HP 4342A Service manual

Errata

4342A Q-meter Operating and Service Manual

04342-90006

March 1983 Thanks to John Day who provided this scanned copy

Title & Document Type:

Manual Part Number:

Revision Date:

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MET6LoGY

JAN 21 1986

thERATING

i

.

AND

SERVICE MANUAL

434.2A.

HEWLETT

I?!!

PACKARD

COPYRIGHT AND DISCLAIMER NOTICE

Copyright - Agilent Technologies, Inc. Reproduced with the permission of Agilent

Technologies Inc. Agilent Technologies, Inc. makes no warranty of any kind with regard

to this material including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies, Inc. is not liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material or data.

CERTI FI CATI 0 N,

The Hewlett-Packard Company certifies that this instrument was

thoroughly tested and inspected and found to meet its published specifications when it was shipped Packard -Company further ments are traceable to the U.S. National Bureau

the extent allowed by the Bureau’s calibration facility.

certifies

from

the factory. The Hewlett-

that its calibration meusure-

of

Standards to

WARRANTY AND ASSISTANCE

All Hewlett-Packard products are warranted against defects in

materials and workmanship. This warranty applies for one year

from the date of delivery, or, in the case of certain major compo-

nents listed in the operating manual, for the specified period. We

will repair or replace products which prove to be defective during

the warranty period provided they are returned to Hewlett-

Packard. No other warranty is expressed or implied. We are not liable for consequential damages.

Service contracts or customer assistance agreements are available for Hewlett-Packard products that require maintenance and re-

pair on-site.

For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided at the back of this manual.

OPERATING AND SERVICE

MODEL 4342A

Q METER

SERIAL NUMBERES COVERED

This manual applies directly to Model 43428 Q Meter with serial prefixed 12125. Backdating changes in SectionVII cover instruments with serials 12125-00590 and below. Instruments with higher serial prefix will

be covered in an Updating Manual Supplement at the

first of the manual.

MANUAL

This manual cover-es Option 001 instruments as well as the standard instrument.

aCOPYRIGHT: YOKOGAWA-HEWLETT-PACKARD, LTD., 1970

9-1, TAKAKURA-CHO, HACHIOJI-SHI, TOKYO, JAPAN

Manual Part No. 04342-90009 Microfiche Part No. 04342-90059

OPTIONS COVERED

Printed: MAR. 1983

HEWLETT PACKARD

Table

of Contents

Model 4342A

TABLE OF CONTENTS

Section

GENERAL INFORMATION

I

Title Page

...................................

l-l. Introduction.. .......................................

1-3.

How the 4342A Measures

l-8. Instruments Covered by Manual

1-13.

Specifications .......................................

1-15. Accessories Supplied

1-17. Accessories Available l-19. Options..

II INSTALLATION

2-l. Introduction 2-3. Initial Inspection

...........................................

.........................................

.....................................

2-4. Mechanical Check 2-6.

Performance Check 2-8. Damage Claim 2-11. Storage and Shipment

.............................

.......................

................................

............................... I-3

..............................

............................. 2-I

.................................

2-12. Packaging .....................................

2-13. Environment 2-14.

2-15.

2-16.

III OPERATION

3-l. 3-3.

Power Connection

Line Voltage Power Cable

........................................................................................

Introduction

Panel Controls, Connectors and Indicators

3-5. Q Measurement General

...................................

....................................

...................................

.............................. 3-l

3-8. Go/No-Go Function ..................................

3-10. Measurement Terminals 3-12. How to Connect Unknown

..............................

3-14. Measurement Parameters and Connection Methods 3-16. 3-18. 3-20. 3-22. 3-24.

Direct Method Limitations Expansion of Measurement Ranges

Capacitance Measurement

Resistance Measurement

High Q Measurement

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

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

........................

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

3-26. Supplemental Equipment Used in Parallel

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

.........................

3-30. 3-31.

and Series Methods

Basic Q Meter Measurements

Quality Factor and Inductance

Measurements (Direct Connection) 3-33. Q Measurement 3-35.

dQ Measurement

3-37. Inductance Measurement

3-39. 3-41. 3-42. 3-45.

Inductance Measurement (at a desired frequency).

Measurement Requiring Corrections

Effects of Distributed Capacitance

Measuring Distributed Capacitance

(Preferred Method)

3-47.

Measuring Distributed Capacitance

(Approximate Method, Cd IlOpF)

3-49. Correction for Q

3-55.

Parallel and Series Connection Measurement Methods

................................

...............................

........................

................... 3-13

.........................

...............................

3-56. General .......................................

3-60. 3-64.

Parallel Measurements

Additional Error Discussion

...............................

3-65. High Inductance Measurement 3-67. 3-69. 3-71.

Low CapacitanceMeasurement (~45OpF) ..........

High Resistance Measurement Dielectric Measurement

...................

....................

................... 3-20

........................

.............

...............

........... 3-11

................

............

1-I

l-l

l-2

l-3 1-3

l-3 2-l

2-i 2-l

2-I i:: 2-l

2-I i-t

-

2-1

;-;

-

3-l

3-l 3-5

3-5

...... 3-5

3-6 3-6

3-11

3-11 3-12

3-12

.. 3-13

3-13 3-14 3-15

3-16

... 3-1’7

3-17 3-17

3-18

3-19 3-21

Model 43426 Table of Contents

Section Title Page

3-73. Series Measurements ................................

3-23

3-74. Low Inductance Measurement .................... 3-23

3-76. High Capacitance Measurement (>450pF) .........

3-24 3-78. Self-resonant Frequency Measurement

of High Capacitors .......................... 3-24

3-80. Low Resistance Measurement

....................

3-26

IV THEORY OF OPERATION ................................... 4-l

4-l.

4-3.

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

Q Determination and Measurement ..................... 4-l

4-6. Simplified Block Diagram ............................. 4-l

4-8. Block Diagram Description ...........................

4-l

4-10. Oscillator and Impedance Converter (AlAl) ....... 4-l

4-12. 4-14. ALC Amplifier (P/O A8)

4-16. Q/AQ Range Attenuator (A3) .....................

RF Power Amplifier (AlA2) ..................... 4-l

........................

4-2

4-2 4-18. Tuning Capacitor and Injection Transformer (A2). .. 4-2 4-21. 4-24. DC Amplifier (A6) 4-26. 4-28. Circuit Details

4-29. LC Oscillator (P/O AlAl) .......................

RF Amplifier and Detector (A5) .................. 4-2

Q Limit Selector (A7) ...........................

..............................

......................................

4-2

4-2 4-31. Impedance Converter (P/O AlAl) and RF

Power Amplifier (AlA2) .... 4-3

4-33. 4-35. Q Range Attenuator (A3) 4-37.

ACL Amplifier (P/O A8) ........................ 4-3

........................

4-3

Impedance Converter, RF Amplifier

and Detector (A5)

...... 4-3

4-39. DC Amplifier (A6) .............................. 4-3

4-41. Q Limit Selector (A7)

4-43. Power Supply (P/O ~8)

........................... 4-3

.........................

4-3

V MAINTENANCE

5-l.

Introduction ......................................... 5-l

............................................

5-3. Test Equipment Required ............................. 5-l

5-5.

Q Accuracy Considerations ........................... 5-l

5-7. Option .............................................. 5-l

5-9. Performance Checks 5-11. Frequency Accuracy Check.. 5-12. 5-13.

QRange Check.. ............................... 5-3

AQ Range Check ............................... 5-4

5-14. Capacitance Accuracy Check 5-15. Q Limit Operation Check

.................................

....................

........................ 5-5

5-16. Adjustment and Calibration Procedures ................

5-18. 5-19. Oscillator Level Adjustment

Power Supply Adjustment

........................

.....................

5-20. Oscillator Frequency Adjustment ................. 5-8

5-21.

5-22. 5-23. Frequency Response Adjustment 5-24. Q Limit Selector Adjustment 5-25. Option 001 Maintenance Instructions

Q Voltmeter Adjustment ........................ 5-9

Q Analog Output Adjustment .....................

.................

.....................

...................

5-27. Option 001 Performance Checks ..................

5-29. Option 001 Calibration and Adjustment Procedures . 5-13 5-31.

Dial Re-stringing Instructions .........................

5-34. Frequency Dial ................................. 5-14

5-35.

L/C Dial

......................................

5-36. AC Dial .......................................

5-37. Troubleshooting Guides ...............................

5-39. High Frequency Line Noise 5-40.

Operating in a Strong Electromagnetic Field .......

......................

5-41. Operating in High Humidity Environment .......... 5-18

5-l

5-3 5-3

5-4 5-8

5-8 5-8

5-10

5-11

5-12 5-12

5-14 5-14

5-14 5-18 5-18 5-18

. .

111

Table of Contents

List of Tables

Model 4342A

Section

5-42. 5-43.

5-44. 5-45.

5-46.

Elementary Troubleshooting Guide

Meter Zeroing Troubles ........................

Incorrect Q Meter Indication Low Q Indication in High Frequency

Faulty Q Limit Operation

VI REPLACEABLE PARTS

6-l.

Introduction.. ....................................... 6-l

Title

.................................... 6-l

6-6. Ordering Information .................................

VII MANUAL CHANGES AND OPTIONS

7-1. 7-3. 7-5.

Options

Special Instruments .................................

Manual Changes .....................................

............................................. 7-l

7-7. Later Instruments 7-8.

7-9.

VIII CIRCUIT DIAGRAMS

Earlier Instruments ............................

Option 001 Instruments .........................

.......................................

..........................

..............................

8-l. Introduction .........................................

8-4.

APPENDIX OPTION 001

I II Manual Changes III

GeneralNotes

.......................................

........................................ A-l

Replaceable Parts

Circuit Diagrams

................................... A-l

.....................................

....................................

Page

.....................

5-18 5-18

..................... 5-18

Measurements

.......... 5-19

....................... 5-19

A-l A-2

6-l 7-l 7-l

7-l 7-l

8-l

Number

l-l. l-2.

2-l.

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

3-4. 5-l.

5-2. 5-3. 5-4.

5-5. 5-6. 5-7. 5-8. 5-9.

6-l. 6-2.

7-l.

LIST OF TABLES

Title

Specifications Accessories - Typical Values

.......................................

.........................

AC Line Fuse .......................................

Methods of Connecting Unknown .......................

16451A (4342A-KOl) Typical Characteristics

............ 3-21

Formulas for Calculating Q and Impedance Parameters

from Parallel and Series Measurements

Formulas Relating Series and Parallel Components

.......... 3-27

...... 3-27

Recommended Test Equipment ........................

Q Correlation Factors

Frequency Accuracy Check

............................... 5-l

........................... 5-2

QRange Check ......................................

Capacitance Accuracy Check Adjustable Components

Frequency Adjustment. Frequency Accuracy Check (Option 001) Frequency Adjustment (Option 001).

List of Reference Designators and Abbreviations

.......................... 5-5

............................... 5-7

............................... 5-8

................

.................... 5-13

........ 6-l

Reference Designation Index ..........................

Backdating Changes

..................................

Page

1-2

l-3 2-l

3-10

5-o

5-3

5-12

6-3 7-l

iv

A-l. A-2.

Reference Designation Index for Option 001 (Al Al Ass’y). . Reference Designation Index for Option 001 (A5

Ass’y)

....

A-3 A-5

Model 4342A List of Illustrations

LIST OF ILLUSTRATIONS

Number Title

l-l. 3-l.

3-2. 3-3. 3-4.

3-5. 3-6. 3-7. 3-8. 3-9.

Model 4342A Q Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Panel Controls

................................

Rear Panel Controls and Connectors Measurement Terminal Circuit Inductance Measurement Ranges vs. Frequency

Ranges of Measurable Resistance

Zeroing Procedure

...................................

Distributed Capacitance in Direct Connection ........... 3-11

Distributed Capacitance Circuit Model Typical Variation of Effective Q and

Inductance with Frequency ....... 3-14

3-10.

3-11. 4-l. Series Resonant Circuit

4-2. 4-3.

5-l.

5-2. 5-3. 5-4.

5-5.

5-6. 5-7. 5-8. 5-9. 5-10. 5-11.

5-12. 5-13.

Correction Chart for Distributed Capacitance ........... 3-14

Residual Parameters .................................

..............................

Model 43426 Simplified Block Diagram Constant Voltage Injection System

Q Range Check

AQ

Range Check

......................................

.....................................

Capacitance Accuracy Check

Model 4342A Adjustment Locations Model 4342A Assembly Locations Voltmeter Adjustment

................................ 5-10

Frequency Response Adjustment Frequency Dial Restringing

Main C Dial Restringing

AC Dial Restringing

.............................. 5-16

..................................

Tuning Capacitor Disassembly (top view) ............... 5-19

Troubleshooting, Oscillator Section

Troubleshooting, Voltmeter Section

Page

l-l 3-2

...................

.......................

(direct method)

......................

.........

3-4

3-5 3-6

3-7

3-8

................. 3-13

3-17

4-o

.................

.....................

..........................

....................

...................... 5-6

......................

........................... 5-15

4-O

4-2

5-2

5-3 5-4 5-6

5-11

5-17

................... 5-21

...................

5-19

6-l.

6-2. 6-3. 6-4.

Exploded View of Oscillator Ass’y

.....................

Exploded View of Tuning Capacitor Ass’y Exploded View of Q Range Attenuator Ass'y Exploded View of Frequency Multiplier, Over Limit

Indicator, and Frequency Scale Indicator

6-5. 6-6.

6-7. 6-8.

7-1. A7 04342-7707 .......................................

7-2. All 04342-7711 7-3.

8-1. 8-2. 8-3.

Exploded View of Main and Vernier Capacitor Exploded View of Oscillator Lever Ass’y

Exploded View of Rear Panel

Exploded View of Handle Section

Partial Schematic of Power Supply

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

Schematic Diagram Notes . .

Function Overall Block Diagram

Oscillator

Ass'y Al,

Q Range Attenuator

..........................

......................

