Anritsu Site Master S331L User manual

Maintenance Manual
Site Master™
S331L
Handheld Cable and Antenna Analyzer
Featuring Classic and Advanced Modes
2 MHz to 4 GHz Cable & Antenna Analyzer
50 MHz to 4 GHz Power Meter
Anritsu Company
490 Jarvis Drive
Morgan Hill, CA 95037-2809
USA
Part Number: 10580-00323
Revision: B
Published: August 2012
Copyright 2012 Anritsu Company

TRADEMARK ACKNOWLEDGMENTS
Windows, Windows XP, and Windows CE are all registered trademarks of Microsoft Corporation.
Acrobat Reader is a registered trademark of Adobe Corporation.
Site Master is a trademark of Anritsu Company.
NOTICE
Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers as a guide for the
proper installation, operation and maintenance of Anritsu Company equipment and computer programs. The
drawings, specifications, and information contained herein are the property of Anritsu Company, and any
unauthorized use or disclosure of these drawings, specifications, and information is prohibited; they shall not be
reproduced, copied, or used in whole or in part as the basis for manufacture or sale of the equipment or software
programs without the prior written consent of Anritsu Company.
UPDATES
Updates, if any, can be downloaded from the Documents area of the Anritsu Website at:
http://www.anritsu.com
For the latest service and sales contact information in your area, please visit:
http://www.anritsu.com/contact.asp

S331L MM PN: 10580-00323 Rev. B Safety-1
Safety Symbols
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Company uses the
following symbols to indicate safety-related information. For your own safety, please read the information
carefully before operating the equipment.
Symbols Used in Manuals
Safety Symbols Used on Equipment and in Manuals
The following safety symbols are used inside or on the equipment near operation locations to provide
information about safety items and operation precautions. Ensure that you clearly understand the meanings of
the symbols and take the necessary precautions before operating the equipment. Some or all of the following
five symbols may or may not be used on all Anritsu equipment. In addition, there may be other labels attached
to products that are not shown in the diagrams in this manual.
Danger
This indicates a risk from a very dangerous condition or procedure that could result in
serious injury or death and possible loss related to equipment malfunction. Follow all
precautions and procedures to minimize this risk.
Warning This indicates a risk from a hazardous condition or procedure that could result in
light-to-severe injury or loss related to equipment malfunction. Follow all precautions
and procedures to minimize this risk.
Caution
This indicates a risk from a hazardous procedure that could result in loss related to
equipment malfunction. Follow all precautions and procedures to minimize this risk.
This indicates a prohibited operation. The prohibited operation is indicated symbolically
in or near the barred circle.
This indicates a compulsory safety precaution. The required operation is indicated
symbolically in or near the circle.
This indicates a warning or caution. The contents are indicated symbolically in or near
the triangle.
This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled.

Safety-2 PN: 10580-00323 Rev. B S331L MM
For Safety
Warning Always refer to the operation manual when working near locations at which
the alert mark, shown on the left, is attached. If the operation, etc., is
performed without heeding the advice in the operation manual, there is a
risk of personal injury. In addition, the equipment performance may be
reduced.
Moreover, this alert mark is sometimes used with other marks and
descriptions indicating other dangers.
Warning
When supplying power to this equipment, connect the accessory 3-pin
power cord to a 3-pin grounded power outlet. If a grounded 3-pin outlet is
not available, use a conversion adapter and ground the green wire, or
connect the frame ground on the rear panel of the equipment to ground. If
power is supplied without grounding the equipment, there is a risk of
receiving a severe or fatal electric shock.
Warning
This equipment can not be repaired by the operator. Do not attempt to
remove the equipment covers or to disassemble internal components.
Only qualified service technicians with a knowledge of electrical fire and
shock hazards should service this equipment. There are high-voltage parts
in this equipment presenting a risk of severe injury or fatal electric shock to
untrained personnel. In addition, there is a risk of damage to precision
components.
Warning
Use two or more people to lift and move this equipment, or use an
equipment cart. There is a risk of back injury if this equipment is lifted by
one person.
Caution
Electrostatic Discharge (ESD) can damage the highly sensitive circuits in
the instrument. ESD is most likely to occur as test devices are being
connected to, or disconnected from, the instrument’s front and rear panel
ports and connectors. You can protect the instrument and test devices by
wearing a static-discharge wristband. Alternatively, you can ground
yourself to discharge any static charge by touching the outer chassis of the
grounded instrument before touching the instrument’s front and rear panel
ports and connectors. Avoid touching the test port center conductors
unless you are properly grounded and have eliminated the possibility of
static discharge.
Repair of damage that is found to be caused by electrostatic discharge is
not covered under warranty.

