Agilent Technologies FieldFox MW N9913A User manual

Agilent Technologies
FieldFox MW VNA/SA
Service Guide
This manual provides documentation for the following instruments:
FieldFox MW Analyzers - N9913A, N9914A, N9915A, N9916A, N9917A, N9918A
FieldFox MW VNA - N9925A, N9926A, N9927A, N9928A
FieldFox MW SA - N9935A, N9936A, N9937A, N9938A
Manufacturing Part Number: Part Number N9927-90003
Printed in USA
July 2014
 Agilent Technologies, Inc. 2013 - 2014

Title-2 N9927-90003
Fieldfox Analyzer
Warranty Statement
THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED “AS IS,” AND IS
SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER,
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, AGILENT DISCLAIMS ALL
WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND
ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. AGILENT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL
OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN.
SHOULD AGILENT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH
WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT
WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL
CONTROL.
DFARS/Restricted Rights Notice
If software is for use in the performance of a U.S. Government prime contract or subcontract, Software is
delivered and licensed as “Commercial computer software” as defined in DFAR 252.227-7014 (June
1995), or as a “commercial item” as defined in FAR 2.101(a) or as “Restricted computer software” as
defined in FAR 52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use,
duplication or disclosure of Software is subject to Agilent Technologies’ standard commercial license
terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than
Restricted Rights as defined in FAR 52.227-19(c)(1-2) (June 1987). U.S. Government users will receive
no greater than Limited Rights as defined in FAR 52.227-14 (June 1987) or DFAR 252.227-7015 (b)(2)
(November 1995), as applicable in any technical data.
Certification
Agilent Technologies, Inc. certifies that this product met its published specifications at the time of
shipment from the factory. Agilent Technologies, Inc. further certifies that its calibration measurements
are traceable to the United States National Institute of Standards and Technology, to the extent allowed
by the Institute's calibration facility, and to the calibration facilities of other International Standards
Organization members.

N9927-90003 Title-3
Fieldfox Analyzer
Assistance
Product maintenance agreements and other customer assistance agreements are available for Agilent
Technologies, Inc. products. For information about these agreements and for other assistance, contact
Agilent. Refer to “Contacting Agilent” on page 2-9.
Safety and Regulatory Information
The safety and regulatory information pertaining to this product is located in Chapter 1 , “Safety and
Regulatory Information.”
Safety Notes
The following safety notes are used throughout this manual. Familiarize yourself with each of the notes
and its meaning before operating this instrument. All pertinent safety notes for using this product are
located in Chapter 1 , “Safety and Regulatory Information.”
WARNING Warning denotes a hazard. It calls attention to a procedure which, if not correctly
performed or adhered to, could result in injury or loss of life. Do not proceed beyond
a warning note until the indicated conditions are fully understood and met.
CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed
or adhered to, could result in damage to or destruction of the instrument. Do not proceed
beyond a caution sign until the indicated conditions are fully understood and met.
Documentation Map
This Service Guide is available only on the Web via an Internet connection. It
contains information for testing, adjusting, troubleshooting, and repairing your
FieldFox analyzer.

Title-4 N9927-90003
Fieldfox Analyzer
The User’s Guide, included with the product, helps you to quickly familiarize yourself with the
analyzer. Procedures are provided for preparing, configuring, and making measurements with the
analyzer.
The Quick Reference Guide, included with the product, is an abbreviated form of the User’s Guide
containing some of the most commonly referred to information. The pages of the Quick Reference
Guide are laminated with clear plastic to resist damage when used outdoors.
Printing Copies of Documentation from the Web
To print copies of documentation from the Web, download the PDF file from the Agilent web site:
•Gotowww.agilent.com.
• Enter the document’s part number (located on the title page) in the Search box.
• Click Search.

