Agilent Technologies 85025A Manuel

User’s and Service Guide

Agilent Technologies

85025A/B/D/E

Detectors

Manufacturing Part Number: 85025-90063

Supersedes 85025-90014 & 85025-90031

Printed in USA

Print Date: January 2013

Supersedes September 2002

Hewlett-Packard to Agilent Technologies Transition

This manual may contain references to HP or Hewlett-Packard. Please note that

Hewlett-Packard's former test and measurement, semiconductor products and chemical analysis

businesses are now part of Agilent Technologies. To reduce potential confusion, the only

change to product numbers and names has been in the company name prefix: where a product

number/name was HP XXXX the current name/number is now Agilent XXXX. For example,

model number HP 85109C is now model number Agilent 85109C.

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THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED "AS IS," AND IS SUBJECT TO BEING

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NOTE In any correspondence or telephone conversation, refer to the Agilent product by its model

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Safety Notes

The following safety notes are used throughout this manual. F

amiliarize

yourself with each of the notes 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, would 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.

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.

How to Use This Guide

This guide uses the following conventions:

Front-Panel Key

This represents a key physically located on the instrument.

NNNNNNNNNNNNNNNNNNNNNNN

Softkey

This indicates a \softkey," a key whose label is determined by

the instrument's rmware.

Screen Text

This indicates text displayed on the instrument's screen.

Docu entation Description

This manual contains information on operating, testing, and servicing the

Agilent 85025A/B/D/E detectors.

Contents

1. General Information

Product Description . . . . . . . . . . . . . . . . . . . . . . -

Specications and Supplemental Characteristics . . . . . . . . . -3

Operating Environment . . . . ....... . . . . . . . . . -9

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

Storage and Shipment . ... . . . . . . . . . . . . . . . . . -9

Environment . .. . . . . . . . . . . . . . . . . . . . . . -9

Packaging ..........................- 0

Returning a Detector for Service . . . . . . . . . . . . . . . . - 0

2. Installation

Initial Inspection . . . . . . . . . . . . . . . . . . ... . . . 2-

Electrostatic Discharge (ESD) . . . . . . . . . . . . . . . . . . 2-2

Static-Safe Work Station . . . . . . . . . . . . . . . . . .. 2-2

Static-Safe Practices . . . . . . . . . . . . . . . . . . . .. 2-3

Power Requirements . . . . . . . . . . .. .. . . . . . . . . 2-3

Mating Connectors . . . . . . . . . ......... . . . . . 2-3

Connecting the Detector . . . . . . . . .... .. .. . . . . 2-3

3. Operation

Features . . . ......... . . . . . . . . . . . . . . . 3-2

Operating Theory . . . ......... . . . . . . . . . . . 3-2

Measurement System Conguration .. .. .. .. .. .. .. .3-3

DC Detection mode . .. .. .. .. .. .. .. .. .. .. 3-3

Accurate DC Measurements . ................. 3-3

Zeroing the Detector . . . . . . . . . . . . .... .. .. . 3-3

Autozero ......................... 3-3

Manual Zero . . . . . . . . . . . . . . .......... 3-4

AC Detection Measurements .... .. .. .. .. ...... 3-6

Operator's Check ...................... . 3-6

Procedure . .. .. .. .. .. .. .. .. .. . .. .. .. 3-7

If the Operator's Check Fails ................. 3-8

Agilent 85025A/B/D/E Contents-1

4. Performance Tests

Equipment Required . .... .. .. .. .. .. ...

.. 4-

Return Loss P

erformance Test ................ .4-3

85025A/B/D/E Return Loss Performance Test Procedure . . . . 4-3

Specications . . ................. .. .. 4-3

Description . . . . . . . . . . . . . . . ..

