Agilent 87075C Users Guide

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User’s and Service Guide

Agilent Technologies

87050E and 87075C

Multiport Test Sets

For 871x Network Analyzers

Part No. 87050-90026

Printed in USA

Print Date: March 2004

Supersedes: June 2000

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 P ARTICULAR 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 INFORMA TION 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.

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

page 35.

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

iii

Chapter 10.

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.

Printing Copies of This Document

To print copies of documentation from the Web, download the PDF file from the Agilent web site:

• Go to http://www.agilent.com.

• Enter the document’s part number (located on the title page) in

the Quick Search box.

• Click GO.

Contents

1. Introduction and Installation

Introduction to the Multiport Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

A Complete Multiport Test System . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Fully Characterize Your Devices with a Single Connection. . . . . . . . 1-2

Improve Your Competitiveness with a Fully Specified Test System . 1-3 Eliminate Redundant Connection of Calibration Standards with Test

Set Cal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Reduce the Effects of Test-System Drift with SelfCal . . . . . . . . . . . . 1-4

Decrease Calibration Times and Increase Production Throughput . 1-4

Improve Measurement Accuracy with Two-Port Calibration . . . . . . 1-4

Key Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

If You Are Using an 8711C/12C/13C/14C Analyzer . . . . . . . . . . . . . . . . 1-6

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Step 1. Check the Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Step 2. Determine Network Analyzer Compatibility . . . . . . . . . . . . 1-12

Step 3. Connect the Test Set to the Analyzer . . . . . . . . . . . . . . . . . 1-14

Step 4. Satisfy Electrical and Environmental Requirements . . . . . 1-16

Step 5. Activate the Test Set and Check the System Operation . . . 1-19

Step 6. Connect Peripheral Devices. . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Cleaning the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

2. Getting Started

Brief Tour of System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Port Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Test Set Cal and SelfCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Transmission Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Reflection Measurements Using a 1-Port Cal. . . . . . . . . . . . . . . . . . 2-12

Contents-v

Contents

Reflection Measurements Using a 2-Port Cal (8712ES/14ES Only) 2-14

Performing the Operator's Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

If the Multiport Test Set Fails the Operator's Check . . . . . . . . . . . . 2-21

Cable and Test Fixture Considerations. . . . . . . . . . . . . . . . . . . . . . . . . 2-22

3. Measurement Examples

Example: Measuring a 50 Ohm Duplexer. . . . . . . . . . . . . . . . . . . . . . . .3-3

Calibrating the Multiport System for Measuring a 50 Ohm

Duplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Measuring Insertion Loss: ANT Port to Rx Port. . . . . . . . . . . . . . . . . 3-8

Measuring Insertion Loss: Tx Port to ANT Port . . . . . . . . . . . . . . . . 3-10

Measuring Isolation: Rx Port to Tx Port . . . . . . . . . . . . . . . . . . . . . .3-12

Measuring Return Loss: ANT Port . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Measuring Return Loss: Rx Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Measuring Return Loss: Tx Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Example: Measuring a 75 Ohm Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Calibrating the Multiport System for Measuring a 75 Ohm Tap. . . 3-26

Measuring Insertion Loss: In Port to Out Port . . . . . . . . . . . . . . . . .3-28

Measuring Reverse Isolation:

Out Port to In Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

Measuring Insertion Loss: In Port to Tap1 . . . . . . . . . . . . . . . . . . . . 3-32

Measuring Isolation: Tap3 to Tap4 . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34

Measuring Return Loss: In Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Measuring Return Loss: Out Port . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38

Using Two Measurement Channels Simultaneously . . . . . . . . . . . . .3-41

Using the Same Test Set Port Assignments for Both Measurement

Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-41

Using Different Test Set Port Assignments for Both Measurement

Contents-vi

Contents

Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45

4. Test Set Cal and SelfCal

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Test Set Cal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

SelfCal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Test Set Cal: An Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Setting Up the Measurement Parameters . . . . . . . . . . . . . . . . . . . . . 4-5

Determining the Best Position for the Calibration Reference Plane. 4-8

Determining the Type of Calibration Kit to Use . . . . . . . . . . . . . . . . 4-9

Determine the Number of Test Set Ports to Be Used. . . . . . . . . . . . 4-11

Performing the Test Set Cal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Saving the Test Set Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Recalling the Test Set Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

Setting the SelfCal Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19

Selecting the SelfCal Method

(For 8712ES/14ES Analyzers Only). . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

Test Set Cal Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

Test Set Cal Example #1: The DUT Has Insertable Port Pairs . . . . 4-22

Test Set Cal Example #2: The DUT Has Noninsertable Port Pairs with

Identical Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

Test Set Cal Example #3: The DUT Has a Noninsertable Port Pair with

Dissimilar Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43

Test Set Cal and SelfCal: Theory of Operation . . . . . . . . . . . . . . . . . . 4-56

SelfCal Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59

Calibrated-Port Switching Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-65

Factory Test Set Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67

Using Multiple Test Set Cals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68

Verifying the Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-70

Method #1: Calibration Check

Contents-vii

Contents

(8712ET/14ET only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-71

Method #2: Measure an Alternate Set of Calibration Standards. . .4-72

Method #3: Measure a “Golden DUT” . . . . . . . . . . . . . . . . . . . . . . . . 4-74

Using Calibration Verification to Determine Calibration Intervals 4-74

If the Calibration Verification Data Is Bad . . . . . . . . . . . . . . . . . . . . 4-76

Calibration Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-78

Selecting a Calibration Kit Stored in the Analyzer . . . . . . . . . . . . . 4-78

Creating a User-Defined Calibration Kit . . . . . . . . . . . . . . . . . . . . . 4-80

5. Automating Measurements

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Multiport Test Set SCPI Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Usage of *OPC? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

6. Front/Rear Panel

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Line Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3

Test Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

The REFLECTION Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5

The TRANSMISSION Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

The Chassis Ground Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

The PORT CONNECTION Status LEDs . . . . . . . . . . . . . . . . . . . . . . 6-5

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6

The PARALLEL IN Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

The PARALLEL OUT Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Line Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

7. Key Reference

Alphabetical Key Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Contents-viii

Contents

8. Specifications

About This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

System Performance, Corrected,

2-Port Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

System Performance, Corrected,

T/R Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

System Performance, Uncorrected . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

System Performance, General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

Test Set Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24

Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-30

Contacting Agilent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35

9. Service

Automated Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Test Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Program Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

Op Check Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7

Performance Verification Test Results . . . . . . . . . . . . . . . . . . . . . . . . 9-9

Manual Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

The Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

The LED Display Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17

The Main Switch Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17

Post-Repair Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-17

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-18

Contents-ix

Contents

Manual Control of the Multiport Test Set . . . . . . . . . . . . . . . . . . . . .9-19

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22

Rebuilt-Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-23

Major Parts and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24

Cables, Front Panel, and Main Board Assembly — Option 012

(75 Ω and 50 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26

Cables, Front Panel, and Main Board Assembly — Option 008

(50 Ω only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28

Cables, Front Panel, and Main Board Assembly— Option 006

(75 Ω only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30

Cables, Front Panel, and Main Board Assembly — Option 004

(50 Ω only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-32

Instrument Covers and Associated Parts . . . . . . . . . . . . . . . . . . . . . 9-34

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-36

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-37

10. Safety and Regulatory Information

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-4

Statement of Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Shipping Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-6

Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

Notice for Germany: Noise Declaration . . . . . . . . . . . . . . . . . . . . . . 10-7

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

Contents-x

1 Introduction and Installation

1-1

Introduction and Installation

Introduction to the Multiport Test Set

• The 87050E is a 50-ohm multiport test set that is available with 4, 8, or 12 test ports.

• The 87075C is a 75-ohm multiport test set that is available with 6 or 12 test ports.

