Center Freq

Marker->

Marker->
Step Freq

Marker->
Start Freq

光标->

终止频率

Marker->
Stop Freq

< Back

·[Marker→Center]:

Press [Marker]→ [Marker→]→ [Marker→Center].

The marker will move to the center frequency, and the center frequency
will be displayed on the screen.

·[Marker→CF Step]:

Press [Marker]→ [Marker→]→ [Marker→CF Step]

and set the step of the center frequency. The step is equal to the marker
frequency. If the differential marker function is activated, the frequency
step is equal to the frequency of the differential marker.

·[Marker→Start]:

Press [Marker]→ [Marker→]→ [Marker→Start], and

set the starting frequency as the marker frequency.

·[Marker→Stop]:

Press [Marker]→ [Marker→]→ [Marker→Stop] and set

the stop frequency as the marker frequency.

·[Back]:

Go back to the previous menu.

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8. Peak menu

Peak Search

Peak

Next Peak

Next Pk Left

Next Pk Right

Max Value

Min Value

Peak Track

Off On

Marker->

Center Freq

·[Maximum Peak]:

Press [Peak]→[Peak Search] to set one marker at the

peak of the trace. The marker frequency and amplitude will be displayed in
the right upper corner of the screen.

·[Next Peak]:

Press [Peak]→[Next Peak] to move the active marker to

next peak associated with the current marker location on the trace. The
lower peak can be rapidly found by repeatedly pressing this key.

·[Next Peak Left]:

Press [Peak]→[Next Pk Left] to find next peak on the

left side of t

he current marker location.

·[Next Peak Right]:

Press [Peak]→[Next Pk Right] to find next peak on

the right side of the current marker location.

·[Max Value]:

Press [Peak]→[Max Search] to set one marker at the lowest

point of the trace. The marker frequenc

y and amplitude will be displayed in

the right upper corner of the screen.

·[Min Value]:

Press [Peak]→[Min Search] to set one marker at the lowest

point of the trace. The marker frequency and amplitude will be displayed in
the right upper corner of the screen.

·[Peak Track Off On]:

Press [Peak]→[Peak Track Off On] to enable the

peak tracking

function. The current marker will search the peak once after

each sweeping. Any operation will not be allowed if the peak tracking
function is disabled.

·[Marker→]:

Press [Peak]→ [Marker→] to set the marker frequency as

the center frequency. This function

can be applied to rapidly move the

signal to the screen center.

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9 Mode menu

The default functional mode under the mode menu is the spectrum analyzer mode. You can add the following
functional options according to the needs: interference analyzer, AM-FM-PM analyzer, power meter, channel
scanner and field strength.

Spectrum
Analyzer

Mode

IA

AM-FM-PM

Analyzer

PM

Ch Scanner

Field Strength

·[Spectrum Analyser]:

Press [Mode]→ [Spectrum Analyzer] to enable the

spectrum analyzer mode.

·[Interference Analyzer]:

Press [Mode]→ [Interference Analyzer] to

enabl

e the interference analyzer mode. Refer to Chapter V “Interference

Analyzer Mode” for details.

·[AM

-FM-PM Demodulation]: Press [Mode]→ [AM-FM-PM Analyzer] to

enable the AM

-FM-PM analyzer mode. Refer to Chapter VII “AM-FM-PM

Analyzer Mode” for details.

·[Power meter]:

Press [Mode]→ [Power Meter] to enable the power meter

mode. Refer to Chapter VI “Power Meter Mode” for details.

·[Channel Scanner]:

Press [Mode]→ [Channel Scanner] to enable the

channel scanner mode. Refer to Chapter VIII “Channel Scanner M

ode” for

details.

·[Field Strength]:

Press [Mode]→ [Field Strength] to enable the field

strength measurement mode. Refer to Chapter IX “Field Strength
Measurement Mode” for details.

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10 Sweep menu

The sweep time refers to the time required for the LO tuning of the spectrum analyzer within the selected frequency
interval, and directly affects the time of one test. It generally changes with the span, resolution bandwidth and video
bandwidth. In the auto mode, the minimum sweep time will be adopted by the spectrum analyzer after
measurement setting. The sweep time can be increased in the manual mode to meet specific measurement needs.