Contents
Service Guide?N9927-90003 Contents-1
1 Safety and Regulatory Information
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Electrostatic Discharge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Regulatory Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
2 General Product Information
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Physical Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Electrical Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Analyzer Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Analyzer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Option Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Agilent Support, Services, and Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Service and Support Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Calibration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Contacting Agilent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Shipping Your Analyzer to Agilent for Service or Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
3 Tests and Adjustments
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Protect Against Electrostatic Discharge (ESD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Allow the Analyzer to Warm Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Review the Principles of Connector Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Service Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Before Returning an Instrument to a Customer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Performance Tests (Agilent N7841A Software Package). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Performance Verification Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Adjustments (Agilent N7841A Software Package) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
4 Troubleshooting
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Protect Against Electrostatic Discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Getting Started with Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Check the Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Contents-2 Service Guide?N9927-90003
Contents
Troubleshooting Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Power Up Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Front Panel Group Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Checking Display Brightness and Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Checking the Front Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
USB and SD Card Slot Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Measurement Group Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
Problems in NA Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
Problems in SA Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
5 Theory of Operation
Information in This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Analyzer System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Functional Groups of the Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Front Panel Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
A3 Front Panel Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-5
A2 LCD Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Measurement Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
A4 RF Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
A5 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-13
A6 SOM Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
A7 Real Time Clock Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
Main Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
Grounding and Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-18
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-18
Voltages and Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-18
Power Control and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-19
Battery Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-20
Operation in Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-22
CAT, NA, and VVM Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-24
SA and CPM Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-24
Power Meter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-25
Temperature Related Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-25
User Calibration in CAT, NA, and VVM Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-26
Factory Calibration (CalReady) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-26
QuickCal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-26
Mechanical Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-27
Firmware Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-28
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-28
User Accessible Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-28
Operational Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-28
Erase User Data Utility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-28
Error Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-29
Firmware Upgrades. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-29
LAN Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-30
6 Replaceable Parts
Information in This Chapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2

Contents
Service Guide?N9927-90003 Contents-3
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Assembly Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Replaceable Parts Listings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Entire Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Front Panel Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Measurement Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Case Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Miscellaneous Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
7 Repair and Replacement Procedures
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Personal Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Electrostatic Discharge (ESD) Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Removal and Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Removing and Replacing the Main Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Removing and Replacing the Case Group Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Removing and Replacing the Front Panel Group Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21
Removing and Replacing the Measurement Group Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27
Post-Repair Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-44
Manual Checks and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-45
8 General Purpose Maintenance and Service Procedures
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Service Related User Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
To View Currently Installed Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
To View the Current Firmware Revision, Etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
To View the Error Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
To View Temperature Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Erase User Data Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
To View Currently Installed Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Re-Installing Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Firmware Upgrades. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
To Check the Current Firmware Revision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Miscellaneous Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Cleaning the Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Battery Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Appendix A
FieldFox S-parameter Measurement Uncertainty, for System Verification . . . . . . . . . . . . . . . . . . . . . . . . A-2
Corrected measurement uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Corrected measurement uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Contents-4 Service Guide?N9927-90003
Contents

N9927-90003 1-1
1Safety and Regulatory Information

1-2 N9927-90003
Safety and Regulatory Information FieldFox Analyzer
Information in This Chapter
Information in This Chapter
This chapter provides safety information that will help protect you and your network analyzer. It also
contains information that is required by various government regulatory agencies.
Section Title Summary of Content Start Page
Safety Symbols Descriptions of CAUTION and WARNING
symbols used throughout this manual. Page 1-3
General Safety Considerations A list of safety points to consider when servicing
your network analyzer. Page 1-3
Electrostatic Discharge Protection A discussion of electrostatic discharge (ESD) and related recommendations and requirements for ESD
protection. Page 1-5
Regulatory Information
Definitions of instrument markings.
Instructions for disposing of the analyzer’s lithium
battery.
Page 1-6

N9927-90003
1-3
FieldFox Analyzer Safety and Regulatory Information
Safety Symbols
Safety Symbols
The following safety symbols are used throughout this manual. Familiarize yourself with each of the
symbols and its meaning before operating this instrument.
CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed
or adhered to, could result in damage to or destruction of the instrument. Do not proceed
beyond a caution note until the indicated conditions are fully understood and met.
WARNING Warning denotes a hazard. It calls attention to a procedure which, if not correctly
performed or adhered to, could result in injury or loss of life. Do not proceed beyond
a warning note until the indicated conditions are fully understood and met.
General Safety Considerations
Safety Earth Ground
WARNING This is a Safety Class I product (provided with a protective earthing ground
incorporated in the power cord). The mains plug shall only be inserted in a socket
outlet provided with a protective earth contact. Any interruption of the protective
conductor, inside or outside of the instrument, will make the instrument dangerous.
Intentional interruption is prohibited.
CAUTION Always use the three-prong AC power cord supplied with this product. Failure to ensure
adequate grounding by not using this cord may cause product damage.

