Anritsu MS2028B Maintenance Manual

Maintenance Manual

VNA Master MS2026B and MS2028B Vector Network Analyzers

MS2026B Vector Network Analyzer 5 kHz to 6 GHz, N Connectors MS2028B Vector Network Analyzer 5 kHz to 20 GHz, N or K Connectors

Anritsu Company 490 Jarvis Drive Morgan Hill, CA 95037-2809 USA

Part Number: 10580-00222

Published: February 2010

Revision: A

WARRANTY

The Anritsu product(s) listed on the title page is (are) warranted against defects in materials and workmanship for one year from the date of shipment.

Anritsu’s obligation covers repairing or replacing products which prove to be defective during the warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for warranty repairs. Obligation is limited to the original purchaser. Anritsu is not liable for consequential damages.

LIMITATION OF WARRANTY

The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear. Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifications of the product. No other warranty is expressed or implied, and the remedies provided herein are the Buyer’s sole and exclusive remedies.

DISCLAIMER OF WARRANTY

DISCLAIMER OF WARRANTIES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, ANRITSU COMPANY AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH REGARD TO THE SOFTWARE PRODUCT. THE USER ASSUMES THE ENTIRE RISK OF USING THE PROGRAM. ANY LIABILITY OF PROVIDER OR MANUFACTURER WILL BE LIMITED EXCLUSIVELY TO PRODUCT REPLACEMENT.

NO LIABILITY FOR CONSEQUENTIAL DAMAGES. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL ANRITSU COMPANY OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE THE SOFTWARE PRODUCTS, EVEN IF ANRITSU COMPANY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

TRADEMARK ACKNOWLEDGMENTS

Windows, Windows XP, Microsoft Paint, Microsoft Word, Microsoft Access, Microsoft Excel, Microsoft PowerPoint, and Visual Studio are all registered trademarks of Microsoft Corporation. Acrobat Reader is a registered trademark of Adobe Corporation. NI is a trademark of the National Instruments Corporation. VNA 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 web site at:

http://www.us.anritsu.com

For the latest service and sales contact information in your area, please visit:

http://www.anritsu.com/contact.asp

Notes On Export Management

This product and its manuals may require an Export License or approval by the government of the product country of origin for re-export from your country.

Before you export this product or any of its manuals, please contact Anritsu Company to confirm whether or not these items are export-controlled.

When disposing of export-controlled items, the products and manuals need to be broken or shredded to such a degree that they cannot be unlawfully used for military purposes.

CE Conformity Marking

Anritsu affixes the CE Conformity marking onto its conforming products in accordance with Council Directives of The Council Of The European Communities in order to indicate that these products conform to the EMC and LVD directive of the European Union (EU).

C-tick Conformity Marking

Anritsu affixes the C-tick marking onto its conforming products in accordance with the electromagnetic compliance regulations of Australia and New Zealand in order to indicate that these products conform to the EMC regulations of Australia and New Zealand.

Mercury Notification

This product uses an LCD backlight lamp that contains mercury. Disposal may be regulated due to environmental considerations. Please contact your local authorities or, within the United States, the Electronics Industries Alliance (www.eiae.org) for disposal or recycling information.

European Parliament and Council Directive 2002/96/EC

Chinese RoHS Compliance Statement

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

Danger

This indicates a very dangerous procedure that could result in serious injury or death, and possible loss related to equipment malfunction, if not performed properly.

Warning

This indicates a hazardous procedure that could result in light-to-severe injury or loss related to equipment malfunction, if proper precautions are not taken.

Caution

This indicates a hazardous procedure that could result in loss related to equipment malfunction if proper precautions are not taken.

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.

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.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A Safety-1

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.

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.

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 hig h-voltage p arts 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.

Electrostatic Discharge (ESD) can damage the highly sensitive circuits in the instrument. ESD is most likely to occur as test devices are being

Caution

Safety-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

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 instrume nt’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.

Chapter 1 — General Information

1-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Key Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Frequency Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Standard Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-3 Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-4 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-5 Recommended Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1-6 Recommended Tools and Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1-7 Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2 — Performance Verification

2-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2 Frequency Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-3 Transmission Dynamic Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-4 S-Parameter Measurements Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Special Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

If Verification Fails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2-5 Power Monitor (Option 5) Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-6 Bias Tee (Option 10) Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Voltage and Current Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Fault Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2-7 GPS (Option 31) Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Chapter 3 — Battery Information and Replacement

3-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3-2 Replaceable Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A Contents-1

Table of Contents (Continued)

3-3 Battery Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Approved Batteries Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Recharging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Analyzer Not In Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Physical Handling of Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Battery Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-4 Battery Pack Removal and Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Chapter 4 — Assembly Removal and Replacement

4-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 Electrostatic Discharge Prevention. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-3 Real Time Clock (RTC) Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-4 Replaceable Parts, Assemblies, and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-5 Front Panel Components for VNA Master MS202XB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-6 Main Keypad Bezel for VNA Master MS202XB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-7 Softkey Keypad Bezel for VNA Master MS202XB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-8 Internal Anatomy of the VNA Master MS2026B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

MS2026B View from Top Connector Strip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

MS2026B View from Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-9 Internal Anatomy of the VNA Master MS2028B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

MS2028B View from Top Connector Strip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

MS2028B View from Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-10 Disassembly Sequence Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

4-11 Open the Instrument Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

4-12 Replace Power Monitor PCB Assembly Option 5 – ND67 197 . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Part Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363. . . . . . . . . . . . . . . . . . . . . 4-17

Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

4-14 Replace GPS Receiver Module Option 31 – ND70320 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

4-15 Replace Rotary Encoder – 3-410-101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27

4-16 Remove Main PCB Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

4-17 Replace Main PCB Assembly – ND69864, ND69865. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34

Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34

Contents-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Table of Contents (Continued)

4-18 Replace LCD Backlight Inverter PCB Assembly – 3-61362 . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

4-19 Replace LCD Display PCB Assembly – 3-15-118 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39

4-20 Replace Clear Plastic LCD Protector – 3-61368 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

4-21 Install Main PCB and Reassemble Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41

4-22 Replace Main Keypad Components – 3-61362, 65027-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45

4-23 Replace Soft Key Keypad Membrane – 3-61361. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48

4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3. . . . . . . . . . . . . . . . . . . . . . . . . 4-50

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50

4-25 Replace Hand Strap Handle – 3-61470 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54

4-26 Replace Rotary Knob – 3-61360-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55

Chapter 5 — Troubleshooting

5-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2 Turn-on Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Unit Cannot Boot Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Unit Cannot Complete Boot-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Unit Boots with No Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Boot-up Self Test Fails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-3 Operating Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

IF Out of Range Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Lock Error Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Option 5, Power Monitor Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Appendix A — Test Records

A-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A Contents-3

Table of Contents (Continued)

A-2 MS2026B VNA Master Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Instrument Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

VNA Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

S-Parameter Measurements Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Transmission Dynamic Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Power Measurement (For instruments with Option 5 Power Monitor). . . . . . . . . . . . . . . . . A-3

A-3 MS2028B VNA Master Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Instrument Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

VNA Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

S-Parameter Measurements Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Transmission Dynamic Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Power Measurement - Instruments with Option 5 Power Monitor . . . . . . . . . . . . . . . . . . . . A-5

Appendix B — Test Fixture Schematics

B-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

B-2 T2904 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

B-3 T3377 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

B-4 T3536 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Index

Contents-4 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

List of Figures and Tables

Chapter 1 — General Information

Table 1-1. Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Table 1-2. Replaceable Parts and Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2 — Performance Verification

Figure 2-1. Calibration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Table 2-1. Transmission Dynamic Range Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-2. Power Monitor Verification Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Table 2-2. Power Monitor Verification Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Table 2-3. Bias Tee Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Chapter 3 — Battery Information and Replacement

Table 3-1. Replaceable Battery Parts and Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Figure 3-1. Battery Access Door Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-2. Battery Access Door Notch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-3. Removing the Battery Access Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-4. Removing the Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-5. MS202XB Case, Battery Door, and Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-6. Orientation of Battery Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Chapter 4 — Assembly Removal and Replacement

Table 4-1. Replaceable Parts and Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Figure 4-1. Case Front Components Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figure 4-2. Main Keypad Bezel and Locking Tabs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 4-3. Softkey Keypad Bezel and Locking Tab Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Figure 4-4. VNA Master MS2026B Major Assemblies – Viewed from Top Connector Strip. . . . . . . . 4-7

Figure 4-5. VNA Master MS2026B Major Assemblies – Viewed from Bottom . . . . . . . . . . . . . . . . . . 4-8

Figure 4-6. VNA Master MS2028B Major Assemblies – Viewed from Top Connector Strip. . . . . . . . 4-9

Figure 4-7. VNA Master MS2028B Major Assemblies – Viewed from Bottom . . . . . . . . . . . . . . . . . 4-10

Figure 4-8. Opening the Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Figure 4-9. Power Monitor PCB Assembly - Option 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Figure 4-10. VNA Module Assembly Screw Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Figure 4-11. VNA Module and Main PCB Assembly Coaxial Cable Connections . . . . . . . . . . . . . . 4-20

Figure 4-12. “Folded” VNA Module (on left) and Main PCB and Case Front (on right) . . . . . . . . . . 4-21

Figure 4-13. Locking Tab Locations for Soft Key Keypad Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

Figure 4-14. Main Keypad Bezel Locking Tab Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31

Figure 4-15. LCD Backlight Power Inverter PCB Assembly Screws and Cables . . . . . . . . . . . . . . . 4-35

Figure 4-16. LCD Cable, Mounting Screws, and Backlight Cable . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36

Figure 4-17. LCD Backlight Cables and Mounting Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

Figure 4-18. Main Keypad Bezel Locking Tab Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45

Figure 4-19. Locking Tab Locations for Soft Key Keypad Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48

Figure 4-20. Locking Tab Locations for Main Keypad Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-51

Figure 4-21. Locking Tab Locations for Soft Key Keypad Bezel. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52

Chapter 5 — Troubleshooting Appendix A — Test Records

Table A-1. Spectrum Analyzer (SA) - Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table A-2. Transmis sio n Dyn am ic Ra ng e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table A-3. Power Measurement for Instruments with Power Monitor Option 5 . . . . . . . . . . . . . . . . . A-3

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A Contents-5

List of Figures and Tables (Continued)

Table A-4. Spectrum Analyzer (SA) - Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-5. Transmission Dynamic Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-6. Power Measurements for Instruments with Power Monitor Option 5 . . . . . . . . . . . . . . . . A-5

Appendix B — Test Fixture Schematics

Figure B-1. T2904 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Figure B-2. T3377 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2

Figure B-3. T3536 Test Fixture Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

Contents-6 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Chapter 1 — General Information

1-1 Introduction

This manual provides maintenance instructions for the VNA Master MS202XB. It describes the product and provides performance verification procedures, parts replacement procedures, and a replaceable parts list.

1-2 Description

The MS202XB VNA Master is a broadband Vector Network Analyzers which offer the industry’s first 12-term error correction in a truly handheld, battery-operated, rugged multi-function instrument.

Key Features

• Two-port vector network analysis to 20 GHz

• Support for coaxial and waveguide connector types

• True 2-Port, 12-term error correction calibrations

• Fully reversing test port configuration

Frequency Ranges

• MS2026B 5 kHz to 6 GHz, N Connectors

• MS2028B 5 kHz to 20 GHz, N or K Connectors

Standard Accessories

• 10580-00220 MS202XB User Guide

• 65729 Soft Carrying Case

• 2300-498 Master Software Tools CD ROM

• 633-44 Rechargeable battery, Li-Ion

• 40-168-R AC – DC Adapter

• 806-141-R Automotive 12 Volt DC Adapter

• 3-2000-1498 USB A-mini B Cable, 3 meters (10 feet)

• 2000-1371-R Cat 5 Ethernet Cable

• 3-806-152 Cat 5 Ethernet Crossover Cable

• 2000-1520-R 2GB USB Memory Drive

1-3 Related Documents

Other documents are available for the MS2026B and MS2028B at the Anritsu web site at www.anritsu.com

• VNA Master MS2026B and MS2028B User Guide – PN 10580-00220

• VNA Master MS2026B and MS2028B Programming Manual – PN 10580-00221

1-4 Options

• Option 2 Time Domain Analysis

• Option 5 Power Monitor (requires external detector)

• Option 7 Secure Data Operation

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 1-1

1-5 Recommended Test Equipment General Information

• Option 10 Built-in Variable Bias-Tee (+12 to +32 V in 0.1 V steps)

• Option 11 K (f) Test Port Connectors (MS2028B Only)

• Option 15 Vector Voltmeter

• Option 19 High Accuracy Power Meter (requires external USB Sensor)

• Option 31 GPS Receiver (GPS antenna 2000-1528-R sold separately)

• Option 77 Balanced/Differential S-parameters, 1-Port

1-5 Recommended Test Equipment

The following test equipment is recommended for use in testing and maintaining the VNA Master.

Note Verify that the test equipment is operating properly before it is used.

Table 1-1. Recommended Test Equipment

Recommended

Equipment Critical Specification

Manufacturer/Model

Frequency Counter

Frequency Reference

Open/Short/Load

RF Coaxial Cable

Verification Kit

Open/Short/Load

(for Option 11)

Open/Short/Load

(for Option 11)

RF Coaxial Cable

(for Option 11)

Verification Kit

(for Option 11)

Frequency: 2 - 3 GHz Anritsu Model MF2412B Frequency: 10 MHz Symmetricom Model

RubiSource T&M

Frequency: DC to 18 GHz Connector: N(m)

Frequency: DC to 18 GHz Connector: N(f)

Frequency: DC to 18 GHz Impedance: 50 Ohm Connector: N(m) to N(m)

Connector: N Type Anritsu Model SC7858

Frequency: DC to 20 GHz Connector: K(m)

Frequency: DC to 20 GHz Connector: K (f)

Frequency: DC to 40 GHz Impedance: 50 Ohm Connector: K (f) to K(m)

Connector: K Type

Anritsu Model OSLN50

Anritsu Model OSLNF50

Anritsu Model 3670NN50-2

(Includes verification software)

Anritsu Model OSLK50

Anritsu Model OSLKF50

Anritsu Model 3670K50-2

Anritsu Model SC7859 (includes verification software)

Adapter

(for Option 11)

Adapter

(for Option 11)

Synthesized Signal Generator

(for Option 5)

RF Detector

(for Option 5)

1-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Frequency: DC to 40 GHz Connector: K(m) to K(m)

Frequency: DC to 18 GHz Connector: N(f) to K(m)

Frequency: 1 GHz Power Level: -40 to +13 dBm

Frequency: 10 MHz to 20 GHz Anritsu Model 560-7N50B

Anritsu Model 33KK50B

Anritsu Model 34NFK50

Anritsu Model MG3691B with Options 2A and 4 (or 5)

General Information 1-6 Recommended Tools and Supplies

Table 1-1. Recommended Test Equipment

Recommended

Equipment Critical Specification

Manufacturer/Model

Adapter

(for Option 5)

Power Meter

(for Option 5)

Power Sensor

(for Option 5)

Power Splitter

(for Option 5)

Load Test Fixture

(for Option 10)

Load Test Fixture

(for Option 10)

Load Test Fixture

(for Option 10)

Torque Wrench

(for Option 11)

Personal Computer

Frequency: DC to 40 GHz Connector: K(m) to N(f)

Power Range: –70 to +20 dBm

Frequency: 10 MHz to 18 GHz, Range: –67 to +20 dB

Frequency: DC to 18 GHz Areoflex/Weinschel Model 1870A Resistance: 40 Ohm

Power: 5 Watts Resistance: 105 Ohm

Power: 1 Watt Resistance: 78 Ohm

Power: 20 Watts 3/4” (0.75”) Open End Wrench

12 in-lbs (1.35 Nm) 5/16” (0.325“) Open End Wrench

8 in-lbs (0.90 Nm) Operating System: Windows XP

Interface: Ethernet, RJ-48 Software: National Instruments VISA version 4.4.1

Anritsu Model 3RKNF50

Anritsu Dual Channel Model ML2437A

Anritsu Model MA2442D

Anritsu Model T2904

Anritsu Model T3377

Anritsu Model T3536

Anritsu Model 01-200

Anritsu Model 01-201

Any

1-6 Recommended Tools and Supplies

• Castellated Socket with 1/4” hex drive – For Castellated (Slotted) BNC Connector Dress Nuts

• Anritsu Part Number – T1451

• Hex driver handle – For tool above

• Medium Phillips Head Screwdriver

• Small Flat Blade Screwdriver, with tip width of less than 3.5 mm – For Front Panel Keypad Bezels

• Small square of rubber or similar non-scratch material approximately 25 mm x 25 mm (1” x 1”) – For

Front Panel Keypad Bezels

• 5.5 mm Angled-Head Open End Wrench

• 5/16” (~8 mm) Open End Wrench, 2 each recommended – For SMA Connectors

• 5/16” and 8 in-lbs Open End Torque Wrench, Anritsu Model 01-201– For Option 11

• 7/16” (~12 mm) Nut Driver – For Rotary Encoder

• 3/4” and 12 in-lbs Open End Torque Wrench, Anritsu Model 01-200

• Needle-Nose Pliers

• Small Cable Ties

• Scraper Tool – For removing RTV from connectors

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 1-3

1-6 Recommended Tools and Supplies General Information

• Room Temperature Vulcanizing (RTV) Silicon Sealant – For Keypad Flex PCB Replacement

• Anritsu Part Number – 3-783-1102

• Approved cleaning supplies – For LCD Display, Clear Plastic LCD Protector, and instrument Case

1-4 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

General Information 1-7 Replaceable Parts and Assemblies

1-7 Replaceable Parts and Assemblies

To ensure that the correct options are provided on the replacement assembly when ordering either a VNA Module Assembly or Main PCB Assembly, all installed instrument options must be declared on the order.