The default sweep mode is linear sweeping, while list sweeping is optional. Multiple segment can be swept
continuously. The functions of editing, saving and recalling the list are available, thus facilitating the operation.

Sweep Time

Auto Man

Sweep

Sweep Type

Continuous

Single

Sweep Once

Triggering
[Free Run]

Sweeping mode

Linear List

Edit List

Save List

Load List

>

>

>

·

[Sweep Time Auto Man]: Press [Sweep]→[Sweep Time] to adjust the sweep

time of the spectrum analyzer. Use the number keys, step ke

ys or knob to adjust

the sweep time. If “Man” is underlined, the sweep time can be set manually. If
“Auto” is underlined, the sweep time will be automatically associated according to
the resolution bandwidth, frequency bandwidth and video bandwidth.

· [Swe

ep Cont Single]: Press [Sweep]→[Sweep Type] to enable the continuous

or single sweeping mode.

· [Re

-sweep]: Press [Sweep]→ [Sweep Once] to sweep once again.

· [Triggering]:

Press [Sweep]→ [Triggering] to select the triggering mode,

including [Free Run], [Video], [External], etc. Refer to the trigger menu for
details.

· [Sweep Mode Lin List]:

Press [Sweep]→[Sweep Mode] to enable the linear or

list mode. In the linear mode,

sweeping will be performed based on the linear

frequency interval, and the frequency interv als of adjacent measurem ent points are
the same. The list mode is opti onal, in whi ch sw e eping will be performe d ba sed o n
the set frequency range and other parameter

s in the edited list.

·[Edit list]:

This is optional. Press [Sweep]→[Edit List] to enable the soft menu of

list editing. You can use soft keys such as [Add Seg], [Delet e S eg] and [Delete A ll]
to manage and edit the sweep lit. The selected segment will be i

n green. After

editing the segment, press [Done] and [OK] to go back to the sweep menu.

· [Save List]:

This is optional. Press [Sweep]→[Save List] to save the current list

into the spectrum analyzer for future recalling.

· [Recall List]: This is optional. Press [Sweep]→[Recall List], and the list dialog

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box will pop up, in which you can recall or delete the required list.

11 Triggering menu

It is applied to select the triggering mode under “Sweep” or “Measure”, including [Free Run], [Video], [External],
[Slope] and [Delay]. The user can select the corresponding triggering mode based on the needs.

Free Run

Triggering

Video

External

1.

50V

Trigger Polarity

Positive

Negative

Trigger delayed

1.

000us

>

< Back

· [Free Trigger]:

When the previous single or continuous sweep finishes,

the next sweep or measurement is automatically triggered.

·

[Video Trigger]:

Set the trigger mode as [Video]. Once the input signal
exceeds the set video triggering level sweeping will be triggered. The trigger
level value can be set by the number keys, stepping keys or knob. The green
line on the screen indicates

the selected trigger level.

· [External triggering]:

Enable the [Extern al] mode. Set the triggering level

and synchronize “Sweep” or “Measure” with next voltage cycle.

· [Trigger Polarity]: Control the positive or negative polarity of level

triggering. The rising edge will be applied for triggering in the case of
positive polarity, and falling edge in the case of negative polarity.

· [Trigger delayed]:

The level triggering delay can be set. In this case, the

spectrum analyzer will wait for the delay time af

ter receiving the external

trigger signal and before sweeping.

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12 Trace menu

This is applied to display the trace. You can enable [clear], [max], [min], etc. based on various test needs. For
example, if the maximum holding function of the trace is enabled in drift signal measurement, the maximum peak
amplitude and frequency drift of the input signal will be display.

Trace

1

2 3

Trace

Clear Write

Max Hold

Min Hold

View

Blank

· [Trace 1 2 3]:

Press [Trace]→[Trace 1 2 3] to select the trace. Three

traces are available in the spectrum analyzer: 1, 2 and 3. The selected
trace number and status menu will be underlined.