.................... 7-5

. . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

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

Power Supply & ACL Amplifier Ass’y A8,

Frequency Multiplier & Over Limit Indicator

.............. 6-24

.............

..........

Dial Ass’y

...... 6-28

...............

Ass'y A3,

Ass'y

AlO.. 8-5

6-22 6-26

6-27

6-29 6-30

6-32

7-2

List of Illustrations

Model 4342A

Number Title Page

8-4. Tuning Capacitor Ass’y A2, QRange Attenuator Ass’y A3,

8-5.

8-6. Q Limit Selector Ass’y A7 8-7. A-l

A-2.

Impedance Converter Ass’y A4,

Meter Scale Indicator Ass’y All . . . . . . . . . . . . . . . . . . . . . . . 8-7

Q Range Attenuator Ass’y A3, Impedance Converter, RF

Amplifier &Detector Ass’y A5, DC Amplifier Ass’y A6,

Meter Scale Indicator Ass’y All . . . . . . . . . . . . . . . . . . . . . . 8-9

Frequency Multiplier & Over Limit Indicator Ass’y A 10 . . 8-11 Power Supply & ALC Amplifier Ass’y A8

Oscillator Ass’y Al (Option 001) . . . . . . . . . . . . . . . . . . . . . .

Impedance Converter, RF Amplifier & Detector

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . .

Ass’y A5 (Option 001) . . . . . A-9

8-13

A-7

Model 4342A

Section I

Paragraphs l-1 and 1-2

SECTION I

GENERAL INFORMATION

l-l. INTRODUCTION.

1-2.

The HP Model 4342A Q Meter is designed

to meet the requirements for making easy and

accurate quality factor measurements in the

laboratory, on the production line, or in QA incoming inspection areas. The direct read-

ing,expanded scale of the 4342.4 permits measurement of Q from 5 to 1000 and the reading of very small changes in Q resulting from variation in test parameters. The long frequency dial scale and the pushbutton range

selector continuously cover the frequency range of 22kHz to 7OPlHz (in seven - l/3 de-

cade steps) and permit setting the frequency

to an accuracy of 1.5% with 1% resolution. The calibrated long-scale capacitance dials

permit reading the capacitance of the

tuning capacitor at an accuracy of 1% and provides the capability for varying the

capacitance with O.lpF resolution on the vernier scale. Inductance of sample can be

read directly from the inductance scale ad-

jacent to the capacitance scale at seven

specific frequencies by setting the frequency dial to the "L" point on each frequency range.

Flat oscillator output, automatically levelcontrolled over the entire frequency ranges, is a feature of the 4342A.

This advantage

obviates the necessity for frequent oscil-

lator level adjustments to maintain the out-

put level constant or the use of a

specially

matched fragile thermocouple level meter.

The high reliability of the instrument and ease of operation are the direct results of these measurement advancements in the 4342A.

For determing the resistance, reactance, or quality factor of capacitance and inductance samples in the high frequency region, the 4342A is a most versatile measuring instru-

ment. The 4342,1 can measure the dissipation

factor and dielectric constant of insulating

materials, coefficient of coupling, mutual

inductance, and the frequency characteristics

of transformers. Accessories which extend

the measurement capabilities, designed for

Figure l-l. Model 4342A Q Meter.

Section I Paragraphs 1-3 to l-12

Model 4342A

user convenience, have broad applications

in testing components and electronic materials, in physical and chemical research, and in related scientific fields.

Pushbutton operation of frequency range and

Q/AQ range selection provides for straight-

forward measurement. meter scales, multipliers are used, and reading speed.

l-3. How The 4342A Measures.

l-4. The Q Meter is basically composed of a

stable, variable oscillator, a tuning circuit

for taking resonance with an unknown sample,

and a high input impedance RF voltmeter connected across the variable capacitor which is

a section of the tuning circuit. To measure the quality factor of a sample, a

stable oscillator signal is injected into the

series tuning circuit composed of the vari-

able capacitor and the unknown (inductor). At the tuned frequency, the RF voltmeter

(called Q voltmeter) indicates a peak value in the signal level increase (resonance) and is proportional to the quality factor of the sample measured. signal with a low output impedance and by

measuring the signal level of the series re-

sonant circuit with a high impedance volt-

meter, the quality factor of the unknown

samnle can be accurately determined at the resonant frequency.

parameters of the sample can be measured

(directly and indirectly) as factors of the resonant frequency and the tuning capacity

which can be read from their respective dial

scales. l-5. For accurate measurements, the 4342A

employs a unique constant voltage injection system and a low output impedance injection transformer. The oscillator signal is automatically leveled by an ALC loop to provide

the constant injection voltage required by

the Q range in use. of an oscillator level control or the fragile

thermocouple level meter (as used in tradi-

tional Q Meters).

transformer along with the high quality low

loss tuning capacitor contribute minimal additional loss to the measurement circuit (resonant circuit) and greatly improve the Q ac-

curacy in high Q measurements.

l-6. High stability of the Q voltmeter virtually eliminates the need for Q-zero adjustments in routine measurements. Troublesome

zero settings prior to each adjustment are thus eliminated, ensuring simple and rapid operation. Accurate determination of Q changes

l-2

frequency dials, and frequency

Automatic indication of

adding to the simplicity

By injecting an oscillator

Additionally, various

This obviates the need

The unique injection

in delta-Q measurements can be obtained in all

Q ranges by using the expanded resolution

(X10) capability.

l-7. The unique Q Limit selector is especially useful in Go/No-Go checking on the

production line. The high response speed of

the Go/No-Go indicator (compared to using a

meter pointer deflection method) permits

faster Go/No-Go testing. For even easier testing, external indicating devices may be

remotely controlled by the Go/No-Go output

signal (on the rear panel).

1-8. INSTRUMENTS COVERED BY MANUAL.

l-9. Hewlett-Packard uses a two-section

nine character serial number which is marked

on the serial number plate (Figure 1-2) attached to the instrument rear panel.

first four digits and the letter are the serial prefix and the last five digits are the suffix. The letter placed between the two sections identifies country where instrument was manufactured.

all identical instruments; it changes only

when a change is made to the instrument.

suffix, however, and is different for each instrument. contents of this manual apply to instruments with the serial number prefix(es) listed under SERIAL NUMBERS on the title page.

l-10. An instrument manufactured after the

printing of this manual may have a serial number prefix that is not listed on the title

page.

dicates that the instrument is different from those described in this manual. The manual for this new instrument may be accompanied by a yellow Manual Changes supplement or have a different manual part number. This supplement contains plains how to adapt the manual to the newer

instrument. l-11. In addition to change information, the

supplement may contain information for correcting errors (called Errata) in the manual.

To keep this manual as current and accurate

as possible, Hewlett-Packard recommends that you periodically request the latest Manual Changes supplement. The supplement for this

manual is identified with this manual's title page.

are available from ltewlett-Packard. If the serial prefix or number of an instrument is lower than that on title page of this manual, see Section VII Manual Changes.

1-12.

number prefix that is not listed on the title page or in the Manual Changes supplement,

contact your nearest Hewlett-Packard office.

This unlisted serial number prefix in-

Complimentary copies of the supplement

For information concerning a serial

The prefix is the same for

is assigned sequentially

"change information" that ex-

The

Model 4342A

Paragraphs l-13 to l-22

Section I

1-13. SPECIFICATIONS. 1-14. Complete specifications of the Model

4342A Q Meter are given in Table l-1. These

specifications are the performance standards or limits against which the instrument is tested. The test procedures for testing the instrument to determine if it meets its specifications are covered in Section V Mainte-

nance Paragraph 5-9 Performance Checks. When the 4342A Q Meter is shipped from the

factory, it meets the specifications listed in Table l-l.

l-15. ACCESSORIES SUPPLIED.

1-16. Fuses (HP Part No. 2110-0339 and 2110-

0044), the Operating and Service Manual, and a power cord are furnished with the 4342A.

One of four types of power cords (HP Part No.

8120-1703, -0696, -1692 or -1521) is fur-

nished depending on the instrument destin-

ation. All accessories supplied are packed in the instrument carton.

l-17. ACCESSORIES AVAIALABLE. l-18.

devices which extend or enhance the measure-

ment capabilities of the 4342A.

ing accessories are available for use with the 4342A Q Meter:

Accessories are specially designed

The follow-

16014A Series Loss Test Adapter:

The 16014A Series Loss Test Adapter is a special terminal adapter designed for measuring low impedance components,

low-value inductors and resistors, and

also high value capacitors.

adapter adds convenience in connecting

components in series with the test circuit of the 4342A Q Meter.

sists of a teflon printed-circuit base on which are mounted binding posts to accept the supplemental inductors,

series terminals for the unknown.

16451A Dielectric Test Adapter (4342A-KOl):

The 16451A Dielectric Test Adapter is a test fixture for measuring the dielectric constant or dielectric loss angle (tan 6) of insulating materials. The 16451A has a pair of precision

variable electrodes (one side is fixed) which hold the sample and which op-

erate similar to a micrometer to per-

mit direct reading of electrode spac-

ing. This test adapter is directly attached to 4342A measurement terminals.

Typical performance, characteristics, and additional information regarding these accessories are given in Table l-2.

and a pair of low-inductance

The

It con-

16470 Series Supplemental Inductors:

A range of 20 inductors (model num-

bers 16471A to 1649OA), which can be

supplied separately or as a set, are available for use with the 4342A Q

Meter. reference devices when measuring the RF characteristics of capacitors, re-

sistors, or insulating materials.

4342A option 001 instruments, the

Model 16465A Inductor is additionally

available. terminals including a guard terminal for stabilization of measurements.

16462A Auxiliary Capacitor:

The 16462A Auxiliary Capacitor is de-

signed to extend the Q and L measurement capabilities of the 4342A. It is especially useful when measuring small inductors at low frequencies.

These inductors are useful as

These inductors have three

For

1-19. OPTIONS.

l-20. An option is a standard modification performed in the instrument to meet a special requirement desired by a user.

strument model is ordered with an option number, the corresponding optional parts are installed in/or packaged with instrument at the factory. lower measurement frequency range is avail-

able for installation in the 4342A.

l-21.

l-22.

frequency range, 1OkHz to 32MHz, instead of the standard frequency range of 20kHz to 70MHz. All specifications that apply to Option 001 instruments are given in Table 1-1.

Option 001. The 4342A Option 001 covers a lower

An Option for obtaining a

When an in-

1-3

Section I Table l-l

Model 4342A

Table l-1. Specifications (Sheet 1 of 2).

FREQUENCY CHARACTERISTICS

Measurement Frequency Range:

22kHz to 70MHz in 7 bands (22 to 70kHz, 70 to 220kHz,

700 to 2200kHz, 2.2 to 7MHz, 7 to 22MHz, and 22 to 70MHz).

Frequency Dial Accuracy:

21.5% at 22kHz to 22MHz, 22%

at 22MHz to 70MHz,

-cl%

at "L" point on frequency dial.

Frequency Dial Resolution:

Approximately 21%.

Q MEASUREMENT CHARACTERISTICS

Q Range:

5 to 1000 in to 100, 50 to 300, and 200 to 1000).

Q Tolerance:

quency 22kHz - 30MHz 30MHz - 70MHz

:

5 - 300

300 - 600

600 - 1000

Q Resolution:

Upper scale: 1 from 20 to

Lower scale: 0.5 from 5 to

AQ Range:

0 to 100 in 4 ranges, 0 to 3, 0 to 10, 0 to 30, 0 to 100.

4 ranges (5 to 30, 20

% of indicated value

(at 25'C)

27% 210% 210% 215% 215% ?20%

220 to 700kHz,

100,

30.

AQ Tolerance:

210% of full scale.

AQ Resolution:

Upper scale:

Lower scale:

I

NDUCTANCE MEASUREMENT CHARACTERISTICS

L Range:

0.09nH to 1.2H, direct reading for seven specific frequencies as marked at the frequency dial "L" scale point and selected by the frequency range switches.

L Accuracy:

?3%

after compensation for residual

inductance (approx. 1OnH).

TUNING CAPACITOR CHARACTERISTICS

Capacitance Range:

Main dial capacitor: 25 to 470pF Vernier dial capacitor:

Capacitance Dial Accuracy:

Main dial: *l% or 1pF whichever is

Vernier dial: +O.lpF.

Capacitance Resolution:

Main dial: 1pF from 25 to 30pF,

Vernier d ial: O.lpF.

0.1 from 0 to 10,

0.05 from 0 to 3.

-5 to +5pF

greater.

2pF from 30 to 200pF, 5pF from 200 to 470pF.

1

l-4

Model 4342A Section I

Table l-1

Table 1-l.

REAR PANEL OUTPUTS

Frequency Monitor:

17OmVrms min. into SOR.

Q Analog Output:

1V +-50mV dc at full scale, proportional to meter deflection, output impedance approx. 1kR.

Over Limit Signal Output:

Single pole relay contact output,

one side grounded, relay contact

capacity 0.5.4/15VA.

Over Limit Display Time:

Switch-selectable, lsec. or

continuous.

GENERAL

Operating Temperature Range:

o"c to 50°C. Warm-up Time: 30 minutes. Power: 115 or 230V +lO%,

approx. 25VA. Weight: Approx. 31 lbs (

Specifications (Sheet 2 of 2).

48 - 440Hz,

4kd.

OPTION 001:

This option covers a frequency range

of 10kHz to 32MHz. Specifications are identical with those of the standard model except as noted below.

Oscillator Frequency Range:

1OkHz to 32MHz in 7 bands (10 to 32kHz, 32 to lOOkf-Iz, 100 to 320kHz, 320 to lOOOkHz, 1 to 3.2MHz, 3.2 to IOMHz, and 10 to 32MHz).

Frequency Accuracy:

i-1.5%

at 1OkHz to 1OMllz. +_2% at 1OMllz to 32MHz. 21% at "L" point on frequency dial.