A Complete Multiport Test System

87050E and 87075C multiport test sets are designed to work with 8712ET/ES (1.3 GHz) and 8714ET/ES (3 GHz) RF network analyzers to provide complete measurement systems for 50 ohm and 75 ohm multiport devices. These test systems offer fast measurement speed, high accuracy, and productivity features that will maximize your production throughput. They feature:

• specified performance to 1.3 GHz (87075C) or

2.2 GHz (87050E—with typical performance to 3 GHz)

• solid-state switches for fast, repeatable, and reliable switching between measurement paths

Fully Characterize Your Devices with a Single Connection

A single connection between the multiport test set and each port of the DUT allows complete testing of all transmission paths and port reflection characteristics. Agilent multiport test systems eliminate time-consuming reconnections to the DUT, keeping your production costs down and your volumes up. By reducing the number of RF connections, you also:

• lower the risk of misconnections

• reduce operator fatigue

• minimize wear on cables, fixtures, connectors, and the DUT

1-2 Chapter 1

Introduction and Installation

Introduction to the Multiport Test Set

Improve Your Competitiveness with a Fully Specified Test System

A multiport test set coupled with an 8712E series network analyzer offers fully specified performance at the actual test ports, whether you measure in a fixture or at the end of test cables. Specified performance means you can:

• get the same results no matter which test station you use to measure your DUT

• correlate test data from many DUTs across multiple test systems

• reduce measurement uncertainty to tighten your product specifications

• increase customer confidence in your products

Eliminate Redundant Connection of Calibration Standards with Test Set Cal

Calibrating a multiport test set using two-port error correction and a traditional network analyzer requires a unique instrument state for each measurement path, forcing many redundant connections of calibration standards. As the number of ports increases, so does the number of connections required to calibrate all possible measurement paths. Full calibration of the multiport test system is quick and simple when performing a Test Set Cal:

• connect short, open, and load standards only once to each measurement port

• minimize the number of through standards required during calibration

Chapter 1 1-3

Introduction and Installation

Introduction to the Multiport Test Set

Reduce the Effects of Test-System Drift with SelfCal

SelfCal is an internally automated calibration technique that uses solid-state switches to measure calibration standards located inside the test set. SelfCal executes automatically in just a few seconds (at an interval you define), so the impact to your test process is minimal. Use SelfCal to:

• re-calibrate your multiport test system, returning it to the same measurement accuracy achieved immediately after performing a Test Set Cal

• reduce the effects of test-system drift, improving overall measurement accuracy between Test Set Cals

Since SelfCal does not correct for drift associated with interconnect elements between the test set and your DUT, it is essential to use high-quality test cables, adapters, and fixtures to ensure the best measurement accuracy.

Decrease Calibration Times and Increase Production Throughput

With SelfCal, a Test Set Cal needs to be performed about once per month, if within the specified temperature range. This is unlike other test systems that typically require calibration once or twice a day. Using Test Set Cal and SelfCal, you can:

• easily reduce your overall calibration times by a factor of twenty or more

• increase the amount of time a test station can be used for measuring devices—typically, by three days per month.

Improve Measurement Accuracy with Two-Port Calibration

When using a multiport test set with an 8712ES or 8714ES S-parameter network analyzer, Test Set Cal and SelfCal support full two-port calibrations. Two-port error correction greatly improves the effective load match of the test system, providing excellent measurement accuracy.

1-4 Chapter 1

Key Conventions

This manual uses the following conventions:

FRONT-PANEL KEY

analyzer (a “hardkey”).

: This represents a key physically located on the

Introduction and Installation

Key Conventions

Softkey

the instrument’s firmware, and is displayed on the right side of the instrument’s screen next to the eight unlabeled keys.

: This indicates a “softkey”: a key whose label is determined by

Chapter 1 1-5

Introduction and Installation

If You Are Using an 8711C/12C/13C/14C Analyzer

This document is intended for use with 8712ET/ES and 8714ET/ES analyzers, so some of the information (for example, keypresses and calibration features) does not apply to your analyzer. The Agilent Technologies 87075C Multiport Test Set User’s and Service Guide is specifically written for using the 87075C multiport test set with 8711C/12C/13C/14C analyzers. You can order a copy of this manual (part number 87075-90005) by contacting Agilent. See page 35 for contact information. The manual can be also be viewed in the following two locations:

• CD-ROM (included with your multiport test set)

• Web site http://www.agilent.com/find/manuals (enter 87075C in the search field)

There is also software available for an operator’s check and performance tests that support the old version of the specifications for using the 87075C multiport test set with 8711C/12C/13C/14C analyzers.

Both the 87050E and the 87075C multiport test sets are compatible with 8711C/12C/13C/14C analyzers that contain firmware revision C.04.5.x or later. Analyzers must have 16 MBytes of DRAM and 1 MB of non-volatile RAM. For more information, refer to the Agilent Technologies 87075C Multiport Test Set User’s and Service Guide.

1-6 Chapter 1

Introduction and Installation

Installation

This section will guide you through the steps necessary to correctly and safely install your multiport test set. The steps are:

• “Step 1. Check the Shipment” on page 1-10

• “Step 2. Determine Network Analyzer Compatibility” on page 1-12

• “Step 3. Connect the Test Set to the Analyzer” on page 1-14

• “Step 4. Satisfy Electrical and Environmental Requirements” on

page 1-16

• “Step 5. Activate the Test Set and Check the System Operation” on

page 1-19

• “Step 6. Connect Peripheral Devices” on page 1-21

Chapter 1 1-7

Introduction and Installation

Installation

Figure 1-1 87050E Multiport Test Set — Three Versions

87050E Option 004 — Four Port Test Set

87050E Option 008 — Eight Port Test Set

87050E Option 012 — Twelve Port Test Set

1-8 Chapter 1

Figure 1-2 87075C Multiport Test Set — Two Versions

87075C Option 006 — Six Port Test Set

87075C Option 012 — Twelve Port Test Set

Introduction and Installation

Installation

Chapter 1 1-9

Introduction and Installation

Installation

Step 1. Check the Shipment

After you have unpacked your test set, keep the packaging materials to use if your instrument should need to be returned for maintenance or repair.

NOTE The packaging material is designed to protect the test set from damage

that can happen during shipping. Returning the test set in anything other than the original packaging may result in non-warranted damage.

Check the items received against Table 1-1 on page 1-11 to make sure that you received everything.

Inspect the test set and all accessories for any signs of damage that may have occurred during shipment. If your test set or any accessories appear to be damaged or missing, call Agilent Technologies. Refer to page 35 for contact information.

1-10 Chapter 1

Table 1-1 Test Set Accessories Supplied

Introduction and Installation

Installation

Item

No.

Description Quantity Part Number

1 Power Cord 1 See Figure 6-5 on

page 6-9.

2 Type-N Cable (Analyzer to test set’s

REFLECTION Port)

1 (75 Ω) 87075-60026

(50 Ω) 87050-60058

3 Type-N Cable (Analyzer to test set’s

TRANSMISSION Port)

1 (75 Ω) 87075-60028

(50 Ω) 87050-60060

4 Type-N Cable (Analyzer to test set’s

REFLECTION Port)

1 (75 Ω) 87075-60027

(50 Ω) 87050-60059

5 Type-N Cable (Analyzer to test set’s

TRANSMISSION Port)

1 (75 Ω) 87075-60029

(50 Ω) 87050-60061

6 Parallel Port Interface Cable 1 8120-6818

7 87050E and 87075C User's and Service

87050-90026

Guide for 871x Network Analyzers

87075C only: 87075C User's and Service Guide for E506x Network Analyzers

87075-90027

8 Test Set Calibration Disk 1 N/A

9 Performance Test Programs Disks

1 08714-60049

(DOS and LIF formats)

10 CD-ROM 1 08714-90051

1. Not to be used with a rack-mounted system or if the analyzer has had its bottom feet removed. See Figure 1-7 on page 1-19 to see how these cables are to be con- nected.

2. You will only receive these cables if you ordered Option 1CM (rack mount kit). Use these cables if you are rack-mounting your system, or if the bottom feet of the analyzer have been removed. See Figure 1-7 on page 1-19 for information on how to connect these cables.