1-4 N9927-90003
Safety and Regulatory Information FieldFox Analyzer
General Safety Considerations
Before Applying Power
WARNING If this product is not used as specified, the protection provided by the equipment
could be impaired. This product must be used in a normal condition (in which all
means for protection are intact) only.
CAUTION This product is designed for use in Installation Category II and Pollution Degree 2 per
IEC 61010-1:2001 and 664 respectively.
CAUTION The measuring terminals on this instrument are designed to be used with external signals
described in Measurement Category I, but NOT with external signals described in
Categories II, III, and IV. The input of this instrument cannot be connected to the mains.
Servicing
WARNING These servicing instructions are for use by qualified personnel only. To avoid
electrical shock, do not perform any servicing unless you are qualified to do so.
WARNING Danger of explosion if battery is incorrectly replaced. Replace only with the same or
equivalent type recommended. Discard used batteries according to local ordinances
and/or manufacturer’s instructions.
WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To
prevent electrical shock, do not remove covers.
WARNING For continued protection against fire hazard, replace line fuse only with same type
and rating. The use of other fuses or material is prohibited.
WARNING The detachable power cord is the instrument disconnecting device. It disconnects
the mains circuits from the mains supply before other parts of the instrument. The
front panel switch is only a standby switch and is not a LINE switch (disconnecting
device).

N9927-90003
1-5
FieldFox Analyzer Safety and Regulatory Information
Electrostatic Discharge Protection
Electrostatic Discharge Protection
Protection against electrostatic discharge (ESD) is essential while removing assemblies from or
connecting cables to the network analyzer. Static electricity can build up on your body and can easily
damage sensitive internal circuit elements when discharged. Static discharges too small to be felt can
cause permanent damage. To prevent damage to the instrument:
•always have a grounded, conductive table mat in front of your test equipment.
•always wear a grounded wrist strap, connected to a grounded conductive table mat, having a 1 MΩ
resistor in series with it, when handling components and assemblies or when making connections.
•always wear a heel strap when working in an area with a conductive floor. If you are uncertain about
the conductivity of your floor, wear a heel strap.
•always ground yourself before you clean, inspect, or make a connection to a static-sensitive device or
test port. You can, for example, grasp the grounded outer shell of the test port or cable connector
briefly.
•always ground the center conductor of a test cable before making a connection to the analyzer test
port or other static-sensitive device. This can be done as follows:
1. Connect a short (from your calibration kit) to one end of the cable to short the center conductor to
the outer conductor.
2. While wearing a grounded wrist strap, grasp the outer shell of the cable connector.
3. Connect the other end of the cable to the test port and remove the short from the cable.
Figure 1-1 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to “ESD
Supplies” on page 6-14 for part numbers.
Figure 1-1 ESD Protection Setup

1-6 N9927-90003
Safety and Regulatory Information FieldFox Analyzer
Regulatory Information
Regulatory Information
This section contains information that is required by various government regulatory agencies.
Instrument Markings
The instruction documentation symbol. The product is marked with this symbol
when it is necessary for the user to refer to the instructions in the documentation.
The CE mark is a registered trademark of the European Community. (If
accompanied by a year, it is when the design was proven.)
The CSA mark is a registered trademark of the Canadian Standards Association.
This is a marking to indicate product compliance with the Canadian
Interference-Causing Equipment Standard (ICES-001).
This is a symbol of an Industrial Scientific and Medical Group 1 Class A
product.
This is a required mark signifying compliance with an EMC requirement. The
C-Tick mark is a registered trademark of the Australian Spectrum Management
Agency.
This product complies with the WEEE Directive (2002/96/EC) marking requirements.
The affixed label indicates that you must not discard this electrical/ electronic product in
domestic household waste.
Product Category: With reference to the equipment types in the WEEE Directive Annex
I, this product is classed as a “Monitoring and Control instrumentation” product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Agilent office, or see
http://www.agilent.com/environment/product/ for more information.
ICES/NMB-001