The installed options are listed on a label on the top of the MS202XB and can also be viewed in the System/Status display.

The table below summarizes the available replaceable parts and assemblies with links to

Chapter 4, “Assembly Removal and Replacement” detailed procedures

Table 1-2. Replaceable Parts and Assemblies (1 of 2)

Part Number Description

Main PCB Assembly for MS2026B instruments

ND69864

ND69865

ND69866

ND69867

ND70363

ND67197

ND70320

3-15-118

3-61368

3-66549-3

3-61362

– VNA Module not included – LCD Display not included – Section 4-14 “Replace Main PCB Assembly – ND69864, ND69865” on page 4-28

Main PCB Assembly for MS2028B instruments – VNA Module not included – LCD Display not included – Section 4-14 “Replace Main PCB Assembly – ND69864, ND69865” on page 4-28

VNA Module Assembly with N(f) connectors for MS2026B instruments – For MS2026B instruments equipped with standard N (f) Test Ports – Section 4-10 “Replace VNA Module Assembly – ND69866, ND69867, ND70363” on page 4-13

VNA Module Assembly with N(f) connectors for MS2028B – For MS2028B instruments equipped with standard N (f) Test Ports – Section 4-10 “Replace VNA Module Assembly – ND69866, ND69867, ND70363” on page 4-13

VNA Module Assembly with K (f) connectors for MS2028B – For MS2028B instruments equipped with Option 11 K (f) Test Ports – Section 4-10 “Replace VNA Module Assembly – ND69866, ND69867, ND70363” on page 4-13

Power Monitor PCB Assembly, Option 5 – For MS2026B instruments equipped with Option 5 Power Monitor – For MS2028B instruments equipped with Option 5 Power Monitor – Section 4-9 “Replace Power Monitor PCB Assembly Option 5 – ND67197” on page 4-11

GPS Receiver Module, Option 31 – For MS2026B instruments equipped with Option 31 GPS Receiver – For MS2028B instruments equipped with Option 31 GPS Receiver – Does not include GPS Antenna 2000-1528-R – Section 4-11 “Replace GPS Receiver Module Option 31 – ND70320” on page 4-17

LCD Display – For either MS2026B or MS2028B instruments – Section 4-16 “Replace LCD Display PCB Assembly – 3-15-118” on page 4-33

Clear Plastic LCD Protector – For either MS2026B or MS2028B instruments – Section 4-17 “Replace Clear Plastic LCD Protector – 3-61368” on page 4-34

LCD Backlight Power Inverter PCB – For either MS2026B or MS2028B instruments – Section 4-15 “Replace LCD Backlight Inverter PCB Assembly – 3-61362” on page 4-32

Main Keypad Membrane – For either MS2026B or MS2028B instruments – Section 4-19 “Replace Main Keypad Components – 3-61362, 65027-3” on page 4-38

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 1-5

1-7 Replaceable Parts and Assemblies General Information

Table 1-2. Replaceable Parts and Assemblies (2 of 2)

Part Number Description

Main Keypad PCB

65027-3

– For either MS2026B or MS2028B instrumen ts – Section 4-19 “Replace Main Keypad Components – 3-61362, 65027-3” on page 4-38

Soft Key Keypad Membrane

3-61361

– For either MS2026B or MS2028B instrumen ts – Section 4-20 “Replace Soft Key Keypad Membrane – 3-61361” on page 4-42

Soft Key Keypad Flex PCB

61333-3

– For either MS2026B or MS2028B instrumen ts – Section 4-21 “Replace Soft Key Keypad Components – 3-61361, 61333 -3” on page 4-44

Rotary Encoder

3-410-101

– For either MS2026B or MS2028B instrumen ts – Does not include the Rotary Knob 3-61360-2 – Section 4-12 “Replace Rotary Encoder – 3-410-101” on page 4-20

Encoder Rotary Knob (excluding encoder)

3-61360-2

– For either MS2026B or MS2028B instrumen ts – Does not include the Rotary Encoder 3-410-101 – Section 4-12 “Replace Rotary Encoder – 3-410-101” on page 4-20

Hand Strap

3-61470

– For either MS2026B or MS2028B instrumen ts – Section 4-22 “Replace Hand Strap Handle – 3-61470” on page 4-48

Battery Door

61379-2

– For either MS2026B or MS2028B instrumen ts – See Chapter 3, “Battery Information and Replacement” for replacement of the battery door.

Rechargeable Battery, Lithium-Ion

633-44

– For either MS2026B or MS2028B instrumen ts – See Chapter 3, “Battery Information and Replacement” for replacement of the rechargeable battery.

40-168-R

65729

806-141

3-2000-1498

2000-1371-R

3-806-152

AC to DC Power Adapter – For either MS2026B or MS2028B instrumen ts

Soft Carrying Case – For either MS2026B or MS2028B instrumen ts

Automotive 12 Volt DC Adapter – For either MS2026B or MS2028B instrumen ts

USB Type 2 A to Mini B Cable, 3 meters (10 feet) – For either MS2026B or MS2028B instrumen ts

Category 5 (Cat5) Ethernet Cable – For either MS2026B or MS2028B instrumen ts

Category 5 (Cat5) Crossover Cable – For either MS2026B or MS2028B instrumen ts

1-6 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Chapter 2 — Performance Verification

2-1 Introduction

This chapter contains tests that can be used to verify the performance or operation of the VNA Master MS2026B and MS2028B.

2-2 Frequency Accuracy

The following test can be used to verify the CW frequency accuracy of the VNA Master. Measurement calibration of the VNA is not required for this test.

Equipment Required

• Frequency Counter, Anritsu Model MF2412B

• RF Coaxial Cable, Anritsu Model 3670K50-2 or 3670NN50-2

• Adapter, Anritsu Model 33KK50B or 34NFK50

Procedure

1. Press the On/Off key to turn on the VNA Master.

2. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default

starting conditions.

Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.

3. Press the Measure soft key and then the S-Parameter soft key. Select S21.

4. Press the # of Traces soft key and then select 1. Press the Back soft key.

5. Press the Graph Type soft key. Then select Log Mag and press Enter key to accept the selection.

6. Press the Sweep soft key and change the Data Point to 1000.

7. Press the Freq/Time/Dist soft key and then press the Start Freq soft key.

8. Enter 2.6 then press the GHz soft key to set the Start Frequency to 2.6 GHz.

9. Press the Stop Freq soft key.

10. Enter 2.6 and press the GHz soft key to set the Stop Frequency to 2.6 GHz.

11. Connect the RF cable from the VNA Master Port 1 to the RF Input1 connector on the Frequency Counter.

12. Turn on the Frequency Counter and press the Preset key.

13. Verify that Frequency Counter reading is 2.6 GHz, ± 3.9 kHz.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-1

2-3 Transmission Dynamic Range Performance Verification

2-3 Transmission Dynamic Range

The following test is used to verify the transmission dynamic range. Measurement calibration of the VNA Master is required for this test.

Equipment Required

• Calibration Tee, N male, Anritsu Model OSLN50

• Calibration Tee, N female, Anritsu Model OSLNF50

• RF Coaxial Cable, Anritsu Model 3670NN50-2

• Calibration Tee, K male, Anritsu Model OSLK50 (for units with Option 11)

• Calibration Tee, K female, Anritsu Model OSLKF50 (for units with Option 11)

• RF Coaxial Cable, Anritsu Model 3670K50-2 (for units with Option 11)

• Adapter, Anritsu Model 33KK50B (for units with Option 11)

Procedure

1. Press the On/Off key to turn on the VNA Master.

2. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default

starting conditions.

Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.

3. Press the Measure soft key and then the S-Parameter soft key. Select S21.

4. Press the # of Traces soft key and then select 1. Press the Back soft key.

5. Press the Graph Type soft key. Then select Log Mag and press Enter key to accept the selection.

6. Press the Sweep soft key. Change the Data Point to 986 and IFBW to 10 Hz.

7. Press the Freq/Time/Dist soft key and then press the Start Freq soft key.

8. Enter 5 then press the kHz soft key to set the Start Frequency to 5 kHz.

9. Press the Stop Freq soft key.

10. Enter 3 and press the GHz soft key to set the Stop Frequency to 3 GHz.

11. Connect the RF cable to the VNA Master Port 2. Refer to Figure 2-1 below for general hookup

configuration. For instruments with Option 11, install the 33KK50B Adapter to Port 2 and then the RF cable.

12. Press the Shift key and then the Calibrate (2) key. Ensure that Cal Type is Full 2-Port and

SOLT.

13. Press the DUT Port Setup soft key. Change Coax DUT Port 2 to N-Conn(F) or K-Conn(F). Press the Back

soft key.

Cal Method is

2-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Performance Verification 2-3 Transmission Dynamic Range

OPEN

SHORT

LOAD

OPEN

SHORT

LOAD

Port 1 Port 2

14. Press the Start Cal soft key and connect the appropriate standard of the calibration tees to Port 1 and the

open end of the RF cable (extended Port 2) as instructed at each Calibration step such as “Open Port 1”,

“Short Port 1”, “Short Port 2”, and so on. The figure below (Figure 2-1) shows the general calibration setup. See Table 2-1, “Transmission Dynamic Range Specification” on page 2-4 below at the end of this

section for a summary of the Transmission Dyn amic Range requirements by frequency range.

1. Test Port 1

2. Test Port 2

3. RF Test Cable

4. Open, Short, and Load Calibration Components

5. Open, Short, and Load Calibration Components

Figure 2-1. Calibration Setup

15. At the Calculate and Finish Cal step, disconnect the RF cable from Port 1. Use the up arrow key to select Isolation, Fwd & Rev (optional).

16. Connect the loads to both Port 1 and the open end of the RF cable (extended Por t 2 ) and then press the Enter key to measure isolation.

17. Now it goes back to Calculate and Finish Cal step again. Press the Enter key to finish the calibration.

18. Verify that the noise floor is below –80dB.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-3

2-3 Transmission Dynamic Range Performance Verification

19. Press the Measure soft key and then the S-Parameter soft key. Select S12.

20. Verify that the noise floor is below –80 dB.

21. Press the Freq/Time/Dist soft key and then press the Start Freq soft key.

22. Enter 3 then press the GHz soft key to set the Start Frequency to 3 GHz.

23. Press the Stop Freq soft key.

24. Enter 6 and press the GHz soft key to set the Stop Frequency to 6 GHz.

25. Repeat Step #12 to Step #17 above.

26. Verify that the noise floor is below –75 dB.

27. Press the Measure soft key and then the S-Parameter soft key. Select S21.

28. Verify that the noise floor is below –75 dB. The test is now complete for MS2026B.

Complete Test for MS2028B Only

29. Press the Freq/Time/Dist soft key and then press the Start Freq soft key.

30. Enter 6 then press the GHz soft key to set the Start Frequency to 6 GHz.

31. Press the Stop Freq soft key.

32. Enter 20 and press the GHz soft key to set the Stop Frequency to 20 GHz.

33. Repeat Step #12 to Step #17 above.

34. Verify that the noise floor is below –65 dB.

35. Press the Measure soft key and then the S-Parameter soft key. Select S12.

36. Verify that the noise floor is below –65 dB.

Table 2-1.

Transmission Dynamic Range Specification

Frequency Range Dynamic Range (dB)

5 kHz to 3 GHz 80

3 GHz to 6 GHz 75

6 GHz to 20 GHz 65

2-4 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Performance Verification 2-4 S-Parameter Measurements Verification

2-4 S-Parameter Measurements Verification

The following test verifies S-parameter measurement capabilities of the VNA Master, calibration tees, test port cable, and any required adapters as a system by analyzing the measurement of artifacts that are traceable to national standards laboratories. The procedures are automated by using the S-parameter Measurement Verification software, which is supplied with each SC7858 or SC7859 Verification Kit.

The S-parameter Measurement Verification software guides the user to perform a full 12 Term calibration on the VNA Master using the appropriate calibration tees, measure the S-parameters of the impedance transfer standards in the verification kit, and verify that the measured values are within the specified measurement uncertainty limits.

The impedance transfer standards contained in the verification kit are:

• 20 dB Attenuation Standard

• 50 dB Attenuation Standard

• 50 Ohm Air Line Standard

• 25 Ohm Mismatch (Beatty) Standard

The devices in the verification kit are selected based on their ability to stress the envelope of possible measurement parameters while still providing a very stable and repeatable behavior. The key attribute of the devices is that of long term stability.

The quality of the verification result is very dependent on the degree of care taken by the user in maintaining, calibrating, and using the system. The most critical factors are:

• The stability and quality of the devices in the calibration tee and the verification kit.

• The condition of the VNA test port connectors and test port cables.

• The pin depths of all connectors.

• The proper torquing of connections.

Note The use of non-Anritsu calibration tees or verification kits is not supported.

Equipment Required

• Calibration Tee, N male, Anritsu Model OSLN50

• Calibration Tee, N female, Anritsu Model OSLNF50

• RF Coaxial Cable, Anritsu Model 3670NN50-2

• N Connector Verification Kit, Anritsu Model SC7858

• 3/4” and 12 in-lb. Open End Torque Wrench, Anritsu 01-200

• Calibration Tee, K male, Anritsu Model OSLK50 (for units with Option 11)

• Calibration Tee, K female, Anritsu Model OSLKF50 (for units with Option 11)

• RF Coaxial Cable, Anritsu Model 3670K50-2 (for units with Option 11)

• Adapter, Anritsu Model 33KK50B (for units with Option 11)

• K Connector Verification Kit, Anritsu Model SC7859 (for units with Option 11)

• 5/16” and 8 in-lb. Open End Torque Wrench, Anritsu 01-201

• Personal Computer with Microsoft Windows XP Operating System, USB port, Ethernet interface, and

National Instruments VISA software version 4.4.1

Special Precautions

When performing the procedures, observe the following precautions:

• Minimize vibration and movement of the system, attached components, and test cable.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-5

2-4 S-Parameter Measurements Verification Performance Verificat ion

• Clean and check the pin depth and condition of all adapters, test port cables, calibration components, and impedance transfer standards.

• Pre-shape the test cable so as to minimize its movement during calibration and measurement activities.

Procedure

1. Use a Cat5-E Ethernet cable to connect the VNA Master to a Local Area Network port close to the PC controller. Alternatively, use a Cat5-E Ethernet Crossover cable to connect the VNA Master directly to

the PC Controller’s Ethernet port. Refer to the MS202XB User Guide, PN 10580-00220 for set up

procedures.

2. Power on the PC controller and the VNA Master.

3. Install the RF Coaxial Cable to Port 2 of the VNA Master. Install the 33KK50B Adapter to the open end

of the cable if verifying the instrument with Option 11.

4. Run the MS202XB S-parameter Measurement Verification software on the PC.

5. Verify that the PC controller is communicating with the VNA Master.

6. Insert the USB flash drive supplied with the verification kit to an available USB port on the PC

controller. Set the data location of the verification software to the USB flash drive when prompt.

7. Follow the directions displayed on the computer to perform calibration with the appropriate calibration kit.

Note

8. Follow the directions on the computer to perform measurements of impedance transfer standards of the appropriate verification kit.

Note

9. Pass/Fail status of the measurements is displayed on the computer. The software can also provide a hard copy printout of the measured data, measurement uncertainties, and the impedance transfer standards used.

Use an appropriate torque wrench to insure proper connection of calibration devices during calibration.

Use an appropriate torque wrench to insure proper connection of verification standard devices prior to starting verification measurements.

If Verification Fails

If the verification fails, check the quality, cleanliness, and installation methods for the calibration and verification components. Specifically, check:

• The VNA test port connectors

• The calibration tee

• The impedance transfer standards

• The test port cables for damage and cleanliness

• The test port cables for proper connection and torquing

• The test port cables for phase stability

These are the most common causes for verification failures.

2-6 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Performance Verification 2-5 Power Monitor (Option 5) Verification

2-5 Power Monitor (Option 5) Verification

If the Power Monitor (Option 5) is installed in the VNA Master, the following test can be used to verify the accuracy of the power measurements.

Equipment Required

• Anritsu MG3691B Synthesized Signal Source with options 2A and 4 (or 5)

• Power Meter, Anritsu Model ML2437A

• Power Sensor, Anritsu Model MA2442D

• RF Detector, Anritsu 560-7N50B

• Power Splitter, Aeroflex/Weinschel Model 1870A

• RF Coaxial Cable, Anritsu Model 3670NN50-2

• Adapter, Anritsu Model 34RKNF50

Procedure

1. Press the On/Off key to turn on the VNA Master.

2. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default

starting conditions.

3. Press the Shift key and then the Mode (9) key. Select Power Monitor and press the Enter key.

Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.

4. Set the MG3691B output to 1.0 GHz.

5. Connect the Power Sensor to the Power Meter and calibrate the sensor.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-7

2-5 Power Monitor (Option 5) Verification Performance Verification

3 4

6. Connect MG3691B, Power Meter, RF Detector, and Sensor as shown below in Figure 2-2.

1. Anritsu MS2026/28B VNA Master

2. Cable

3. Anritsu RF Detector, PN 560-7N50B

4. Power Splitter, Aeroflex/Weinschel Model 1870A

5. Cable

6. Anritsu Adapter, PN 34RKNF50

7. Anritsu MS3691B Synthesized Signal Source with Options A2 and 4 (or 5)

8. Anritsu Power Sensor, PN MA2442D

9. Cable

10. Anritsu ML2437A Power Meter

Figure 2-2. Power Monitor Verification Test Setup

7. On the MG3691B press the Level key, then use the knob to adjust the power level so that the power

meter reads –40 dBm.