Q Tolerance: % of indicated value

(at 25'C)

1 5 - 300 1 300 - 600 1 600 - 1000 1

I 27% I ?lO% I

?15%

DIMENSIONS:

NOTE : DLL(ENSIW IN INCHES AND OALLIYETERSI.

I

:& (41

Accessories Furnished:

Power Cord

Accessories Available:

16471A through 16490A,

and 16465A

Supplemental 16462A Auxiliary Capacitor. 16014A Series Loss Test Adapter. 16451A Dielectric Test Adapter.

Extender Board 15pin

(Part No. 5060-4940).

Extender Board 6pin

(Part

No.

5060-0651).

Inductors.

l-5

Section I Model 43426

Table l-2

Table l-2. Accessories - Typical Values.

16471A - 1649OA, 164656 Supplemental Inductors

Approx. resonant frequency

Model Inductance

16471A 130

mH

for tuning capacitance of

400pF

lOOpF 50pF

22 40 62 kHz below 300( 30 kHz)*

16472A 52 mH 35 70

Q Limit

100 kHz below 300( 50 kHz)* 8

Capaci-

tance

(PF)

16473A 25 mH 50 100 140 kHz below 300( 70 kHz)*

16474A 10 mH 80 160 220 kHz below 300(100 kHz)* 8

l6475A 5.2mH 110 220 300 kHz below 300(150 kHz)* 16476A 2.8mH 150 300 420 kHz below 300(200 kHz)* 8 16477A 1 mH 250 500 700 kHz below 300(300 kHz)*

l6478A 520 /JH 350 700 1000 kHz below 300(500 kHz)* 8 16479A 250 PH 500 1000

1400 kHz below 300( lMHz)* 7 16480A 100 IJ.H 800 1600 2200 kHz below 300( lMHz)* 7 16481A 56 PH ** 1 2.2 3.lMHz below 300( lMHz)* 7 16482A 28

FH

1.5 3 4.2MHz below 3OO(l. SMHz)* 16483A 10 /JH 2.5 5 7 MHz below 300(2. SMHz)* 6 16484A 5.21~.H 3.5 7 10 MHz below 300( lOMHz)*

16485A 2.51~.H 5 10 14 MHz below 300( lSMHz)* l6486A 1 PH 8 16

22 MHz below 300( 20MHz)* 6

8

7

6 6

lOOpF 35pF

16487A 0.52pH 22MHz 35MHz below 300( 35MHz)* 6 16488A 0.28~~ 30MHz 5OMHz below 300( SOMHz)* 16489A

0.1 IJ.H 5OMHz 70MHz below 300( 7OMHz)*

16490A 0.07pH 6OMHz 1 OOMHz below 300( 70MHz)*

400pF

lOOpF 50pF

**16465A 630 mH 10 20 28 kHz below 300( 12 kHz)*

* The frequency in parentheses indicates frequency at which maximum Q factor is obtained

(for the respective inductor).

** Approx. resonant frequency for tuning capacitance of 450pF.

*** For 43426 Option 001 only. use

16462A

16014A Series Loss Test Adapter

Auxilialy

Capacitance Range: 300pF to 2700pF in steps

of 300pF. 10 ranges including OFF position.

Capacitance Accuracy: +l% on all ranges.

5000 at 20kHz on all ranges.

Q:

Residual inductance: approx. O.luH.

Residual capacitahce at OFF position:

approx. 23pF.

Useable Frequency Range: 1OkHz to 10MHz.

Capacitor

Measurable Capacitance Range: 450pF to 0.225uF Measurable Resistance Range: 1Om.Q to 80R at

lOMHz, 4R to 8kR

Stray Capacitance Between Unknown Terminals:

approx. 3pF.

Insulation Resistance between Unknown Terminals

approx. 1OMR at 1MHz.

Residual Inductance: approx. 30nH

16451A Dierectric Test Adapter

(refer to Page 3-21 Table 3-2).

at

1OkHz.

4

3

2

9

l-6

Model 4342A

Section II

Paragraphs 2-l to 2-16

SECTION II

INSTALLATION

2-l. INTRODUCTION 2-2. This sectioncontains informationfor unpacking,

inspection, repacking, storage, and installation of the

Model 4342A. 2-3. INITIAL INSPECTION

2-4. MECHANICAL CHECK

2~5. If damage to the shipping carton is evident, ask that the carrier’s agent be present when the instrument is unpacked. Inspect the instrument for mechanical damage. Also check the cushioning material for signs of severe stress.

2-6. PERFORMANCE CHECKS 2-7. The electrical performance of the Model4342A

should be verified upon receipt. Performance checks suitable for incoming inspectionare given in Section V, Maintenance.

2-8. DAMAGE CLAIMS 2-9. If the instrument is mechanically damaged in

transit, notify the carrier and the nearest Hewlett-

Packard field office immediately. A list of field offices is on the backof this manual. Retain the shipping carton andpadding material for the carrier’s inspection.

The fieldoffice will arrange for replacement or repair of your instrument without waiting for claim settle-

ments against the carrier.

2-10. Before shipment this instrument was inspected and found free of mechanical and electrical defects. If there is any deficiency, or if electrical performance is not within specifications, notify your nearest Hewlett-Packard Sales and Service Office.

sq in. bursting test) with a layer of excelsior about 6 inches thick packed firmly against all surfaces of the instrument.

2-13. ENVIRONMENT. Conditions during storage

and shipment should normally be limited as follows:

a. Maximum altitude, 20,000 feet b. Minimum temperature, -40” F (-40” C)

C.

Maximum temperature, 167” F (75°C)

2-14. 2-15.

from

and Line frequency from 50 to 400Hz. A slide switch on the rear panel permits quick conversion for

operating from either voltage. Insert a narrow- blade

screwdriver in the switch slot and slide the switch

the right for 115-volt operation (“115” marking exposed) or to the left for 230-voltoperation (“230” marking exposed). The Model 4342A is supplied with 115volt fuse; for 230-volt operation, be sure to replace this fuse with that listed in Table 2-I.

POWER CONNECTION LINE VOLTAGE. The Model 4342Aoperates

either 115 or 230 volt (*lo%) ac line voltage

Table 2-l. AC Line Fuse

Conversion 115-volt

Slide Switch Right

(“115’)

AC Line Fuse 0.6 amperes

Slow-Blow

2110-0339

230-volt Left

(“230”)

0.3 amperes Slow-Blow 21 lo-0044

to

2-11. STORAGE AND SHIPMENT

2-12. PACKAGING. To protect valuable electronic equipment during storage or shipment always use the best packaging methods available,

Packard field office can provide packing material such as that used,for original factory packaging. Contract packaging companies in many cities can provide dependable custom packaging on short notice. Here are a few recommended packaging methods :

a. RUBBERIZED HAIR.

of instrument with protective wrapping paper.

Pack instrument securely in strong corrugated container (350 lb/sq in. bursting test) with 2inch rubberized hair pads placed along all surfaces of the instrument. Insert fillers between pads and container to ensure a snug fit.

b. EXCELSIOR. Cover painted surfaces of instru-

ment with protective wrapping paper. Pack in-

strument in strong corrugated container (350 lb/

Cover painted surfaces

Your Hewlett-

CAUTION

To avoiddamage to theinstrument, before connecting the power cable, set the 115/

230-volt switch for the line voltage to be

used.

2-16. POWER CABLE, To protect operating personnel, the National Electrical Manufacturers Association (NEMA) recommends that instrument panels and cabinets be grounded. Accordingly, the Model 4342A

is equipped with a detachable three.-conductor power cable which, when plugged into an appropriate recepta-

cle, grounds panel and cabinet. The offset pin of the three-prong connector is the ground pin. Proceed as follows for power cable installation.

a. Connect flatplug (3-terminal connector) to LINE

jack at rear of instrument.

b. Connect plug (a-blade with round grounding pin)

to J-wire (grounded) power outlet. Exposed

2-l

Section II

portions of instrument are grounded through the round pin on the plug for safety; when only 2blade outlet is available, use connector adapter (HP Part No. 1251-0048). Then connect short wire from slide of adapter to groundto preserve

the protection feature.

Model 4342A

2-2

Model 4342A

Section III

Paragraphs 3-1 to 3-9

SECTION III

OPERATION

3-1. INTRODUCTION.

3-2. quality factor of inductors from 5 to 1000 and, resistance, and the dielectric constant of

insulating materials over the frequency range of 22kHz to 70MHz. instructions and information necessary for operating the 4342A Q Meter.

Fundamental operating procedures and general techniques for measuring various parameter values of the unknown directly and indirectly

by using accessories appropriate to the

characteristics of the unknown are also outlined in this section.

3-3. PANEL CONTROLS, CONNECTORS AND

3-4. Control panel, top terminal deck, and rear panel features of the 4342A are described in Figures 3-1 and 3-2. The numbers in the illustrations are keyed to the descriptive items for each figure. Other detailed information about the functions of the

panel controls and connectors is provided in paragraphs 3-8 through 3-11.

3-5. Q MEASUREMENT-GENERAL. 3-6. To complete the measuring circuit, the

Model 4342A requires the connection of an inductor to the measurement COIL terminals.

This circuit is then used to establish a resonance, either by setting the frequency controls to a predetermined frequency and varying the tuning capacitor, or by presetting the tuning capacitor to a desired value and adjusting the frequency controls. Reso-

nance is indicated by maximum deflection of

the panel Q meter. The Q value of the sample is proportional to Q meter deflection at the resonant frequency.

3-7. The "indicated Q" which is the Q meter reading at resonance is called the "circuit Q" because it includes all the additive

losses inherent in the instrument including

The 4342A Q Meter can measure the

in addition, capacitance, inductance and

This section provides the

INDICATORS.

those in the tuning capacitor, the Q volt-

meter input resistance, output resistance of

the oscillator signal injection circuit, and contact resistances of the measurement termi-

nals.

ing or "circuit Q" is called "indicated Q" throughout the balance of this manual. The

"effective Q", which is dependent only on the

inherent loss of the sample and can be meas-

ured only by an ideal measuring circuit, is

somewhat greater than the "indicated Q".

However, the "indicated Q" can

the "effective Q", by reducing instrument losses as much as is possible. So, in most

instances, these Q values can be deemed to be the same. The 4342A employs a Constant Voltage Injection System obviating the use of a

thermocouple level meter (the resistance of

thermocouple device would contribute additional losses to the measuring circuit) and the coupling resistor used in traditional Q

meters.

jection transformer, the improved operating performance of the Q voltmeter, and the pre-

cision tuning capacitor which has extremely

low loss over a wide frequency range minimize the difference between the "indicated Q" and "effective Q".

3-8. GO/NO-GO FUNCTION. 3-9. The 4342.4 Go/No-Go function provides

an annunciation when the measured Q value exceeds a reference value. outputs, the OVER LIVIT lamp display and a relay contact output (rear panel) are available. The OVER LIMIT indicator lamp lights and the relay is energized when the measured

Q value is over the reference value set by

the front panel Q LIMIT control. Annunciation time can be selected to occur at either 1 second intervals or to be continuous by the rear panel OVER LIMIT DISPLAY TIME switch,

When the switch is set to its 1 set position and the Q meter indication goes over the pre-

set Q limit control value, the OVER LIMIT lamp lights once for 1 second. In the con-

tinous mode, during the entire time that the Q value meter deflection exceeds the preset value. Relay contact output follows in the same manner.

To avoid ambiguity, the Q meter read-

approximate

The low output impedance of the in-

Two annunciation

the lamp stays continuously lit

3-l

Section III Figure 3-l

Model 4342A

3-2

LINE PUSH ON/OFF Switch:

1. power on/off switch.

FREQUENCY RANGE Selector: These push- The frequency is read from FREQHENCY

2. buttons select the desired measurement scale @and the multiplier indicator

frequency range from among the seven ranges covering 22kHz to 7OMllz (10kHz to 32MHz for Option 001). The inductance range which may be measured directly at the "L" scale frequency point on the selected frequency range

is labeled on the panel adjacent to the pushbuttons.

Figure 3-l.

Instrument

Front Panel Controls (Sheet 1 of 2).

3. FREQUENCY Dial Control: This dial wheel varies the measurement frequency

as well as the FREQUENCY dial scale@.

0

Q LIMIT Control:

4. sets the low limit of the Q value for

Go/No-Go checks. The Q LIMIT setting dial scale numbers are related to

meter deflection (% of full scale).

This dial control

Model

4342A

Section III

Figure 3-l

Frequency Multiplier Indicator: The

5. Frequency multiplier indicators, ad-

jacent to the frequency dial scale,

light and correspond with the settings of the frequency range selector @ pushbuttons.

6.

FREQUENCY Scale:

The Frequency scale

comprises two scales with ranges of

2.2 to 7.0 and 7 to 22 (1.0 to 3.2 and

3.2 to 10 for Option 001). One or the

other of the scales is automatically

illuminated depending on the FREQUENCY RANGE selector @ setting.

OVER LIMIT Display: The letters "OVER

7. LIMIT" are displayed when the measured Q value exceeds the limit value set by the Q LIMIT control 0.

Measurement Terminals: These binding

8.

post terminals facilitate connection

of the unknown and the various measurement aid accessories. A simplified terminal circuit schematic is provided

by the top panel label.

9.

Q Meter:

At

maximum meter pointer de-

flection, this meter indicates the Q value of the sample or of the measuring circuit as well as the optimum tuning point. The outer two scales (0 to 100 and 0 to 30) are the Q readings. The inner two reverse scales (10 to 0 and 3 to 0) provide hQ readings when

making AQ measurements. Meter scale

indicators at the left end of scale automatically light to indicate the appropriate scale (to read) on the se-

lected

Meter Pointer Adjustment Screw:

10.

Q/hQ

range.

adjustment screw zero-sets the meter pointer so it is exactly over the zero

calibration mark when the instrument is off.

AQ ZERO Controls:

11.

These coarse and

fine controls adjust the meter indication for zero (reference) scale in AQ

measurements.

This function applies

only to AQ measurements.