Chapter 1 1-11

Introduction and Installation

Installation

Figure 1-3 Test Set Accessories Supplied

Step 2. Determine Network Analyzer Compatibility

The 87050E multiport test set is designed for use with 8712ET/ES and 8714ET/ES RF network analyzers, 50 Ω impedance.

The 87075C multiport test set is designed for use with 8711C/12C/13C/14C or 8712ET/ES and 8714ET/ES RF network analyzers, 75 Ω impedance (Option 1EC).

The basic function of the 87050E and the 87075C multiport test sets is identical. However, their impedance and specifications are different.

1-12 Chapter 1

Introduction and Installation

Installation

If you are using a C-series analyzer, refer to “If You Are Using an

8711C/12C/13C/14C Analyzer” on page 1-6.

Check the Firmware Revision

The firmware in your E-series analyzer must be revision E.06.00 or later. The firmware revision is displayed when you first power up the analyzer, and can also be viewed by pressing

Instrument Info

If your analyzer does not have firmware revision E.06.00 or later, then you must upgrade to the latest revision of firmware. You can perform this upgrade yourself. The current firmware is available as a set of floppy disks. To order, contact Agilent Technologies. Refer to page 35 for contact information.

The current firmware revision may also be downloaded, free of charge, through the internet. There is a link to the download site at the following URL: http://www.agilent.com/find/enasupport

CAUTION When upgrading firmware from E.05.xx to E.06.xx, it is necessary to

save the correction constants on a floppy disk before loading the new version of firmware.

SYSTEM OPTIONS Service

Chapter 1 1 -13

Introduction and Installation

Installation

Step 3. Connect the Test Set to the Analyzer

For using your system on a bench, configure and connect the two instruments as shown in Figure 1-4. Use the parallel cable that was shipped with the multiport test set to connect to the analyzer as shown.

If you will be installing your system in a rack, read “Installing the

System in a Rack,” next in this section, before connecting the test set to

the analyzer.

Figure 1-4 System Configuration

1-14 Chapter 1

Introduction and Installation

Installation

Installing the System in a Rack

Use only the recommended rack mount kit for the network analyzer (Option 1CM when ordered with the analyzer, or part number 08712-60036 when ordered separately): it needs side support rails. Do not attempt to mount the analyzer by the front panel (handles) only. The recommended rack mount kit allows you to mount the analyzer with or without handles.

The rack mount kit for the test set is Option 1CM when ordered with the test set, or part number 5063-9214 when ordered separately.

NOTE There are special semi-rigid cables that should be used to connect the

analyzer’s test ports to the test set’s REFLECTION and TRANSMISSION ports when used in a rack (or a bench configuration where the analyzer’s bottom feet have been removed). These cables were shipped with your analyzer if you ordered Option 1CM. If you order the rack mount kit separately, you will need to order these special cables separately also. See Table 1-1 on page 1-11 for part numbers.

To install your system in an 85043D rack, follow the instructions in the rack manual.

CAUTION When installing your system in other racks, improper installation may

cause shock hazards, overheating, dust contamination, and inferior system performance. For support details and information about installation and warranty, call Agilent Technologies. Refer to page 35 for the nearest office.

CAUTION When installing the system in a cabinet, the convection into and out of

the system must not be restricted. The ambient temperature (outside the cabinet) must be less than the maximum operating temperature of the system by 4 °C for every 100 watts dissipated in the cabinet. If the total power dissipated in the cabinet is greater than 800 watts, then forced convection must be used.

Chapter 1 1 -15

Introduction and Installation

Installation

Step 4. Satisfy Electrical and Environmental Requirements

NOTE Refer to your network analyzer’s User’s Guide for information on

electrical and environmental requirements for your network analyzer.

1. The line power module on your multiport test set has an autoranging input. It is designed to be used with an ac power source with a nominal voltage of either 115 V or 230 V.

2. Ensure the available ac power source meets the following requirements:

Nominal Range

Frequency: 50/60 Hz 47–63 Hz

Line Voltage: 100/115 V or 230/240 V 90–264 V

Power 45 W max

CAUTION This product has an autoranging line-voltage input. Be sure the supply

voltage is within the specified range.

If the ac line voltage does not fall within these ranges, an autotransformer that provides third-wire continuity to earth ground should be used.

3. Ensure the operating environment meets the following requirements for safety:

• indoor use

• altitude up to 15,000 feet (4,572 meters)

• temperature 0 °C to 55 °C

• maximum relative humidity 80% for temperatures up to 31 °C

decreasing linearly to 50% relative humidity at 40 °C

• use only in INSTALLATION CATEGORY II, and POLLUTION

DEGREE 2, per IEC 1010 and 664 respectively

1-16 Chapter 1

4. Verify that the power cable is not damaged, and that the power source outlet provides a protective earth ground contact. Note that the following illustration depicts only one type of power source outlet. Refer to Figure 6-5 on page 6-9 to see the different types of power cord plugs that can be used with your test set.

Figure 1-5 Protective Earth Ground

Introduction and Installation

Installation

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 the instrument, is likely to make the instrument dangerous. Intentional interruption is prohibited.

Chapter 1 1 -17

Introduction and Installation

Installation

5. Ensure there are at least two inches of clearance around the sides and back of the test set or the system cabinet.

Figure 1-6 Ventilation Clearance Requirements

6. Set up a static-safe workstation. Electrostatic discharge (ESD) can damage or destroy components.

• table mat with earth ground wire: part number 9300-0797

• wrist-strap cord with 1 Meg Ohm resistor: part number 9300-0980

•wrist-strap: part number 9300-1367

• heel straps: part number 9300-1308

• floor mat

1-18 Chapter 1

Step 5. Activate the Test Set and Check the System Operation

1. Connect the semi-rigid cables that were shipped with your test set as shown in Figure 1-7. Check Table 1-1 on page 1-11 to be sure that you are using the correct cables with your system configuration (the cables you use will be different depending on whether you are using a bench system configuration—as shown in Figure 1-7—or a rack configuration).

Figure 1-7 Connect the Front Panel RF Cables

Introduction and Installation

Installation

Chapter 1 1 -19

Introduction and Installation

Installation

NOTE Steps 2 and 3 must be performed before you can use your network

analyzer to control the multiport test set.

2. Turn on the test set.

3. Turn on the analyzer and press

Switching Test Set Multiport

. Toggle to ON.

SYSTEM OPTIONS System Config

4. The operator’s check should be performed on the system to provide a high degree of confidence that the system is working properly. Refer to Chapter 2, “Getting Started,” for instructions on how to perform the operator’s check.

5. After performing the operator’s check, you should connect any peripheral devices you will be using with your system. Refer to “Step

6. Connect Peripheral Devices,” next in this chapter.

1-20 Chapter 1

Introduction and Installation

Installation

Step 6. Connect Peripheral Devices

After you’ve performed the operator’s check to ensure that your system is working properly, connect any peripherals that you intend to use with your system.

Connecting Peripherals and Controllers

Figure 1-8 Network Analyzer and Multiport Test-Set Rear-Panel Connectors

Chapter 1 1 -21

Introduction and Installation

Installation

Refer to Figure 1-8:

• The GPIB port on the analyzer is for use with computers, other test instruments, and peripherals (printers, plotters, etc.).

• The PARALLEL PORT on the analyzer connects to the test set’s PARALLEL IN port as shown with the interconnect cable that was shipped with your test set.

• The PARALLEL OUT port on the test set, and the analyzer’s SERIAL port (RS-232) are for peripherals such as printers or plotters. The serial port can also be programmed via IBASIC for general I/O control. See your analyzer’s HP Instrument BASIC User’s Handbook for information on using IBASIC.

• The VIDEO OUT COLOR VGA port on the analyzer allows you to connect a color VGA monitor for enhanced viewing. See “Using an External VGA Monitor” in Chapter 4 of your analyzer’s User’s Guide for more information.

• The LAN ETHERTWIST connector on the analyzer is for connecting your analyzer to a local area network (LAN) for control and file access. See The LAN Interface User’s Guide Supplement for information on how to use your analyzer in a LAN.