8. Verify that the VNA Master reading is 40 ± 1.0 dBm.

2-8 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Performance Verification 2-5 Power Monitor (Option 5) Verification

9. Repeat Step #7 and Step #8 for the other power level settings shown in Table 2-2 below.

Table 2-2. Power Monitor Verification Specifications

Power Level (dB) Specification (dB)

–40 –21

–4

+13

± 1.0

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-9

2-6 Bias Tee (Option 10) Operational Check Performance Verification

2-6 Bias Tee (Option 10) Operational Check

If the Bias Tee (Option 10) is installed in the VNA Master, the following test can be used to verify the internal bias tee functionality.

Equipment Required

• 40 Ohm, 5 Watt, High Current Load, Anritsu T2904

• 78 Ohm, 1 Watt, Low Current Load, Anritsu T3536

• 105 Ohm, 1 Watt, Low Current Load, Anritsu T3377

• VNA Master External Power Supply, Anritsu Part Number 40-168-R

Procedure

1. Connect the external power supply (Anritsu part number 40-168-R) to the VNA Master. Note: The VNA Master must be powered by the external power supply for this test.

2. Press the On/Off key to turn on the VNA Master.

3. Press the Shift key, the Preset key (1), and then the Preset soft key to reset the instrument to the default

starting conditions.

4. Press the Freq/Time/Dist soft key and then press the Start Freq soft key.

5. Enter 10 then press the MHz soft key to set the Start Frequency to 10 MHz.

6. Press the Stop Freq soft key.

7. Enter 6 (for MS2026B) or 20 (for MS2028B) and press the GHz soft key to set the Stop Frequency to 6 or

20 GHz.

Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.

8. Press the Measure soft key and then the S-Parameter soft key. Select S21.

9. Press the # of Traces soft key and then select 1. Press the Back soft key.

10. Press the Maximize Active Trace soft key.

11. Press the Sweep soft key, the Configure Ports soft key and then the Bias Tee Setup soft key.

12. Press the Int Port Selection soft key to change to bias output to Port 1.

Voltage and Current Test

13. Connect the 105 Ohm load to Port 1.

14. Ensure that Int Voltage P1 setting is 12.0 V.

15. Press the Bias Tee soft key and then the Internal soft key to turn the Bias Tee On.

16. Verify the voltage and current readings displayed on the left upper corner of the screen are within the

ranges shown in Table 2-3.

17. Press the Bias Tee soft key and then the Off soft key to turn the Bias Tee Off.

18. Press the Int Voltage P1 soft key. Change the voltage to 18.0 V.

19. Repeat Step #15 through Step #17.

20. Remove the 105 Ohm Load from Port 1 and connect the 78 Ohm Load to Port 1.

21. Press the Int Voltage P1 soft key. Change the voltage to 32.0 V.

2-10 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Performance Verification 2-6 Bias Tee (Option 10) Operational Check

22. Repeat Step #15 through Step #17.

Table 2-3. Bias Tee Verification

Voltage Setting (V) 12.0 18.0 32.0

Expected Voltage (V) 10-12 15.7-17.7 28.5-30.9

Expected Current (mA) 85-145 142-202 361-411

Fault Test

23. Remove the 78 Ohm Load from Port 1 and connect the 40 Ohm Load to Port 1.

24. Change Int Voltage P1 to 15.0 V.

25. Press the Bias Tee soft key and then the Internal soft key to turn the Bias Tee On.

26. Verify that the instrument makes a clicking sound and the Bias Tee current reading displayed on the left

side of the screen is 0 mA.

27. Press the Bias Tee soft key and then the Off soft key to turn the Bias Tee Off.

28. Repeat Step #8 through Step #27 for Port 2.

Note

Helpful Tip: Set S Parameter to S12, set Int Port Selection to 2, change Int Voltage P2 and connect load to Port 2 as appropriate.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 2-11

2-7 GPS (Option 31) Operational Check Performance Verification

2-7 GPS (Option 31) Operational Check

The following test is used to verify the operation of the GPS option.

Note

Ensure that the Anritsu GPS Antenna is in a direct line-of-sight relationship to the GPS satellites or the Antenna is placed outside without any obstructions.

Equipment Required

• Anritsu 2000-1528-R GPS Antenna

Procedure

1. Press the On/Off key to turn on the VNA Master.

2. Press the Shift key, the Preset key (1), and then the Preset soft key to reset the instrument to the default

starting conditions.

Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.

3. Connect the GPS Antenna to the GPS Antenna connector on the VNA Master.

4. Press the Shift key, and then press the System (8) key.

5. Press the GPS soft key, then press the GPS On/Off soft key to turn the GPS On.

6. When the GPS fix is acquired, the GPS indicator at the top of the screen will turn green.

7. Press the GPS Info soft key to view the latitude, longitude, altitude, and other GPS information.

2-12 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Chapter 3 — Battery Information and Replacement

3-1 Introduction

This chapter describes the removal and replacement procedures for the instrument battery.

3-2 Replaceable Parts and Assemblies

The following replaceable parts are related to the battery pack and power adapters. To ensure that the correct parts are provided, be sure to list the model number, the instrument serial number, and the installed options with the order. The installed options are listed on a label on the top of the MS202XB and can also be viewed in

the System/Status display.

Table 3-1. Replaceable Battery Parts and Assemblies

Part Number Description

61379-2 Battery Door

40-168-R AC to DC Power Adapter

633-44 Rechargeable Battery, Li-Ion

806-141 Automotive 12 Volt DC Adapter

3-3 Battery Information

The following general information relates to the care and handling of the VNA Master MS202XB Anritsu 633-44 Rechargeable Lithium-Ion Battery.

Approved Batteries Only

• Always use the battery for its intended purpose only.

• Use only Anritsu-approved battery packs. Some non-approved battery packs may fit into the VNA

Master but are electrically incompatible and will not charge correctly.

• 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 charger or battery.

Recharging

• The battery pack supplied with the MS202XB VNA Master may need charging before use.

• Before using the VNA Master, the internal battery may be charged either in the VNA Master, using the

40-168R AC-DC Adapter, or in an automobile using the 806-141-R Automotive 12 Volt DC Adapter.

• The battery can also be charged separately in the optional 2000-1374 Dual Battery Charger.

• Recharge the battery only in the VNA Master or in an Anritsu-approved charger.

• Do not charge batteries for longer than 24 hours; overcharging may shorten battery life.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 3-1

3-3 Battery Information Battery Information and Replacement

Analyzer Not In Use

• When the VNA Master or the charger is not in use, disconnect it from the power source.

• 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.

• Storing the battery in extreme hot or cold places will reduce the capacity and lifetime of the battery.

Physical Handling of Batteries

• Never short-circuit the battery terminals.

• Do not drop, mutilate or attempt to disassemble the battery.

Battery Disposal

• The battery can be charged and discharged hundreds of times, but it will eventually wear out

• Do not dispose of batteries in a fire!

• Batteries must be recycled or disposed of properly. Do not place batteries in household garbage.

3-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Battery Information and Replacement 3-4 Battery Pack Removal and Replacement

3-4 Battery Pack Removal and Replacement

This section provides instructions for the removal and replacing the VNA Master battery pack.

Many of the procedures in this section are generic, and apply to many similar instruments. Photos

Note

1. With the VNA Master laying flat, face up, on a stable surface, locate the Battery Access Door , as shown

in Figure 3-1, “Battery Access Door Location”.

and illustrations used are representative and may show instruments other than the MS202XB VNA Master.

1. MS2026B/MS2028B VNA Master

2. Battery Access Door Location located at unit bottom.

Figure 3-1. Battery Access Door Location

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 3-3

3-4 Battery Pack Removal and Replacement Battery Information and Replacement

Pull Battery Access

Door

Down

Remove

2. Place a finger in the battery access door notch and push the door down towards the bottom of the

instrument, as shown in Figure 3-2, “Battery Access Door Notch”.

Battery

Door

Notch

Figure 3-2. Battery Access Door Notch

3. Remove the Battery Access Door, as shown in Figure 3-3, “Removing the Battery Access Door”.

Figure 3-3. Removing the Battery Access Door

3-4 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Battery Information and Replacement 3-4 Battery Pack Removal and Replacement

4. With the Battery Access Door completely removed, grasp the battery lanyard and pull the battery

straight out of the unit, as illustrated in Figure 3-4, “Removing the Battery”.

Remove Battery

Figure 3-4. Removing the Battery

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 3-5

3-4 Battery Pack Removal and Replacement Battery Information and Replacement

Figure 3-5. MS202XB Case, Battery Door, and Battery

3-6 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Battery Information and Replacement 3-4 Battery Pack Removal and Replacement

Battery Contacts

5. Replacement is the opposite of removal. Note the orientation of the battery contacts, and be sure to insert the new battery with the contacts facing the bottom of the unit, as shown in Figure 3-6, “Orientation of

Battery Contacts” below.

Figure 3-6. Orientation of Battery Contacts

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 3-7

3-4 Battery Pack Removal and Replacement Battery Information and Replacement

3-8 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Chapter 4 — Assembly Removal and Replacement

4-1 Introduction

This chapter describes the removal and replacement procedures for the various assemblies.

4-2 Electrostatic Discharge Prevention

All electronic devices, components, and instruments can be damaged by electrostatic discharge. It is important to take preventative measures to protect the instrument and its internal subassemblies from electrostatic discharge.

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 MS2026B/MS2028B VNA Master.

4-3 Real Time Clock (RTC) Battery

Note

The Real Time Clock (RTC) battery is not field replaceable and the instrument must be returned to the factory for service.

4-4 Replaceable Parts, Assemblies, and Accessories

To ensure that the correct options are provided on the replacement assembly when ordering a Main PCB Assembly, all options that are installed on your instrument must be declared on the order. The installed options are listed on a label on the top of the MS202XB and can also be viewed in the System/Status display.

Table 4-1. Replaceable Parts and Assemblies (1 of 3)

Part Number Description

Main PCB Assembly for MS2026B instruments

ND69864

ND69865

ND69866

ND69867

ND70363

– VNA Module not included – LCD Display not included – Section 4-17 – Replace Main PCB Assembly – ND69864, ND69865 on page 4-34

Main PCB Assembly for MS2028B instruments – VNA Module not included – LCD Display not included – Section 4-17 – Replace Main PCB Assembly – ND69864, ND69865 on page 4-34

VNA Module Assembly with N(f) connectors for MS2026B instruments – For MS2026B instruments equipped with standard N (f) Test Ports – Section 4-13 – Replace VNA Module Assembly – ND69866 ND69867 ND70363 on page 4-17

VNA Module Assembly with N(f) connectors for MS2028B – For MS2028B instruments equipped with standard N (f) Test Ports – Section 4-13 – Replace VNA Module Assembly – ND69866 ND69867 ND70363 on page 4-17

VNA Module Assembly with K (f) connectors for MS2028B – For MS2028B instruments equipped with Option 11 K (f) Test Ports – Section 4-13 – Replace VNA Module Assembly – ND69866 ND69867 ND70363 on page 4-17

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-1

4-4 Replaceable Parts, Assemblies, and Accessories Assembly Removal and Replacement

Table 4-1. Replaceable Parts and Assemblies (2 of 3)

Part Number Description

Power Monitor PCB Assembly, Option 5

ND67197

– For MS2026B instruments equipped with Option 5 Power Monitor – For MS2028B instruments equipped with Option 5 Power Monitor – Section 4-13 – Replace VNA Module Assembly – ND69866 ND69867 ND70363 on page 4-17

GPS Receiver Module, Option 31 – For MS2026B instruments equipped with Option 31 GPS Receiver

ND70320

– For MS2028B instruments equipped with Option 31 GPS Receiver – Does not include GPS Antenna 2000-1528-R – Section 4-14 – Replace GPS Receiver Module Option 31 – ND70320 on page 4-24

LCD Display

3-15-118

– VNA Module assembly not included – For either MS2026B or MS2028B instrumen ts – Section 4-19 – Replace LCD Display PCB Assembly – 3-15-118 on page 4-39

Clear Plastic LCD Protector

3-61368

– For either MS2026B or MS2028B instrumen ts – Section 4-20 – Replace Clear Plastic LCD Protector – 3-61368 on page 4-40

LCD Backlight Power Inverter PCB

3-66549-3

– For either MS2026B or MS2028B instrumen ts – Section 4-18 – Replace LCD Backlight Inverter PCB Assembly – 3-61362 on page 4-38

Main Keypad Membrane

3-61362

– For either MS2026B or MS2028B instrumen ts – Section 4-22 – Replace Main Keypad Components – 3-61362, 65027-3 on page 4-45

Main Keypad PCB

65027-3

– For either MS2026B or MS2028B instrumen ts – Section 4-22 – Replace Main Keypad Components – 3-61362, 65027-3 on page 4-45

Soft Key Keypad Membrane

3-61361

– For either MS2026B or MS2028B instrumen ts – Section 4-23 – Replace Soft Key Keypad Membrane – 3-61361 on page 4-48

Soft Key Keypad PCB

61333-3

– For either MS2026B or MS2028B instrumen ts – Section 4-24 – Replace Soft Key Keypad Components – 3-61361, 61333-3 on page 4-50

Rotary Encoder

3-410-101

– For either MS2026B or MS2028B instrumen ts – Does not include the Rotary Knob 3-61360-2 – Section 4-15 – Replace Rotary Encoder – 3-410-101 on page 4-27

Encoder Rotary Knob

3-61360-2

– For either MS2026B or MS2028B instrumen ts – Does not include the Rotary Encoder 3-410-101 – Section 4-26 – Replace Rotary Knob – 3-61360-2 on page 4-55

Hand Strap

3-61470

– For either MS2026B or MS2028B instrumen ts – Section 4-25 – Replace Hand Strap Handle – 3-61470 on page 4-54

Battery Door

61379-2

– For either MS2026B or MS2028B instrumen ts – See Chapter 3 for replacement of the battery door.

Rechargeable Battery, Lithium-Ion

633-44

– For either MS2026B or MS2028B instrumen ts – See Chapter 3 for replacement of the rechargeable battery.

4-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-4 Replaceable Parts, Assemblies, and Accessories

Table 4-1. Replaceable Parts and Assemblies (3 of 3)

Part Number Description

AC to DC Power Adapter

40-168-R

– For either MS2026B or MS2028B instruments – No disassembly required

Soft Carrying Case

65729

– For either MS2026B or MS2028B instruments – No disassembly required

Automotive 12 Volt DC Adapter

806-141

– For either MS2026B or MS2028B instruments – No disassembly required

USB Type 2 A to Mini B Cable, 3 meters (10 feet)

3-2000-1498

– For either MS2026B or MS2028B instruments – No disassembly required

Category 5 (Cat5) Ethernet Cable

2000-1371-R

– For either MS2026B or MS2028B instruments – No disassembly required

Category 5 (Cat5) Crossover Cable

3-806-152

– For either MS2026B or MS2028B instruments – No disassembly required

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-3

4-5 Front Panel Components for VNA Master MS202XB Assembly Removal and Replacement

4-5 Front Panel Components for VNA Master MS202XB

The figure below shows the major front panel components including the bezels, keypad membranes, PCBs, and other inner case components.

1. Main Keypad Switch Bezel

2. Main Keypad Switch Membrane

3. Main Keypad Switch PCB with installed speaker

4. Soft Key Switch Bezel

5. Soft Key Switch Membrane

6. Soft Key Switch Flex PCB connected to Main Keypad Switch PCB

7. Case Front

8. Rotary Knob

9. Rotary Encoder with attached cable harn ess

10. LCD Clear Plastic Protector

11. Handle Carrying Strap

12. Battery Connector Contacts with attached cable harness

13. Cooling Fan with mounting bracket and attached cable harness.

Figure 4-1. Case Front Components Overview

4-4 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-6 Main Keypad Bezel for VNA Master MS202XB

4-6 Main Keypad Bezel for VNA Master MS202XB

The figure below shows the Main Keypad Bezel, the location of its locking tabs, and its relationship to the Main Keypad Membrane.

1. Main Keypad Bezel Front View

2. Top View

3. Side View

4. Left side locking tab locations

5. Right side locking tab locations

6. Three-Quarter View

7. Underlying Main Keypad Membrane

Figure 4-2. Main Keypad Bezel and Locking Tabs

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-5

4-7 Softkey Keypad Bezel for VNA Master MS202XB Assembly Removal and Replacement

4-7 Softkey Keypad Bezel for VNA Master MS202XB

The figure below shows the Softkey Keypad Bezel, the location of its locking tabs, and its orientation to the case.