This

L Scale: This dial scale allows di-

12. rect reading of inductance sample values at the "L" frequency. An "L" scale frequency point, common to and useable on all frequency ranges, is

labeled with a blue letter on the FRE-

QUENCY scale 0.

The L scale indi-

cates the inductance value of the un-

known when resonated with the tuning

capacitance at the "L" frequency.

13. AC Scale: This dial scale permits the reading of the capacitance of a vernier tuning capacitor from -5pF to

+5pF in O.lpF steps. The actual tuning capacitance is sum of the C Scale @ and the AC Scale readings. A small change in the tuning capacitance ad-

justment point resulting from a variation in test parameters can be accurately read from the spread AC

scale.

14. C Scale:

This dial scale is for reading the capacitance of the main tuning capacitor which may be varied from 25pF to 470pF.

A

C scale reading is

exact (calibrated) when the AC scale@

is set to OpF.

15.

AC Dial Control: This dial wheel varies the vernier tuning capacitor

and moves the AC Scale 0. The control employs a string drive mechanism

which facilitates easy adjustment of vernier capacitor.

L/C Dial Control: This dial wheel

16. varies the main tuning capacitor as well as moving the C scale @ and L

scale 0.

Q/ AQ RANGE Selector: These push-

17. buttons select the desired Q range

(either 30, 100, 300 or 1000 full

scale).

AQ button enables AQ measure-

ment and expands Q resolution by ten

times (3, 10, 30 or 100 full scale).

Figure 3-l. Front Panel Controls (Sheet 2 of 2).

3-3

Section III Figure 3-2

Model 4342A

1

METER ZERO AD<J: This trimmer adjust-

1. ment electrically zero-sets the meter pointer so that it is exactly over the

zero calibration mark when the instru-

ment is on. FUSE: Instrument power fuse is in-

2.

stalled in this fuse holder. Appropriate current rating for the fuse required is labeled on the rear panel.

VOLTAGE SELECTOR: This slide switch

3. selects the appropriate ac operating

power voltage (115V or 230V +lO%). Selection of the ac voltage must be made before the instrument is connected to power line.

LINE Receptacle: Male ac power line

4.

receptacle with center ground pin for powering the instrument from a 115V or

23OV, 48 - 440Hz line. Before con-

necting power cord (furnished), VOLTAGE SELECTOR @ should be properly set.

OVER LIMIT DISPLAY TIME Switch: This

5. slide switch sets "OVER LIMIT" annunciation time for Go/No-Go checks to either 1 second (1 set) or to contin-

ous (00).

OVER LIMIT SIC. OUTPUT Connector:

6. Relay contact output for Go/No-Go checks. Center and outer conductors of this BNC connector are internally short-circuited when measured Q value exceeds the limit value set by the Q LIMIT control.

7.

Q .4NALOG OUTPUT Connector: 0 to 1v

analog output proportional to meter deflection.

Output impedance is ap-

proximately 1kR.

FREQUENCY MONITOR Connector:

8. connector provides a portion of inter-

nal oscillator output for monitoring

oscillator frequency with external e-

quipment (such as a frequency counter). Output level is 17OmVrms min. and

output impedance is 50R.

9.

Measurement Terminals: These six binding post terminals, including the

two shield terminals, provide the con-

nection capabilities for attaching the unknown sample as well as supplemental

inductors, auxiliary capacitors, and other devices and accessories used in

making measurements.

This BNC

3-4

Figure 3-2. Rear Panel Controls and Connectors.

Model 4342A

Section III

Paragraphs 3-10 to 3-17

3-10. MEASUREMENT TERMINALS. 3-11. Six binding post terminals, including

two shield terminals, mounted on the instrument top deck, facilitate connection of unknown samples and accessories to the measuring circuit. Figure 3-3 illustrates the measurement terminals circuit configuration. Shield terminals 3 and 6, and binding post 4

are directly connected to instrument chassis

(grounded). Binding posts 1 and 2 are the LO and HI COIL terminals, respectively, to which an inductor is connected to compose the circuit to be resonated. Inductors can be meas-

ured by connecting them to the COIL terminals

(1 and 2) and by taking resonance with the

tuning capacitor. injected into the measuring circuit between LO COIL terminal 1 and GND terminal 4. Bind-

ing posts 4 and 5 are CAPACITOR terminals which are used for doing parallel connection measurements (outlined in paragraph 3-19).

Shield terminals 3 and 6 are used for connec-

tion to the shield terminal of an inductor or

to the guard terminal of the device connected

between HI COIL terminal 5 and GND terminal 4.

3-12. HOW TO CONNECT UNKNOWN.

3-13. There are three basic methods of connecting unknown sample to the measuring cir-

cuit of the Q Meter. The characteristics of the unknown, the parameter value to be measured, and the measurement frequency are the

factors which guide the selection of an appropriate connection method. The fundamental operating procedures for each individual connection method are outlined in Table 3-l.

The oscillator signal is

3-14. MEASUREMENT PARAMETERS AND CONNECTION

METHODS.

3-15. The connection to the measuring circuit of the 4342A, when measuring quality factor, inductance, capacitance, resistance or dielectric constant, may be either a di-

rect, parallel, or a series connection and depends upon the sample. As the sample values and measurement parameters are the guidelines for selecting an appropriate connection method, a discussion of the measurement capabilities unique to each connection method will help you to make straight-forward

measurements. The measurement range limits

of the individual connection methods and

associated reasoning are outlined in the

paragraphs which follow.

3-16.

3-17. method in taking Q meter measurement parameters, only the quality' factor, inductance, equivalent series resistance, and distributed capacitance of the inductor can be read from Q meter indications. In addition, the quality factor and the inductance measurement ranges covered by the direct connection

method are dependent on sample inductance and measurement frequency. This is because the

sample value and measuring frequency must satisfy the following mathematical relationship so as to resonate with the measuring circuit:

Direct Method Limitations.

When using the direct connection

(2Trf)2LC = 1 . . . . . . . . . . . . . . . . . (eq. 3-l)

Where, f: Measurement frequency

L: Inductance of sample

Tuning capacitance (read from

c:

C dial scale; 25pF to 470pF)

SHIELD

0

3

Figure 3-3.

SHIELD

0

6

Measurement Terminal Circuit.

For example, if the measurement frequency is

lMHz, the inductance range of a sample which

can be measured directly by the 4342A is approximately 54uH to 1.2mH. And, for a given inductance, the measurement frequency range is indicated. For example, a 1OuH inductor can be measured over a frequency range of ap-

proximately 2.3MHz to 11MHz. Additionally,

the quality factor of sample must be below

1000 (upper range limit). Figure 3-4 sh/ows

the relationships between the measurement fre-

quency and the inductance limits measurable with the 4342A alone (without using any supplemental equipment). In Figure 3-4, the

shaded area denotes the applicable induct-

ances and useable frequencies. The seven bold lines in the shaded area indicate the "L"

frequencies and the ranges of inductance which can be read from the L/C dial L scale

3-5

Section III Paragraphs 3-18 to 3-23

Model 4342A

at these particular L frequencies. The induc-

tance at a measurement frequency other than the "L" frequency can be determined by substi-

tuting frequency and L/C dial (C scale) read-

ings in equation 3-l.

3-18. Expansion of measurement ranges.

3-19.

For higher or lower value inductances

(above or below the shaded area in Figure

3-4), a parallel or series connection of the

unknown to the measuring circuit enables the

measurement to be made. To obtain the value

of the desired parameter, these methods em-

ploy a comparison of the Q meter indications.

The Q meter measuring circuit is first resonated with a reference inductor.

Then the

sample is connected in parallel or in series

with the measuring circuit and the circuit

again resonated.

The sample value is calcu-

lated from the difference in Q meter indica-

tion measurements made before and after connecting the sample. In the equation from which the sample values are obtained, the

values inherent in the reference inductor are

subtracted from the measurement quantities. Consequently, the characteristics of the reference inductor do not (theoretically) affect

measurement results.

In addition to their expanded measurement ranges,

the parallel and series methods have

some measurement capability advantages which do not appear when using direct methods.

A detailed description of these advantages is

given in the discussion in paragraph 3-58.

3-20. Capacitance Measurement.

3-21. For capacitor samples, either a paral-

lel or series connection method may be used when measuring either the capacitance or the Q value. The criteria for selecting the ap-

propriate connection method concerns only the

sample value and is irrespective of the measurement frequency. Capacitances higher than approximately 450pF (up to approximately

0.2uF) are normally measured by the series

method and lower capacitances are easily measured by the parallel method. Generally,

capacitors can be measured at the desired frequency by using an appropriate inductor as a measurement aid.

3-22. Resistance Measurement.

3-23. Resistance values are fundamentally calculated from measured Q values. Thus, the connection method selected depends upon the sample value and the measurement frequency. Figure 3-5 shows approximate limits for both

parallel and series measurements.

The upper shaded area indicates the combinations of frequency and measurable resistance values for

parallel measurements. Similarly, the lower

shaded area indicates the values for series

measurements. For sample values between the upper and lower shaded areas, it is difficult

3-6

I I I III I I III I I III I I III

IOK lOOK

Figure 3-4.

FREQUENCY (Hz)

Inductance Measurement Ranges

IM IOM l3OM

vs. Frequency (direct method).

Model 4342A

Section III

Paragraphs 3-24 to 3-29

to measure with either connection method. These limits are based on the use of a reference inductor having a Q value of 280. Parallel measurement low limits can be ex-

tended by using an external capacitor connected to the measurement CAPACITOR (HI and

GND)

terminals.

3-24. High Q Measurement.

3-25. Measurement of high quality factors up

to 10000 can also be made by the parallel or

series connection methods. These methods

enable the measurement of low loss samples

and are especially useful in the measurement of high Q capacitors.

As

inherent losses in

the instrument will cause larger incremental measurement errors in higher Q measurements,

these residual loss factors should be taken

into consideration in the accuracies of measured values. In high Q measurements, the measured Q should be deemed to be only a rough approximation of the sample Q value.

A

detailed discussion on parallel and series

connection measurement errors is provided in paragraph 3-60 and those which follow.

3-26.

Supplemental Equipment Used in Parallel and Series Methods.

3-27. For use with the 4342A as reference inductors, the Model 16470A series supple-

mental inductors are available. The

16470A

series inductors have various inductances

(from 0.07pH to 630mH) and totally cover the frequency range of 1OkHz to 70MHz when used with the 4342A as measurement aids. The reference inductor must be resonated alone

(before connecting unknown) at the desired measurement frequency to take its inherent values for reference. And, of course, the useable frequency range of each individual supplemental inductor depends upon the inductance of the individual coil. This frequency range is indicated on a label attached

to the case of each inductor. Detailed data and information on the supplemental inductors is tabulated in Table 1-2.

3-28. Inductor samples whose inductance is somewhat lower than the low limits of the

measurement range of the 4342A may be meas-

ured by using an external high Q capacitor to extend the available tuning capacitance range. The external capacitor is connected between HI and GND measurement terminals; its capacitance, thereby, adds to the tuning capacitance. For this special purpose, the HP

16462A Auxiliary Capacitor is available. This capacitor module combines nine capacitors from 300pF to 2700pF (in 300pF steps) and, when used with the 4342A, allows measurement of low inductances to approximately l/6.7 of the measurement

low limit

of the instrument.

IOK 22K IOOK IM IOM 70M

Figure 3-5.

MEASURING FREQUENCY IN Hz

Ranges of Measurable Resistance.

3-29.

Dielectric constant of an insulating material is calculated from the capacitance value of the sample held between a pair of

electrodes whose dimensions are accurately known. Model 16451A Dielectric Test Adapter is the test fixture which is specially designed for measuring dielectric constant

(E)

and dielectric loss angle (tan 6) and is directly attached to the 4342A measurement terminals. The 16451A has a pair of variable

precision electrodes which can hold materials

measuring up to a maximum of 1Omm in thick-

ness. The electrodes operate similar to a micrometer permitting direct reading of elec-

trode spacing (0 to 1Omm) with 0.02mm resolution.

The diameter of the electrodes has

been designed so as to simplify the associat-

ed calculations. Measurement time is thus greatly shortened.

3-7

Section III

Figure 3-6

Model 4342A

3-8

I I

1

Figure 3-6.

1

Zeroing Procedure (sheet 1 of 2).

J’

Model 4342A

Mechanical zero adiustment

The meter is properly zero-set when the pointer sets exactly over

the zero calibration scale mark and the instrument is in its normal

operating environment.

To check the meter mechanical zero, turn the

instrument off and allow 30 seconds to completely deenergizethe z strument.

the meter is not over zero,

Rotate meter pointer adjustment screw @ clockwise until meter

a.

To obtain maximum accuracy and mechanical stability, if

zero-set the meter as follows:

is moving toward zero in an upscale direction.

b. Continue rotating screw clockwise and stop when pointer is

exactly at zero. If the pointer overshoots, continue rotating the adjustment screw clockwise to do steps a and b once again.

C.

When the pointer is exactly over zero, rotate adjustment screw slightly counterclockwise to relieve tension on pointer suspension. If pointer moves off zero, repeat steps a, b and c, but rotate less counterclockwise.

Section

Figure 3-6

TTT

Electrical zero adiustment The meter pointer should set exactly over the zero scale mark when instrument is

turned on and nothing is connected to measurement terminals.

Turn the instru-

ment on and allow at least 15 minuts warm-up time to let the instrument reach a

stable operating condition. If meter pointer is not over zero, zero-set the

meter as follows:

Set FREQUENCY RANGE selector @to 22k - 70k (10k - 32k for Option

a.

001) and Q RANGE@ to 1000.

Adjust rear panel METER ZERO ADJ control@ so that the meter

b.

pointer is exactly over zero.

Figure 3-6. Zeroing Procedure (sheet 2 of 2).

3-9

Section III

Table 3-l

Model 4342A

Table 3-1.

Direct Connection.

HI HI

osc frequency.

Parallel Connection.