S331L MM PN: 10580-00323 Rev. B Contents-1
Table of Contents
Chapter 1—General Information
1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2 Anritsu Customer Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-3 Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-4 Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-5 Firmware Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2—S331L Performance Verification
2-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2 Frequency Accuracy Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-3 Return Loss Accuracy Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-4 Power Meter Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-5 InstaCal Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Chapter 3—Battery Information
3-1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Chapter 4—Assembly Replacement
4-1 Replacing the S331L Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-2 Removing the Rear Case to Gain Access to Internal Assemblies . . . . . . . . . . . . . . . . . . . . . . 4-3
4-3 Main/VNA PCB Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
4-4 InstaCal / Power Meter Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
4-5 LCD and Touch Screen Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
4-6 Keypad PCB and Rubber Keypad Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
4-7 SOM Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Chapter 5—Troubleshooting
5-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Appendix A—Test Records
A-1 Test Records for Cable and Antenna Analyzer Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
A-2 Test Records for Power Meter Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
A-3 Test Records for InstaCal Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Contents-2 PN: 10580-00323 Rev. B S331L MM

S331L MM PN: 10580-00323 Rev. B 1-1
Chapter 1 — General Information
1-1 Introduction
This manual provides maintenance instructions for Anritsu Site Master Model S331L. The manual includes:
•General information in this chapter, including:
•Verification Equipment List (Table 1-1)
•Replaceable parts list (Table 1-2)
•Performance verification procedures (Chapter 2, “S331L Performance Verification”)
•Battery pack information (Chapter 3, “Battery Information”)
•Parts replacement procedures (Chapter 4, “Assembly Replacement”)
•Troubleshooting procedures (Chapter 5, “Troubleshooting”)
•Blank test records are included in Appendix A.
•Copy the blank test records from Appendix A and use them to record measured values. These test
records form a record of the performance of your instrument. Anritsu recommends that you make a
copy of the blank test records to document the measurements each time a Performance
Verification is performed. Continuing to document this process each time it is performed provides
a detailed history of instrument performance, which can allow you to observe trends.
Familiarity with the basic operation of the front panel keys (for example, how to change measurement mode,
preset the unit, or the meaning of soft key or submenu) is assumed. Refer to the instrument’s User Guide for
additional information.
1-2 Anritsu Customer Service Centers
For the latest service and sales information in your area, please visit the following URL:
http://www.anritsu.com/contact.asp
From here, you can select the latest sales, select service and support contact information in your country or
region, provide online feedback, complete a “Talk to Anritsu” form to have your questions answered, or obtain
other services offered by Anritsu.
Updated product information can be found on the Anritsu web site:
http://www.anritsu.com/
Search for the product model number. The latest documentation is on the product page under the Library tab.
Example URL for Site Master S331L:
http://www.anritsu.com/en-us/products-solutions/products/s331l.aspx
Caution Before making any measurement, verify that all equipment has warmed up for at least 30 minutes.