N9927-90003
1-7
FieldFox Analyzer Safety and Regulatory Information
Regulatory Information
Battery Disposal
If the either the primary power battery, or the RTC (real time clock) battery (on the A3 front panel
interface board) needs to be disposed of, dispose of it in accordance with your country’s requirements. If
required, you may return the battery to Agilent Technologies for disposal. Refer to “Contacting Agilent”
on page 2-9 for assistance.
For instructions on removing and replacing the primary power battery, refer to “Removing and
Replacing the Main Battery” on page 7-6.
For instructions on removing and replacing the RTC (real time clock) battery located on the A3 front
panel interface board, refer to “Replacing the A3 Front Panel Interface Board (FPIB)” on page 7-25.

1-8 N9927-90003
Safety and Regulatory Information FieldFox Analyzer
Regulatory Information

N9927-90003 2-1
2General Product Information

2-2 N9927-90003
General Product Information FieldFox Analyzer
Information in This Chapter
Information in This Chapter
Maintenance
WARNING To prevent electrical shock, disconnect the analyzer from the mains source before
cleaning. Use a dry cloth or one slightly dampened with water to clean the external
case parts. Do not attempt to clean internally.
Physical Maintenance
Clean the analyzer case using a dry or slightly damp cloth only.
Electrical Maintenance
Refer to “Contacting Agilent” on page 2-9 and to Chapter 3 , “Tests and Adjustments.”
Section Title Summary of Content Start Page
Maintenance
Cleaning instructions for the external surfaces of
your analyzer.
Information about electrical maintenance of your
analyzer.
Page 2-2
Analyzer Models A list of the models available for the microwave
network analyzers. Page 2-3
Analyzer Options A list of the options available for the microwave
network analyzers. Page 2-4
Agilent Support, Services, and
Assistance
The Internet address (URL) for Agilent assistance.
Service and support options available.
Calibration options available.
Important information about shipping your
analyzer to Agilent for service or repair.
Page 2-8

N9927-90003 2-3
FieldFox Analyzer General Product Information
Analyzer Models
Analyzer Models
Max Freq (GHz) N991x Combo N992x VNA N993x SA
4 N9913A X X
6.5 N9914A X X
9 N9915A N9925A N9935A
14 N9916A N9926A N9936A
18 N9917A N9927A N9937A
26.5 N9918A N9928A N9938A

2-4 N9927-90003
General Product Information FieldFox Analyzer
Analyzer Options
Analyzer Options
Below is a list of options that effect hardware for the FieldFox at the time of initial product release.
Additional options will be added as product features are enhanced. Go to
www.agilent.com/find/fieldfox2 for information on currently available upgrade options.
Table 2-1. Options
Option Description N991x Combo N992x VNA N993x SA
010 VNA Time Domain Available Available −
030 Remote Control Capability Available Available Available
100 3.5 mm APC Connectors -- -- N9938A
112 QuickCal Available Available −
210 VNA Transmission/Reflection Available Base Model −
211 VNA Full 2-Port S-Parameters Available Available −
220 Tracking Generator See 210 −Available
233 Spectrum Analyzer Available −Base Model
235 Preamplifier Available −Available
236 Interference Analyzer and Spectrogram Available −Available
238 Spectrum Analyzer Time Gating Available −Available
302 USB Power Sensor Support Available Available Available
305 Cable and Antenna Analyzer Included in
Base Available −
307 GPS Receiver Available Available Available
308 Vector Voltmeter Available Available −
309 DC Bias Variable-Voltage Source Available Available Available
310 Built-In Power Meter Available Available Available
320 Reflection Measurements (RL, VSWR) Included in
Base
−Available