1. Softkey Keypad Bezel Front View

2. Top View

3. Side View

4. Three-Quarter View

5. Locking tab location for the left end of the bezel which goes toward the left side of the case

6. Locking tab location for bezel center

7. Locking tab location for the right end of the bezel which goes toward the right side (handle side) of the case

Figure 4-3. Softkey Keypad Bezel and Locking Tab Locations

4-6 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-8 Internal Anatomy of the VNA Master MS2026B

4-8 Internal Anatomy of the VNA Master MS2026B

MS2026B View from Top Connector Strip

1. Case Back

2. VNA Module Assembly with N (f) Connectors

3. Power Monitor Option 5 PCB Assembly (behind connector strip)

4. Main PCB Assembly

5. LCD Backlight Power Inverter PCB (mounted on Main PCB Assembly)

6. GPS Module Option 31 PCB Assembly

7. LCD Display (mounted on Main PCB Assembly)

8. Hand Strap (mounted on Case Front)

9. Rotary Knob and Rotary Encoder (mounted on Case Front)

10. Main Keypad (mounted on Case Front)

11. Soft Key Keypad (mounted on Case Front)

12. Case Front

Figure 4-4. VNA Master MS2026B Major Assemblies – Viewed from Top Connector Strip

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-7

4-8 Internal Anatomy of the VNA Master MS2026B Assembly Removal and Replacement

12 13 14

MS2026B View from Bottom

1. Case Back

2. VNA Module Assembly with N (f) Connectors

3. Power Monitor Option 5 PCB Assembly (behind connector strip)

4. Main PCB Assembly

5. LCD Backlight Power Inverter PCB (mounted on Main PCB Assembly)

6. GPS Module Option 31 PCB Assembly

7. LCD Display (mounted on Main PCB Assembly)

8. Hand Strap (mounted on Case Front)

9. Rotary Knob and Rotary Encoder (mounted on Case Front)

10. Main Keypad (mounted on Case Front)

11. Soft Key Keypad (mounted on Case Front)

12. Case Front

13. Battery

14. Battery Door

Figure 4-5. VNA Master MS2026B Major Assemblies – Viewed from Bottom

4-8 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-9 Internal Anatomy of the VNA Master MS2028B

4-9 Internal Anatomy of the VNA Master MS2028B

MS2028B View from Top Connector Strip

1. Case Back and Mounting Screws

2. VNA Module Assembly with N (f) Connectors and Mounting Screws

3. Power Monitor Option 5 PCB Assembly (behind connector strip)

4. Main PCB Assembly with Hex (m-f) Standoffs

5. LCD Backlight Power Inverter PCB (mounted on Main PCB Assembly)

6. GPS Module Option 31 PCB Assembly

7. LCD Display (mounted on Main PCB Assembly)

8. Hand Strap (mounted on Case Front)

9. Rotary Knob and Rotary Encoder (mounted on Case Front)

10. Main Keypad (mounted on Case Front)

11. Soft Key Keypad (mounted on Case Front)

12. Case Front

Figure 4-6. VNA Master MS2028B Major Assemblies – Viewed from Top Connector Strip

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-9

4-9 Internal Anatomy of the VNA Master MS2028B Assembly Removal and Replacement

12 13 14

MS2028B View from Bottom

1. Case Back and Mounting Screws

2. VNA Module Assembly with N (f) or K (f) Connectors

3. Power Monitor Option 5 PCB Assembly (behind connector strip)

4. Main PCB Assembly

5. LCD Backlight Power Inverter PCB (mounted on Main PCB Assembly)

6. GPS Module Option 31 PCB Assembly

7. LCD Display (mounted on Main PCB Assembly)

8. Hand Strap (mounted on Case Front)

9. Rotary Knob and Rotary Encoder (not shown, mounted on Case Front)

10. Main Keypad (mounted on Case Front)

11. Soft Key Keypad (mounted on Case Front)

12. Case Front

13. Battery

14. Battery Door

Figure 4-7. VNA Master MS2028B Major Assemblies – Viewed from Bottom

4-10 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-10 Disassembly Sequence Overview

4-10 Disassembly Sequence Overview

The following steps reduces the VNA Master MS202XB to its replaceable component parts:

1. Remove the Battery Door and the Battery.

2. Remove the Handle Hand Strap.

3. Remove the Rotary Encoder Knob.

4. Remove the Soft Key Keypad Bezel, Membrane, and PCB.

5. Remove the Main Key Keypad Bezel, Membrane, and PCB.

6. Open the case and remove the Case Back Assembly

7. Remove the castellated BNC dress nut from the Ext Trig Input BNC connector on the Connector Face

Plate. Leave the BNC connector and its coaxial cable in place.

8. If the Power Monitor PCB Assembly Option 005 is equipped, remove the Detector connector flex cable from the Power Monitor PCB. Remove the three screws, and protecting the underlying header pins, remove the Power Monitor PCB.

9. Disconnect the GPS Antenna SMA connector and cable from the Connector Face Plate.

10. Remove the VNA Module and the attached Connector Face Plate.

11. Remove the Rotary Encoder from the case.

12. Disconnect the three (3) coaxial cables attached to the Main PCB Assembly

13. Remove the GPS Receiver Module PCB Option 31 from the Main PCB Assembly.

14. Remove the Main PCB Assembly.

15. Flip the Main PCB Assembly over so that the LCD display is up and remove the LCD Display Backlight

Power Inverter PCB Assembly.

16. Remove the LCD Display Assembly from the Main PCB Assembly.

17. Remove the Clear Plastic LCD Protector from the Case Front.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-11

4-11 Open the Instrument Case Assembly Removal and Replacement

4-11 Open the Instrument Case

This procedure provides instructions for opening the VNA Master case. With the case opened, the internal assemblies can be removed and replaced, as detailed in the following sections. Opening the instrument case provides access for the following replacement assemblies:

• Power Monitor PCB Assembly

• VNA Module Assembly

• GPS Receiver Module Option 31

• Rotary Encoder

• Main PCB Assembly

• LCD Display PCB Assembly

• LCD Backlight Power Inverter PCB Assembly

• Clear Plastic LCD Protector

These parts can be replaced without opening the case:

• Main Keypad Membrane

• Main Keypad PCB Assembly

• Soft Key Keypad Membrane

• Soft Key Keypad PCB Assembly

• Rotary Knob

• Hand Strap Handle

• Battery and Battery Door

Procedure

1. As shown below (Figure 4-8), place the VNA Master MS202XB face down on a clean, stable work surface that will not scratch the front panel.

2. Remove the battery door and battery:

• See Section 3-4 – Battery Pack Removal and Replacement on page 3-3.

4-12 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-11 Open the Instrument Case

3. Use a Phillips screwdriver to remove the four (4) Pan Head Phillips Head screws securing the two Case halves together.

1. Remove Battery Cover and Battery

2. Orient case with top Connector Panel as shown

3. Remove two (2) Phillips-head screws at top

4. Remove two (2) Phillips-head screws at bottom

5. At both ends of the Case Rear, lift up both ends evenly. The top Connector Panel stays with the Case Front Assembly.

Figure 4-8. Opening the Case

4. Carefully lift up on the sides of the case shown and begin to separate the two halves.

• The connector mounting strip stays with the front half of the case.

5. The two halves of the instrument can now be safely separated. Set the Case Rear Assembly aside. The

Case Front Assembly contains all of the serviceable parts.

6. Refer to the following sections to remove and replace specific components of the instrument:

• Section 4-12 – Replace Power Monitor PCB Assembly Option 5 – ND67197 on page 4-15

• Section 4-13 – Replace VNA Module Assembly – ND69866 ND69867 ND70363 on page 4-17

• Section 4-14 – Replace GPS Receiver Module Option 31 – ND70320 on page 4-24

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-13

4-11 Open the Instrument Case Assembly Removal and Replacement

• Section 4-15 – Replace Rotary Encoder – 3-410-101 on page 4-27

• Section 4-16 – Remove Main PCB Assembly on page 4-30

• Section 4-17 – Replace Main PCB Assembly – ND69864, ND69865 on page 4-34

• Section 4-18 – Replace LCD Backlight Inverter PCB Assembly – 3-61362 on page 4-38

• Section 4-19 – Replace LCD Display PCB Assembly – 3-15-118 on page 4-39

• Section 4-20 – Replace Clear Plastic LCD Protector – 3-61368 on page 4-40

Note

Proper routing of the cables is important for instrument performance and being able to reassemble the case halves.

4-14 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-12 Replace Power Monitor PCB Assembly Option 5 – ND67197

3 4

4-12 Replace Power Monitor PCB Assembly Option 5 – ND67197

This procedure provides instructions for replacing the Power Monitor PCB Assembly Option 5 and its related Detector connector.

Part Number

• ND67197 – Power Monitor PCB Assembly

• Includes the BNC connector on Flex Board and mounting hardware.

Procedure

1. Open the case as described above Section 4-11 – Open the Instrument Case on page 4-12.

2. Locate the Power Monitor Assembly PCB Option as shown in the figure below.

1. Optional Power Monitor PCB Assembly - Option 5

2. Removable Flex Cable 4-Pin connector between Detector connector (on Face Plate) and Power Monitor PCB.

3. Mounting screws (3 each), removed here

4. Mounting hole on Face Plate for removed Ext. Trig BNC connector.

5. Location of Header and M-M Header Pin Strip under PCB between Power Monitor and VNA Assembly PCBs

6. Ext. Trig BNC connector that must be removed to access a VNA Module PCB mounting screw (not shown).

Figure 4-9. Power Monitor PCB Assembly - Option 5

Disconnect Detector Connector Flex Cable

3. Pry out the Connector Flex Cable attached to the Detector connector from the Power Monitor PCB.

4. Remove the three (3) Phillips head screws from the Power Monitor PCB.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-15

4-12 Replace Power Monitor PCB Assembly Option 5 – ND67197 Assembly Removal and Replacement

5. Holding the Connector Flex PCB Cable away from the Power Monitor PCB, gently lever up the PCB out of its header socket.

Check Header Pins

6. If the M-M Header Pins stay on the VNA Module PCB, remove the pins and re-install them on the Power Monitor PCB.

Power Monitor Detector Connector

7. To remove the Power Monitor Detector connector from the Connector Face Plate, use a 5.5 mm angled-head open end wrench to undo the two M3 x 0.5 Kep Nuts with lock washers.

8. When the nuts are removed, pull the Power Monitor Detector connector towards the VNA Module PCB until it clears the Connector Face Plate and set aside with the Power Monitor PCB.

Install Replacement Power Monitor PCB

9. Install the replacement Power Monitor Detector connector into the Connector Face Plate. Note that the Flex Cable must oriented above the Connector. Reinstall and tighten the two M3 x 0.5 Kep Nuts.

10. Holding the Flex Cable up, reinstall the Power Monitor PCB.

• Use extreme care so as to not bend any of the header pins as they mate with a header strip on the

VNA Module.

• Be careful to not offset the header pins by one row.

11. Press on either side of the header strip to mate the two connectors.

12. Inspect the Header connectors from the side to make sure all pins are correctly inserted and no pins are

bent.

13. Reinstall and tighten the three (3) Phillips head screws holding the Power Monitor PCB to the VNA Module PCB.

Connect Detector Flex Cable

14. Insert the 4-pin header on the end of the Detector Connector Flex Cable into the Power Monitor PCB.

15. Make sure all cables are clear from the Case assemblies.

Replace Case Rear Assembly and Battery

16. Replace the Case Bottom Assembly, making sure the Connector Face Plate is correctly centered in its mounting groove. Insert and tighten the four case mounting screws.

17. Re-install the Battery.

18. Re-install the Battery Door.

4-16 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363

4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363

This replacement procedure provides instructions for replacing the VNA Modules for all variants of the MS202XB VNAs. In general, the VNA Module is removed as a complete unit and then exchanged for a replacement part.

Part Numbers

• ND69866 – VNA Module Assembly with N(f) connectors for MS2026B

• For MS2026B instruments equipped with standard N (f) Test Ports

• ND69867 – VNA Module Assembly with N(f) connectors for MS2028B

• For MS2028B instruments equipped with standard N (f) Test Ports

• ND70363 – VNA Module Assembly with K (f) connectors for MS2028B

• For MS2028B instruments equipped with Option 11 K (f) Test Ports

Procedure

Open the Case

1. Open the case as described above Section 4-11 – Open the Instrument Case on page 4-12.

Remove Power Monitor PCB Option 5

2. If the Power Monitor PCB Option 5 is NOT installed, skip ahead to Step 3. If the Power Monitor PCB is installed, perform the substeps immediately below.

a. See Figure 4-9 on page 4-15 above for Power Monitor PCB connectors and orientation. Pry out the

flex cable attached to the Detector connector from the Power Monitor PCB.

b. Remove the three Phillips head screws from the Power Monitor PCB.

c. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input

connector. Leave the Ext Trig Input connector and its attached coaxial cable loosely in place in the Connector Face Plate.

d. Holding the Connector Flex Cable away from the Power Monitor PCB, gently lever up the PCB out

of its header socket.

e. If the Header Pins stay on the VNA Module PCB, remove the pins and re-install them on the

Power Monitor PCB.

f. Set the Power Monitor PCB assembly with header pins aside.

g. Removing the Power Monitor PCB provides access to the Ext Trig Input BNC connector and a

VNA Module PCB mounting screw.

Disconnect GPS Antenna Cable

3. If the GPS Receiver Module PCB Option 31 is NOT installed, skip ahead to Step 4. If the GPS Receiver Module PCB is installed, perform the substeps immediately below:

a. Use two 5/16” (≅ 8 mm) wrenches to disconnect the GPS Antenna SMA connector from the

Connector Face Plate.

b. Remove the nut and lock washer and then remove the SMA connector from the Connector Face

Plate.

c. Route the cable to the right side, clearing its notch and the Face Plate, so it is clear of the VNA

Module PCB.

Remove Cables and Ext T rig Input BNC

4. Cut the cable tie that holds the Ext Trig Input and Ext Ref Input coaxial cables to the RF Out hardline coaxial cable.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-17

4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363 Assembly Removal and Replacement

5. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input connector. Pull the Ext Trig Input connector from the Connector Face Plate and position so it is out of the way.

• Removing the Ext Trig Input connector provides access to on the VNA Module PCB mounting screws.

4-18 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363

3 4

Identify VNA Module PCB Assembly Mounting Screws

6. Using the figure below, identify the locations of the eight (8) Phillips-head mounting screws holding the VNA Assembly PCB in place.

1. VNA Module Assembly PCB and related RF Shields with eight (8) total mounting screws

2. Location of Power Monitor Assembly PCB Option 5 with three (3) Phillips-head mounting screws

3. Remove the castellated nut and loosen the Ext Trig Input BNC Connector before removing Power Monitor PCB

4. The first VNA Module Assembly PCB Phillips-head mounting screw under Power Monitor PCB 5, 6, 7, 8, 9, 10, and 11. Additional Phillips-head mounting screws (7 total) holding VNA Module Assembly in place

Figure 4-10. VNA Module Assembly Screw Locations

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-19

4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363 Assembly Removal and Replacement

100 MHz OUT

J2202

100MHz IN

J2200

26MHz OUT

J2201

140MHz IF

J3203

TRIG-IN

J3202

Remove the VNA Module PCB Assembly

7. Using a Phillips head screwdriver, remove the eight (8) screws holding the VNA Module PCB in place.

8. With the Connector Face Plate facing away from you, start lifting up from the right edge of the VNA

Module which disconnects the connector between the VNA Module and the underlying Main PCB Assembly.

9. Lift the VNA Module up towards the top of the case so the MCX Connectors and related cables are accessible near the bottom edge of the case. The figure immediately below (Figure 4-11) shows a schematic of the “folded” PCB orientation. See Figure 4-12 following for a photograph of the actual folded assemblies.

1. Main PCB Assembly, in Case Bottom, facing up.

2. VNA Module Assembly, viewed from bottom, after being “folded” over to left away from Main PCB.

3. 100 MHz Out J2202 MCX connector (not used).

4. 100 MHz In J2200 MCX connector and coaxial cable. Connects to Ext Ref In BNC connector.

5. Ext Ref Input BNC connector on face plate.

6. 26 MHz Out J2201 MCX connector and coaxial cable. Connects to MCX connector on VNA Module RF Shield.

7. Unmarked MCX connector on RF shield on bottom of VNA Module Assembly.

8. TRIG-IN J3202 MCX connector and coaxial cable. Connects to Ext Ref Input BNC connector.

9. Ext Trig Input BNC connector original mounted position on face plate.

10. Ext Trig Input BNC connector and coaxial cable in unmounted position.

11. 140 MHz IF J3203 MCX connector (not used).

Figure 4-11. VNA Module and Main PCB Assembly Coaxial Cable Connections

4-20 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363

10. The figure photograph below shows the “folded” VNA Module Assembly PCB to the left of the next to Case Front with the Main PCB Assemble still in place. Note that both units are still connected with RF coaxial cables.

1. VNA Module PCB Assembly

2. Top Connector Panel

3. Main PCB Assembly attached to Case Front

4. Hex Standoffs (8 each) holding Main PCB in place

5. Phillips-head screws (3 each) holding Main PCB in place

6. Rotary Encoder, cable, and connector to Main PCB

7. GPS Module PCB Assembly, mounting screws (2 each), and GPS Antenna SMA connector (removed from Top Connector Panel)

8. Main PCB RF shield with coaxial cable connection labeling

9. Coaxial cable between Main PCB and Ext Ref Input BNC connector on Connector Panel. On the Main PCB, connects to the J2200 100 MHz In MCX connector

10. Ext Trig Input BNC connector and cable removed from Top Connector Panel

11. Original position of Ext Trig Input BNC connector

12. Ext Ref Input BNC connector

13. Detector connector (for removed Power Monitor PCB Assembly)

Figure 4-12. “Folded” VNA Module (on left) and Main PCB and Case Front (on right)

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-21

4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363 Assembly Removal and Replacement

11. On the Main PCB Assembly, remove the cable from the J2200 100 MHz MCX connector. This cable stays with the VNA Module connected to the Ext Ref In connector.