· [Clear Write]:

Press [Trace]→[Clear Write] to refresh all data of the

previou

s trace and continuously display the signal received by the

spectrum analyzer in the sweep mode.

· [Max. Hold]:

Press [Trace]→[Max Hold] to hold the maximum value of

the points on the selected trace. In addition, the value will be updated
based on the new

maximum value detected in each sweeping. In the

“Auto” mode of the detector, the positive peak will be enabled.

· [Min Hold]:

Press [Trace]→[Min Hold] to hold the minimum value of the

points on the selected trace. In addition, the value will be updated bas

ed

on the new minimum value detected in each sweeping. In the “Auto” mode
of the detector, the negative peak will be enabled.

·[View]:

Press [Trace]→[View] to hold and display the amplitude data of

the selected trace. Such data are not updated in the sweep

ing mode of the

spectrum analyzer.

· [Blank]:

Press [Trace]→[Blank] to start background processing, without

display on the screen.

· [Special attention]:

If [Max Hold] and [Min Hold] are enabled at the

same time, the [Sample] function of the d et ect or will

be enabled under

the auto mode.

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13 Limit menu

Limit

Up Down

Limit

Limit

On

Off

Test

Off

On

Edit Limit

Offset

0.0

dB

Alarm

Off On

>

Save Limit

Recall Limit

>

· [Limit Upper Lower]:

Press [Limit]→[Limit Upper Lower] to set the

current limit as the upper or lower limit.

· [Limit

Off On]: Press [Limit]→ [Limit Off On] to enable or disable the limit

function.

· [Test Off On]:

Press [Limit]→ [Test Off On] to enable or disable the limit

test.

·[Edit Limit]:

Press [Limit]→ [Edit Limit], including [Frequency],

[Amplitude], [Add Point], [Delete Point], [Left Point], [Right Point]
and [Default Limit], to view the frequency and amplitude of the limit point,
and add or delete the limit point.

· [Offset]:

Press [Limit]→ [Offset] to set the offset allowance.

· [Alarm Off On]:

Press [Limit]→[Alarm Off On] to enable or disable the

audio alarm. The enabled audio alarm will be valid when the upper or lower
limit test is ON. The buzzer will utter a short sound if t

he value is beyond

the upper and lower limit during sweeping of the current screen.

· [Save Limit]:

Press [Limit]→ [Save Limit] to save the limit.

· [Recall Limit]:

Press [Limit]→ [Recall Limit], including [Head], [Tail],

[Page Up], [Page Down], [Done], [Delete] and [Cancel] to recall or
delete the saved limit.

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14 Measurement menu

Field Strength

Measure

Channel Pwr

OBW

Adjacent

Channel Power

Emission

Mask

C/N

>

Measure Off

More 1 of 2>

>

>

>

>

>

· [Field Strength]:

Press [Measure]→[Field Strength] to enable the field

strength measurement function and recall the related functional menu.
Refer to the [Field Strength] menu descr i pti o n for details.

· [Channel Power]:

Press [Measure]→[Channel Power] to enable the

channel

power function and recall the related functional menu. Refer to

[Channel Power] menu description for details.

· [Occupied Bandwidth]:

Press [Measure]→[OBW] to enable the

occupied bandwidth function and recall the related functional menu. Refer
to [OBW] me

nu description for details.

· [Adjacent Channel Power]:

Press [Measure]→[ACPR] to select the

adjacent channel power function and recall the related functional menu.
Refer to [ACPR] menu descri pti on for det ai l s.

· [Emission mask]:

Press [Measure]→[Emission Mask] to enable the

emission mask function and recall the related functional menu. Refer to
[Emission Mask] menu description for details.

· [C/N]:

Press [Measure]→[C/N] to enable the C/N measurement function

and recall the relate

d functional menu. Refer to [C/N] menu description for

details.

· [Measurement OFF]:

Press [Measure]→ [All Meas Off] to disable

measurement functions.

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Tune Listen

IQ Capture

Measure

Measure Off

More 2 of 2 >

>

>

· [Audio Demodulation]:

Press [Measure]→ [More 1/2]→ [Tune Listen]

to enabl

e the tune listening function. Refer to [Tune Listen] menu

description for details.