• The DIN KEYBOARD connector can be used with an optional keyboard or bar code reader. See “Using a Keyboard” in Chapter 4 of your analyzer’s User’s Guide for more information.

NOTE See your analyzer’s User’s Guide for more specific information on GPIB

connections, parallel and serial connections, and configuring peripheral settings.

1-22 Chapter 1

Introduction and Installation

Preventive Maintenance

Preventive maintenance consists of checking the front panel connectors. This should be done at least every six months — more often if the test set is used daily on a production line or in a harsh environment.

Visually inspect the front panel connectors. The most important connectors are those to which the DUT is connected. All connectors should be clean and the center pins centered. The fingers of female connectors should be unbroken and uniform in appearance. If you are unsure whether the connectors are good, gauge the connectors to confirm that their dimensions are correct.

Figure 1-9 Maximum and Minimum Protrusion of Center Conductor From

Mating Plane

CAUTION 87050E multiport test sets only:

Connecting 75 ohm cables to the front panel 50 ohm connectors of the analyzer or test set usually results in intermittent or no electrical connections.

CAUTION 87075C multiport test sets only:

Never connect 50 ohm cables to the front panel 75 ohm connectors of the analyzer or test set. Otherwise, irreparable connector damage will occur.

Chapter 1 1 -23

Introduction and Installation

Preventive Maintenance

Cleaning the Test Set

Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.

WARNING To prevent electrical shock, disconnect the test set from power

mains before cleaning.

1-24 Chapter 1

2 Getting Started

2-1

Getting Started

Brief Tour of System

This chapter provides you with a brief tour of the system and an overview of the following topics:

• “Port Connections” on page 2-4

• “Test Set Cal and SelfCal” on page 2-6

• “Making Measurements” on page 2-9

• “Performing the Operator's Check” on page 2-16

• “Cable and Test Fixture Considerations” on page 2-22

Brief Tour of System

On the next page, refer to the figure and descriptions of the main keys and features you’ll use on your multiport system.

You should familiarize yourself with the analyzer’s features by referring to its User’s Guide.

2-2 Chapter 2

Figure 2-1 The Multiport System

Getting Started

Brief Tour of System

Table 2-1 Multiport System Features

Item # Description

MEAS 1 MEAS 2

The and keys: Use these keys to access measurement selection and test set port selection.

CAL

The key: Use this key to access the Test Set Cal and SelfCal features. See Chapter 4, “Test Set Cal and SelfCal,” for more information.

3 The test set port connection status display.

4 The test set ports.

Chapter 2 2-3

Getting Started

Port Connections

When your multiport test system is properly connected and configured as described in Chapter 1, you have the ability to switch any of the numbered ports on your test set to either the REFLECTION (or PORT 1 test set’s switching mechanism is illustrated in Figure 2-4 on page 2-10. The analyzer controls the test set through the rear panel parallel interface. Port connections are determined by your keypress selections, as shown in the “Making Measurements” examples later in this chapter. The port connection status is displayed on the test set’s front panel and on the network analyzer’s display in the upper left-hand corner (and in the softkeys, 8712ES/14ES only). See Figure 2-2 and Figure 2-3, which show status indicator examples for a transmission measurement and a reflection measurement.

) or TRANSMISSION (or PORT 2*) port on the analyzer. The

* For 8712ES/14ES analyzers only.

2-4 Chapter 2

Figure 2-2 Port Connection Status: Transmission Measurement

Getting Started

Port Connections

Figure 2-3 Port Connection Status: Reflection Measurement

Chapter 2 2-5

Getting Started

Test Set Cal and SelfCal

Before you make any measurements, you must calibrate your multiport system. By implementing the Test Set Cal and SelfCal features on your multiport system, you can increase the accuracy of your measurements and significantly increase the throughput of your multiport measurements by eliminating frequent and lengthy calibration procedures.

Cal Type What is it? How to do it? When to do it?

Test Set Cal

SelfCal An internally

A full calibration of the multiport test system. Requires connections of external calibration standards.

automated calibration technique. Uses solid-state switches to measure calibration standards located inside the test set.

The Test Set Cal process that is best suited for your particular measurements will depend on the type of DUT you are testing. Refer to the following Test Set Cal examples for one that best matches your DUT.

• “Test Set Cal Example #1: The DUT Has Insertable Port Pairs” on

page 4-22*

• “Test Set Cal Example #2: The DUT Has Noninsertable Port Pairs

with Identical Connectors” on page 4-28*

Press

open, and load standards to each measurement port. Connect through-standards to each adjacent port pair. (Refer to

on page 4-21

You d o

to perform a SelfCal. Press

Details” on page 4-59

CAL Test Set Cal

Create “TSET_CAL”

. Connect short,

“Test Set Cal Examples”

not have to disconnect your DUT

CAL

Test Set Cal Periodic SelfCal

SelfCal Once

( or

). (Refer to “SelfCal

When you first set up your test system. Thereafter, about once a month if within the specified temperature range.

Set SelfCal to execute automatically as often as needed (typically once an hour).

• “Test Set Cal Example #3: The DUT Has a Noninsertable Port Pair

with Dissimilar Connectors” on page 4-43*

2-6 Chapter 2

Getting Started

Test Set Cal and SelfCal

*Insertable Port Pairs versus Noninsertable Port Pairs:

During the through portion of the calibration, if an adjacent port pair (for example, 1-to-2, 3-to-4, 5-to-6, etc.) can be connected directly without using a through cable or an adapter, the port pair is insertable. If an adjacent port pair can only be connected by using a through cable or an adapter, the port pair is noninsertable.

For all the details on calibrating your test set, refer to Chapter 4, “Test

Set Cal and SelfCal.”

Chapter 2 2-7

Getting Started

Test Set Cal and SelfCal

This page intentionally left blank.

2-8 Chapter 2

Getting Started

Making Measurements

This section will show you the basic steps in making the following measurements:

• “Transmission Measurements” on page 2-10

• “Reflection Measurements Using a 1-Port Cal” on page 2-12

• “Reflection Measurements Using a 2-Port Cal (8712ES/14ES Only)”

on page 2-14

NOTE These measurement examples assume that calibration has already been

performed.

IMPORTANT 8712ES/14ES analyzers only:

The test set port assigned as the must always be the low numbered test set port while the test set port assigned as the must always be the high numbered port.

(S11) Port

(S22) Port

For more detailed information on making measurements with your multiport test set, refer to Chapter 3, “Measurement Examples.”

The multiport test set contains cables and line-lengths on a pc board which give it a long electrical delay. Your DUT and test cables (if any) and/or test fixture add even more electrical delay to your test setup. To maximize measurement accuracy, the effects of this electrical delay must be minimized. For a discussion of techniques to reduce the effects of electrical delay in your test setup, refer to “Measuring Devices with Long Electrical Delay,” located in Chapter 5 of your analyzer’s User’s Guide.

Chapter 2 2-9

Getting Started

Making Measurements

Transmission Measurements

Figure 2-4 shows:

• test set PORT 3 switched to the analyzer’s REFLECTION (or PORT 1

) port

• test set PORT 4 switched to the analyzer’s TRANSMISSION (or

PORT 2

) port

• all other test set ports terminated with the test set impedance

Figure 2-4 Transmission Measurement: PORT 3 to PORT 4

* For 8712ES/14ES analyzers only.

2-10 Chapter 2

Getting Started

Making Measurements

To make the connections as illustrated in Figure 2-4 and perform a transmission measurement, you would press the following keys on the analyzer:

1. Press .

2. Press .

3. Press (

(S11) Port

4. Press .

MEAS 1

Multiport Selection

Reflection Port Num

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

7. Press (

S21 Tran 3–>4

4 Enter Done

Transmissn

Selects measurement channel 1 as the active measurement channel .

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 3 of the test set. Allows you to select a test set port for

your measurement.

Selects PORT 4 of the test set. This

completes your selection of test set ports for your measurement.