12. On the upside down VNA Assembly, remove the single cable near the upper center of the board. This cable stays with the Main PCB and is connected to the J2201 26 MHz Out MCX Connector.

13. On the Main PCB Assembly, remove the cable from the J3202 Trig In MCX connector. This cable stays with the VNA Module.

14. Remove the VNA Module PCB and set it aside.

Prepare the Replacement VNA Module

15. Prepare the replacement VNA Module by remove the Ext Trig In BNC connector and its attached cable.

16. If equipped with the GPS Receiver Module Option 31, remove the hole plug for the GPS Antenna from the

Face Plate.

17. If equipped with the Power Monitor Option 5, remove the hole plug for the Detector from the Face Plate

prior to installing the PCB as described in the steps below.

Install the Replacement VNA Module

18. Position the replacement VNA Module upside down next to the Case Bottom Assembly. See Figure 4-11

on page 4-20 above for general orientation.

19. Connect the cable from the J2201 MCX Connector on the Main PCB to the MCX Connector in the upper middle of the replacement VNA Module Assembly.

20. Route the cable from the Ext Trig Ref connector through the notch to the Main PCB and connect it to the J2200 Ext Ref In MXC connector.

21. Route the cable from the Ext Trig Input connector through the notch to the Main PCB and connect it to the J3202 Trig In MXC connector.

22. “Fold” the VNA Module over above the Main PCB Assembly so that it is approximately 30 mm (1.5”) from the right edge of the case.

23. If the GPS Receiver Module PCB Option 31 is not installed, skip ahead to Step 24. If the GPS Receiver Module PCB is installed, perform the substeps immediately below:

a. Route the GPS Antenna Cable with its SMA connector from the Main PCB, through the notch

between the Face Plate and the PCB, and into its position in the Face Plate.

b. Install the lock washer and then the nut, and tighten.

c. Use two 5/16” (~8 mm) wrenches to connect the GPS Antenna SMA connector to the Connector

Face Plate.

24. Carefully position the VNA Module PCB assembly over the Main PCB and the eight (8) hex standoffs.

25. Make sure the two connectors are loosely engaged.

26. Once the connectors and the standoffs are correctly aligned, press the VNA Module connector into the

mating connector on the Main PCB.

27. Fasten the VNA Module PCB into place using (8) Phillips head screws.

Install the Power Monitor PCB Option 5

28. If the Power Monitor PCB Option 5 is not installed, skip ahead to Step 29. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. Insert the Detector connector with the Flex Cable into the Detector hole on the Face Plate.

b. The Flex Cable must oriented above the Connector. Reinstall and tighten the two M3 x 0.5 Kep

Nuts using the 5.5mm angled-head open end wrench.

c. Carefully position the Power Module Assembly over its mounting standoffs.

d. Use extreme care so as to not bend any of the header pins.

4-22 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-13 Replace VNA Module Assembly – ND69866 ND69867 ND70363

e. Be careful to not offset the header pins by one row.

f. Make sure the pins are loosely but correctly positioned before proceeding.

g. When perfectly aligned, press on either side of the header strip to mate the two connectors.

h. When the Power Monitor PCB is fully seated, inspect Header connectors from the side to make

sure all pins are correctly inserted and no pins are bent.

i. Install the three (3) Phillips head screws holding the Power Monitor PCB in place.

j. Gently fold over the Flex Cable and insert it into the four connector socket on the PCB.

Install the Ext Trig BNC Connector and Dress Cables

29. Reinstall the Ext Trig Input BNC connector in the Face Place. Use the Tool T1451 socket to tighten the BNC Connector Dress Nut.

30. Make sure all cables are clear of the case edges.

31. Install a cable tie over the two coax cables and the RF hardline to keep them in place.

Replace Case Rear Assembly

32. Replace the Case Bottom Assembly, making sure the Connector Face Plate is correctly centered in its mounting groove and that all cables are clear. Insert and tighten the four case mounting screws.

33. Re-install the Battery.

34. Re-install the Battery Door.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-23

4-14 Replace GPS Receiver Module Option 31 – ND70320 Assembly Removal and Replacement

4-14 Replace GPS Receiver Module Option 31 – ND70320

This replacement procedure provides instructions for replacing the GPS Receiver Module mounted on the Main PCB Assembly for all variants of the MS202XB VNAs. The basic procedure is to open the case, remove the VNA Module, and then service the GPS Module.

Part Numbers

• ND70320 – GPS Receiver Module, Option 31

• For MS2026B instruments equipped with Option 31 GPS Receiver

• For MS2028B instruments equipped with Option 31 GPS Receiver

• Includes SMA face plate connector and cable to Receiver Module

• Does not include GPS Antenna 2000-1528-R

Procedure

Open the Case

1. Open the case as described above Section 4-11 – Open the Instrument Case on page 4-12.

Remove Power Monitor PCB Option 5

2. If the Power Monitor PCB Option 5 is NOT installed, skip ahead to Step 3. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. See Figure 4-9 on page 4-15 above for Power Monitor PCB connectors and orientation. Pry out the

flex cable attached to the Detector connector from the Power Monitor PCB.

b. Remove the three Phillips head screws from the Power Monitor PCB.

c. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input

connector. Leave the Ext Trig Input connector and its attached coaxial cable loosely in place in the Connector Face Plate.

d. Holding the Connector Flex Cable away from the Power Monitor PCB, gently lever up the PCB out

of its header socket.

e. If the Header Pins stay on the VNA Module PCB, remove the pins and re-install them on the

Power Monitor PCB.

f. Set the Power Monitor PCB assembly with header pins aside.

g. Removing the Power Monitor PCB provides access to the Ext Trig Input BNC connector and a

VNA Module PCB mounting screw.

Disconnect GPS Antenna Cable

3. Disconnect the GPS Antenna SMA connector from the Connector Face Plate by performing the substeps immediately below:

a. Use two 5/16” (≅ 8 mm) end wrenches to disconnect the GPS Antenna SMA connector from the

Connector Face Plate.

b. Pull off the nut and lock washer and remove the SMA connector from the Connector Face Plate.

c. Route the cable to the right side, clearing its notch and the Face Plate, so it is clear of the VNA

Module PCB and the Case Front Assembly.

Remove Ext Trig Input BNC Connector

4. Cut the cable tie that holds the Ext Trig Input and Ext Ref Input coaxial cable to the RF Out hardline.

5. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input connector.

Pull the Ext Trig Input connector from the Connector Face Plate and position so it is out of the way.

• Removing the Ext Trig Input connector provides access to on the VNA Module PCB mounting screws.

4-24 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-14 Replace GPS Receiver Module Option 31 – ND70320

6. Using a Phillips head screwdriver, remove the eight (8) screws holding the VNA Module PCB in place.

Partially Remove the VNA Module PCB Assembly

7. With the Connector Face Plate facing away from you, start lifting up from the right edge of the VNA Module which disconnects the connector between the VNA Module and the underlying Main PCB Assembly.

8. Move VNA Module to left about 3 cm (1.5”) to expose the antenna cable attached to the underlying GPS Receiver Module.

Disconnect the GPS Antenna Cable

9. Use needle-nose pliers to remove the MCX RF coaxial connector from the GPS Receiver Module.

10. Move the VNA Module further to the right to fully expose the GPS Receiver Module.

Remove the GPS Receiver Module

11. Undo the two screws holding the GPS Receiver Module in place.

12. Gentle pull the GPS Receiver Module straight up to disconnect its 14-pin header connector. The header

pins should stay with the GPS Module.

Prepare and Install the Replacement GPS Receiver Module

13. Remove the GPS Module from its packing material and prepare it for installation.

14. Position the replacement GPS Receiver Module so that it is lined up with its mounting holes and 14-pin

header connector observing the following:

a. Carefully position the GPB Receiver Module PCB over its mounting standoffs.

b. Use extreme care so as to not bend any of the header pins.

c. Be careful to not offset the header pins by one row.

d. Make sure the header pins are loosely but correctly positioned before proceeding.

e. When perfectly aligned, press on either side of the header strip to mate the two connectors.

15. Insert and tighten the two Phillips mounting screws.

• Note that these screws are shorter than the screws used to hold the VNA Module in place.

Install the GPS Antenna Cable and SMA Connector

16. Snap the GPS Antenna Cable MCX connector into place on the GPS Receiver Module. Position the Antenna Cable off the right side of the Case.

17. “Fold” the VNA Module PCB back into position over the Main PCB and the eight (8) hex standoffs so it is loosely positioned.

18. Route the GPS Antenna Cable with SMA connector in the slot between the Connector Face Plate and the PCB, until the cable is correctly positioned in the PCB notch cutout.

19. Install the SMA connector into the Face Plate, add the lock washer, and finally the nut.

20. Use two 5/16” (≅ 8 mm) wrenches to tighten the GPS Antenna SMA connector to the Connector Face

Plate.

Install the VNA Module

21. Position the VNA Module as accurately as possible over the Main PCB Assembly observing the following:

• The two mating connectors on the right side of the PCBs are loosely engaged.

• The fan and other cables on the left side of the Case are clear of the hex standoffs and the Case

edge.

• The GPS Antenna Cable is correctly routed between the Face Plate and the PCB and is located in its notch.

• The three coaxial cables between the two PCBs are on the OUTSIDE of the hex standoffs and also clear of the Case edge.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-25

4-14 Replace GPS Receiver Module Option 31 – ND70320 Assembly Removal and Replacement

22. Once the connectors and the standoffs are correctly aligned, press the VNA Module connector into the mating connector on the Main PCB.

23. Make sure the Connector Face Plate is correctly positioned in its mounting grove.

24. Fasten the VNA Module PCB into place using (8) Phillips head screws.

Install the Power Monitor PCB

25. If the Power Monitor PCB Option 5 is not installed, skip ahead to Step #26. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. Insert the Detector connector with the Flex Cable into the Detector hole on the Face Plate.

b. The Flex Cable must oriented above the Connector. Reinstall and tighten the two M3 x 0.5 Kep

Nuts using the 5.5mm angled-head open end wrench.

c. Carefully position the Power Module Assembly over its mounting standoffs.

d. Use extreme care so as to not bend any of the header pins.

e. Be careful to not offset the header pins by one row.

f. Make sure the pins are loosely but correctly positioned before proceeding.

g. When perfectly aligned, press on either side of the header strip to mate the two connectors.

h. When the Power Monitor PCB is fully seated, inspect the header connectors from the side to make

sure all pins are correctly inserted and no pins are bent.

i. Install the three (3) Phillips head screws holding the Power Monitor PCB in place.

j. Gently fold over the Flex Cable and insert it into the four-connector socket on the PCB. See

Figure 4-9 on page 4-15 for Power Monitor PCB and Connector orientation.

Install the Ext Trip Input BNC

26. Reinstall the Ext Trig Input BNC connector and coaxial cable into the Face Place. Route the coaxial cable under the RF hardline and use the Tool T1451 socket to tighten the BNC Connector Dress Nut.

27. Make sure all cables are clear of the case edges.

28. Install a cable tie over the two coaxial cables and the RF hardline to keep them in place.

Install Case Bottom Assembly and Battery

29. Replace the Case Bottom Assembly, making sure the Connector Face Plate is correctly centered in its mounting groove and that all cables are clear. Insert and tighten the four case mounting screws.

30. Reinstall the Battery.

31. Reinstall the Battery Door.

4-26 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-15 Replace Rotary Encoder – 3-410-101

4-15 Replace Rotary Encoder – 3-410-101

Replacing the Rotary Encoder involves removing the Rotary Knob, and then opening the case and partially removing the VNA Module PCB Assembly. If the Power Monitor PCB Option 5 is installed, this PCB must be removed. If the GPS Receiver Module Option 31 is installed, the GPS Antenna must be disconnected. Once the VNA Module Assembly is “folded” out of the way, the Rotary Encoder mounting hardware can be loosened from the Front Panel, and its cable detached from the Main PCB Assembly. The Main PCB Assembly need not be removed to replace the Rotary Encoder.

Part Numbers

• 3-410-101 – Rotary Encoder

• For either MS2026B or MS2028B instruments

• Includes the connection cable to the Main PCB Assembly.

• Does not include the Rotary Knob – 3-61360-2

Procedure

Remove the Rotary Knob

1. Use a flat blade screwdriver and piece of rubber to remove the Rotary Knob.

2. Use a 7/16” (≅ 12 mm) nut driver to remove the nut, lock washer, and flat washer that holds the Encoder

in place.

3. Open the case as described above Section 4-11 – Open the Instrument Case on page 4-12.

Remove Power Monitor PCB Option 5

4. If the Power Monitor PCB Option 5 is NOT installed, skip ahead to Step 5. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. See Figure 4-9 on page 4-15 above for Power Monitor PCB connectors and orientation. Pry out the

flex cable attached to the Detector connector from the Power Monitor PCB.

b. Remove the three Phillips head screws from the Power Monitor PCB.

c. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input

connector. Leave the Ext Trig Input connector and its attached coaxial cable loosely in place in the Connector Face Plate.

d. Holding the Connector Flex Cable away from the Power Monitor PCB, gently lever up the PCB out

of its header socket.

e. If the Header Pins stay on the VNA Module PCB, remove the pins and re-install them on the

Power Monitor PCB.

f. Set the Power Monitor PCB assembly with header pins aside.

g. Removing the Power Monitor PCB provides access to the Ext Trig Input BNC connector and a

VNA Module PCB mounting screw.

Remove the Ext Trig Input BNC Connector

5. Cut the cable tie that holds the Ext Trig Input and Ext Ref Input coaxial cable to the RF Out hardline.

6. Using the Anritsu Tool T1451, the castellated socket, remove the BNC Connector Dress Nut from the Ext

Trig Input connector. Pull the Ext Trig Input connector from the Connector Face Plate and position so it is out of the way.

• Removing the Ext Trig Input connector provides access to one the VNA Module PCB mounting screws.

Remove the VNA Module PCB Assembly

7. Using a Phillips head screwdriver, remove the eight (8) screws holding the VNA Module PCB in place.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-27

4-15 Replace Rotary Encoder – 3-410-101 Assembly Removal and Replacement

8. With the Connector Face Plate facing away from you, start lifting up from the right edge of the VNA Module which disconnects the connector between the VNA Module and the underlying Main PCB Assembly.

Remove the GPS Receiver Module Option 31

9. If the GPS Receiver Module PCB Option 31 is not installed, skip ahead to Step 10. If it is installed, perform the substeps immediately below:

a. Move VNA Module to the left about 3 cm (1.5”) to expose the antenna cable attached to the GPS

Receiver Module.

b. Use needle-nose pliers to remove the MCX RF coaxial connector from the GPS Receiver Module.

c. Leave the GPS Antenna SMA connector attached to the Connector Face Plate.

Move the VNA Module

10. “Fold” the VNA Module PCB off the Main VNA PCB Assembly so that their bottom edges are next to each other and they are still connected with three coaxial cables. See Figure 4-11 on page 4-20 for VNA Module, Main PCB Assembly, and coaxial cable routing. See Figure 4-12 on page 4-21 for a photograph of the “folded” assemblies.

11. Remove the Rotary Encoder

12. On the inside of the case, disconnect the Rotary Encoder cable from the Main PCB Assembly.

13. Remove the old Rotary Encoder and its attached cable from the case and set aside.

Install Replacement Rotary Encoder

14. Position the replacement Rot ary Encoder in the case with the cable connector towards the center of the

Case.

15. Connect the Rotary Encoder cable to the Main PCB Assembly. The cable connector goes into the PCB connector on the side away from the Encoder with the connector ridges up. Coil up excess cable on top of the encoder PCB.

16. From the front panel, add in sequence the flat washer, lock washer, and nut. Tighten the nut to hold in place using the 7/16” (≅ 12 mm) nut driver.

Install GPS Receiver Module Option 31

17. If the GPS Receiver Monitor PCB Option 31 is not installed, skip ahead to Step 18. If it is installed, perform the substeps immediately below:

a. “Fold” the module back over the Main PCB Assembly offset approximately 30 mm (1.5”) to the left

so that the GPS Receiver Module and its antenna connector are visible.

b. Route the GPS Antenna Cable MCX connector into place to the GPS Receiver Module.

c. Use needle-nose pliers to connect the MCX connector to the GPS Receiver Module.

VNA Module

18. “Fold” the VNA Module PCB back into position over the Main PCB and the eight (8) hex standoffs so it is loosely positioned.

19. Position the VNA Module as accurately as possible over the Main PCB Assembly observing the following:

a. The upper and lower connectors on the right side of the PCBs are loosely engaged.

b. The fan and other cables on the left side of the Case are clear of the hex standoffs.

c. The GPS Antenna Cable is correctly routed between the Face Plate and the PCB and is located in

its notch.

d. The three coaxial cables between the two PCBs are on the OUTSIDE of the hex standoffs.

e. The PCB mounting holes are correctly aligned with the hex standoffs.

4-28 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-15 Replace Rotary Encoder – 3-410-101

20. Once the connectors and the standoffs are correctly aligned, press the VNA Module connector into the mating connector on the Main PCB.