·[IQ Capture]:

Press [Measure]→ [More 1/2]→ [IQ Capture] to enable the

IQ capture function. Refer to [IQ Capture] menu description for details.

The spectrum analyzer has the function of field strength measurement, including soft menus such as [Field
Strength Off On], [Recall Antenna], [Edit Antenna] and [Save Antenna]. The field strength can be rapidly
tested with such menus and corresponding test antennas.

Field Strength

Off

On

Field Strength

Recall

Antenna

Edit Antenna

>

< Back

>

Save Antenna

>

· [Field Strength Off On]:

Press [Measure]→ [Field Strength]→ [Field

Strength Off On] to enable or disable the field strength measurement
function.

· [Recall Antenna]:

Press [Measure]→ [Field Strength]→ [Recall

Antenna], and soft menus such as [Head], [Tail], [Page Up], [Page
Down], [Done] and [Delete] will pop up, you can select and recall the
saved antenna factor file in the spectrum analyzer.

·[Edit Antenna]:

Press [Measure]→ [Field Strength]→ [Edit Antenna],

and soft menus such as [Add Point], [Delete Point], [Delete All],
[Done] and [Cancel] will pop up. You can edit the antenna factor.

·[Save Antenna]:

Press [Measure]→ [Field Strength]→ [Save Antenna] to

save the antenna factor.

· [Back]:

Press [Measure]→ [Field Strength]→ [Back] to exit the field

strength menu and go back to the “Measure” menu.

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The spectrum analyzer has the function of channel power measurement. You can measure the channel power of
the signal by setting relevant parameters in the functional menu and selecting the appropriate resolution bandwidth
and span. Refer to the channel power measurement requirements in the first section of this chapter for specific
operations.

Channel Pwr

Off

On

Channel Pwr

Center Freq

Channel BW

Span

< Back

>

· [Channel Power Off On]:

Press [Measure]→ [Channel Power]→

[Channel Power Off On] to enable or disable the channel power
measurement function.

· [Center frequency]:

Press [Measure]→ [Channel Power]→ [Center

Freq] and set the center frequency

with number keys.

· [Channel BW]:

Press [Measure]→ [Channel Power]→ [Channel BW]

and set the channel bandwidth with number keys.

· [Span]:

Press [Measure]→ [Channel Power]→ [Span] and set the

channel span with number keys.

· [Special attention]:

The channel power bandwidth refers to the

frequency width of the power displayed by the spectrum analyzer
within the bandwidth, while the channel power span refers to the
sweeping frequency range of the spectrum analyzer.

The channel

power span should be more than o

r equal to the channel power

bandwidth. Otherwise, the channel power bandwidth will be
automatically set to be equal to the channel power span.

The ratio of

the channel power span to channel power bandwidth is a constant.

It

remains unchanged when the chan

nel power span is changed. You

can change this ratio by changing the channel power bandwidth.

For

example, when the channel power span is doubled, the channel power
bandwidth will be increased by the same times.

Results can be rapidly, clearly and accurately in occupied bandwidth measurement of the spectrum analyzer.
Depending on the modulation mode, two methods can be applied to calculate the occupied bandwidth: power
percentage and power drop XdB. The user can select the appropriate occupied bandwidth measurement method
according to the needs. Refer to the occupied bandwidth measurement requirements in the first section of this
chapter for specific operations.

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OBW

Off

On

OBW

Measurement

Method

Percent XdB

Percent

99.00%

XdB

-3.00dB

Span

< Back

>

· [OBW Off On]:

Press [Measure]→ [OBW]→ [OBW Off On] to enable or

disable the occupied bandwidth measurement function.

· [Measurement Method ]:

Press [Measure]→ [OBW]→ [Method % XdB]

to select the appropriate test method, including percentage and drop XdB.
In the percentage method, the occupied bandwidth of the signal is obtained
by calculating the bandwidth of the frequency of certain percentage to the
total power of the transmitted power, and the power percentage can be set
by the user. In the drop XdB method, the occupi

ed bandwidth is defined as

follows: spacing between two frequency points corresponding to signal
power drop by XdB on both sides of the frequency point where the signal
peak power is. The signal power drop XdB can be set by the user.