LO

osc -

(Bl

I

E

HI

-

v-

UNKNOWN

b

ON0

Methods of Connecting Unknown.

Inductors can usually be measured by connecting

them directly to the COIL terminals as shown in Figure A. The measuring circuit is resonated by adjusting either the L/C dial or the FREQUENCY dial controls. The quality factor (indicated Q) of

0

the sample is read at maximum deflection of the Q

Meter. Setting the FREQUENCY dial to the "L"

scale point and taking resonance with the L/C dial control permits reading the inductance of the sample directly from the inductance scale (adjacent to the tuning capacitor scale). Otherwise the

0

GND

inductance can be calculated from the frequency and capacitance dial readings at the desired resonant

The parallel connection is suitable for high imped-

ance measurements. High inductances, high resist-

ances, and small capacitances can be measured by

connecting the samples to the CAPACITOR terminals

as shown in Figure B. Before connecting a sample,

the measuring circuit is resonated with a stable inductor (such as a 16470 series supplemental inductor) connected to the HI and LO COIL terminals to obtain a reference Q reading and a capacitance

dial reading. The measuring circuit is again re-

sonated with the sample connected to the CAPACITOR terminals by re-adjusting the L/C dial for maximum Q meter deflection.

sample are derived from the Q meter readings and

the L/C dial readings obtained before and after connecting the unknown sample. The derivation of parameter values related to the unknown are detailed in paragraphs 3-64 through 3-72.

The parameter values of the

Series Connection.

3-10

HI

h

osc

(Cl

HI

0

GND

The Series connection is suitable for low impedance measurements. Low inductances, low resistances and

high capacitances can be measured by connecting the sample in series with a stable inductor as shown in Figure C.

The 16014A Test Adapter is useful for making the series connection to the unknown sample. First,

a shorting strap is attached to the unknown

connection terminals in parallel with the sample and the measuring circuit resonated with the L/C control. For reference, the Q meter and capacitance dial readings are noted. The shorting strap is then disconnected (or removed) and resonance of the measuring cicuit is again taken by adjusting the L/C dial.

The parameter values of the unknown can be derived from the Q meter and capacitance dial readings obtained before and after disconnecting the shorting strap. The derivation of the parameter values related to the unknown are described in paragraphs 3-73 through 3-81.

Model 4342A

Section III

Paragraphs 3-30 to 3-34

Direct Connection Measurements

3-30. BASIC Q METER MEASUREMENTS.

3-31. QUALITY FACTOR AND INDUCTANCE

MEASLREMENT~ (DIRECT C~NNK-U~N).

3-32. This paragraph and those which follow

describe the fundamental operating procedures

for quality factor and inductance measurements which are typical applications of the Q Meter. An inductor usually has some distributed capacitance (Cd). resonant frequency (fo) of the inductor is determined by its self-inductance and the Cd. The 4342A measuring circuit consideration of distributed capacitance is shown in Figure 3-7. If the Q meter indication is Qt when Cd is zero, then the presence of Cd will influence the voltage across the resonating induc-

tor such that the Q meter will actually indicate a Q value lower than Qt. The indicated Q value (Qi) and the Qt can be correlated by a correction factor (which is a function of Cd and the tuning capacitance) each with the other. A similar correction factor also applies to difference of inductance readings resulting from the presence of Cd. tailed discussion of correction factors is given in paragraph 3-50. When the Cd is less than l/20 of the tuning capacitance, the

difference between Qi and Qt (Li and Lt are

similar in meaning) is within 5%.

The self-

A de-

Adjust L/C dial control for maximum

C.

panel Q meter deflection on the

instrument.

Note

Alternatively, the resonance may be

taken by setting the L/C dial to a desired position and adjusting the FREQUENCY dial for maximum Q meter deflection.

Depress Q RANGE button as appropriate

d.

for obtaining a Q meter deflection

more than one-third of full scale and

less than full scale. Re-adjust L/C dial (or FREQUENCY dial)

e.

control for maximum deflection. If

panel meter deflection exceeds full

scale,

up-range the Q RANGE and continue the adjustment. For easily obtaining a precise resonance, use the AC dial control.

Note

The AC dial control facilitates accurate adjustment for establishing resonance especially in high Q

measurements.

rI I

Cd +

I I

L,

GND

Figure 3-7.

Distributed Capacitance in Direct Connection.

3-33. Q Measurement.

3-34.

To read the quality factor of an in-

ductance sample directly from the Q meter

indication, proceed as follows:

a. Connect unknown to measurement COIL

(HI and LO) terminals.

Depress an appropriate FREQUENCY RANGE

b.

button and set FREQUENCY dial control to the desired frequency.

0

Read panel Q meter indication on the

f.

meter scale designated by the appro-

priate scale lamp indicator lit.

Note

The measured Q value corresponds to

the "indicated Q" of the sample.

To derive series equivalent resistance

g*

of the sample, substitute the Q meter FREQUENCY, C dial, AC dial, and Q

readings in the following equation:

Rs = l/wCQWO.l59/fCQ . . . . . (eq. 3-2)

Where, Rs: equivalent series resist-

ance in ohms.

f: frequency dial reading in

hertz.

0: 2~r times the frequncy

(2wf).

c: sum of C and AC dial read-

ings in farads.

panel Q meter reading.

Q:

3-11

Section III Paragraphs 3-35 to 3-38

Direct Connection Measurements

AQ

3-35.

3-36. cal, accurately on the normal Q scale.

Measurement.

When two Q values are nearly identi-

the difference is difficult to read

The AQ

feature of the 4342A provides accurate read-

ings for changes in Q on all Q ranges by providing ten times resolution, namely: 0 to 3, 0 to 10, 0 to 30, and 0 to 100.

To make a AQ

measurement, proceed as follows:

Connect the sample inductor to the

a.

measurement COIL (HI and LO) terminals Resonate the inductor using the

b,

same

procedure as described in Q Measurement (para. 3-34) steps b, c, d and e.

c. Note panel Q meter reading.

Depress AQ button and set AQ COARSE

d.

and FINE controls so that meter pointer indicates zero (full scale) on AQ scale.

Check for correct resonance by slight-

e.

ly rotating AC dial control.

If

Q

meter deflection is not at peak, re-

adjust AC dial and AQ controls.

Make the desired change in the sample

f.

or in the measuring circuit. Adjust L/C dial control for maximum Q

g.

meter deflection.

Use AC dial control

for easily taking a precise resonance.

If meter pointer scales out at the left end of the scale (AQ full scale),

reset the function to normal Q

meas-

urement and skip steps h and i.

h. Read panel Q meter indication on AQ

scale.

The AQ reading is the difference in Q resulting from the change made in step f.

Model 4342A

3-37. Inductance Measurement.

3-38.

The inductance of a coil can be

meas-

ured directly from the Q meter inductance

scale at specific "L" frequencies. The in-

ductance range which

may

be measured directly at the "L" scale frequency point on the selected frequency range is labeled on the

panel adjacent to the FREQUENCY RANGE pushbuttons. To measure inductance at the "L"

frequency, proceed as follows:

Connect unknown to measurement COIL

a.

(HI and LO) terminals.

b.

If the approximate value of inductance is known, select an appropriate measuring frequency range. Refer to the chart in Figure 3-4 or the inductance multiplier label adjacent to the FREQUENCY RANGE pushbuttons. For the samples whose values are quite unknown, select a trial frequency range. Depress the selected frequency range

pushbutton.

Set FREQUENCY dial control for the "L"

C.

scale frequency designated by the mark "-L-" (shown in blue) on the FREQUENCY scale.

Set Q RANGE to 100. Rotate L/C dial

d.

control and verify that panel Q meter indicates peak deflection.

If a peak

meter deflection can not be recognized,

change to another trial FREQUENCY RANGE setting and repeat the procedure until a peak is verified.

Set AC dial to zero scale (OpF).

e.

1.

.

1.

3-12

The differential Q value (after

change) is given by the following equation:

Qz = Q1 - AQ

where, Q1:

. . . . . . . . . . . . . . . (eq. 3-3)

Q meter reading in step c

(before change).

present Q value (after

Q2:

change).

AQ: Q meter reading from AQ

scale in step h.

When the change in Q exceeds AQ full

scale, the difference is given by the following equation:

AQ = QI - Qz

. . . . . . . . . . . . . . .

(eq. 3-4)

Adjust L/C dial control for maximum Q

f.

meter deflection (change Q RANGE setting as necessary).

Read L/C dial L scale indicated by the

g.

fixed scale pointer. To calculate the

inductance value,

multiply the L scale

reading by the factor for the selected

inductance range.

Note

The measured value corresponds to

the "indicated L" including meas-

uring circuit residual factors

(similar to "indicated Q" value).

Model 4342A

Section III

Paragraphs 3-49 to 3-44

3-39.

3-40. measure inductance at frequencies other than the specific "L" frequencies. The frequency characteristic measurements of an inductor or of an inductor core are representative examples.

may

Inductance Measurement (at a desired

frequency).

Occasionally it

In such instances, the inductance

be measured as follows:

Connect unknown inductor and resonate

a.

it using the procedure cribed in Q Measurement (para. 3-34) steps a through e.

b. Note FREQUENCY dial, L/C dial C scale

and AC dial readings. Substitute these

values in the following equation:

L = l/w2C "N0.0253/f2C . . . . . (eq. 3-5)

Where, L:

f: measurement frequency in W: c:

may

be necessary to

same as

inductance value (indicated L)

of

sample in henries.

hertz.

2~r times the measurement frequency. sum of C and AC dial

readings in farads.

des-

3-41. MEASUREMENTS REQUIRING CORRECTIONS.

3-42. Effects of Distributed Capacitance.

3-43. The presence of distributed capacitances in a sample influences Q meter indications with a factor that is related to both

its capacity and the measurement frequency. Considerations for the distributed capacitances in an inductor may be equivalently expressed as shown in Figure 3-8. In the

low frequency region, the impedance of the distributed capacitance Cd is extremely high and has negligible effect on the resonating

circuit. Thus, the sample measured has

an inductance of Lo, an equivalent series resistance of Ro, and a Q value of wLo/Ro

(where, w is 2~ times the measurement frequency). In the high frequency region, the inductor develops a parallel resonance

with the distributed capacitance and the impedance of the sample increases at frequen-

cies near the resonant frequency.

readings for measured inductances will be higher as the measurement frequency gets

closer to the self-resonant frequency.

Additionally, at parallel resonance, the

equivalent series resistance is substantially increased (this is because, at resonance,

the impedance of the sample changes from re-

active to resistive because of the phase shift in the measurement current) and the

measured Q value reading is lower than that determined by wLo/Ro. Typical variations of Q and inductance values under these condi-

tions are given in Figure 3-9.

Therefore,

Cd

,4,,A;,i~,

I

r

Cd

Figure 3-8. Distributed Capacitance Circuit Model.

3-44. the self-resonant frequency can be converted to a distributed capacitance and tuning capa-

citance relationship with the following equation:

Figure 3-10 graphically shows the variation

of measured Q and inductance as capacitance is taken for the parameter. inductance and Q values in the presence of

no distributed capacitance (or when it is negligible) are correlated with the actually measured values by correction factors which

correspond to readings along the vertical axis scales in Figures 3-9 and 3-10.

Ratio of the measurement frequency and

fl/fo = kd/(C + Cd) . . . . . . . (eq. 3-6)

Where, fi: measurement frequency.

fo: self-resonant frequency of

sample.

Cd:

distributed capacitance of sample.

c: tuning capacitance of Q

meter.

The ideal

3-13

Section III Paragraphs 3-45 and 3-46

Measurements Requiring Corrections

3-45.

Measuring Distributed Capacitance

(Preferred Method).

3-46. The impedance of a coil at its selfresonant frequency is resistive and usually high.

This characteristic may be utilized

for measuring distributed capacitance. Proceed as follows:

1.25

Model 4342A

Connect inductor sample to be tested

a.

to the 4342A measurement COIL (HI and LO) terminals.

Set L/C dial control to approximately

b.

400pF and AC dial control to OpF.

Note C dial reading as Cl.

Depress a trial FREQUENCY RANGE button

C.

and rotate FREQUENCY dial to search

for the frequency at which panel Q meter shows a maximum deflection. no peak deflection can be observed,

change FREQUENCY RANGE setting and

repeat the procedure.

Adjust FREQUENCY dial control for

d.

imum Q meter deflection. Note the dial frequency reading as fl.

Set measurement frequency to approxi-

e.

mately ten times the frequency fl

noted in step d.

If

max-

(fo=SELF-RESONANT FREQUENCY OF COIL)

Figure 3-9.

and Inductance with Frequency.

Figure 3-10.

Typical Variation of Effective Q

TUNING CAPACITANCE IN pF

Correction Chart for Distributed

Capacitance.

Replace the inductor sample with a

f.

stable coil (16470 series supplemental inductor) capable of resonating in the

measuring circuit at this higher fre-

quency.

Adjust the L/C dial control for maxi-

g.

mum Q meter deflection.

Connect the test inductor to the

h.

urement CAPACITOR (HI and GND) terminals.

Adjust the L/C dial control for again

1. obtaining maximum Q meter deflection.

If the L/C dial control has to be rotated in the direction of higher capacitance, increase the measurement frequency.

If it has to be rotated towards a lower capacitance, decrease the frequency.

Alternately connect and disconnect the

j.

test inductor to/from the CAPACITOR terminals and adjust the FREQUENCY dial control (if necessary, change FREQUENCY RANGE setting) until the in-

fluence of the test inductor to tuning conditions is non-existent (indicated

Q value may change).

quency reading as fo.

Note dial fre-

This frequency is identical with the self resonant frequency of the inductor.

Distributed capacitance of the induc-

k.

tor sample is given by the following

equation. Substitute measured values

of Cl, fo, and f~ in the equation:

meas-

3-14

Model 4342A

D..oO.o..O. (eq. 3-7)

Cd =*

Where, Cd: distributed capacitance in

farads.