21. Make sure the Connector Face Plate is correctly positioned in its mounting grove.

22. Fasten the VNA Module PCB into place using (8) Phillips head screws.

Install Power Monitor PCB Option 5

23. If the Power Monitor PCB Option 5 is not installed, skip ahead to Step 24. If it is installed, perform the substeps immediately below:

a. Insert the Detector connector with the Flex Cable into the Detector hole on the Face Plate.

b. The Flex Cable must oriented above the Connector. Reinstall and tighten the two M3 x 0.5 Kep

Nuts using the 5.5 mm angled-head open end wrench.

c. Carefully position the Power Module Assembly over its mounting standoffs.

d. Use extreme care so as to not bend any of the header pins.

e. Be careful to not offset the header pins by one row.

f. Make sure the pins are loosely but correctly positioned before proceeding.

g. When perfectly aligned, press on either side of the header strip to mate the two connectors.

h. When the Power Monitor PCB is fully seated, inspect the header connectors from the side to make

sure all pins are correctly inserted and no pins are bent.

i. Install the three (3) Phillips head screws holding the Power Monitor PCB in place.

j. Gently fold over the Flex Cable and insert it into the four-connector socket on the PCB. See

Figure 4-11 on page 4-20 for coaxial cable connections between the VNA Module and the Main

PCB Assembly. See Figure 4-12 on page 4-21 for a photograph of the “folded” assemblies.

Install the Ext Trig Input BNC

24. Install the Ext Trig Input BNC connector and coaxial cable into the Face Place.

25. Route the coaxial cable UNDER the RF hardline and use the Tool T1451 socket to tighten the BNC

Connector Dress Nut.

26. Make sure all cables are clear of the case edges.

27. Install a cable tie over the two coaxial cables and the RF hardline to keep them in place.

Install the Case Bottom Assembly and Battery

28. Replace the Case Bottom Assembly, making sure the Connector Face Plate is correctly centered in its mounting groove and that all cables are clear. Insert and tighten the four case mounting screws.

29. Install the Battery.

30. Install the Battery Door.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-29

4-16 Remove Main PCB Assembly Assembly Removal and Replacement

4-16 Remove Main PCB Assembly

This procedure covers removing the Main PCB Assembly from the MS2026B and MS2028B instruments by removing the Power Monitor PCB Assembly (if installed), the VNA Module PCB Assembly, the GPS Receiver Module (if installed), and finally the Main PCB Assembly. Once the Main PCB Assemble is removed, separate replacement procedures are available:

• Section 4-17 – Replace Main PCB Assembly – ND69864, ND69865 on page 4-34

• Section 4-18 – Replace LCD Backlight Inverter PCB Assembly – 3-61362 on page 4-38

• Section 4-19 – Replace LCD Display PCB Assembly – 3-15-118 on page 4-39

• Section 4-20 – Replace Clear Plastic LCD Protector – 3-61368 on page 4-40

Once the required replacement units are installed, the final procedure describes how to reinstall the Main PCB Assembly, GPS Receiver Module, VNA Module, Power Monitor PCB, and finally close the case:

• Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41

Procedure

1. Place the instrument face up on a protected work surface oriented with the Connector Strip away from you.

2. Remove the Battery Door and the Battery.

3. Using the medium flat blade screwdriver and a piece of protective rubber, remove the Rotary Knob by

sliding the screwdriver under the knob and levering it up gently.

Remove Key Pad Bezels, Membranes, and PCB Assemblies

4. The Soft Key Keypad and the Main Keypad and Switch assembly should be removed before proceeding to protect the header pins that connect the Main Keypad Switch PCB to the Main PCB. This header pin connector is particularly vulnerable during the reassembly process.

5. Remove the Soft Key Keypad Bezel.

6. There are six (6) locking tabs holding the Soft Key Keypad Bezel to the case as shown below in

Figure 4-19

Caution

Exercise extreme caution working around the LCD Display. Do not press in the middle of the display nor set any tools on it.

1. Location of three (3) upper locking tabs on the Soft Key Switch Bezel and underlying Soft Key Membrane.

2. Location of three (3) lower locking tabs.

Figure 4-13. Locking Tab Locations for Soft Key Keypad Bezel

4-30 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-16 Remove Main PCB Assembly

7. Using a small flat blade screwdriver, carefully pry the six (6) Soft Key Keypad Bezel locking tabs free of the main body of the case.

• The flat blade width must be less than 3.5 mm (0.13”) wide and as thin as possible. If available, recommended is a screwdriver made of fiberglass or other material that will not scratch the bezel.

• As each locking tab releases, the bezel comes up a bit.

• The basic technique is to press the screwdriver straight in between the case and the bezel and then

gently lever the screwdriver AWAY from the bezel so it slightly elevates.

8. When the six locking tabs are released, lift the bezel up and set aside.

9. Remove the existing Soft Key Keypad Membrane and set aside revealing the Soft Key Keypad Flex PCB

cable

Caution

Exercise extreme caution working around the Soft Key Keypad ribbon cable. Do not touch it with a screwdriver or other tool.

10. There are eight (8) locking tabs holding the Main Keypad Bezel to the case as shown in Figure 4-14

1. Location of four (4) left side locking tabs on the Main Keypad Switch Bezel.

2. Location of four (4) right side locking tabs.

Figure 4-14. Main Keypad Bezel Locking Tab Locations

11. Using a small flat blade screwdriver, carefully pry the eight (8) Main Keypad Bezel locking tabs free of the main body of the case.

• Use a small piece of rubber gasket or similar material to protect the front panel from the screwdriver.

• The basic technique move a protective piece of rubber next to the slot, press the screwdriver straight in between the case and the bezel, and then gently lever the screwdriver AWAY from the bezel.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-31

4-16 Remove Main PCB Assembly Assembly Removal and Replacement

• As each locking tab releases, the bezel comes up a bit.

The Speaker sits on top of the Main Keypad PCB and is held in place by four locating pins on the inside of the Main Keypad Bezel around the speaker opening. When the keypad bezel is remo ved,

Note

the speaker is held only by the fragile connecting wires. Be careful removing the bezel and membrane as they might inadvertantly contain th e spe aker. The speaker must be detached and left with the underlying PCB before proceeding. Use care not to damag e the speaker wires when removing or replacing the keypad bezel, membrane, or PCB.

12. When the eight locking tabs are released, lift the bezel up, carefully disconnecting the speaker from its mounting pins, and set aside.

13. Protecting the speaker wires, start at the bottom of the Main Keypad Membrane and lift it up and set aside. Hold the edge of the Speaker with one hand and remove the Membrane from one side and then the other side of the Speaker.

14. Gently pull up the Main Keypad PCB straight up as the header pins disconnect from the Main PCB Assembly header. Note that the Soft Key Keypad Flex PCB is attached and both PCB cables must removed as a unit. Set the PCB Assemblies aside, making sure to protect the protruding Header Pin connector.

Open Case

15. Open the case by removing the four (4) fastening screws. Lift up the Case Rear Assembly and set aside.

Remove Power Monitor PCB Option 5

16. If the Power Monitor PCB Option 5 is NOT installed, skip ahead to Step 17. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. See Figure 4-9 on page 4-15 above for Power Monitor PCB connectors and orientation. Pry out the

flex cable attached to the Detector connector from the Power Monitor PCB.

b. Remove the three Phillips head screws from the Power Monitor PCB.

c. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input

connector. Leave the Ext Trig Input connector and its attached coaxial cable loosely in place in the Connector Face Plate.

d. Holding the Connector Flex Cable away from the Power Monitor PCB, gently lever up the PCB out

of its header socket.

e. If the Header Pins stay on the VNA Module PCB, remove the pins and re-install them on the

Power Monitor PCB.

f. Set the Power Monitor PCB assembly with header pins aside.

g. Removing the Power Monitor PCB provides access to the Ext Trig Input BNC connector and a

VNA Module PCB mounting screw.

Remove Ext Trig Input BNC Connector

17. Cut the cable tie that holds the Ext Trig Input and Ext Ref Input coaxial cable to the RF Out hardline.

18. Using the Tool T1451 socket, remove the BNC Connector Dress Nut from the Ext Trig Input connector.

Pull the Ext Trig Input connector from the Connector Face Plate and position it out of the way.

• Removing the Ext Trig Input connector provides access to one of the VNA Module PCB mounting screws.

Remove VNA Module PCB

19. Using a Phillips head screwdriver, remove the eight (8) screws holding the VNA Module PCB in place.

20. With the Connector Face Plate facing away from you, start lifting up from the right edge of the VNA

Module which disconnects the connector between the VNA Module and the underlying Main PCB Assembly.

4-32 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-16 Remove Main PCB Assembly

Remove GPS Receiver Module PCB Option 31

21. If the GPS Receiver Module PCB Option 31 is not installed, skip ahead to Step 22. If it is installed, perform the substeps immediately below:

a. Move VNA Module to right about 3 cm (1.5”) to expose the antenna cable attached to the GPS

Receiver Module.

b. Use needle-nose pliers to remove the MCX RF coaxial connector from the GPS Receiver Module

PCB.

c. Move the VNA Module further to the left to fully expose the GPS Receiver Module.

d. Undo the two screws holding the GPS Receiver Module in place.

e. Gentle pull the GPS Receiver Module straight up to disconnect its 14-pin header connector.

Remove Coaxial Cables

22. Using needle-nose pliers, remove the three attached coaxial cables from the Main PCB Assembly at the following locations. All three cables route to locations on the VNA Module Assembly PCB. Leave the cables attached to the VNA Module.

• J2200 100 MHz In – Cable connected to the Ext Ref In BNC connector on the VNA Module.

• J2201 26 MHz Out – Cable connected to the bottom RF shield on the VNA Module.

• J3202 Trig In – Cable connected to the Ext Trig In BNC connector on the VNA Module. See

Figure 4-9 on page 4-15 for coaxial cable connections between the VNA Module and the Main PCB

Assembly.

Note

On the Main PCB Assembly, the MCX connectors for J2202 100 MHz Out and J3203 140 MHz IF are not used.

Remove Main PCB Assembly

23. Remove the eight (8) hex standoffs and two (2) Pan Head screws holding the Main PCB Assembly to the Case Front Assembly. See Figure 4-12 on page 4-21 above for hex standoff and screw locations.

24. Near the left side of the case, disconnect the cable from the Rotary Encoder PCB. The Rotary Encoder stays mounted in the Case Front Assembly.

25. Near the left bottom of the case, disconnect the Battery Cable and the Fan Cable from the Main PCB and fold them over the case edge clear of the PCB.

26. At this point, proceed with any of the following replacement procedures described in the sections below:

• Section 4-17 – Replace Main PCB Assembly – ND69864, ND69865 on page 4-34

• Section 4-18 – Replace LCD Backlight Inverter PCB Assembly – 3-61362 on page 4-38

• Section 4-19 – Replace LCD Display PCB Assembly – 3-15-118 on page 4-39

• Section 4-20 – Replace Clear Plastic LCD Protector – 3-61368 on page 4-40

27. Once the required replacement procedures are complete, reassemble the instrument using the procedure

at the end of this chapter:

• Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-33

4-17 Replace Main PCB Assembly – ND69864, ND69865 Assembly Removal and Replacement

4-17 Replace Main PCB Assembly – ND69864, ND69865

This procedure assumes that the Main PCB Assembly has been removed from the instrument as described above in Section 4-16 – Remove Main PCB Assembly on page 4-30 and that the Main PCB Assembly is to be replaced. The basic replacement procedure is the same for MS2026B and MS2028B instruments.

If an assembly mounted on the Main PCB is to be replaced, skip to the appropriate section below:

• Section 4-18 – Replace LCD Backlight Inverter PCB Assembly – 3-61362 on page 4-38

• Section 4-19 – Replace LCD Display PCB Assembly – 3-15-118 on page 4-39

• Section 4-20 – Replace Clear Plastic LCD Protector – 3-61368 on page 4-40

Part Numbers

• ND69864 – Main PCB Assembly for MS2026B instruments

• VNA Module not included

• LCD Display not included

• LCD Power Inverter PCB Assembly not included

• GPS Receiver Module PCB not included

• ND69865 – Main PCB Assembly for MS2028B instruments

• VNA Module not included

• LCD Display not included

• LCD Power Inverter PCB Assembly not included

• GPS Receiver Module PCB not included

Procedure

1. The Main PCB Assembly has been removed from the Case Front Assembly.

Remove the LCD Backlight Power Inverter PCB Assembly

2. Orient the Main PCB with the remaining connectors away from you and the cutout for the Rotary Encoder to the right.

3. Disconnect the LCD 4-pin cable going to the LCD Inverter PCB Assembly.

4-34 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-17 Replace Main PCB Assembly – ND69864, ND69865

• The cable is permanently attached to the LCD Panel

1. LCD Backlight Cable, permanently attached to LCD Assembly.

2. J4005 connector on Power Inverter. Disconnect cable here going to Main PCB Assembly.

3. Remove Phillips-head screws (2 each) and set LCD Backlight Power Inverter PCB Assembly aside.

Figure 4-15. LCD Backlight Power Inverter PCB Assembly Screws and Cables

4. Remove the two (2) Phillips head screws holding the LCD Inverter PCB Assembly in place.

• There is no header pin connector under the LCD Inverter PCB.

5. Remove the LCD Backlight Power Inverter PCB Assembly and set aside.

a. At this point, if the LCD Backlight Power Inverter PCB assembly is to be replaced, stop

disassembling the Main PCB.

b. Prepare the replacement LCD Backlight Power Inverter PCB.

c. Skip ahead and install it as described below in Step #10.

Remove the LCD Display

6. Disconnect the remaining left side LCD multi-pin cable going to J4003 on the Main PCB Assembly.

• The cable is permanently attached to the LCD Panel

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-35

4-17 Replace Main PCB Assembly – ND69864, ND69865 Assembly Removal and Replacement

7. Undo the four (4) Phillips head screws holding the LCD Display in place and set the LCD aside.

1. LCD Backlight Cable, permanently attached to LCD. Connects to Backlight Power Inverter Assembly.

2. LCD Signal Cable, permanently attached to LCD. Connects to J4003 connector on Main PCB Assembly.

3. Phillips-head mounting screws (4 each) holding the LCD Assembly to the Main PCB Assembly.

Figure 4-16. LCD Cable, Mounting Screws, and Backlight Cable

Remove the GPS Receiver Module

8. If the GPS Receiver Module PCB Option 31 is not installed, or has already been removed, skip ahead to the next step. If it is installed and has not been removed, perform the substeps immediately below:

a. Undo the two screws holding the GPS Receiver Module in place.

b. Gentle pull the GPS Receiver Module straight up to disconnect its 14-pin header connector. The

header connector should stay with the GPS Receiver Module.

Prepare the Replacement Main PCB

9. Prepare the replacement Main PCB by installing the LCD Power Inverter PCB, the LCD Display, and if equipped, the GPS Receiver Module as described in the steps below.

10. Install the LCD Backlight Power Inverter PCB Assembly:

a. Fasten the Inverter in place with two (2) Phillips head screws.

b. Connect the Inverter cable to the J4005 Connector on the Main PCB.

c. When reattaching, the connector orientation is with the exposed pins toward the Main PCB

Assembly.

11. Install the LCD Panel Assembly:

a. Fasten the LCD assembly in place with four (4) pan head screws.

b. Connect the LCD Power cable to the LCD Power Inverter PCB

c. Connect the LCD Signal cable to the J4003 connector socket on the Main PCB.

12. Before installing the reassembled Main PCB Assembly, clean the Clear Plastic LCD Protection Plate by

using compressed air and LCD compatible wipes.

4-36 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-17 Replace Main PCB Assembly – ND69864, ND69865

13. The Main PCB Assembly is now ready to reassemble in the Case Front Assembly. Continue with the reassembly process in Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41 below.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-37

4-18 Replace LCD Backlight Inverter PCB Assembly – 3-61362 Assembly Removal and Replacement

4-18 Replace LCD Backlight Inverter PCB Assembly – 3-61362

This procedure assumes that the Main PCB Assembly has been removed from the instrument as described above and that the LCD Backlight Power Inverter PCB Assembly must be replaced. The replacement procedure is the same for MS2026B and MS2028B instruments.

Part Numbers

• 3-66549-3 – LCD Backlight Power Inverter PCB Assembly

• For either MS2026B or MS2028B instruments

Procedure

1. Open the instrument case and remove the Main PCB Assembly.

• See Section 4-16 – Remove Main PCB Assembly on page 4-30

2. Disconnect the two cables going to the LCD Backlight Power Inverter PCB Assembly.

• One cable is permanently attached to the LCD Display Assembly.

• The other cable goes to the Main PCB at J4005. Leave this cable attached to the Main PCB.

3. Undo the two (2) Phillips pan head screws and remove the LCD Backlight Inverter PCB Assembly.

• There are no header pins under the Inverter PCB.

1. LCD Backlight Cable, permanently attached to LCD. Connects to LCD Backlight Power Inverter Assembly.

2. J4005 connector on Power Inverter. Disconnect cable here going to Main PCB Assembly.

3. Phillips-head mounting screws (2 each) holding the LCD Power Inverter to Main PCB Assembly.

Figure 4-17. LCD Backlight Cables and Mounting Screws

4. Install the replacement LCD Backlight Power Inverter PCB Assembly by fastening it in place with two (2) Phillips-head screws.

5. Connect the cable from the Main PCB J4005 Connector to the Inverter J1 Connector.

6. Connect the cable from the LCD Display to the Inverter J2 Connector.

7. If there are no further replacement, install the Main PCB and reassemble the instrument by following

the procedure in Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41.