· [Percentage]:

Press [Measure]→ [OBW]→ [%] to set the power

percentage in the percentage method.

·[XdB]

: Press [Measure]→ [OBW]→ [XdB] to set the signal power drop

XdB in the power drop XdB method.

· [Span]:

Press [Measure]→ [OBW]→ [Channel Sweep] to set the

sweeping frequency bandwidth of occupied bandwidth measurement.

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The spectrum analyzer has the function of adjacent channel power ratio measurement. The user can obtain
measurement results by setting relevant parameters of the channel. By using the limit test function, the user can
define the adjacent channel limits so as to easily observe whether the adjacent channel power exceeds the set
range. Refer to the requirements of adjacent channel power ratio measurement in the first section of this chapter for
specific operations.

Adjacent Channel

Power

Off

On

Center Freq

Adjacent Channel

Power

Ch Spacing

3.000MHz

Main Ch BW

3.000MHz

Adj Ch BW

3.000MHz

< Back

More 1 of 2

>

· [ACPR Off On]:

Press [Measure]→ [ACPR]→ [ACPR Off On] to enable

or disable the ACPR measurement function.

· [Center frequency]:

Press [Measure]→ [ACPR]→ [Center Freq] and set

the center frequency with number keys.

· [Main Channel BW]:

Press [Measure]→ [ACPR]→ [Main Ch BW] and

set the main channel bandwidth with number keys.

· [Adjacent Channel BW]:

Press [Measure]→ [ACPR]→ [Adj Ch BW] and

set the adjacent channel bandwidth with number keys.

· [Channel Spacing]:

Press [Measure]→ [ACPR]→ [Ch Spacing] and set

the channel spacing with number keys.

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Limit Test

Off

On

Upper Limit

0.0dB

Adjacent Channel

Power

< Back

Lower Limit

0.0dB

More 2 of 2

· [Limit Test Off On]:

Press [Measure]→ [ACPR]→ [Limit Test Off On] to

enable or disable the upper and lower limit test of the adjacent channel
power.

· [Upper Limit]:

Press [Measure]→ [ACPR]→ [Upper Limit] to set the

upper limit of the power of the adjacent channel test.

· [Lower Limit]:

Press [Measure]→ [ACPR]→ [Lower Limit] to set the

lower limit of the power of the adjacent channel test.

[Special note]:

If ACPR exceeds the set limit in the limit test, the

screen background will turn red as the mark.

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The spectrum analyzer has the C/N measurement function, which is applied to measure the ratio of the carrier
power to noise power.

C/N

Off

On

Center Freq

C

/N

<

Back

Carrier BW

3.000MHz

Noise BW

3.000MHz

Freq Offset

3.000MHz

· [C/N Off On]:

Press [Measure]→ [C/N]→ [C/N Off On] to enable or

disable the C/N function.

· [Center frequency]:

Press [Measure]→ [C/N]→ [Center Freq] and set

the center frequency of measurement with number keys.

· [Carrier BW]:

Press [Measure]→ [C/N]→ [Carrier BW] and set the

carrier bandwidth with number keys. The default setting is 3MHz.

· [Noise Bandwidth]:

Press [Measure]→ [C/N]→ [Noise BW] and set the

noise bandwidth with number keys. The default setting is 3MHz.

· [Frequency Offse t]:

Press [Measure]→ [C/N]→ [Offset] and set the

frequency offset with number keys. The default setting is 3MHz.

The emission mask function is applied to measure whether the signal power exceeds the mask limits, where the
limits are recalled as the masks. The mask can be moved right and left or up and down according to the center
frequency and reference power. In the mask, the limit center is always moved right and left to the center frequency,
and also moved up and down to the reference power point based on the calculated reference power.

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Emission Mask

Off

On

Emission Mask

Channel BW

1.000MHz

Recall Limit

as Mask

Reference power

Peak

Channel

Peak Marker
Off

On

终止频率

步进频率

自动

手动

信号跟踪

关

开

Page Up

Page Down

<

Back

>

· [Emission Mask Off O n ]:

Press [Measure]→ [Emission Mask]→

[Emissi

on Mask Off On] to enable or disable the emission mask function.