1-3 Recommended Test Equipment General Information
1-2 PN: 10580-00323 Rev. B S331L MM
1-3 Recommended Test Equipment
The following test equipment is recommended for use in testing and maintaining the S331L. Table 1-1 is a list
of test equipment that is required for verifying the S331L Cable and Antenna Analyzer.
Table 1-1. Test Equipment Required for Cable and Antenna Analyzer Verification and Calibration
Instrument Critical Specification Recommended Manufacturer/Model
Frequency Counter Frequency: 2 GHz Anritsu Model MF2412B
Open/Short Frequency: DC to 18 GHz Anritsu Model 22N50
Precision Load Frequency: DC to 18 GHz
Return Loss: 40 dB min.
Anritsu Model SM/PL-1
6 dB Offset Termination Frequency: DC to 4.0 GHz Anritsu Model SC5905
20 dB Offset Termination Frequency: DC to 4.0 GHz Anritsu Model SC5906
Synthesized Signal Source Frequency: 0.1 Hz to 6 GHz
Power Output to +13 dBm
Anritsu Model MG3692B with
options 2, 3, 4, 22, 15
Power Meter Power Range: −70 dBm to +20 dBm Anritsu Single Channel Model ML2437A
Power Sensor Frequency: 100 kHz to 18 GHz
Power Range: –55 dBm to +20 dB
Anritsu Model SC7400
Power Splitter Frequency: DC to 18 GHz Aeroflex/Weinschel Model 1870A
RF Coaxial Cable Frequency: DC to 18 GHz
N(m) to N(m), 50 ohm
Anritsu Model 15NN50-0.6B
RF Coaxial Cable Frequency: DC to 18 GHz N(m) to N(f),
50 ohm
Anritsu Model 15NNF50-0.6B

General Information 1-4 Replaceable Parts
S331L MM PN: 10580-00323 Rev. B 1-3
1-4 Replaceable Parts
1-5 Firmware Updates
Refer to the S331L User Guide (Anritsu Part Number 10580-00321) for the procedure on updating the
firmware.
Table 1-2. List of Replaceable Parts
Part Number Description
ND72098 S331L MB/VNA PCB Assembly Including SOM Module and Shields
3-2000-1674 SOM Module
ND72099 Power Meter / InstaCal Module with 4 screws
3-15-160 LCD Display including Touch Screen
2000-1676-R Soft Carrying Case
3-72223 Stylus Pen and Leash (attaches to the Soft Carrying Case)
ND74880 Front Case with model ID label, Encoder and Knob
ND74881 Rear Case with 4 screws, Anritsu Label, SN Label and Windows License
3-72332-1 Model S311L ID Label
ND74882 Battery Cover with 6 screws
ND74886 Li-ion Batteries (Qty 2)
ND74895 USB Cover
ND74883 Top Plate with 6 screws
3-72321 Top Bumper
3-72307-2 Bottom Bumper
ND74884 N Connector Plate with cover, nut and washer
3-72317-1 Keypad to Main board cable
3-70674-3 LCD to Main board cable
40-187-R AC to DC Power Converter
ND72100 Keypad PCB, includes speaker and 8 screws
3-71015 Rubber Keypad
3-61360-2 Knob (excluding encoder)
3-72305 Front LCD Gasket
3-72315 Rear LCD Gasket
ND74885 Bracket for the Main Board, includes battery foam and 8 screws
2000-1687-R N-connector Thumb Wheel

1-5 Firmware Updates General Information
1-4 PN: 10580-00323 Rev. B S331L MM

S331L MM PN: 10580-00323 Rev. B 2-1
Chapter 2 — S331L Performance Verification
2-1 Introduction
These tests verify the Cable and Antenna Analyzer, Power Meter and InstaCal functionality on the S331L
Site Master.The functional tests include:
•“Frequency Accuracy Verification” on page 2-1
•“Return Loss Accuracy Verification” on page 2-2
•“Power Meter Verification” on page 2-3
•“InstaCal Verification” on page 2-5
2-2 Frequency Accuracy Verification
The following test is used to verify the CW frequency accuracy of the S331L’s RF Source in Cable and Antenna
Analyzer mode.
Equipment Required
•Frequency Counter Frequency: 2 GHz Anritsu Model MF2412B
•RF Coaxial Cable Freq: DC to 18 GHz, N(m) to N(m), 50 Ohm, Anritsu Model 15NN50-0.6B
Procedure
1. Verify that the S331L is in Cable and Antenna Analyzer mode and preset the unit.
2. Press ESC then the Sweep (3) key.
3. Verify that the RF Immunity is set to High.
4. Press the Freq/Dist menu key and set both the Start Freq and Stop Freq to 1 GHz.
5. Connect the RF cable from the S331L RF Out/Reflect In to the Frequency Counter.
6. Record the frequency data in Table A-1, “Cable and Antenna Analyzer Frequency Accuracy” on page A-2.
7. Press the Freq/Dist menu key and set both the Start Freq and Stop Freq to 3 GHz.
8. Record the frequency data in Table A-1.