4-38 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-19 Replace LCD Display PCB Assembly – 3-15-118

4-19 Replace LCD Display PCB Assembly – 3-15-118

This procedure assumes that the Main PCB Assembly has been removed from the instrument as described above and that the LCD Display must be replaced. The replacement procedure is the same for MS2026B and MS2028B instruments.

Part Numbers

• 3-15-118 – LCD Display

• For either MS2026B or MS2028B instruments

Procedure

1. Open the instrument case and remove the Main PCB Assembly.

• See Section 4-16 – Remove Main PCB Assembly on page 4-30

2. Disconnect the two cables going to the LCD Display:

• The power cable is permanently attached to the LCD Display Assembly and goes to the J2

Connector on the LCD Backlight Power Inverter PCB Assembly.

• The signal cable is permanently attached to the LCD Display Assembly and goes to the J4003 Connector on the other side of the Main PCB.

3. Undo the four (4) Phillips pan head screws and remove the LCD Display Assembly.

4. Clean the replacement LCD Screen by using compressed air and LCD compatible wipes.

5. Install the replacement LCD Display Assembly by fastening it in place with four (4) Phillips head screws.

6. Connect the LCD Display power cable to the J2 Connector on the LCD Backlight Inverter Power PCB

Assembly.

Note

7. Connect the LCD Display signal cable to the J4003 Connector on the other side of the Main PCB.

8. If there are no further replacement, install the Main PCB and reassemble the instrument by following

the procedure in Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41.

Pay attention to the routing of the LCD Backlight and the LCD Signal Cables. The cables must be positioned so as not to be pinched when the assembly is reattached to the Case Front Assembly.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-39

4-20 Replace Clear Plastic LCD Protector – 3-61368 Assembly Removal and Replacement

4-20 Replace Clear Plastic LCD Protector – 3-61368

This procedure assumes that the Main PCB Assembly has been removed from the instrument as described above and that the Clear Plastic LCD Protector must be replaced. The replacement procedure is the same for MS2026B and MS2028B instruments.

Part Numbers

• 3-61368 – Clear Plastic LCD Protector

• For either MS2026B or MS2028B instruments

Procedure

1. Open the instrument case and remove the Main PCB Assembly.

• See Section 4-16 – Remove Main PCB Assembly on page 4-30

2. Remove the Clear Plastic LCD Protector by pushing it from the front.

3. The protector has an inset edge which goes into the hole and faces out. The protector “lip” is set towards

the inside of the case.

4. The outside of the Protector has a protective “skin” that should be left in place until the instrument is reassembled.

5. Clean the inside of the Protector by using compressed air and LCD compatible wipes.

6. Avoiding fingerprints, install the protector into the Case Front opening. The protector “lip” goes towards

the inside of the case.

7. If there are no further unit replacements, install the Main PCB and reassemble the instrument by following the procedure in Section 4-21 – Install Main PCB and Reassemble Instrument on page 4-41.

4-40 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-21 Install Main PCB and Reassemble Instrument

4-21 Install Main PCB and Reassemble Instrument

This procedure assumes that the required assemblies have been replaced and installed on the Main PCB Assembly.

Procedure

Install the Main PCB Components

1. If not already done, install the LCD Display PCB Assembly and the LCD Backlight Power Inverter PCB on the Main PCB with the following substeps:

a. Install the LCD Display on the Main PCB with four (4) pan head screws oriented so that the

multi-conductor signal cable matches up with its notch and connector and the three-conductor is towards the LCD Backlight Inverter PCB position.

b. Connect the LCD Display signal cable.

c. Install the LCD Backlight Power Inverter PCB Assembly in place with two (2) Phillips pan head

screws.

d. Connect the cable from the LCD Display to the LCD Backlight Power Inverter PCB Assembly.

Install the Clear Plastic LCD Protector

2. If not already done, clean the inner surface of the Protector with compressed air and LCD compatible wipes, leaving the outer protective film in place, and place the Protector into the Case Front, with the “lip” towards the inside of the case.

Install the Main PCB

3. Insert the connector edge of the Main PCB first into the case.

4. Fasten into place with eight (8) hex standoffs and two (2) pan head screws.

5. Connect the Battery Power cable and the Fan cable.

Install GPS Receiver Module

6. If the GPS Receiver Module is not equipped, skip ahead to Step 7. If it is equipped, install it on the Main PCB by performing the substeps immediately below:

a. Carefully position the replacement GPS Receiver Module so that it is lined up with its mounting

standoff holes and 14-pin header connector on the Main PCB.

b. Use extreme care so as to not bend any of the header pins.

c. Be careful to not offset the header pins by one row.

d. Make sure the header pins are loosely but correctly positioned before proceeding.

e. When perfectly aligned, press on either side of the header strip to mate the connectors and the

header pins.

f. Insert and tighten the two (2) Phillips mounting screws. Note that these screws are shorter than

the screws used to hold the VNA Module in place.

g. Snap the GPS Antenna Cable MCX connector into place on the GPS Receiver Module. Position the

Antenna Cable off the right side of the Case. Do not yet install the GPS Antenna SMA connector in the Connector Face Plate.

Install VNA Module

7. Place the VNA Module PCB upside down next to the left side of the Case and Main PCB.

• See Figure 4-11 on page 4-20 for a schematic view of placement and cable routing.

• See Figure 4-12 on page 4-21 for an orientation photograph of general placement and cable

routing.

8. Using needle-nose pliers, connect the three coaxial cables between the Main PCB and the VNA Module:

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-41

4-21 Install Main PCB and Reassemble Instrument Assembly Removal and Replace ment

• J2200 100 MHz In – Cable connected to the Ext Ref In BNC connector on the VNA Module.

• J2201 26 MHz Out – Cable connected to the bottom RF shield on the VNA Module.

• J3202 Trig In – Cable connected to the Ext Trig In BNC connector on the VNA Module.

Note the routing for each cable.

Note

On the Main PCB Assembly, note that the MCX connectors for J2202 100 MHz Out and J3203 140 MHz IF are not used.

9. “Fold” the VNA Module PCB back into position over the Main PCB and the eight (8) hex standoffs so it is loosely positioned.

10. Route the GPS Antenna Cable with SMA connector in the slot between the Connector Face Plate and the PCB, until the cable is correctly positioned in the PCB notch cutout.

11. Position the VNA Module as accurately as possible over the Main PCB Assembly observing the following:

a. The two connectors on the right side of the PCBs are loosely engaged.

b. The fan and other cables on the left side of the Case are clear of the hex standoffs.

c. The three coaxial cables between the two PCBs are on the OUTSIDE of the hex standoffs.

12. Once the connectors and the standoffs are correctly aligned, press the VNA Module connector into the

mating connector on the Main PCB.

4-42 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-21 Install Main PCB and Reassemble Instrument

Install GPS Antenna Connector

13. If the GPS Receiver Module Option 31 is not installed, skip ahead to Step 14. Otherwise, perform the substeps immediately below:

a. Route the GPS Antenna cable from the Main PCB so that it is located between the Face Plate and

the VNA Module and routed into its notch

b. Install the GPS Antenna SMA connector into the Face Plate, add the lock washer, and finally the

nut.

c. Use two 5/16” (≅ 8 mm) end wrenches to avoid torquing the connector and tighten the nut.

14. Make sure the Connector Face Plate is correctly positioned in its mounting grove and fasten the VNA

Module PCB into place using (8) Phillips head screws.

Install Power Monitor PCB Assembly

15. If the Power Monitor PCB Option 5 is not installed, skip ahead to Step 16. If the Power Monitor PCB is installed, perform the substeps immediately below:

a. Insert the Detector connector with the Flex Cable into the Detector hole on the Face Plate.

b. The Flex Cable must oriented above the Connector. Reinstall and tighten the two M3 x 0.5 Kep

Nuts using the 5.5 mm angled-head open end wrench.

c. Carefully position the Power Module Assembly over its mounting standoffs.

d. Use extreme care so as to not bend any of the header pins.

e. Be careful to not offset the header pins by one row.

f. Make sure the pins are loosely but correctly positioned before proceeding.

g. When perfectly aligned, press on either side of the header strip to mate the two connectors.

h. When the Power Monitor PCB is fully seated, inspect the header connectors from the side to make

sure all pins are correctly inserted and no pins are bent.

i. Install the three (3) Phillips head screws holding the Power Monitor PCB in place.

j. Gently fold over the Flex Cable and insert it into the four-connector socket on the PCB. See

Figure 4-9 on page 4-15 for locations.

Install Ext Trig Input BNC

16. Install the Ext Trig Input BNC connector and coaxial cable into the Face Place. Route the coaxial cable under the RF hardline and use the Tool T1451 socket to tighten the BNC Connector Dress Nut.

• The three coaxial cables should be on the outside of the hex standoffs.

17. Make sure all cables are clear of the case edges.

18. Install a cable tie over the two coaxial cables and the RF hardline to keep them in place.

Install Case Bottom Assembly

19. Replace the Case Bottom Assembly, making sure the Connector Face Plate is correctly centered in its mounting groove and that all cables are clear. Insert and tighten the four case mounting screws.

Install Main and SoftKey Keypads

20. Install the Main Keypad PCB and the Softkey Keypad Flex PCB into the front cover.

21. Carefully position the Main Keypad and insert the long header pin into the provided slot.

22. Gently press the Main Keypad into place so that the header pins mate with the connector on the Main

PCB.

• The header pins are located between SW19, SW3, SW15, and SW11.

23. Fit the Main Keypad Bezel over the Main Keypad so that it is under the Speaker. Make sure the Speaker

is correctly positioned to fit into the pins.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-43

4-21 Install Main PCB and Reassemble Instrument Assembly Removal and Replace ment

Install Battery and Battery Door

24. Fit the Reinstall the Battery.

25. Reinstall the Battery Door.

4-44 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-22 Replace Main Keypad Components – 3-61362, 65027-3

4-22 Replace Main Keypad Components – 3-61362, 65027-3

This procedure provides instructions for removing and replacing the Main Keypad Membrane and/or the underlying Main Keypad PCB. All keypad parts can be replaced without opening the MS202XB case.

Part Numbers

• 3-61362 – Main Keypad Membrane

• For either MS2026B or MS2028B instruments

• 65027-3 – Main Keypad PCB

• For either MS2026B or MS2028B instruments

Procedure

Note

1. Place the instrument face up on a protected work surface oriented with the Connector Strip away from you.

2. Remove the Battery Door and the Battery.

Remove Rotary Knob

3. Using the medium flat blade screwdriver, remove the Rotary Knob by sliding it under the know and levering it up gently.

Remove Main Keypad Bezel

4. There are eight (8) locking tabs holding the Main Keypad Bezel to the case as shown in the figure below.

Use a small piece of rubber or similar material to preven t scra tches to th e fr ont panel and the switch bezels.

1. Location of Main Keypad Switch Bezel four (4) left side locking tabs

2. Location of four (4) right side locking tabs.

Figure 4-18. Main Keypad Bezel Locking Tab Locations

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-45

4-22 Replace Main Keypad Components – 3-61362, 65027-3 Assembly Removal and Replacement

5. Using a small flat blade screwdriver and a piece of rubber as scratch protection, carefully pry the eight (8) Main Keypad Bezel locking tabs free of the main body of the case. The following tips help with the removal process:

• The flat blade screwdriver width must be less than 3.5 mm (0.13”) wide and as thin as possible.

• If available, recommended is a screwdriver made of fiberglass or other material that will not

scratch the bezel.

• As each locking-tab releases, the bezel comes up a bit.

• The basic technique is to position the protective piece of rubber (or similar material) next to the

slot for scratch protection, press the screwdriver straight in between the case and the bezel, and then gently lever the screwdriver AWAY from the bezel.

Protect Speaker and Remove Bezel

The Speaker sits on top of the Main Keypad PCB and is held in place by four locating pins on the

Caution

inside of the keypad bezel around the speaker opening. When the keypad bezel is removed, the speaker is held only by the fragile connecting wires. Use extreme care not to damage the speaker wires when removing or replacing the keypad membrane or PCB.

6. When the eight locking tabs are released, lift the bezel carefully up, disengage the speaker from its mounting pins (it stays attached to the underlying Main Keypad PCB) and set aside.

7. Protecting the Speaker wires, start at the bottom of the Main Keypad Membrane and lift it up.

8. Hold the edge of the Speaker with one hand and remove the Membrane from one side and then remove

the Membrane from the other side.

Replacement Options

9. At this point, your options are to replace the Main Keypad Membrane, remove and replace the Main Keypad PCB, or to do both. Each procedure is described below.

Remove Main Keypad Membrane

10. Again starting at the bottom, lay in the replacement Membrane starting at the top of the keypad area.

11. At the top, lift up the left edge of the Speaker and lay in the Membrane.

12. Again at the top, lift up the right edge of the Speaker and lay in the Membrane.

13. When complete, the Speaker should sit ON TOP of the Membrane.

14. Make sure the Soft Key Keypad ribbon cable is still securely connected.

15. If you are not replacing the Main Keypad PCB, skip ahead to Step #26 below and replace the Keypad

Bezel.

Remove Main Keypad PCB

16. At the bottom left corner of the Main Keypad PCB, remove the drop of silicon sealant holding the ZIF SMT Flip Door connector shut. The narrow ribbon cable in the connector is the Soft Key Keypad Flex PCB.

17. Lift the connector cover open, and gently lift out the Soft Key Keypad Flex PCB. The Flex PCB stays in the case, but must be protected and kept out of the way for the operations below.

Note Do not crimp, fold, or puncture the Soft Key Keypad Flex PCB.

18. Note that there is a 16-pin header connector between the Main Keypad PCB and the Main PCB inside the case. The header pin connector is located between the SW9, SW3, SW15, and SW11 switches.

19. Protecting the speaker and its connections on the PCB, gently pry up the PCB as the header pins disconnect from underlying the Main PCB Assembly.

4-46 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-22 Replace Main Keypad Components – 3-61362, 65027-3

20. Set the Main Keypad PCB aside and install the replacement PCB. The replacement unit should come with an installed 16-pin header connector. The longer pins on the header go into the PCB. The short pins will ultimately connect through the front cover mounting slot into the Main PCB Assembly. Inspect the header pins to make sure they are straight and evenly spaced.

• If the 16-pin header connector is not included with the replacement PCB, remove the existing 16-pin header from the old PCB and install it into the replacement unit. As above, the long pins go into the PCB and the short pins go through the case slot into the Main PCB.

21. Carefully position the replacement Main Keypad PCB on the case with the 16-pin header going into the case slot.

22. When the position is verified, and you are sure the header is correctly located, gently press the PCB into place, making full contact with the Main PCB Assembly.

23. Open the connector Flip Latch in the lower left corner of the PCB and insert the Soft Key Keypad Flex PCB into the connector. Push the connector Flip Latch down and add a drop of RTV (Room Temperature Vulcanizing silicon sealant to hold the door shut. Allow ample time for the sealant to set.

• Anritsu Part Number: 3-783-1102 ñ RTV Silicon Sealant

24. Either replace or reinstall the Main Keypad Membrane by following Step #11 to Step #14 above.

Install Main Keypad Bezel

25. Replace Main Keypad Bezel by first centering it on the key membrane and the Speaker.

26. Work your way around the bezel gradually positioning each Locking Tab into its slot. Take care not to

bend any Locking Tab.

27. When all are correctly inserted, go around again snapping each tab into place.

28. When complete, each button should protrude approximately 1.5 to 2 mm above the bezel.

Install Battery and Restart

29. Install the Battery and Battery Door. Restart the instrument.

30. Do a function check for each button on the Main Keypad and the Soft Key Keypad.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-47

4-23 Replace Soft Key Keypad Membrane – 3-61361 Assembly Removal and Replacement

4-23 Replace Soft Key Keypad Membrane – 3-61361

This procedure provides instructions for removing and replacing the Soft Key Keypad Membrane. All keypad parts can be replaced without opening the MS202XB case.

If the both the membrane and the underlying Soft Key Keypad Flex PCB must be replaced, the Main Keypad Bezel must also be removed using the procedure in the next section below:

• Section 4-24 – Replace Soft Key Keypad Components – 3-61361, 61333-3 on page 4-50

Part Numbers

• 3-61361 – Soft Key Keypad Membrane

• For either MS2026B or MS2028B instruments

Procedure

Note

1. Place the instrument face up on a protected work surface oriented with the Connector Strip away from you.

2. Remove the Battery Door and the Battery.

Remove Soft Key Keypad Bezel

3. There are six (6) locking tabs holding the Soft Key Keypad Bezel to the case as shown below in

Figure 4-19l

Caution

Use a small piece of rubber or similar material to prevent scratches to the front panel and the switch bezel.

Exercise extreme caution working around the LCD Display. Do not press in the middle of the display nor set any tools on it.

1. Location of three (3) upper locking tabs on the Soft Key Keypad Bezel (not shown) and the Keypad Membrane.

2. Location of three (3) lower locking tabs.

Figure 4-19. Locking Tab Locations for Soft Key Keypad Bezel

4-48 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-23 Replace Soft Key Keypad Membrane – 3-61361

4. Using a small flat blade screwdriver and a small piece of rubber or similar material, carefully pry the six (6) Soft Key Keypad Bezel locking tabs free from the case. The following tips help with the removal process:

• The flat blade screwdriver tip must be less than 3.5 mm (0.13”) wide and as thin as possible. If available, recommended is a screwdriver made of fiberglass or other material that will not scratch the bezel.