·[Channel BW]:

Press [Measure]→ [Emission Mask]→ [Channel BW] and

set the reference channel bandwidth with number keys.

· [Recall Limit]:

Press [Measure]→ [Emission Mask]→ [Recall Limit], and

relevant soft menus will pop up, including [Head], [Tail], [Page Up],
[Page Down], [Done] and [Delete]. The user can select the limit file to
be recalled.

· [Reference power ]:

Press [Measure]→[Emission Mask]→[Ref Power] to

set the reference power se

tting mode. The peak power or channel power

may be used as the reference power.

· [Peak Markers Off On]:

Press [Measure]→ [Emission Mask]→ [Peak

Markers Off On] to enable or disable the peak marker.

· [Page Up]:

Press [Measure]→ [Emission Mask]→ [Page Up] to view the

information on the previous pag e.

· [Page Down]:

Press [Measure]→ [Emission Mask]→ [Page Down] to

view the information on the following page.

By using the IQ capture function, the original IQ data can be captured according to the capture time, sample rate
and capture mode set by the user, and data files can be saved for data analysis.

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IQ Capture

Off

On

Start Capture

IQ Capture

Capture Time

1.000ms

Capture Mode

Single

Continuous

Sample Rate

5.000MHz

Triggering

[Free Run]

Save Name

[IQCapt...]

< Back

>

· [IQ Capture Off On]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→

[IQ Capture Off On] to enable or disable the IQ capture functi

on.

· [Start Capture]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→ [Start

Capture] to start IQ capture.

· [Capture time]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→

[Capture Time] to set the IQ capture time.

· [Capture Mode]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→

[Capture Mode] to enable the single or continuous IQ capture. In the single
mode, the data will be captured once only. In the continuous mode, the
data will be captured once after each sweeping of the stroke, and

capturing

will not be stopped until otherwise set by the user.

· [Sample rate]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→ [Sample

Rate] to set the sample rate of IQ capture.

· [Triggering]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→

[Triggering] to set t

he triggering mode, including [Free Run] and

[External]. In the [External] mode, [Slope] and [Delay] can be set.

· [Save Name]:

Press [Measure]→ [More 1/2]→ [IQ Capture]→ [Save

Name] to save the captured data.

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Tune Listen

Off On

Tune Listen

Demod Type

FM

Demod Time

100

.00

ms

Demodulation Mode

Continuous OFF

Continuous

Volume

95

信号跟踪

关 开

< Back

>

>

· [Tune

Listen Off On]: Press [Measure]→ [More 1/2]→ [Tune Listen]→

[Tune Listen Off On] to enable or disable the tune listening function.

· [Demodulation type]:

Press [Measure]→ [More 1/2]→ [Tune Listen]→

[Demod Type] to set the demodulation type. The following d

emodulation

types are available: [FM], [AM], [USB] or [LSB].

· [Demodulation Time]:

Press [Measure]→ [More 1/2]→ [Tune Listen]→

[Demod Time] to set the listening time.

[Listen Mode]:

Press [Measure]→ [More 1/2]→ [Tune Listen]→ [Listen

Mode] to set the

listening mode. The default setting is the intermittent

listening mode, in which the data will be listened for the set listening time
after sweeping of one screen, and the above cycle is repeated. In the
continuous mode, data will not be swept but will be

continuously listened

after sweeping of one screen.

· [Volume]:

Press [Measure]→ [Tune Listen]→ [Volume] to set the

loudspeaker volume in the tune listening mode.

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15 File menu

Save State

Save/Recall

Recall State

Save Data

Recall Data

Save Pic

Default State

>

File Manager

Location

[

Internal]

>

>

>

· [Save Status]:

Press [Save/Recall]→[Save State] to save the current

sweeping parameters.

· [Recall state]:

Press [Save/Recall]→ [Recall State], and the state file list

will pop up, including relevant soft menus such as [Head], [Tail],
[Page Up], [Page Down], [Done]

and [Delete]. You can read the

saved state file and recall the corresponding state parameters into current
sweeping.