Selects the forward transmission type of measurement.

* For 8712ES/14ES analyzers only.

NOTE For 8712ES/14ES analyzers only:

To measure transmission from test set PORT 4 to test set PORT 3, use the same port assignments as above, but press for the measurement type.

Chapter 2 2-11

S12 Tran 4–>3

Getting Started

Making Measurements

Reflection Measurements Using a 1-Port Cal

Figure 2-5 shows:

• test set PORT 5 switched to the analyzer’s REFLECTION (or PORT 1

• all other test set ports terminated with the test set impedance

Figure 2-5 Reflection Measurement: PORT 5

) port

* For 8712ES/14ES analyzers only.

2-12 Chapter 2

Getting Started

Making Measurements

To make the connections as illustrated in Figure 2-5 and perform a reflection measurement, you would press the following keys on the analyzer:

1. Press .

2. Press .

3. Press (

(S11) Port

4. Press

5. Press ( or

S11 ReflPort5

MEAS 1

Multiport Selection

Reflection Port Num

Enter Done

Reflection

* For 8712ES/14ES analyzers only.

Selects measurement channel 1 as the active measurement channel .

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 5 of the test set. This completes your selection of test set ports for your measurement.

Selects the forward reflection type of measurement.

Chapter 2 2 -13

Getting Started

Making Measurements

Reflection Measurements Using a 2-Port Cal (8712ES/14ES Only)

In this reflection measurement it is necessary to assign both test set ports. This is because, when using a 2-port cal, the analyzer sweeps in both directions as it measures all four S-parameters. Figure 2-6 shows:

• test set PORT 3 switched to the analyzer’s PORT 1 port

• test set PORT 4 switched to the analyzer’s PORT 2 port

• all other test set ports terminated with the test set impedance

Figure 2-6 Reflection Measurement Using a 2-Port Cal: PORT 3

2-14 Chapter 2

Getting Started

Making Measurements

To make the connections as illustrated in Figure 2-6 and perform a reflection measurement, you would press the following keys on the analyzer:

1. Press .

2. Press .

3. Press .

4. Press .

5. Press .

6. Press .

7. Press

MEAS 1

Multiport Selection

(S11) Port

3 Enter

(S22) Port

4 Enter Done

S11 ReflPort3

Selects measurement channel 1 as the active measurement channel .

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 3 of the test set. Allows you to select a test set port for

your measurement. Selects PORT 4 of the test set. This

completes your selection of test set ports for your measurement.

Selects the forward reflection type of measurement.

NOTE For 8712ES/14ES analyzers only:

To measure reflection using test set PORT 4, use the same port assignments as above, but press for the measurement type.

Chapter 2 2 -15

S22 ReflPort4

Getting Started

Performing the Operator's Check

Description

The operator’s check should be performed when you receive your test set, and any time you wish to have confidence that your test set is functioning properly. It is not designed to verify specifications or to check the validity of calibrations. To verify specifications, refer to “Performance

Verification Test Results” on page 9-9. To check a calibration, refer to “Verifying the Calibration” on page 4-70. The Operator’s Check uses

traditional analyzer calibrations rather than a Test Set Cal. This is because the multiport test set is treated as a DUT by the analyzer.

NOTE The operator’s check for the test set assumes that the network analyzer

is functioning properly. It also assumes that the analyzer has no test fixture or DUT attached to the test set, and has a valid default calibration. Refer to your analyzer’s User’s Guide for information on performing the analyzer’s operator’s check.

Procedure

The quickest method for performing the operator’s check is to use the “Op Verif” portion of the performance test software (see Chapter 9). This method will take approximately one minute to perform and no external connections to the test set’s test ports are required. You can run this software using the IBASIC feature in your analyzer.

If you don’t have access to the performance test software, the following manual procedure can be used instead.

Equipment Required

For 87050E multiport test sets:

• 8712ET/ES or 8714ET/ES RF network analyzer, 50 Ω impedance

•Cables, 50 Ω type-N, (shipped with the test set—see Table 1-1 on

page 1-11)

• 50 Ω type-N load (part of 85032B calibration kit)

2-16 Chapter 2

Getting Started

Performing the Operator's Check

• 50 Ω cable such as the one that was shipped with your analyzer (part number 8120-6469)

For 87075C multiport test sets:

• 8712ET/ES or 8714ET/ES RF network analyzer, 75 Ω impedance (Option 1EC)

•Cables, 75 Ω type-N, (shipped with the test set—see Table 1-1 on

page 1-11)

• 75 Ω type-N load (part of 85036B calibration kit)

• 75 Ω cable such as the one that was shipped with your analyzer (part number 8120-6468)

NOTE The following section contains illustrations depicting the analyzer

display. Your display may appear different, depending on the model of your analyzer.

Process

Check Unterminated Return Loss.

1. Make sure the test set is properly connected to the analyzer using the parallel port interface cable and the front panel RF cables as described in Chapter 1.

2. Make sure that both instruments are turned on, and that the analyzer is configured for use with a multiport test set as described in

“Step 5. Activate the Test Set and Check the System Operation” on page 1-19.

3. Press .

4. Press ( or

(S11) Port 1 Enter Done

5. Press ( or

PRESET MEAS 1 Multiport Selection Reflection Port Num

) *.

Reflection S11 ReflPort1

) to configure the analyzer to

make a reflection measurement.

6.Press .

7. Press to make sure the analyzer’s default

FREQ CAL Default 1-Port

Start 3 MHz Stop 1300 MHz

calibration is in place. (This disables the multiport Test Set Cal.)

* For 8712ES/14ES analyzers only.

Chapter 2 2 -17

Getting Started

Performing the Operator's Check

8. Verify that the return loss of the selected port, with nothing connected, is between about 0 dB and −20 dB. See Figure 2-7 on

page 2-18 for an example measurement. Your results should be

somewhat similar.

9. For 8712ET/14ET analyzers only: repeat steps 4 and 8 for all the remaining ports on your test set.

For 8712ES/14ES analyzers only: repeat steps 4 and 8 for all but the highest numbered port on your test set. For the highest numbered port, press

Enter Done S22 ReflPort

MEAS 1 Multiport Selection (S22) Port port number

. Repeat step 8.

Figure 2-7 Operator’s Check: Unterminated Return Loss

2-18 Chapter 2

Check Terminated Return Loss.

Getting Started

Performing the Operator's Check

10.Press ( or

(S11) Port 1 Enter Done

11.Press ( or

MEAS 1 Multiport Selection Reflection Port Num

) *.

Reflection S11 ReflPort1

) to configure the analyzer to

make a reflection measurement.

12.Connect a load (impedance must match that of your test set) to PORT 1 on the test set.

13.Verify that the return loss of the selected port is below −11 dB across the frequency range. See Figure 2-8 for an example measurement. Your results should be somewhat similar.

14.For 8712ET/14ET analyzers only: Repeat steps 9–12 for all the remaining ports on your test set.

For 8712ES/14ES analyzers only: repeat steps 9–12 for all but the highest numbered port on your test set. For the highest numbered port, press

Enter Done S22 ReflPort

MEAS 1

. Repeat step 12.

Multiport Selection (S22) Port port number

Figure 2-8 Operator’s Check: Terminated Return Loss

* For 8712ES/14ES analyzers only.

Chapter 2 2 -19

Getting Started

Performing the Operator's Check

Check Transmission Measurement.

CAL Default Response Default 2-Port

15. ( or

16.Press ( or

(S11) Port 1 Enter Transmissn Port Num (S22) Port 2 Enter Done

17.Press ( or

MEAS 1 Multiport Selection Reflection Port Num

) ( or

MEAS 1 Transmissn S21 Tran 1–>2

18.Connect a through cable between PORT 1 and PORT 2 on the test set.

19.Verify that the transmission measurement of the selected ports is between −2 dB and −19 dB across the frequency range. See Figure 2-9 for an example measurement. Your results should be somewhat similar.