Cl : C dial reading (farads)

noted in step b.

fo: measurement frequency

(hertz) noted in step j.

f1:

measurement frequency

(hertz) noted in step d.

Note

If fo>fl, the eq. 3-7 is simplified

as follows:

2

Cd =

. . . . . . . . . . . (eq. 3-7)

Cl

Measurements Requiring Corrections

Distributed capacitance is given by

g-

the following equation. Substitute measured values of Cl, Cp, fl and f2 in the equation:

Cd = w . . . . . .

n =Where, Cd:

fl

f2

Paragraphs 3-47 to 3-50

. . (eq. 3-9)

distributed capacitance in farads. C dial reading (farads)

Cl :

noted in step b.

c2 :

C dial reading (farads)

noted in step f.

f1:

measurement frequency

(hertz) noted in step d.

f2:

measurement frequency

(hertz) given in step e.

Section III

3-47. Measuring Distributed Capacitance

(Approximate Method, CdllOpF).

3-48.

A distributed capacitance more than approximately 1OpF may be measured with the simplified procedure described below (this

procedure is useful for obtaining approximate values of distributed capacitance with an accuracy which serves practical purposes):

Connect inductor sample to the meas-

a.

urement COIL (HI and LO) terminals.

b. Set L/C dial control to approximately

50pF and AC dial control to OpF. Note the C dial reading as Cr.

C. Depress a trial FREQUENCY RANGE button

and rotate FREQUENCY dial control to

search for the frequency at which panel Q meter shows a maximum deflection. If no peak deflection can be observed, change FREQUENCY RANGE setting and repeat the procedure.

Adjust FREQUENCY dial control for max-

d.

imum panel Q meter deflection. Note this frequency as fr.

Change FREQUENCY dial setting to f2

e.

equal to fl/n (n should be a selected

integer, e.g. 2 or 3).

Adjust L/C dial and AC dial controls

f.

for again obtaining maximum meter deflection. Note the sum of C dial and AC dial readings as Cz.

Note

If fz is exactly one half of fl, then

Cd = ‘2 - 4c1

3

. . . . . . . . . . .

(eq. 3-10)

An average of several measurements

using different values of Cl will im-

prove the results of this measurement. The best accuracy to be expected with this method, however, is in the range

of +2pF.

3-49.

3-50.

CORRECTION FOR Q.

To use the indicated Q for the purpose of calculating L and Rs (in determining the actual equivalent circuit), it must be corrected for the effects of the distributed

capacitance. The corrected Q and the Q value

measured by the Q meter can be obtained from the following equation:

Qt = Qi

' +CCd . . . . . . . . . . .

(eq. 3-11)

Then,

Correction factor =

C + Cd

C

. . . . . . . . . . .

(eq. 3-12)

Where, Qt: corrected Q value.

Qi:

indicated Q value.

c:

sum of C and AC dial readings.

Cd:

distributed capacitance of

sample.

3-15

Section III Paragraphs 3-51 to 3-54

Model 4342A

Measurements Requiring Corrections

Figure 3-10 is a graphical solution to equation 3-11. The corrected Q value Qt may be deemed the quality factor calculated

as

wLo/Ro from inductance Lo, equivalent series

resistance Ro,

(refer to paragraph 3-43).

not identical to "effective Q".

and the measurement frequency

However, Qt is

The corrected Q is also a "circuit Q" which includes the additional losses of the measuring circuit.

3-51. By substituting equation 3-6 in equation 3-11, the correction factor in equation 3-11 can be converted into a relationship of

measurement frequency and self resonant fre-

quency of sample. And the corrected quality factor may be expressed as follows:

Qt = Qi

Where, fl:

fl 2”“““’

+

fo

measurement frequency.

(eq. 3-13)

fo: self resonant frequency of

sample.

A graphic expression of the above equation is

shown in Figure 3-9.

equation 3-13 produces a negative Qt.

fo ,

When fl is greater than

However, this negative Q has no meaning and

should not be used.

A negative Q is obtained

when the reactance of the sample becomes

capacitive (effect of distributed capacitance) instead of inductive at frequencies above fo.

3-54. Correction of the measured inductance to arrive at a true model of the equivalent circuit of the sample also requires a correc-

tion for the distributed capacitance (similar

to the correction in para. 3-50 for indicated

The corrected inductance value is given

9)

.

by the following equation:

Lt =

Where, Lt:

Li:

c:

Cd:

Li

C

C + Cd

. . . . . . . . . .

(eq. 3-15)

corrected inductance value. indicated inductance value. sum of C and AC dial readings. distributed capacitance of sample.

Equation 3-15 may be converted into a frequency form as follows:

Lt = Li {l - [%I21 . . . . . . (eq. 3-16)

Where, fi:

measurement frequency

fo: self resonant frequency

of

sample.

Graphic solutions of equations 3-15 and 3-16 are shown in Figures 3-10 and 3-9, respectively.

3-52.

CORRECTION FOR INDUCTANCE.

3-53. The residual inductance of the meas-

uring circuit is included in the measured

inductance of sample.

When the sample value

is in the vicinity of 0.5~H or less, the measured inductance should be compensated for such residual inductance.

This compensation

can be made simply by subtraction as follows:

Lm = Li - Lres . . . . . . . . . . . . (eq. 3-14)

Where, Lm:

measured value excluding re-

sidual inductance. Li: measured inductance. Lres: residual inductance of meas-

uring circuit.

The Lres in the 4342A is approximately O.OlpH.

3-16

Model 4342P

Section III

Paragraphs 3-55 to 3-61

3-55. PARALLEL AND SERIES CONNECTION

MEASUREMENT METHODS.

3-56. GENERAL.

3-57. In practical applications of the Q meter, of parallel and series connection measurements yield various advantages. For example,

the parallel method permits measuring inductor samples at frequencies about its selfresonant frequency (fo). In addition, inductance just below resonance, impedance at resonance, and apparent capacitance above fo can be measured. for measurement of inductors which are designed to resonate with tuning capacitors

less than 20pF at their respective nominal working frequencies. A great number of coils known as "peaking coils" fall into this category. If there is no requirement for particular measurement conditions, the coil can be measured using the direct connection method. Here, the measurement parameter values may be read directly from Q meter

indications. However, if the sample requires measurement with a tuning capacitance of less than 20pF, a direct measurement is

impossible (due to the minimum capacitance of the tuning capacitor). A parallel measurement will provide the desired data eliminating the limitations of the direct connection method.

3-58. Sometimes parallel or series connection measurements offer improved measurement accuracies. At first glance, these measurement configurations appear to be incompatible

with the stray capacitance, residual induct-

ance and other unwanted additional factors incident in the use of supplemental equipment

the expanded measurement capabilities

This is especially useful

such as reference inductors and the test terminal adapter. Actually,

these residual factors do not contribute additional errors in the measurement results. factor measurements,

the "indicated Q" va.lues

In quality

obtained by parallel or series methods are usually a better approximation of "effective Q" than those obtained by direct methods. As

the differences between the measured values and the effective values decrease further to small orders of magnitude, parallel and series methods are sometimes also used for samples which can he measured by direct

methods.

3-59.

Measured values in parallel and series methods are theoretically given only by the variable quantities which yield to differences

in tuning conditions before and after connecting the sample. The constant quantities in

the measuring circuit, which do not vary for

the duration of measurement, are not factors in the results of the calculations for the individual measurement parameters.

Since re-

sidual impedances in measuring circuit as

well as inherent values of reference inductors

are almost constant, these values are mathe-

matically eliminated and also do not influ-

ence the measurement results.

So, what

additional measurement errors are contributed

by the parallel and series methods?

Let's discuss them in detail. 3-60. Additional Error Discussion.

3-61. Certain residual impedance elements

change with the method of connection of the

sample; in addition, the residual impedance also depends upon the mutual distances between the sample and the individual components of the measurement apparatus. Typical circuit models showing such residual factors are illustrated in Figure 3-11.

CI, and C5 in

Stray Capacitances about

Measurement Terminals

(A)

Figure 3-11. Residual Parameters.

Rotor plates

Stator plates

Distributed Inductances

In Tuning Capacitor

(B)

3-17

Section III

Paragraphs 3-62 to 3-66

Model 4342A

Figure 3-11 (A) exhibit the stray capacities

added by connecting a sample with a shielded

case.

This capacitance increase adds to the

stray capacitances (Cl, C2 and Cs) around the measurement terminals. In a series measurement,

the shorting strap, for initially

short-circuiting the unknown connection ter-

minals, has its own residual impedance. Additionally, its contact resistances differ

from those of samples. Small changes in the loss and the distributed inductance of the tuning capacitor affect measurement accuracies. Figure 3-11(B) graphically shows an electrical model of a variable capacitor.

The distributed inductance and the loss varies depending on the position of the

capacitor rotor.

In the 4342A, these residual factors are minimum because specially designed, high quality variable capacitors are employed in the tuning circuit.

Actually,

the residual impedances present in

the measuring circuit do not cause significant errors except when measurements of extremely high or extremely low impedance

samples are taken at high frequency.

A full consideration of the factors of additional errors is not practical except in cases where the experiment requires improved accuracies. However, it is difficult to make an accurate Q measurement above 1000 (effective Q) at a

frequency higher than about 1MHz. 3-62. In parallel and series measurements, Q

meter indications are read twice as often as

those in direct method measurements; thus, the accumulation of reading errors and instrumental errors should be taken into consideration. In addition, a more accurate tuning operation is required to minimize these additional errors. To improve frequency accuracy, the oscillator frequency may

be monitored with a frequency counter (using

FREQUENCY MONITOR output at rear panel). 3-63. When a low Q sample is measured, the Q

meter deflection increases and decreases broadly during the tuning operation. Because

of this low resonance sharpness, it is usual-

ly difficult to do exact tuning (to get a resonant peak) and to obtain correct indications.

This limits the resistance value

measurable with parallel and series methods,

respectively, as shown in Figure 3-5. As

high series resistance and low parallel re-

sistance make for very low Q resonance circuits (below lo), the measurement accuracies for such samples are thus much lower.

3-64. PARALLEL MEASUREMENTS.

Note

In the following parallel connection

measurement procedures, set 4342A Q

RANGE as appropriate unless specially instructed otherwise.

3-65. High Inductance Measurement.

3-66. When the measuring circuit is resonated using a reference inductor and then the sample (unknown) inductor placed in parallel

with the tuning capacitor, the tuning fre-

quency will increase. at the measurement frequency, the tuning capacitance

must

be increased.

the unknown inductor can be determined from

relationship of the tuning capacitances at

the same measurement frequency. sample is connected, quality factor and equivalent parallel resistance can also be calculated from a reduction of the panel Q

meter indication, To measure an inductance sample by the paral-

lel method, proceed as follows:

a. Depress appropriate FREQUENCY RANGE

pushbutton and set FREQUENCY dial

control for desired measurement frequency.

b. Select a reference inductor which

allows the measuring circuit to resonate with a tuning capacitance of

30pF to 70pF at this frequency. Connect it to measurement COIL (HI and LO) terminals.

c. Adjust L/C dial and AC dial controls

for a maximum Q meter deflection. Note sum of the C dial and AC dial readings as C1 and panel meter reading as

Ql.

d. Depress AQ button and adjust AQ ZERO

(COARSE and FINE) controls so that meter pointer indicates zero (full scale) on AQ scale.

Press AQ button to release AQ function and recheck for correct resonance. Again depress the AQ button and recheck for AQ zero indication.

To restore resonance

The inductance of

After the

Note

3-18

Model 4342A

Connect unknown inductor to measure-

e.

ment CAPACITOR (HI and GND) terminals.

Restore resonance by adjusting the L/C

f.

and AC dial controls.

C dial and AC dial readings as C2 and panel meter AQ reading. If meter pointer scales out at the left end of

the scale (AQ full scale), reset the

function for normal Q measurement. The difference in Q is calculated from

the two Q values as AQ = Q1 - Q2.

Inductance of the unknown inductor is:

EC.

L=

Where, W= 2~r times the measurement

frequency. Q value of the unknown is:

Q

= 4142

1

w21c2 - Cl)

CC2 - Cl)

AQCl

Parallel Connection Measurements

Note sum of the

(H) . . . . . (eq. 3-17)

-‘--**‘-

(eq. 3-18)

Section III

Paragraphs 3-67 and 3-68

3-67.

Low Capacitance Measurement (<45OpF)

3-68. When the measuring circuit is resonated using a reference inductor, a capacitor placed in parallel with the tuning capacitor will lower the tuning frequency.

To restore resonance at the measurement frequency, the tuning capacitance must be reduced as much as the capacitance of the sample.

Hence, the sample value can be determined by noting the difference between the tuning capacitor dial readings. After the sample is connected, quality factor and equivalent parallel resistance can be calculated from a reduction of panel Q meter indication.

To measure a capacitance sample, proceed as follows:

Select a reference inductor which can

a.

resonate at the desired measurement

frequency and connect it to measure-

ment COIL (HI and LO) terminals.

b.

Set L/C dial control to desired tuning capacitance and AC dial to zero. Note the tuning capacitance Cl.

Where,

AQ = QI

- 42

Equivalent parallel resistance is:

Rp = -QLQ- (52) . . . . . . . . . . (eq. 3-19)

wC1 AQ

h. The capacitance required to tune the

coil at the measuring frequency is simply,

c = c2 - Cl . . . . . . . . . . . . . . . (eq. 3-20)

Note

If the measurement frequency is

higher than the self-resonant fre-

quency of the unknown inductor, the

unknown will not appear inductive but capacitive,

than Cl.

and Cp will be less

Apparent capacitance of the unknown in such frequency region is:

Ca = Cl - CZ . . . . . . . . . . .

(es.

3-21)

and equivalent parallel conductance is

Note

If the approximate value of the capacitor sample is known, select a value for Cl such that the difference between Cl and the sample value is 30 to 100pF.

C.

Depress appropriate FREQUENCY RANGE

button and adjust FREQUENCY dial con-

trol for a maximum Q meter deflection.