· [Save Data]:

Press [Save/Recall]→ [Save Data] to save the trace data.

· [Recall Data]:

Press [Save/Recall]→ [Recall Data], and the data file list

will pop, including relevant soft menus such as [Head], [Tail], [Page
Up], [Page Down], [Done] and [Delete]. You can read the saved data
file and recall the corresponding state parameters into current sweeping.

· [Save Pic]:

Press [Save/Recall]→ [Save Pic] to capture the current

screen picture.

· [Default State]:

Press [Save/Recall]→[Default State] to recover the

default setting.

· [File Management]:

Press [Save/Recall]→ [File Manager] and the file

manager menu will pop up, including relevant soft menus such as [Src
File], [Dst File], [Copy] and [Delete File]. You can copy and delete
the file.

· [Location]:

Press [Save/Recall]→[Location] to select the saving location.

“Internal” means the internal memory, while “Others” means the memory
with the USB interface and SD card. If the security characteristics are
selected, the internal memory will not be available

.

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16 System menu

The system menu lists the system-related settings of S3302 series spectrum analyzer. In addition to the date/time,
date format, system language, network setting and frequency reference, characteristic menus such as the LO
nulling alignment, GPS positioning (optional) and power saver are available.

S3302 series spectrum analyzer has the function of LO nulling alignment, which is conducive for LO null calibration
when required. To accurately measure the amplitude of the signal with the frequency below 5MHz, attention should
be paid to the zero-frequency signal. If the zero-frequency signal is above >-20dBm, LO null calibration should be
performed so as to prevent gain compression caused by too large amplitude of the zero-frequency signal.

The optional GPS positioning function of S3302 series can be achieved with the external GPS antenna. The user
can view the number of current satellites in service and the longitude, latitude and altitude information. This function
is applicable to accurate positioning in fields.

In the power saver mode, the spectrum analyzer will enter the sleep state in the case of no operation within the
sleep time, including shutdown of the LCD, internal module power, etc. If any key is pressed again, the spectrum
analyzer will exit the sleep state and change into the normal operating mode.

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AliLO Nulling

System

Date Time

Display

GPS

LAN

>

Frequency reference

Internal

External

More 1 of 2 >

>

>

>

Reference output

Off

On

[AliLO Nulling]: Press [System]→[AliLO Nulling] to enable the LO

nulling alignment function. The user can easily apply this function when
required. Alignment results will be saved in the internal memory of the
instrument.

· [Date]:

Press [System]→ [Date/Time] to set the date and ti m e.

· [Display setting]:

Press [System]→ [Display] to set the display mode,

including relevant settings of [Default], [Black & White], [Night Vision]
and [Brightness].

·[

GPS]: Press [System]→ [GPS] and soft menus related to GPS will pop

up, i

ncluding [GPS Off On], [GPS Info] and [Reset]. You can enable

or disable the GPS function, view GPS details and reset GPS.

· [Special note]:

The GPS positioning function is optional.

· [Internet setting]:

Press [System]→ [LAN] to set the network setting of

the spectrum analyzer, including [Prev], [Next], [IP], [Mask] and
[Gateway].

· [Freq Ref Int Ext]:

Press [System]→[Freq Ref Int Ext] to select the

internal or external frequency reference according

to the needs.

· [Ref Output Off On]:

Press [System]→[Ref Output Off On] to enable or

disable the interval reference according to the needs in the internal
reference mode.

· [Special note]:

The external reference frequency must be

10MHz±100Hz, and the ampli

tude must be 0dBm (range: -2dBm to

+10dBm).

The external reference frequency must be applied through

the “10MHz reference input” of the cover.

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Language

System

Power Saver

System Info

Error Log

Title

Off

On

>

>

>

Admin

More 2 of 2 >

Date Format

>

· [System language]:

Press [System]→ [Language] to set the language,

including [

simplified Chinese] and [English].

· [Power Saver]:

Press [System]→ [Power Saver] to set the auto sleep

and auto shutdown mode, including [Sleep Off On], [Sleep], [Shut
Down Off On] and [Shut Down], so as to minimize power loss.