Figure 2-9 Operator’s Check: Transmission Measurement

)

* For 8712ES/14ES analyzers only.

2-20 Chapter 2

Getting Started

Performing the Operator's Check

If the Multiport Test Set Fails the Operator's Check

If the multiport test set fails the operator’s check, verify that your analyzer passes its operator’s check. Refer to your analyzer’s User’s Guide for information on the analyzer’s operator’s check. If the analyzer passes its operator’s check, your multiport test set may need adjustment or servicing. Contact Agilent for assistance. Refer to page 35 for the nearest office. Before shipping your multiport test set, fill out and attach the blue repair tag, located at the back of the analyzer’s Service Guide.

Chapter 2 2 -21

Getting Started

Cable and Test Fixture Considerations

For the most accurate, repeatable measurements, it is imperative that the cables and test fixtures that you use to test devices introduce as little drift as possible. Although the system’s Test Set Cal feature can effectively calibrate out the effects of external cabling and fixtures, the drift-removing SelfCal feature can only remove subsequent drift internal to the system. It cannot compensate for subsequent drift associated with any external cabling or fixturing. See “Test Set Cal and SelfCal: Theory

of Operation” on page 4-56.

Drift can be minimized by using high quality connectors, semi-rigid cables (when possible), and fixturing that reduces cable movement to a minimum.

2-22 Chapter 2

3 Measurement Examples

3-1

Measurement Examples

Your multiport system allows you to measure both forward and reverse responses of a multiport device without having to manually change connections. This chapter presents examples of making many types of measurements on a 50 ohm device and a 75 ohm device.

Although your test set may have a different number of ports, the 12-port test set (Option 012) will most often be depicted and described here.

See your analyzer’s User’s Guide for example displays of various measurements. You will also find information on using the analyzer’s built-in features such as markers and limit lines to help interpret your measurements quickly and easily.

3-2 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

The following illustration and tables show how with one mechanical setup you can make multiple measurements on a 50 ohm duplexer simply by changing the port selections. This example will show how to make six common duplexer measurements:

• Insertion Loss: ANT port to Rx port

• Insertion Loss: Tx port to ANT port

• Isolation: Rx port to Tx port

• Return Loss: ANT port

• Return Loss: Rx port

• Return Loss: Tx port

Chapter 3 3-3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Figure 3-1 Measuring a 50 Ohm Duplexer— Six Measurements,

One Test Setup

NOTE Transmission and reflection responses of any multiport device can be

affected by the load match presented to ports of the DUT that are outside of the measurement path. The effect of test set load match on the measurements is device dependent and needs to be considered.

3-4 Chapter 3

Example: Measuring a 50 Ohm Duplexer

Table 3-1 Making Measurements using an 8712ET/14ET Analyzer

Measurement Examples

Measurement Type

Measurement ANT to Rx

Test Set Port Assigned as the Reflection Port

Test Set Port Assigned as the Transmission Port

INSERTION

LOSS

Transmission

–>2)

(Tran 1

132123

2 1 3 – – –

INSERTION

LOSS

Transmission

Tx to ANT (Tran 3–>1)

ISOLATION

Transmission

Rx to Tx (Tran 2–>3)

RETURN

LOSS

Reflection

ANT port (Refl Port 1)

RETURN

LOSS

Reflection

Rx port (Refl Port2)

Table 3-2 Making Measurements using an 8712ES/14ES Analyzer

Measurement Type

Measurement ANT to Rx

INSERTION

LOSS

–>2)

(Tran 1

INSERTION

LOSS

Tx to ANT (Tran 3–>1)

ISOLATION

S21

Rx to Tx (Tran 2–>3)

RETURN

LOSS

S11

ANT port (Refl Port 1)

RETURN

LOSS

Rx port (Refl Port2)

RETURN

LOSS

Reflection

Tx port (Refl Port 3)

RETURN

LOSS

S22

Tx port (Refl Port 3)

Tes t S e t Po r t Assigned as the

1 1 2 111

(S11) Port

Tes t S e t Po r t Assigned as the

233

(S22) Port

* When using a 2-port Test Set calibration, this test set port is assigned as the . “n” is any

test-set port in your measurement configuration that has a higher number than the port assigned as

(S11) Port

the .

IMPORTANT 8712ES/14ES analyzers only: the test set port assigned as the must always

be the low numbered test set port while the test set port assigned as the must always be the high numbered port.

(S22) Port

(S11) Port

(S22) Port

Chapter 3 3-5

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Calibrating the Multiport System for Measuring a 50 Ohm Duplexer

For a complete calibration process for measuring the 50 ohm duplexer in this example, refer to “Test Set Cal Example #3: The DUT Has a

Noninsertable Port Pair with Dissimilar Connectors” on page 4-43.

The Test Set Cal process that is best suited for your particular measurements will depend on the type of DUT you are testing. If your 50 ohm DUT is different from the one used in this example, refer to the following additional Test Set Cal examples for one that best matches your DUT.

• “Test Set Cal Example #1: The DUT Has Insertable Port Pairs” on

page 4-22

• “Test Set Cal Example #2: The DUT Has Noninsertable Port Pairs

with Identical Connectors” on page 4-28

For all the details on calibrating your test set, refer to Chapter 4, “Test

Set Cal and SelfCal.”

3-6 Chapter 3

This page intentionally left blank.

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Chapter 3 3-7

Figure 3-2

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Insertion Loss: ANT Port to Rx Port

To perform the insertion loss measurement (measuring the loss from the ANT port of the DUT to the Rx port of the DUT), press the following keys on the analyzer:

3-8 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

7. Press (

S21 Tran 1–>2

2 Enter Done

Transmissn

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set.

Selects the forward transmission type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3-9

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Insertion Loss: Tx Port to ANT Port

To perform the insertion loss measurement (measuring the loss from the Tx port of the DUT to the ANT port of the DUT), press the following keys on the analyzer:

3-10 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Transmissn Port Num

(S11) Port

(

4. Press .

Enter

5. Press

Reflection Port Num

( or

(S22) Port

6. Press

7. Press (

S12 Tran 3–>1

3 Enter Done

Transmissn

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 3 of the test set.

Selects the reverse transmission type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3-11

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-4

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Isolation: Rx Port to Tx Port

To perform the isolation measurement (a transmission measurement from the Rx port to the Tx port on the DUT), press the following keys on the analyzer:

3-12 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

MEAS 1

2. Press

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

Done

7. Press (

S21 Tran 2–>3

Transmissn

Enter

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 3 of the test set.

Selects the forward transmission type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -13

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-5

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Return Loss: ANT Port

To perform the return loss measurement on the ANT port of the DUT, press the following keys on the analyzer:

3-14 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

5. Press ( or

S11 ReflPort1

Enter

Reflection

Optional steps—saving the instrument state:

6. Press .

7. Press .

SAVE RECALL

Save State

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set.

Selects the forward reflection type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

* For 8712ES/14ES analyzers only.

IMPORTANT For 8712ES/14ES analyzers using a 2-port Test Set cal only:

Measuring the return loss of the ANT port is best done using two separate measurements in order to obtain the highest measurement accuracy. The following table explains the two measurements.

Chapter 3 3 -15

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

First Measurement

Second Measurement

Tes t Set Port

Assigned as

the

(S11) Port (S22) Port

PORT 1 (ANT port)

Tes t Se t Port

Assigned as

PORT 2 (Rx port)

PORT 3 (Tx port)

the

Measurement Explanation

When test set PORT 2 is assigned as the

(S22) Port

with an error-corrected load, while the DUT’s Tx port is terminated with the uncorrected internal load of the test set. Since the error-corrected load match of the test system is considerably better than the uncorrected terminations, the portion of the trace corresponding to the ANT-to-Rx path will be more accurate than the portion of the trace corresponding to the ANT-to-Tx path. For the first measurement, verify the ANT-port return loss by using a limit-line on the portion of the trace corresponding to the ANT-to-Rx path. The ANT-port return loss corresponding to the ANT-to-Tx path will be tested in the second measurement.