... . . 4-3

Return Loss Measurement . . . . . . . . . . . . . .... 4-6

Calibrating the Scalar Network Analyzer . . . . . . . . . . 4-7

Return Loss from 40 MHz to 8 GHz (to 26.5 GHz for 85025B/E

only, to 50 GHz for 85025D only) . . . . . . . . . . ...4-7

If This Test Fails . . . . . . . . . . . . . .... . . . . . . 4-9

Frequency Response Performance Test . . . . . . . . . . . . . 4-9

Description . . . . . . . . . . . . . . . . ....... . . 4-9

Equipment Required . . . . . . . . . . . . . . . ...... 4-

Equipment Common to 85025A/B/D/E . . . . . . . . . . . . 4-

Additional Test Equipment Required for 85025A . . . .... 4-

Additional Test Equipment Required for 85025A Option 00 .4-

Additional Test Equipment Required for 85025B . . . . . ...4-

Additional Test Equipment Required for 85025D Only . . . . 4-

Additional Test Equipment Required for 85025E Only . . . . 4- 2

Specications . . . . . . . . . . . . . ... . . . . . . . . 4- 3

85025A/B/D/E Frequency Response Performance Test Procedure 4- 3

Conguring the System . . . . ... . . . . . . . . . . . . 4- 3

Characterizing the Source . . . . ..... . . . . . . . . 4- 4

Characterizing the Detector . . . . .... . . . . . . . . 4- 4

Computing the Maximum Error . ......... . . . . . 4- 4

Power Accuracy Performance Test . . . . . . . . . . . . . . . 4- 5

Specications ..... . . . . . . . . . . . . . . . . . . . 4- 5

Description .... ..................... 4- 5

Equipment Required . .... . . . . . . . . . . . . . . . 4- 6

Procedure .... .. .. .. .. .. .. .. .. .. ....4- 7

Absolute Power Accuracy in DC Mode Performance Test . . . 4- 7

Dynamic Accuracy in AC Mode Performance Test .. .... . 4-20

Power Accuracy, Alternate Procedure Using an 8350B (+ 0 dBm

maximum) . . .... .. .. .. .. .. .. .. .. . .. 4-2

Alternate Equipment . ................... 4-2

Procedure . . . ....................... 4-22

Absolute Power Accuracy in DC Mode, Alternate Procedure .. 4-23

Dynamic Accuracy in AC Mode, Alternate Procedure . . . . . . 4-24

Performance Test Record . . . . . . . . . . .......... 4-25

Contents-2 Agilent 85025A/B/D/E

5. Adjustments

6. Replaceable P

arts

How To Order Parts Fast . . . . . . . . . . .. .. .. .. . . 6-

7. Service

Repair . . . . . . . . . . . . . . . .... .. .. .. . . . 7-2

Removing the Covers . . . . . . . . . . . . . ..

... 7-2

Procedure . . . . . . . . . . . . . . . ..

...... .. 7-2

Replacing the Detector . . . . . . . . . . . .... .. .. . 7-3

Replacing the Cable Assembly . . . . . . . . . . . . . . . . 7-3

Replacing the Connectors . . . . . . . . . . . . . . . . . . 7-5

8. Detector Maintenance

Mechanical Inspection . . . . . . . ......... . . . . . 8-

Inspecting the Connectors . . . . . . . . .... . . . . . . 8-

Visual Examination . . . . . . . . . ..... . . . . . . . 8-2

Cleaning the Connectors . . . . . . . . . . ... . . . . . . . 8-2

Connector Cleaning Kit . . . . . . . . . . ... . . . . . . 8-2

Gaging Connectors . . . . . . . . . . . . .. . . . . . . . . . 8-2

Gaging Connectors to be Mated with the 85025A/B/D/E . . . . 8-3

Type-N female . . . . . ... . . . . . . . . . . . . . . . 8-3

Precision 7 mm . . . . ... . . . . . . . . . . . . . . . 8-3

Precision 3.5 mm female . . . ..... . . . . . . . . . . 8-3

9. Automated Program Listing

Automating the Frequency Response Test . . . . . . . . . . . . 9-

Cal Factor Entry Program . . . . . . . . . . . . . . . . . . 9-2

Running the Cal Factor Entry Program . . . . . . . . . . . 9-2

Detector Frequency Response Program . ... . . . . . . . . 9-3

Running the Detector Frequency Response Program . . . . . 9-3

Measurement Setup . . . . . . . . . . . . .. .. .. .. .. 9-5

Example Programs . . . . . . . . . . . . ... . . . . . . . . 9-5

Index

Agilent 85025A/B/D/E Contents-3

Figures

- . 85025A/B/D/E Detector . . ................. -2

2- . Example of a Static-Safe W

ork Station . . . . . . . . . . . . 2-2

3- . Detector Features ..

. . . . . . . . . . . . . . . . . . . . 3-2

3-2. Typical System Setup for 0.0 to 50 GHz Measurements . . . . 3-5

3-3. Operator's Check Equipment Setup . ............. 3-7

4- . Setup for 85025A/B/D/E Return Loss Test ........... 4-6

4-2. 85025A/B/E Return Loss 0.04 GHz to Maximum Frequency . . . 4-8

4-3. Frequency Response Measurement Setup . ... . . . . . . . 4- 2

4-4. Absolute Power Accuracy Test Setup . . . . . . . . . . . . . 4- 7

4-5. Power Accuracy Alternate Test Setup . . . . . . . . . . . . . 4-22

6- . Module Exchange Program . . . . . . . . . . . . . . . . . . 6-3

7- . Removing the Detector Covers . . . . . . . . . . . . . . . . 7-2

7-2. Cable Connections . . . . . . . . . . . . . . . . . . . . . . 7-5

9- . Typical Program Output . . . . . . . . . . . . . . . . . . . 9-4

Contents-4 Agilent 85025A/B/D/E

Tables

- . 85025 Series Detector Descriptions . . . . . . . . . . . . . . -

-2. 85025A/B/D/E Detector General Specications . . . . . . . . . -3

-3. 85025A Detector Specications (including Option 00 ) . . . . . -4

-4. 85025B Detector Specications . . .... .. . . . . . . . . -5

-5. 85025D Detector Specications . . ....... . . . . . . . -6

-6. 85025E Detector Specications ... . . . . . . . . . . . . . -7

-7. 85025A/B/D/E Detector Supplemental Characteristics . . . . . -8

3- . Equipment Required for Operator's Check . . . . . . . . . . . 3-6

4- . Recommended Equipment . . . . . . . . . . . . . . . . . . 4-2

4-2. 85025A/B Return Loss with Measurement Uncertainty . . . . . 4-5

4-3. 85025D Return Loss with Measurement Uncertainty . . . . . . 4-5

4-4. 85025E Return Loss with Measurement Uncertainty . . . . . . 4-5

4-5. Approximate Error Analysis at 8 GHz for 85025A/B/E Detectors 4- 0

4-6. Approximate Error Analysis for the 85025D Detector . . . . . 4- 0

6- . 85025A/B/D/E Replaceable Parts and Accessories . . . . . . . 6-2

Agilent 85025A/B/D/E Contents-5

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