2-3 Return Loss Accuracy Verification S331L Performance Verification
2-2 PN: 10580-00323 Rev. B S331L MM
2-3 Return Loss Accuracy Verification
The following test can be used to verify the accuracy of return loss measurements. Open/Short/Load calibration
of the S331L in Cable and Antenna Analyzer mode is required for this test.
Equipment Required
•Open/Short Frequency: DC to 18 GHz Anritsu Model 22N50
•Precision Load: Anritsu Model SM/PL-1
•6 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5905
•20 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5906
Procedure
1. Verify that the S331L is in Cable and Antenna Analyzer mode and preset the unit.
2. Press the Measurement menu key, then press the Return Loss soft key.
3. Press the Calibration menu key.
4. Press the Start Calibration soft key. Follow the instructions on the screen using an OSL Cal Method and the
Standard Cal Type to perform a calibration.
5. After the calibration is complete, install the 6 dB offset termination.
6. Press the AutoScl (.) key to adjust the display for the current trace.
7. Record the min and max values in Table A-2, “Cable and Antenna Analyzer Return Loss Accuracy
Verification” on page A-2.
8. Remove the 6 dB offset and install the 20 dB offset.
9. Press the AutoScl (.) key to adjust the display for the current trace.
10. Record the min and max values in Table A-2.

S331L Performance Verification 2-4 Power Meter Verification
S331L MM PN: 10580-00323 Rev. B 2-3
2-4 Power Meter Verification
The following test can be used to verify the accuracy of the Power Meter.
Equipment required
•Power Meter: Anritsu Model ML2437A
•Power Sensor: Anritsu Model SC7400
•Synthensizer: Anritsu Model MG3692B
•Power Splitter: Aeroflex/Weinschel Model 1870A
•RF Coaxial Cable: Anritsu Model 15NN50-0.6B
Procedure
1. Connect the SC7400 power sensor to the ML2437A power meter and zero/cal the sensor.
2. Set the SC7400 cal factor to 100 MHz or the next frequency within Table A-3, “Power Meter Verification”
on page A-3.
3. Put S331L into Power Meter Mode, choose Calibration and turn Zero On.
4. Press the Frequency key and set the Measurement Frequency to 100 MHz or the next frequency within
Table A-3.
5. Connect the MG3692B, SC7400 and S331L to the power splitter as shown in Figure 2-1.
6. On the MG3692B, set the frequency to 100 MHz or the next frequency within Table A-3 and adjust the
power level so the ML2437A shows 0.0 dBm.
7. Record the S331L’s power reading in Table A-3.
Figure 2-1. Power Meter Measurement Accuracy
S331L Site Master
MG3692x Synthesized Signal Generator
ML2437A Power Meter
SC7400
Sensor
1870A
Power Splitter
Adapter
Enter
Menu
S331AL
Save
7
System
8
Preset
9
ScrnShot
4
Trace
5
Limit
6
File
1
Tou ch
2
Sweep
3
Help
0
AutoScl
.
Run/Hold
+/-
ESC
SiteMaster

2-4 Power Meter Verification S331L Performance Verification
2-4 PN: 10580-00323 Rev. B S331L MM
8. Adjust the MG3692B’s power level so the ML2437A reads -30 dBm.
9. Record the S331L’s power reading in Table A-3.
10. Repeat Step 2 through Step 9 for the other frequencies within Table A-3.