When test set PORT 3 is assigned as the

(S22) Port

with an error-corrected load, while the DUT’s Rx port is terminated with the uncorrected internal load of the test set. Since the error-corrected load match of the test system is considerably better than the uncorrected terminations, the portion of the trace corresponding to the ANT-to-Tx path will be more accurate than the portion of the trace corresponding to the ANT-to-Rx path. For the second measurement, verify the ANT-port return loss by using a limit-line on the portion of the trace corresponding to the ANT-to-Tx path. The ANT-port return loss corresponding to the ANT-to-Rx path was tested in the first measurement.

, the DUT’s Rx port is terminated

, the DUT’s Tx port is terminated

3-16 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

To set up your test system to perform the two measurements in the previous table, it is fastest and easiest to use both of the analyzer measurement channels. For instructions on using both measurement channels, refer to “Using Different Test Set Port Assignments for Both

Measurement Channels” on page 3-45.

Chapter 3 3 -17

Figure 3-6

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Return Loss: Rx Port

To perform the return loss measurement on the Rx port of the DUT, press the following keys on the analyzer:

3-18 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S22) Port

4. Press .

5. Press ( or

S22 ReflPort2

Enter Done

Reflection

Optional steps—saving the instrument state:

6. Press .

7. Press .

SAVE RECALL

Save State

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set.

For 8712ES/14ES analyzers:

PORT 1 is automatically selected as the .

(S11) Port

Selects the reflection measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

* For 8712ES/14ES analyzers only.

Chapter 3 3 -19

Figure 3-7

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Measuring Return Loss: Tx Port

To perform the return loss measurement on the Tx port of the DUT, press the following keys on the analyzer:

3-20 Chapter 3

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

For 8712ES/14ES analyzers using a 2-port Test Set cal only:

5. Press .

6. Press .

(S22) Port

Enter Done

For all analyzers:

7. Press ( or

S22 ReflPort3

Reflection

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. (In this step, you select a second test set port. This is

necessary because when using a 2-port cal, the analyzer sweeps in both directions as it measures all S-parameters.)

Allows you to select a test set port for your measurement. Selects PORT 3 of the test set.

Selects the reflection measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -21

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Measurement Examples

Example: Measuring a 50 Ohm Duplexer

This page intentionally left blank.

3-22 Chapter 3

Measurement Examples

Example: Measuring a 75 Ohm Tap

The following illustration and tables show how with one mechanical setup you can make multiple measurements on a 75 ohm tap simply by changing the port selections. This example will show how to make six common tap measurements:

• Insertion Loss: In port to Out port

• Reverse Isolation: Out port to In port

• Insertion Loss: In port to Tap1

• Isolation: Tap3 to Tap4

• Return Loss: In port

• Return Loss: Out port

Chapter 3 3 -23

Measurement Examples

Example: Measuring a 75 Ohm Tap

Figure 3-8 Measuring a 75 Ohm Tap — Six Measurements,

One Test Setup

NOTE Transmission and reflection responses of any multiport device can be

affected by the load match presented to ports of the DUT that are outside of the measurement path. The effect of the test set load match on the measurements is device dependent and needs to be considered.

3-24 Chapter 3

Example: Measuring a 75 Ohm Tap

Table 3-3 Making Measurements using an 8712ET/14ET Analyzer

Measurement Examples

Measurement Type

Measurement In to Out

Test Set Port Assigned as the Reflection Port

Test Set Port Assigned as the Transmission Port

INSERTION

LOSS

Transmission

(Tran 1–>2)

12 1512

2136

REVERSE

ISOLATION

Transmission

Out to In (Tran 2–>1)

INSERTION

LOSS

Transmission

In to Tap1 (Tran 1–>3)

ISOLATION

Transmission

Tap3 t o Tap4 (Tran 5–>6)

RETURN

LOSS

Reflection

In port (Refl Port 1)

Table 3-4 Making Measurements using an 8712ES/14ES Analyzer

Measurement Type

Measurement In to Out

INSERTION

LOSS

(Tran 1–>2)

REVERSE

ISOLATION

Out to In (Tran 2–>1)

INSERTION

LOSS

In to Tap1 (Tran 1–>3)

ISOLATION

Tap3 t o Tap4 (Tran 5–>6)

RETURN

LOSS

In port (Refl Port 1)

RETURN

LOSS

Reflection

Out port (Refl Port 2)

––

RETURN

LOSS

Out port (Refl Port 2)

Tes t S e t Po rt Assigned as th e

111511

(S11) Port

Tes t S e t Po rt Assigned as th e

2236

(S22) Port

* When using a 2-port Test Set calibration, this test set port is assigned as the .

IMPORTANT 8712ES/14ES analyzers only: the test set port assigned as the must

(S22) Port

(S11) Port

always be the low numbered test set port while the test set port assigned as the

(S22) Port

must always be the high numbered port.

Chapter 3 3 -25

Measurement Examples

Example: Measuring a 75 Ohm Tap

Calibrating the Multiport System for Measuring a 75 Ohm Tap

For a complete calibration process for measuring the 75 ohm tap in this example, refer to “Test Set Cal Example #2: The DUT Has Noninsertable

Port Pairs with Identical Connectors” on page 4-28.

The Test Set Cal process that is best suited for your particular measurements will depend on the type of DUT you are testing. If your 75 ohm DUT is different from the one used in this example, refer to the following additional Test Set Cal examples for one that best matches your DUT.

• “Test Set Cal Example #1: The DUT Has Insertable Port Pairs” on

page 4-22

• “Test Set Cal Example #3: The DUT Has a Noninsertable Port Pair

with Dissimilar Connectors” on page 4-43

For all the details on calibrating your test set, refer to Chapter 4, “Test

Set Cal and SelfCal.”

3-26 Chapter 3

This page intentionally left blank.

Measurement Examples

Example: Measuring a 75 Ohm Tap

Chapter 3 3 -27

Figure 3-9

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Insertion Loss: In Port to Out Port

To perform the insertion loss measurement (measuring the loss from the In port of the DUT to the Out port of the DUT), press the following keys on the analyzer:

3-28 Chapter 3

Measurement Examples

Example: Measuring a 75 Ohm Tap

1. Press .

MEAS 1

2. Press

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

Done

7. Press (

S21 Tran 1–>2

Transmissn

Enter

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set.

Selects the forward transmission type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -29

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-10

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Reverse Isolation: Out Port to In Port

To perform the reverse isolation measurement (measuring the loss from the Out port of the DUT to the In port of the DUT), press the following keys on the analyzer:

3-30 Chapter 3

NOTE For 8712ES/14ES analyzers only:

If you already selected test set ports (PORT 1 and PORT 2) for the previous insertion loss measurement (In to Out), it is not necessary to reselect ports as described in steps 3–6. When you press , the analyzer automatically displays the reverse isolation measurement.

Measurement Examples

Example: Measuring a 75 Ohm Tap

S12 Tran 2–>1

1. Press .

2. Press .

3. Press (

(S11) Port

4. Press ( or

5. Press (

(S22) Port

6. Press ( or

Done

7. Press (

S12 Tran 2–>1

MEAS 1

Multiport Selection

Reflection Port Num

1 Enter

Transmissn Port Num

1 2 Enter

Transmissn

) .

)

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 2 (or PORT 1

) of the test set.

Allows you to select a test set port for your measurement.

Selects PORT 1 (or PORT 2

) of the test set.

Selects the forward transmission (or reverse transmission*) type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughp ut.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -31

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-11

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Insertion Loss: In Port to Tap1

To perform the isolation measurement (a transmission measurement from the In port to the Tap1 port on the DUT), press the following keys on the analyzer:

3-32 Chapter 3

Measurement Examples

Example: Measuring a 75 Ohm Tap

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

7. Press (

S21 Tran 1–>3

3 Enter Done

Transmissn

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 3 of the test set.