· [System informati o n ]:

Press [System]→[System Info] to view the

system information, including the application software version, custom
image version, etc.

· [Date Format]:

Press [System]→ [Date Format] to set the date format.

· [Error Log]:

Press [System]→ [Error Log] and relevant soft menus will

pop up, including [Head], [Tail], [Page Up], [Page Down] and
[Delete All]. You can view relevant error information.

· [Tip Off On]:

Press [System]→ [Tip Off On] to select the current title of

the name.

· [System Admin]:

Press [System]→[Admin] and enter the administrator

password to perform system administration and setting.

[Special note]:

The administration function is only available to the

factory commissioning personnel or technical support personnel
when required, and must not b

e applied by the user; otherwise, the

instrument may be damaged.

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Chapter V Interference Analyzer Measurement Mode (optional)

Section 1 Introduction to Typi c al Meas ure me nts

The interference analyzer mode is an extension of the spectrum analyzer mode. In S3302 series spectrum analyzer,
the interference analyzer mode is divided into the following three modes:

Spectrum measurement (refer to the relevant chapter of spectrum analysis requirements for specific operations, not
repeated here);

Spectrogram measurement;
Received signal strength indicator (RSSI) measurement.

All operations in this chapter are based on the interference analyzer mode, which will not be described separately below.

1 Spectrogram measurement

The cyclic or intermittent signal can be easily observed in the 3D spectrogram display, i.e. frequency, amplitude and
time. The time signal amplitudes are reflected by various colors in the spectrogram display.

In order to better observe the measured signal, the following steps can be taken:

a) Press [Frequency]→[Span]→[Full Span] and [Peak] to obtain the maximum value of the current signal. Then

press [Marker→Center] and set the current peak as the center frequency. In this case, the maximum value will
be displayed at the center of the trace zone.

b) Press [BW]→[RBW Auto Man] and set the appropriate resolution bandwidth with the number keys, [↑], [↓] or

knob. Similarly, set the appropriate video bandwidth.

c) Press [Amplitude]→[Ref Level] and set the current maximum point close to the top of the display zone. Press

[Scale/Div] and set the appropriate scale/division to facilitate viewing

d) Press [Auto Save]→ [Sweep Interval] and set the sweep interval.

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If the sweep interval is more than 0, the trace will be in the maximum holding state, so as to ensure that the maximum value of the signal in each sweeping
will be displayed on the screen.

e) Press [Sweep Time] and set the record time. Then press [Auto Save Off On] to enable the auto saving mode. In

this case, the data will be saved automatically after sweeping of one screen.

f) Press [Auto Save]→[Time Cursor] and move the horizontal line with the number keys, [↑], [↓] or knob in the

vertical direction of the spectrogram. The following spectrogram will display the trace information on the line.

If the time marker value is more than 0., the trace and spectrogram will not be refreshed.

g) The interference analyzer mode of S3302 series spectrum analyzer involves six independent markers, which are

used for reading the amplitude and f r equ ency cor r es po n di ng of the mar ker . S peci fi c oper ations are as follows:

[Maker]→[Marker 1 2 3 4 5 6].

h) Press [Save/Recall]→[Save Pic] to save the current spectrogram information in the picture form.

The spectrogram test structure is in Fig. 5-1 (the displayed contents vary from parameter settings, and Fig. 5-1 only
shows an example).

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Fig. 5-1 Interference Analyzer Spectrogram

2 RSSI measurement

RSSI measurement is mainly applied to measure the strength changes of one CW signal within a certain period.
In order to better observe the measured signal, the following steps can be taken:

a) Press [Auto Save]→[Sweep Interval] to set the sweep interval, which represents the sweep time between two
adjacent points in each sweeping.

b) Press [Auto Save]→[Sweep Time] to set the span record time. After reaching the set span time, the display

interface will not be refreshed.
c) Press [Auto Save]→[Auto Save Off On] to enable the auto saving function. The data will be automatically saved

into the file after sweeping of each screen.

If the span time is set, only the latest data points on the screen will be recorded, instead of all data points within the whole span.