Note frequency fl and panel Q meter

reading Q1.

d.

Depress AQ button and adjust AQ ZERO

(COARSE and FINE) controls so that

meter pointer indicates zero (full

scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for correct reso-

nance. Again depress the AQ button

and recheck for AQ zero indication.

e.

Connect the unknown capacitor to measurement CAPACITOR (HI and GND) termi-

nals. Restore resonance by adjusting the L/C

f.

and AC dial controls. Note sum of the L/C dial and AC dial readings as C2 and panel meter AQ reading.

If meter

3-19

Section III Paragraphs 3-69 and 3-70

Model 4342A

Parallel Connection Measurements

g.

3-69.

pointer scales out at the left end of the scale (AQ full scale), reset the function to normal Q measurement. The difference in Q is calculated from the two Q values as AQ = Q1 - 42.

Capacitance value of the unknown capacitor is:

cp = Cl - c2

. . . . ..*...m*.. (eq. 3-23)

Q value of the unknown is:

Q

=

QlQz(C1

- c2)

*QCl

. . . . . . . .

(eq. 3-24)

where, AQ = Q1 - 42 and equivalent parallel resistance of

the unknown is:

Rp = -$$$- (n) . . . . . . . . . . (eq. 3-25)

where,

High Resistance Measurement.

w= 2Tfl.

Note

The reference inductor should be selected so that high resistances are measured with a low tuning capacitance and relatively low resistances are measured with a high tuning capacitance.

Depress AQ button and adjust AQ ZERO

d.

(COARSE

and FINE) controls so that

meter pointer indicates zero (full

scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for correct resonance. Again depress the AQ button and recheck for AQ zero indication.

Connect the unknown resistor to meas-

e.

urement CAPACITOR (HI and GND)

terminals.

3-70.

When the measuring circuit is resonat-

ed using a reference inductor, a resistor placed in parallel with the tuning capacitor will lower the indicated Q in inverse propor-

tion to the sample value.

This reduction of Q is utilized to measure the resistance. avoid a significant increment of measurement error, the measurement should be made for resistors within a reasonable range.

For high resistances, the change in the indicated Q should be greater than the Q meter resolution, that is, 0.1 on AQ = 3 range, 0.3 on

10 range, 1 on 30 range and 3 on 100 range, respectively. For relatively low resistances, the indicated Q should be higher than

10 when the sample is connected.

See Figure

3-5 for suitable sample value ranges. To measure high resistances, proceed as

follows:

a. Depress appropriate FREQUENCY

RANGE

button and set FREQUENCY dial control

to the desired frequency.

b. Connect a suitable reference inductor

to measurement COIL (HI and LO) terminals.

Adjust L/C dial and AC dial controls

C.

for maximum panel Q meter deflection. Note sum of the C dial and AC dial readings as Cl and panel meter reading

91.

TO

Restore resonance by adjusting the L/C

f.

and AC dial controls.

Note sum of the C dial and AC dial readings as C2 and panel meter AQ reading. If meter pointer scales out at the left end of

the scale (AQ full scale), reset the

function to normal Q measurement. The difference in Q is calculated from the two Q values as AQ = Q1 - 42.

The resistance of the unknown resistor

g.

is:

Rp = ---$$& (CL) . . . . . . . . . . (eq. 3-26)

Where, w = 2~ times the measurement

frequency.

If the sample is also reactive, its reactance is:

xp =

1

w(G2 - Cl)

(CL) . . . . (eq. 3-27)

(usually capacitive) and its capacitance is: cp = Cl -

c2

. . . . . . . . . . . . . . (eq. 3-28)

If the sample appears inductive, Cz is larger than Cl.

3-20

Model 4342A

Section III

Paragraphs 3-71 and 3-72

Parallel Connection Measurements

3-71. Dielectric Measurement.

3-72. The dielectric constant and dielectric loss of insulating materials can be measured

by a method similar to and is basically a

capacitance measurement.

When a pair of

parallel electrodes (air capacitor) connected

to 4342A (in air) and an insulating material

placed between the electrodes, the electrode

capacitance increases in proportional to the specific inductive capacity (ES) of the sample material.

The dielectric constant of the sample material is calculated as the product of Es and the vacuum dielectric constant

Accordingly, the dielectric constant can

CO.

be determined from the capacitance measurements made before and after placing the

sample between the elecrodes.

Additionally,

after the sample is mounted in the holder,

the conductance of the sample can also be calculated from a reduction of the Q meter indication. To make easy and accurate

dielectric measurements, it is recommended

that the 16451A Dielectric Test Adapter be

used with the 4342A.

Typical characteristics

of the 16451A are described in Table 3-2.

Materials to be measured with the 16451A

should be less than 1Omm in thickness and from 38 to 55nn in diameter.

When measuring

materials with a high dielectric constant or a large loss, it is usually best to prepare material in thicknesses greater than 3nn. On the other hand, when low loss material is

to be measured, the material thickness should

be less than 3mm.

Materials measuring less than 0.5mm in thickness are usually difficult to measure.

To make dielectric measurements using the

16451A, proceed as follows:

Depress the appropriate FREQUENCY

a.

RANGE button and set FREQUENCY dial

control for the desired measurement frequency.

b.

Select a reference inductor which can resonate at the measurement frequency. Connect it to 4342A measurement COIL

(HI and LO) terminals.

CO

Adjust L/C dial and AC dial controls

for a maximum Q meter deflection. Note sum of the C dial and AC dial readings as Cl and panel meter read-

ing as Qi.

d.

Let the reference inductor remain in place (as is) and attach the 16451A to 4342A measurement CAPACITOR (HI and GND) terminals.

e.

Set 16451A electrode spacing as desired.

However, if possible, it is

best to set the electrode spacing

dimension to about the same as the thickness of the material to be measured.

Again resonate the measurement circuit

f.

by adjusting the L/C and AC dial con-

trols.

Note C dial and AC dial read-

ings as C2 and panel meter reading Qa.

Table 3-2.

16451A (4342A-KOl) Typical Characteristics.

Electrode Diameter: 38mm Electrode Spacing: 0 ~1Omm variable

Minimum vernier division: 0.02nm

Residual Parameters: Co=5pF

Go<0.4uS (at 1OMHz) Loz40nH

Minimum measurable loss angle (tan 6):

Approximately 1 x 10e4

3-21

Section III

Model 4342A

Parallel Connection Measurements

Depress AQ button and adjust AQ ZERO

g.

(COARSE and FINE) controls so that

meter pointer indicates zero (full

scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for current reso-

nance. Again depress the AQ button

and recheck for AQ zero indication.

h.

Place the sample material between

1645lA electrodes. The sample mate-

rial should be in close

contact

electrodes. Note 164SlA micrometer

reading TX (as thickness of the

sample).

1.

Again adjust the L/C and AC dial con-

trols for resonance. Note sum of the C dial and AC dial readings as C3 and panel meter AQ reading.

If meter

pointer scales out at the left end of the scale (AQ full scale), reset the

function for normal Q measurement.

The difference in Q is calculated

from the two Q values as AQ = Q2 - 93.

Remove the sample material from be-

j.

tween the 1645lA electrodes.

k.

Let the L/C and AC dial settings remain as is, and reduce space between the

1645lA electrodes until resonance again occurs. Note the micrometer reading as To.

Note

with

E = EO’ES

TX

= - x 8.85

To

x lo-" (F/m)

. . . . . . . . . . . . . . . (eq. 3-30)

Electrode capacitance with the sample

material is:

cx = +

= c4 - c3 + &

Where,

(PF)

(PF) . .

(eq. 3-31)

the unit for TX and To is cm.

Equivalent parallel conductance of the

sample material is: Gx = 2TrfC1

Qz (Qz- AQ)

..(eq. 3-32)

Dielectric loss angle (dissipation factor) of the sample material is:

tand = Cl . To

Cl

AQ

Q2(Q2 -

AQ

AQ>

= ??c ' Q2(Q2 - AQ)

= Gx/2nfCx . . . . . . . . . . . (eq. 3-33)

Where, f is measurement frequency.

Note

If this procedure is a little difficult,

let the distance between the

16451A electrodes remain the same as the thickness of the sample being

measured and take resonance again

by adjusting the L/C and AC dial controls.

Note sum of the C and

AC dial readings as CI,.

Calculation formulas of the dielectric

1. constant, dielectric loss, and associated measurement parameter values are summarized below: Specific inductive capacity of the sample material is:

Es =

TX

To . . . . . . . . . . . . . . . . (eq. 3-29)

Dielectric constant of the sample material is:

3-22

%2?

Q2(Q2 -

may be used instead of

AQ

in equation 3-33.

AQ)

Q value of the sample material is:

Qx = l/tan B . . . . . . . . . . . . . . (eq. 3-34)

Note

The theoretical formula for

1645lA

electrode capacitance is:

c =

s x1o-2

(F) = '

(PF)

36.~1 xlOg xTo 3.6~ To

where S is area of electrode (cm2).

Since the size of the electrode is

3.8cm in diameter, C aboke can be shown to be l/To (pF).

Model 4342A

3-73. SERIES

Series Connection Measurements

MEASUREMENTS.

Note

Section III

Paragraphs 3-73 to 3-75

C.

Short-circuit the unknown (series connection terminals) with a heavy (low

impedance) shorting strap.

In the following series connection measurement procedures, set 43424 Q RANGE as appropriate unless

specifically instructed otherwise.

3-74.

Low Inductance Measurement.

3-75. Measurement of small inductors at relatively low frequencies can not be made directly at the measurement COIL terminals. However, by using an external high Q capaci-

tor (such as the 16462A Auxiliary Capacitor)

connected in parallel with the tuning capa-

citor, resonance can be obtained at the de-

sired frequency. A second method, which is

explained here, is the series method.

This

method is recommended for measuring low value

inductors without using an external capacitor

(but with an external inductor).

When the measuring circuit is resonated using

a reference inductor, the test inductor placed in series with the reference inductor will lower the tuning frequency.

To restore

resonance at the measurement frequency, the

tuning capacitance must be reduced.

The in-

ductance of the unknown inductor can be determined from the relationship between the

tuning capacitances at the same frequency. After the sample is connected, quality factor and equivalent series resistance can also be

calculated from a reduction of panel Q meter

indication. Proceed as follows:

a. Depress the appropriate FREQUENCY

RANGE button and set FREQUENCY dial control for the desired measurement frequency.

d. Adjust L/C dial and AC dial controls

for a maximum Q meter deflection. Note sum of the C dial and AC dial readings as Cl and panel meter read-

ing as Ql. Depress AQ button and adjust AQ ZERO

e.

(COARSE and FINE) controls so that meter pointer indicates zero (full scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for correct reso-

nance. Again depress the AQ button

and recheck for hQ zero indication.

Disconnect the shorting strap. Again

f.

resonate the measuring circuit by ad-

justing L/C dial and AC dial controls.

Note sum of the C dial and AC dial

readings as C2 and panel Q meter AQ reading. If meter pointer scales out at the left end of the scale (AQ full scale), reset the function to normal Q measurement. The difference in Q is

calculated from the two Q values as

AQ = Q1 - Q2.

Note

This procedure (steps c, d and f) permits the unknown component to be physically connected even

through it is electrically out of the circuit, and eliminates possible errors by maintaining the relative positions of the reference inductor and unknown component.

b. Select a reference inductor which

allows the measuring circuit to resonate with a tuning capacitance of approximately 400pF.

Connect unknown inductor in series with the reference inductor (between measurement LO terminal and low potential end of the

reference inductor) and to measurement COIL (HI and LO) terminals.

Note

If 16014A Series Loss Test Adapter is available, attach it to measure-

ment COIL terminals.

Connect the reference inductor to appropriate terminals of the 16014A and unknown

inductor to 16014A series connection terminals.

Inductance of the unknown inductor is:

g.

l,s = (zic;cf2)

Where,

W = 2~ times

(H) . . . . . (eq. 3-35)

the measurement

frequency. Q value of the unknown is:

Q=

Where,

Q1Q2CC1

Cl (21

42 = Ql - AQ

-

C2)

- C2Q2

"....... (eq. 3-36)

Equivalent series resistance is:

Rs = ($$I Q1 - 42 (n)

. . . . . (eq.

~CI QI Qz

3-37)

3-23

Section III Paragraphs 3-76 to 3-79

Model 4342A

Series Connection Measurements

3-76. High Capacitance Measurement (145OpF).

3-77.

When the measuring circuit is resoated using a reference inductor, a test capacitor placed in series with the reference inductor will raise the tuning frequency. To

restore

resonance

at

the measurement frequency, the tuning capacitance must be increased. The capacitance of the unknown can

be determined from the relationship between

the tuning capacitances at the same frequency.

After the sample is connected, quality factor

and equivalent series resistance can be cal-

culated from a reduction of panel Q meter indication.

To measure a capacitance sample, proceed as

follows:

a. Depress the appropriate FREQUENCY

RANGE button and set FREQUENCY dial control for desired measurement

frequency.

Select a reference inductor which

b.

allows the measuring circuit to resonate with a tuning capacitance of

approximately 200pF.

Note

If the sample value is higher than about 3600pF, it is recom-

mended that the initial tuning

capacitance setting be in the vicinity of 400pF to obtain better measurement accuracy.

Connect unknown capacitor in series with the reference inductor (between measurement LO terminal and low poten-

tial end of the reference inductor)

and to measurement COIL (HI and LO)

terminals.

Note

If

16014A

Series Loss Test Adapter

is available, attach it to measure-

ment COIL terminals.

Connect the

reference inductor to appropriate

terminals of the

16014A

and unknown capacitor to 16014A series connection terminals.

Depress AQ button and adjust AQ ZERO

e.

(COARSE and FINE) controls so that

meter pointer indicates zero (full

scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for correct resonance.

Again depress the AQ button

and recheck for AQ zero indication. Disconnct the shorting strap. Again

f.

resonate the measuring circuit by adjusting L/C dial and AC dial controls.