Selects the forward transmission type of measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -33

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-12

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Isolation: Tap3 to Tap4

To perform the isolation measurement (a transmission measurement from the Tap3 port to the Tap4 port on the DUT), press the following keys on the analyzer:

3-34 Chapter 3

Measurement Examples

Example: Measuring a 75 Ohm Tap

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

7. Press (

S21 Tran 5–>6

6 Enter Done

Transmissn

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 5 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 6 of the test set.

Selects the forward transmission type of measurement.

These optional steps allow you to save the ins tr um ent stat e. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -35

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-13

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Return Loss: In Port

To perform the return loss measurement on the input port of the DUT using a 1-port cal, press the following keys on the analyzer:

3-36 Chapter 3

Measurement Examples

Example: Measuring a 75 Ohm Tap

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

For 8712ES/14ES analyzers using a 2-port Test Set cal only:

5. Press .

6. Press .

(S22) Port

Enter Done

For all analyzers:

7. Press ( or

S11 ReflPort1

Reflection

Optional steps—saving the instrument state:

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. (In this step, you select a second test set port. This is

necessary because, when using a 2-port cal, the analyzer sweeps in both directions as it measures all S-parameters.)

Allows you to select a test set port for your measurement. Selects PORT 2 of the test set.

Selects the reflection measurement.

These optional steps allow you to save the instrument state. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

8. Press .

9. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -37

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Figure 3-14

Measurement Examples

Example: Measuring a 75 Ohm Tap

Measuring Return Loss: Out Port

To perform the return loss measurement on the output port of the DUT using a 1-port cal, press the following keys on the analyzer:

3-38 Chapter 3

NOTE For 8712ES/14ES analyzers only:

If you already assigned test set PORT 2 as the for the previous return loss measurement (In port), it is not necessary to reselect ports as described in steps 2–4. When you press , the analyzer automatically displays the PORT 2 return loss measurement.

Measurement Examples

Example: Measuring a 75 Ohm Tap

(S22) Port

S22 ReflPort2

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S22) Port

4. Press .

5. Press ( or

S22 ReflPort2

Enter

Reflection

Optional steps—saving the instrument state:

6. Press .

7. Press .

SAVE RECALL

Save State

Selects measurement channel 1 as the active measurement channel.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set.

For 8712ES/14ES analyzers:

PORT 1 is automatically selected as the .

(S11) Port

Selects the reflection measurement.

These optional steps allow you to save the ins tr um ent stat e. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

* For 8712ES/14ES analyzers only.

Chapter 3 3 -39

Measurement Examples

Example: Measuring a 75 Ohm Tap

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3-40 Chapter 3

Measurement Examples

Using Two Measurement Channels Simultaneously

You can use each measurement channel on the analyzer to view two different measurements simultaneously. This can be done using the same or different test set port assignments for each measurement channel.

Using the Same Test Set Port Assignments for Both Measurement Channels

You can assign test set ports once and use both measurement channels on the analyzer to view two different measurements simultaneously. This saves the time of having to assign test set ports twice (once for each measurement channel).

For example, you can make a transmission measurement between two ports on your DUT and make a reflection measurement on one of those ports at the same time. Refer to Figure 3-15 on page 3-42.

Chapter 3 3 -41

Measurement Examples

Using Two Measurement Channels Simultaneously

Figure 3-15 Simultaneous Measurements Using the Same Test Set Port

Assignments for Both Measurement Channels

To set up the analyzer to use the same test set port assignments for both measurement channels, press the following keys on the analyzer:

3-42 Chapter 3

Measurement Examples

Using Two Measurement Channels Simultaneously

1. Press .

2. Press .

MEAS 1

Multiport Selection

3. Press

Reflection Port Num

( or

(S11) Port

4. Press .

Enter

5. Press

Transmissn Port Num

( or

(S22) Port

6. Press

7. Press (

S21 Tran 1–>2

8. Press .

9. Press ( or

S11 ReflPort1

2 Enter Done

Transmissn

MEAS 2

Reflection

Selects measurement channel 1 as the active measurement channel that will display the transmission measurement.

Displays a menu with softkeys for selecting test set ports for your measurement.

Allows you to select a test set port for your measurement.

Selects PORT 1 of the test set. Allows you to select a test set port for your measurement.

Selects PORT 2 of the test set.

Selects the forward transmission type of measurement.

Selects measurement channel 2 as the active measurement channel that will display the reflection measurement.

Selects the reflection measurement.

Optional steps—saving the instrument state:

10. Press .

11. Press .

SAVE RECALL

Save State

* For 8712ES/14ES analyzers only.

Chapter 3 3 -43

These optional steps allow you to save the ins tr um ent stat e. Recalling an instrument state, rather than manually re-entering the analyzer parameters, can save time and improve measurement throughput.

Displays a menu with softkeys for saving and recalling analyzer data.

Saves the instrument state.

Measurement Examples

Using Two Measurement Channels Simultaneously

NOTE For analyzers using an Enhanced Response/1-Port Test Set Calibration:

When making dual measurements with alternate sweep off— the default mode for most types of measurements—both measurement channels are sweeping simultaneously. It is important to note that the test set’s assigned transmission (or S

) port (PORT 2 in this example) is

terminated with the test set transmission path and network analyzer transmission input for both the transmission and the reflection measurement. It is not connected to the internal load. This means that during the reflection measurement, test set PORT 2 is not terminated with the internal load. To obtain the most accurate reflection measurements, test set PORT 2 should be terminated with the internal load. This can be accomplished by turning alternate sweep on (press

SWEEP Alt Sweep

, toggle to ON). The analyzer will now sweep one measurement channel, then the other, which allows the port to be properly terminated internally during the reflection measurement. You can observe the transmission port LED (PORT 2 in this example) turning on and off with each sweep.

* For 8712ES/14ES analyzers only.

3-44 Chapter 3

Agilent 87075C Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Introduction and Installation

Introduction to the Multiport Test Set

A Complete Multiport Test System

Fully Characterize Your Devices with a Single Connection

Improve Your Competitiveness with a Fully Specified Test System

Eliminate Redundant Connection of Calibration Standards with Test Set Cal

Reduce the Effects of Test-System Drift with SelfCal

Decrease Calibration Times and Increase Production Throughput

Improve Measurement Accuracy with Two-Port Calibration

Key Conventions

If You Are Using an 8711C/12C/13C/14C Analyzer

Installation

Step 1. Check the Shipment

Step 2. Determine Network Analyzer Compatibility

Step 3. Connect the Test Set to the Analyzer

Step 4. Satisfy Electrical and Environmental Requirements

Step 5. Activate the Test Set and Check the System Operation

Step 6. Connect Peripheral Devices

Preventive Maintenance

Cleaning the Test Set

2 Getting Started

Brief Tour of System

Port Connections

Test Set Cal and SelfCal

Making Measurements

Transmission Measurements

Reflection Measurements Using a 1-Port Cal

Reflection Measurements Using a 2-Port Cal (8712ES/14ES Only)

Performing the Operator's Check

Description

Procedure

If the Multiport Test Set Fails the Operator's Check

Cable and Test Fixture Considerations

3 Measurement Examples

Example: Measuring a 50 Ohm Duplexer

Calibrating the Multiport System for Measuring a 50 Ohm Duplexer

Measuring Insertion Loss: ANT Port to Rx Port

Measuring Insertion Loss: Tx Port to ANT Port

Measuring Isolation: Rx Port to Tx Port

Measuring Return Loss: ANT Port

Measuring Return Loss: Rx Port

Measuring Return Loss: Tx Port

Example: Measuring a 75 Ohm Tap

Calibrating the Multiport System for Measuring a 75 Ohm Tap

Measuring Insertion Loss: In Port to Out Port

Measuring Reverse Isolation: Out Port to In Port

Measuring Insertion Loss: In Port to Tap1

Measuring Isolation: Tap3 to Tap4

Measuring Return Loss: In Port

Measuring Return Loss: Out Port

Using Two Measurement Channels Simultaneously

Using the Same Test Set Port Assignments for Both Measurement Channels