• As each locking-tab releases, the bezel comes up a bit.

• The basic technique is to move the protective piece of rubber (or similar material) next to the slot,

press the screwdriver straight in between the case and the bezel, and then gently lever the screwdriver AWAY from the bezel using the rubber as protection for the case finish.

5. When the six (6) locking tabs are released, lift the bezel up and set aside.

Replace Soft Key Keypad Membrane

6. Lift the Soft Key Keypad Membrane out of the case and set it aside, revealing the underlying Soft Key Keypad Flex PCB.

Caution

Exercise extreme caution working around the Soft Key Keypad ribbon cable. Do not touch it with a screw driver or other tool.

7. Insert the replacement Soft Key Keypad Membrane into the case slot, marking sure the center Membrane latch cutouts correctly match up with the latch slots.

Install Soft Key Keypad Bezel

8. Replace the Soft Key Keypad Bezel by first correctly positioning it over its mounting slot, making sure that the latches at the very end of the bezel are to the left.

9. Work your way around the bezel gradually positioning each Locking Tab into its slot. Take care not to bend any Locking Tab.

10. When all tabs are correctly inserted, go around again snapping each tab into place.

11. When complete, each membrane button should protrude approximately 1.5 to 2 mm above the bezel.

Install Battery and Battery Door

12. Install the Batter and Battery Door and restart the instrument.

13. Do a function check for each button on the Main Keypad.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-49

4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3 Assembly Removal and Replacement

4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3

This procedure provides instructions for removing and replacing both the Soft Key Keypad Membrane and the underlying Soft Key Keypad Flex PCB and assumes that the Main Keypad PCB will not be replaced. All keypad parts can be replaced without opening the MS202XB case. If only the Soft Key Keypad Membrane is to be replaced, use the prior procedure in the section above:

• Section 4-23 – Replace Soft Key Keypad Membrane – 3-61361 on page 4-48

Part Numbers

• 3-61361 – Soft Key Keypad Membrane

• For either MS2026B or MS2028B instruments

• 61333-3 – Soft Key Keypad Flex PCB

• For either MS2026B or MS2028B instruments

Procedure

Note

1. Place the instrument face up on a protected work surface oriented with the Connector Strip away from you.

2. Remove the Battery Door and the Battery.

Remove Rotary Knob

3. Remove the Rotary Knob by using a medium flat blade screwdriver and a small piece of gasket or rubber as antiscratch material.

4. Slide the screwdriver under the Knob, and gently lever it the Knob up and off of its shaft.

Use a small piece of rubber or similar material to prevent scratches to the front panel and the switch bezel.

4-50 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3

Remove Main Keypad Bezel

5. The Main Keypad Bezel and Membrane must be removed to access the connector on the Main Keypad PCB.

• The Main Keypad PCB does not need to be removed to service the Soft Key Keypad assembly.

6. There are eight (8) locking tabs holding the Main Keypad Bezel to the case as shown in Figure 4-20

1. Location of four (4) left side locking tabs on the Main Keypad Switch Bezel.

2. Location of four (4) right side locking tabs.

Figure 4-20. Locking Tab Locations for Main Keypad Bezel

7. Using a small flat blade screwdriver and a small piece of rubber or similar material, carefully pry the eight (8) Main Keypad Bezel locking tabs free of the main body of the case. The following tips help with the removal process:

• The flat blade screwdriver width must be less than 3.5 mm (0.13”) wide and as thin as possible. If available, recommended is a screwdriver made of fiberglass or other material that will not scratch the bezel.

• As each locking-tab releases, the bezel comes up a bit.

• The basic technique is to move the protective piece of rubber (or similar material) next to the slot,

press the screwdriver straight in between the case and the bezel, and then gently lever the screwdriver AWAY from the bezel using the rubber as protection for the case finish.

Protect Speaker Removing Bezel

8. When the eight locking tabs are released, lift the bezel carefully up, disengage the speaker from its mounting pins (it stays attached to the underlying Main Keypad PCB, and set aside.

The Speaker sits on top of the Main Keypad PCB and is held in place by four locating pins on the

Note

inside of the keypad bezel around the speaker opening. When the keypad bezel is removed, the speaker is held only by the fragile connecting wires. Use care not to damage the speaker wires when removing or replacing the keypad membrane or PCB.

9. Protecting the Speakers wires, start at the bottom of the Main Keypad Membrane and lift it up.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-51

4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3 Assembly Removal and Replacement

10. Hold the edge of the Speaker with one hand and remove the Membrane from one side and then remove the Membrane from the other side, exposing the Main Keypad PCB.

Remove Soft Key Keypad Bezel

Caution

Exercise extreme caution working around the LCD Display. Do not press in the middle of the display nor set any tools on it.

11. There are six (6) locking tabs holding the Soft Key Keypad Bezel to the case as shown below in

Figure 4-19l

1. Location of three (3) upper locking tabs on the Soft Key Keypad Bezel (not shown) and the Keypad Membrane.

2. Location of three (3) lower locking tabs.

Figure 4-21. Locking Tab Locations for Soft Key Keypad Bezel

12. Using a small flat blade screwdriver and a small piece of rubber or similar material, carefully pry the six (6) Softkey Keypad Bezel locking tabs free from the case. The following tips help with the removal process:

• As each locking-tab releases, the bezel comes up a bit.

• The basic technique is to move the protective piece of rubber (or similar material) next to the slot,

press the screwdriver straight in between the case and the bezel, and then gently lever the screwdriver AWAY from the bezel using the rubber as protection for the case finish.

13. When the six (6) locking tabs are released, lift the bezel up and set aside.

Remove Soft Key Keypad Membrane and Flex PCB

14. Lift the Soft Key Keypad Membrane out of the case and set it aside, revealing the underlying Soft Key Keypad Flex PCB.

Caution

Exercise extreme caution working around the Soft Key Keypad ribbon cable. Do not touch it with a screw driver or other tool.

4-52 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-24 Replace Soft Key Keypad Components – 3-61361, 61333-3

15. The Soft Key Keypad Flex PCB is connected to the Main Keypad PCB by a ZIF (Zero Insertion Force) “Flip Lock” SMF connector on the Main Keypad PCB.

16. The Connector Flip Lock is help in place with a drop of silicon sealant.

17. Using a plastic or similar scraper, scrape scrap the sealant off the connector, and gently pry to the

connector latch up, freeing the Soft Key Keypad Flex PCB.

18. Remove and set aside the old Soft Key Keypad Flex PCB.

Caution The two keypad PCBs are fragile. Handle them with great care.

Replace Soft Key Keypad Components

19. Insert the replacement Soft Key Keypad Flex PCB into its slot.

20. Gently feed the right end of the Soft Key Flex PCB into the open Flip Lock connector and when positioned

correctly, snap the Lock into position.

21. Apply a drop of silicon sealant to the Flip Lock and the underlying Soft Key Keypad Flex PCB. The sealant drop should not protrude more than 2 mm above the top of the connector.

22. Allow ample time for the sealant to set before proceeding.

23. Insert the replacement Soft Key Keypad Membrane into the case slot, marking sure the center

Membrane latch cutouts correctly match up with the case latch slots as shown in Figure 4-13 on

page 4-30 above.

• Note that the membrane can only go in one way with the center slots offset to the right.

24. Replace the Soft Key Keypad Bezel making sure that it has the correct orientation.

• The bezel end with two latches goes towards the left side of the instrument.

• The bezel end with two inset latches goes toward the right side of the instrument.

25. Work your way around the bezel gradually getting each Locking Tab into its slot. Take care not to bend

any locking tab.

26. When all are correctly inserted, go around again snapping each tab into place.

27. When complete, each Soft Key button should protrude approximately 1.5 to 2 mm above the bezel.

Install Main Keypad Membrane and Bezel

28. Starting at the bottom of the Main Keypad, lay in the Main Keypad Membrane working towards the top.

29. At the top, lift up the left edge of the Speaker and lay in the Membrane.

30. Again at the top, lift up the right edge of the Speaker and lay in the Membrane.

31. When complete, the Speaker should sit ON TOP of the Membrane.

32. Make sure the Soft Key Keypad ribbon cable is still securely connected.

33. Replace Main Keypad Bezel by first centering it on the keys and the Speaker.

34. Work your way around the bezel gradually positioning each Locking Tab into its slot. Take care not to

bend any Locking Tab.

35. When all are correctly inserted, go around again snapping each tab into place.

36. When complete, each button should protrude approximately 1.5 to 2 mm above the bezel.

Install Rotary Knob

37. Turn the instrument and install the Rotary Knob. There is no specific orientation for the Knob.

Install Battery and Battery Door

38. Install the Batter and Battery Door and restart the instrument.

39. Do a function check for each button on the Main Keypad and the Soft Key Keypad.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-53

4-25 Replace Hand Strap Handle – 3-61470 Assembly Removal and Replacement

4-25 Replace Hand Strap Handle – 3-61470

This procedure provides instructions for replacing the right side Hand Strap using existing hardware. The case does not need to be opened for this procedure.

Part Numbers

• 3-61470 – Hand Strap

Procedure

1. Place the instrument face up on a protected work surface orientated with the Connector Strip toward the right.

2. Using the flat blade screwdriver, remove the two M3 Slotted Screws holding the two Plastic Ring Holders to the case.

3. Orient the strap so that the word “Anritsu” reads correctly.

4. Capture one Handle End Ring with the Ring Holder and screw into place.

5. Making sure the strap is not twisted, capture the remaining ring with the Ring Holder. and screw into

place.

4-54 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Assembly Removal and Replacement 4-26 Replace Rotary Knob – 3-61360-2

4-26 Replace Rotary Knob – 3-61360-2

This procedure covers removing and replacing the Rotary Knob. The case does not need to be opened for this procedure. Note that this part does not include the Rotary Encoder. To replace the Rotary Encoder, see:

• Section 4-15 – Replace Rotary Encoder – 3-410-101 on page 4-27

Part Numbers

• 3-61360-2 – Rotary Knob

• For either MS2026B or MS2028B instruments

• Does not include the 3-410-101 – Rotary Encoder

Procedure

1. Use a medium flat blade screwdriver and a small protective piece of rubber to remove the Rotary Knob.

2. Position the rubber piece next to the Knob, and slide in the screwdriver between the Knob and the Case.

3. Gentle lever the Knob up and off of its mounting shaft.

4. Position the replacement Knob over the shaft and press into place. There is no required orientation of the

Knob.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 4-55

4-26 Replace Rotary Knob – 3-61360-2 Assembly Removal and Replacement

4-56 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Chapter 5 — Troubleshooting

5-1 Introduction

This chapter describes the primary troubleshooting operations that can be performed. Perform the troubleshooting suggestions in the order in which they are listed.

Only qualified service personnel should replace internal assemblies. Major sub-assemblies that are shown in the replaceable parts list are typically the items that may be replaced.

Because they are highly fragile, items that must be soldered may not be replaced without special training. Removal of RF shields from PC boards or adjustment of screws on or near the RF shields will detune sensitive RF circuits and will result in degraded instrument performance.

5-2 Turn-on Problems

Unit Cannot Boot Up

Unit cannot boot-up, no activity occurs when the On/Off key is pressed:

1. Battery may have been fully discharged. Use an external charger (Anritsu PN 2000-1374) to charge a completely discharged battery.

2. Battery may be the wrong type. Use only Anritsu approved battery packs. Some non-approved battery packs will fit into the MS202XB but they are electrically incompatible and will not charge correctly.

3. External AC to DC power adapter may have failed or be the wrong type. Replace the external power adapter.

4. On/Off switch may have damaged. Replace the rubber keypad membrane.

5. Main PCB may have failed. Replace the Main PCB Assembly.

Unit Cannot Complete Boot-Up

Unit begins the boot process, but does not complete boot-up:

1. Firmware update may not have completed. Reload firmware using Master Software Tools.

2. Main PCB may have failed. Replace the Main PCB Assembly.

Unit Boots with No Display

Unit produces a ding sound after a while, but with no display:

1. If the display is dim, check the Brightness setting under the System Menu | System Options.

2. LCD Backlight Inverter PCB may have failed. Replace LCD Backlight Inverter PCB.

3. LCD may have failed. Replace the LCD Display Assembly.

4. The Main PCB may have failed. Replace the Main PCB Assembly.

Boot-up Self Test Fails

The unit boot-up self test fails with an error message:

1. Perform a Master Reset (Press Esc and On/Off key to power on the unit after power off the unit).

2. The Main PCB may have failed. Replace the Main PCB Assembly.

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A 5-1

5-3 Operating Problems Troubleshooting

5-3 Operating Problems

IF Out of Range Message

1. VNA Module may have damaged. Replace VNA Module.

Lock Error Message

1. VNA Module may have damaged. Replace VNA Module.

2. Main PCB may have failed. Replace Main PCB Assembly.

Option 5, Power Monitor Problems

1. Verify correct operation of RF detector.

2. Power Monitor PCB Assembly Option 5 PCB may have failed. Replace Option 5 PCB.

5-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Appendix A — Test Records

A-1 Introduction

This appendix provides test records that can be used to record the performance of the MS2026B and MS2028B VNA Masters. Make a copy of the following Test Record pages and document the measured values each time performance verification is performed. Continuing to document this process each performance verification session provides a detailed history of the instrument‘s performance.

The following test record forms are available:

• “MS2026B VNA Master Test Record” on page A-2

• “Instrument Information” on page A-2

• “VNA Frequency Accuracy” on page A-2

• “S-Parameter Measurements Verification” on page A-2

• “Transmission Dynamic Range” on page A-2

• “Power Measurement (For instruments with Option 5 Power Monitor)” on page A-3

• “MS2028B VNA Master Test Record” on page A-4

• “Instrument Information” on page A-4

• “VNA Frequency Accuracy” on page A-4

• “S-Parameter Measurements Verification” on page A-4

• “Transmission Dynamic Range” on page A-4

• “Power Measurement - Instruments with Option 5 Power Monitor” on page A-5

MS2026B/MS2028B VNA MM PN: 10580-00222 Rev. A A-1

A-2 MS2026B VNA Master Test Record Test Records

A-2 MS2026B VNA Master Test Record

Instrument Information

Serial Number: Firmware Revision: Operator:

Options: Date:

VNA Frequency Accuracy

Table A-1. Spectrum Analyzer (SA) - Frequency Accuracy

VNA Output Frequency Specification Frequency Counter Reading

2.6 GHz ±3.9 kHz kHz

S-Parameter Measurements Verification

_____ Attached Verification Report

Transmission Dynamic Range

Table A-2. Transmission Dynamic Range

Measured Value

Frequency Range Specification

5 kHz to 3 GHz 80 dB dB dB

3 GHz to 6 GHz 75 dB dB dB

(S21)

Measured Value

(S12)

A-2 PN: 10580-00222 Rev. A MS2026B/MS2028B VNA MM

Anritsu MS2028B Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

VNA Master MS2026B and MS2028B Vector Network Analyzers

Table of Contents

List of Figures and Tables

1-2 Description

Key Features

Frequency Ranges

Standard Accessories

1-3 Related Documents

1-4 Options

1-5 Recommended Test Equipment General Information

General Information 1-6 Recommended Tools and Supplies

General Information 1-7 Replaceable Parts and Assemblies

2-2 Frequency Accuracy

Equipment Required

Procedure

2-3 Transmission Dynamic Range Performance Verification

Equipment Required

Procedure

Performance Verification 2-4 S-Parameter Measurements Verification

Equipment Required

Special Precautions

Procedure

If Verification Fails

Performance Verification 2-5 Power Monitor (Option 5) Verification

Equipment Required

Procedure

2-6 Bias Tee (Option 10) Operational Check Performance Verification

Equipment Required

Procedure

Voltage and Current Test

Fault Test

2-7 GPS (Option 31) Operational Check Performance Verification

Equipment Required

Procedure

3-2 Replaceable Parts and Assemblies

3-3 Battery Information

Approved Batteries Only

Recharging

Analyzer Not In Use

Physical Handling of Batteries

Battery Disposal

Battery Information and Replacement 3-4 Battery Pack Removal and Replacement

4-2 Electrostatic Discharge Prevention

4-3 Real Time Clock (RTC) Battery

4-4 Replaceable Parts, Assemblies, and Accessories

4-5 Front Panel Components for VNA Master MS202XB Assembly Removal and Replacement

Assembly Removal and Replacement 4-6 Main Keypad Bezel for VNA Master MS202XB

4-7 Softkey Keypad Bezel for VNA Master MS202XB Assembly Removal and Replacement

Assembly Removal and Replacement 4-8 Internal Anatomy of the VNA Master MS2026B

MS2026B View from Top Connector Strip

MS2026B View from Bottom

Assembly Removal and Replacement 4-9 Internal Anatomy of the VNA Master MS2028B

MS2028B View from Top Connector Strip

MS2028B View from Bottom

Assembly Removal and Replacement 4-10 Disassembly Sequence Overview

4-11 Open the Instrument Case Assembly Removal and Replacement

Procedure

Part Number

Procedure

Part Numbers

Procedure

Part Numbers

Procedure

Part Numbers

Procedure

4-16 Remove Main PCB Assembly Assembly Removal and Replacement

Procedure

Part Numbers

Procedure

Part Numbers

Procedure

Part Numbers

Procedure

Part Numbers

Procedure

Assembly Removal and Replacement 4-21 Install Main PCB and Reassemble Instrument