S331L Performance Verification 2-5 InstaCal Verification
S331L MM PN: 10580-00323 Rev. B 2-5
2-5 InstaCal Verification
The following test can be used to verify the accuracy of return loss measurements using the InstaCal module to
perform an OSL calibration on the S331L.
Equipment Required
•6 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5905
•20 dB Offset Termination Frequency: DC to 18.0 GHz Anritsu Model SC5906
Procedure
1. Verify that the S331L is in Cable and Antenna Analyzer mode and preset the unit.
2. Press the Measurement menu key, then press the Return Loss soft key.
3. Press the Calibration menu key.
4. Press the Start Calibration soft key. Follow the instructions on the screen using an InstaCal Cal Method and
the Standard Cal Type to perform a calibration.
5. After the calibration is complete, remove the cable from the InstaCal port and install the 6 dB offset
termination to the end of the cable.
6. Press the AutoScl (.) key to adjust the display for the current trace.
7. Record the min and max values in Table A-4, “Insta Cal Verification” on page A-4.
8. Remove the 6 dB offset and install the 20 dB offset.
9. Press the AutoScl (.) key to adjust the display for the current trace.
10. Record the min and max values in Table A-4.

2-5 InstaCal Verification S331L Performance Verification
2-6 PN: 10580-00323 Rev. B S331L MM

S331L MM PN: 10580-00323 Rev. B 3-1
Chapter 3 — Battery Information
3-1 General Information
The following information relates to the care and handling of the Anritsu PN ND74886 Lithium-Ion battery
pack. The S331L has two separate batteries that should be replaced as a pair. The ND74886 includes two
batteries. For information on removing and replacing the S331L batteries, see Section 4-1 “Replacing the
S331L Batteries” on page 4-1
•The batteries supplied with the S331L may need charging before use. Before using the Site Master,
charge the internal batteries using the AC-DC Adapter PN 40-187-R.
•Use only Anritsu approved battery packs.
•Recharge the battery only in the S331L, do not attempt to charge in an external charger.
•When the S331L is not in use, and the battery is fully charged, disconnect it from the power source.
•Do not charge batteries for longer than 24 hours; overcharging may shorten battery life.
•If left unused a fully charged battery will discharge itself over time.
•Temperature extremes affect the ability of the battery to charge: allow the battery to cool down or warm
up as necessary before use or charging.
•Discharge the battery from time to time to improve battery performance and battery life.
•The battery can be charged and discharged hundreds of times, but it will eventually wear out.
•The battery may need to be replaced when the operating time between charging becomes noticeably
shorter than normal.
•Never use a damaged or worn out battery.
•Storing the battery in extreme hot or cold places will reduce the capacity and lifetime of the battery.
•Never short-circuit the battery terminals.
•Do not drop, mutilate or attempt to disassemble the battery.
•Do not dispose of batteries in a fire!
•Batteries must be recycled or disposed of properly. Do not place batteries in household garbage.
•Always use the battery for its intended purpose only.

3-1 General Information Battery Information
3-2 PN: 10580-00323 Rev. B S331L MM

S331L MM PN: 10580-00323 Rev. B 4-1
Chapter 4 — Assembly Replacement
This section will provide a list of tools and procedures to replace the sub-assemblies within the S331L.
Tools Required:
•#1 Philips Screw Driver
•#6 Torx Screw Driver
•19mm wrench
4-1 Replacing the S331L Batteries
This procedure provides instructions for replacing the batteries in the S331L.
1. Remove the bottom bumper..
Caution
Electrostatic Discharge (ESD) can damage the highly sensitive circuits in the instrument.
Repair of damage that is found to be caused by electrostatic discharge is not covered under
warranty.
The S331L contains components that can be easily damaged by electrostatic discharge (ESD). An
ESD safe work area and proper ESD handling procedures that conform to ANSI/ESD S20.20-1999
or ANSI/ESD S20.20-2007 is mandatory to avoid ESD damage when handling subassemblies or
components found in the instrument.
Figure 4-1. Bottom Bumper Removal

4-1 Replacing the S331L Batteries Assembly Replacement
4-2 PN: 10580-00323 Rev. B S331L MM
2. Remove the six screws screws from the bottom of the unit holding the battery cover in place, and remove
the battery cover.
3. Remove the battery connectors from the Main board by gently pulling on them and then remove the
batteries from the unit..
4. Inserting batteries is the reverse of removing them.
Figure 4-2. Battery Cover Removed
Figure 4-3. Unplug the Battery Connectors and Remove the Batteries