Note sum of the C dial and AC dial

readings as Cz and panel meter indication as AQ reading. If meter

pointer scales out at the left end of

the scale ( AQ full scale), reset the function to normal Q measurement. The difference in Q is calculated from

the two Q values as AQ = Qr - 42.

Note

This procedure (steps c, d and f) permits the unknown component to be

physically connected even through

it is electrically out of the circuit,

and eliminates possible errors by maintaining the relative positions of the reference

inductor and unknown component.

The capacitance of the unknown capa-

g-

citor is:

cs = (C, - C,)

ClC2

. . . . . . . . . .

(eq. 3-38)

Q value of the unknown is:

Q=

QlQ2(Cl -

CIQI - CzQz

C21

. . . . . .

(eq. 3-39)

Where, 42 = Q1 - AQ

Equivalent series resistance is:

Rs =

Q2 - (21 Q1 (52) . . (eq. 3-40)

WCIQIQP

c. Short-circuit the unknown (series con-

nection terminals) with a heavy (low

impedance) shorting strap.

Adjust L/C dial and AC dial controls

d.

for a maximum Q meter deflection.

Note sum of the C dial and AC dial readings as C1 and panel meter reading

as

QI.

3-24

Where, w = 271 times the measurement

frequency.

3-78.

3-79.

Self-resonant Frequency Measurement of High Capacitors.

Capacitors have a residual inductance

which is dependent on the capacitor lead

Model 4342A

Section III

Series Connection Measurements

length and electrode structure. This inductance resonates with the capacitance of the capacitor at a high frequency. self-resonant frequency, the impedance of the capacitor is minimum owing to the series resonance which occurs in the capacitor itself. Hence, its self-resonant frequency determines the upper limit of the useable frequency for the capacitor. self-resonant frequency of electrolytic, tantalum,

which are within a capacitance range of about 5nF to 1nF can be measured with a Q meter.

When the capacitor self-resonates, the impedance is minimum and purely resistive. characteristic is utilized to determine the self-resonant frequency and the equivalent

series resistance at this frequency. measurement procedure to determine the selfresonant frequency of a capacitor is similar to that for an inductor (described in paragraph 3-46). Proceed as follows:

a. Depress a trial FREQUENCY RANGE

b.

C.

d.

film, mylar capacitors and others

button.

Note

For high capacitance samples, se-

lect either the 22k - 70k or the 70k - 220k range and, for a relatively low capacitance samples, select the 220k - 700k or the

0.7M - 2.2M range, respectively.

Select a reference inductor which allows the measuring circuit to resonate with a tuning capacitance of approximately 400pF. Connect unknown capacitor in series with the reference inductor (between measurement LO ter-

minal and low potential end of the reference inductor) and to measurement COIL (HI and LO) terminals.

Note

If 16014A Series Loss Test Adapter

is available, attach it to meas-

urement COIL terminals.

the reference inductor to appropriate terminals of the 16014A and unknown capacitor to 16014A series connection terminals.

Short-circuit the unknown (series con-

nection terminals) with a heavy (low

impedance) shorting strap.

Adjust FREQUENCY dial control for a maximum panel Q meter deflection.

At this

Usually the

This

The

Connect

Disconnect the shorting strap. Again

e.

resonate the measuring circuit by adjusting the L/C dial control.

dial control has to be rotated in the direction of higher capacitance, increase the measurement frequency. If

it has to be rotated towards a lower capacitance, decrease the frequency.

Repeat steps c, d, and e until the in-

f.

fluence of the test capacitor to tun-

ing condition is non-existent (indicated Q value may change).

Note

If such condition can not be obtained on the selected frequency range even though the L/C dial control is set to maximum, change FREQUENCY RANGE setting to upper

range. If the L/C dial control must be reduced to less than 200pF,

change FREQUENCY RANGE setting to

a lower range. Replace reference

inductor with another trial in-

ductor and repeat steps a through f until the adjustment in step f succeeds.

Note sum of C dial and AC dial read-

g.

ings as Cl and dial freauencv reading

as-fo. This frequency is identical with the self-resonant frequency of the unknown capacitor.

Connect the shorting strap (if not

h.

already connected). Depress AQ

button and adjust AQ ZERO (COARSE and

FINE) controls so that meter pointer indicates zero (full scale) on AQ scale.

Note

Press AQ button to release AQ

function and recheck for correct

resonance. Again depress the AQ

button and recheck for AQ zero

indication.

Disconnect the shorting strap.

1. panel Q meter AQ reading. pointer scales out at the left end of the scale (AQ full scale), reset the function to normal Q measurement. The difference in Q is calculated from the two Q values as AQ = Q1 - Qz.

.

Equivalent resistance of the capacitor

7. at the resonant frequency is:

Rs =

Where, w = 27rfo.

AQ

JJJCIQIQZ

. . . . . . . (eq. 3-41)

PI

If L/C

Note

If meter

3-25

Section III Paragraphs 3-80 and 3-81

Model 4342A

Series Connection Measurements

3-80.

3-81.

using a reference inductor, a resistor placed

in series with the reference inductor will lower the indicated Q in proportion to the

resistance value of the sample.

tion of Q is utilized to measure the resist-

ance. To avoid a significant increment of measurement error, the measurement should be made for resistors within a reasonable range.

For low resistance,

cated Q should be greater than the Q meter

resolution, that is, 0.1 on AQ = 3 range, 0.3

on 10 range, 1 on 30 range and 3 on 100 range,

respectively. For high resistance, the indi-

cated Q should be higher than 10 when the

sample is connected. See Figure 3-5 for the

suitable sample value range.

To measure low resistances, proceed as

follows:

Low Resistance Measurement.

\lrhen measuring circuit is resonated

This reduc-

the change in the indi-

Depress

a.

RANGE button and set FREQUENCY dial control for the desired measurement frequency.

Select a suitable reference inductor so

b.

that relatively high resistances are measured with a low tuning capacitance and low resistances are measured with a high tuning capacitance. unknown resistor in series with the reference inductor (between measurement LO terminal and low potential end of the reference inductor) and to measurement COIL (HI and LO) terminals.

If 16014A Series Loss Test Adapter is available, attach it to measure-

ment COIL terminals. Connect the

reference inductor to appropriate terminals of the 16014A and unknown

resistor to 16014A series connection terminals.

Short-circuit the unknown (series con-

C.

nection terminals) with a heavy (low

impedance) shorting strap.

the

appropriate FREQUENCY

Note

Connect

Depress AQ button and adjust AQ ZERO

e.

(COARSE and FINE) controls so that

meter pointer indicates zero (full

scale) on AQ scale.

Note

Press AQ button to release AQ function and recheck for correct resonance. Again depress the AQ button and recheck for AQ zero indication.

Disconnect the shorting strap. Again

f.

resonate the measuring circuit by adjusting L/C dial and AC dial controls.

Note sum of the C dial and AC dial readings as C2 and panel meter as AQ

reading. at the left end of the scale ( AQ full

scale), reset the function to normal Q measurement. is calculated from the two Q values as AQ = Ql - 42.

This procedure (steps c, d and f) permits the unknown component to be physically connected even though it

is electrically out of the circuit, and eliminates possible errors by maintaining the relative positions of the reference inductor and unknown component.

The resistance of unknown resistor is:

22.

Rs= z

Where,

frequency.

42 = Ql - AQ

If the unknown is purely .resistive

(C2 = Cl), the equation for resist-

ance reduces to:

Rs =

If meter pointer scales out

The difference in Q

Note

Cl

Ql

-

t 1

WCIQIQZ

w= 2~r times the measurement

AQ

wClQlQ2

42

(a) . .

(Q) . . . . . . . . . (eq. 3-43)

(eq. 3-42)

d. Adjust L/C dial and AC dial controls

for a maximum Q meter deflection.

Note sum of the C dial and AC dial

readings as Cl and panel meter reading as

Ql.

3-26

If the unknown is also reactive, the

reactance is:

Xs = '",',;,~" (a) . . . . . (eq. 3-44)

Model 4342A

Section III

Table 3-3.

Parallel Measurements Effective Q of Unknown

Q =

QlQ2

CC2

- Cl)

Formulas for Calculating Q and Impedance Parameters

from Parallel and Series Measurements.

AQCl

Effective Parallel Resistance of Unknown

Rp =

Effective Parallel Reactance of Unknown

xp=

Effective Parallel Inductance of Unknown

Lp=

Effective Parallel Capacitance of Unknown

QlQ2

oC,A&

o(C,

w2(C2

1

- Cl)

1

- Cl)

cp=c, -c,

Series Measurements

Effective Q of Unknown

Q = QIQZ (Cl -

Cl&l

Effective Series Resistance of Unknown

R S =

@Q1- Q2

w

CIQIQZ

Effective Series Reactance of Unknown

x S _ Cl - C2

Effective Series Inductance of Unknown

Effective Series Capacitance of Unknown

WClC2

L S = Cl - C2

W2ClC2

cs =

Cl C2

c,

C2)

- C2Q2

- Cl

Note

In the equation for Xp, the polarity (sign) of the quantity (CZ-Cl) indicates the effective reactance, a positive quantity indicates an inductive reactance and a negative quantity indicate a capacitive result.

Disregard the sign of the quantity

(C2-Cl) in the equation above for Q.

Table 3-4.

Q-e-““- l Rp=i!k=

PARALLEL TO

SERIES

CONVERSION

R, = -!fk

1 + Q2

Xs=Xpl+Q2

Q2

Formulas for Formulas for SERIES TO

Q greater Q less

than 10 than 0. 1

Rs=g-

x, = xp X, = XpQ2

Note

In the equation for Xs, the polarity (sign) of the quantity (Cl-C2) indicates the effective reactance, a positive quantity indicates an inductive reactance and a negative quantity indicate a capacitive result.

Disregard the sign of the quantity

(Cl-C2) in the equation above for Q.

Formulas Relating Series and Parallel Components.

L

ll-

S

L

c

r

Formulas for Formulas for

Q greater Q less

than 10 than 0. 1

xp= x,

Rs

R, = Rp

wCsRs =xp

WLP

RpwCp+ =

PARALLEL CONVERSION

Rp = R, (1 + Q2) Rp = RsQ2 Rp= R,

xp= x&g

xp=gf-

Ls = LP 1 +

‘, = ‘p Q2

1 + Q2

Q2

L, = Lp L, = LpQ2

cs = cp

Q2

Lp=LsQ2

cp=cs1+&2

1

+Q2

Q2

LP’ L,

cp= cs

Lp=$-

Cp = CsQ2

Section IV Figure 4-1, 4-2

Model 4342A

I I

Figure 4-l. Series Resonant Circuit

-------

I-

oSC’LLAToR - AMPLIFIER

I AMPLIFIER I

OSCILLATOR

t

ALC

--------

POWER

DETECTOR h

l- ----------------

-----------------

r

Q - VOLTMETER

I

I I

I ”

L----------------:

DETECToR - AMP::FlER T I

* AMPIFFIER

9

-@

1

i -

I

w

* ATTENUATOR

I I

I

I I

-I

1

,I

=

I

0 RANGE

----

II

I SHIELD I

L-o

Y

I

--

L 1

‘--i

---------w-

I-

- I

I

0

I I

I

I I I

L ---a---------

RESONANT CIRCUIT

z

1

I I I I I

I

J

4-o

) QLIMIT

SELETOR

Figure 4-2. Model 4342A Simplified Block Diagram

Model 4342A

Section IV

Paragraphs 4-l to 4-13

SECTION IV

THEORY OF

4-I. INTRODUCTION

4-2. This discussion of the HP Model4342A Q Meter internal operation is divided into two parts: Block diagram description and circuit description. The

block diagram section discusses the functions of the

major circuitswithin the instrument, using the overall block diagram. The circuit description provides a detailed description of all the major circuits within the instrument. It is suggested that the block diagram and schematics which have been included in this manual be referred to while reading the circuit description. A Functional Overall Block Diagram of the instrument, showing all the major circuits and associated relevant information is provided in Section VIII at the back of the manual. Also in Section VIII, there are complete schematics of all the circuitry within the Model 4342A which include components, reference designators, and values.

4-3. Q DETERMINATION AND MEASUREMENT. 4-4. The ratio of a component’s reactance to its

resistance is measured by the Q meter. The magnitude of Q is usually considered a figure of merit expressing the ability of component to store energy compared to the energy it dissipates. A measure of Q is important to determine the RF resistance of components, the loss angle of capacitors, dielectric constants, transmission line parameters and antenna characteristics, etc. Q is a dimensionless number. In acircuit at resonance, &can bedefined as the ratio of total energy stored to the average power dissipated per cycle.

Where Xs and Xp are series and parallel reactance and Rs and Rp are series and parallel resistance, The most common form of Q meter uses a series resonant circuit to measure Q, as shown in Figure 4-l.

4-5. When the variable air capacitor C is adjusted

so that Xc = XL, the only remaining impedance in the

loop is Rs.

For a single reactance component:

Q = Xs/Rs = Rp/Xp

The current that flows then is;

e

i=Fik

and the voltage E across capacitor C is;

E = &. Xc and-$=g=$$=

This equation is correct for values of QZlO, for it

can be shown that the true

the Q meter is equal to held at a constant and known level, a voltmeier with high input impedance can be connected across the

capacitor and calibrated directly in terms of Q. The

e values in the above equations are functions of selected Q ranges. Rs is a function of the unknown inductor or Q reference coils. A detailed explanation

$y$y b,;~;pgfy~ ;;

Q

OPERATION

for the measurement of unknowns is provided in

SECTION III.

4-6. SIMPLIFIED BLOCK DIAGRAM

4-7. The measurement principle used in the Model

4342A is the series resonant circuit. A simplified block diagram of the Q Meter is shown in Figure 4-2. The oscillator which covers 22kHz to 70MHz(lOkHz to 32MHz in Option OOl), is automatically leveled by

a loop consisting of the detector and the ALC amplifier. The oscillator output is controlledautomatically by comparing it to a fixed dc level. Thus, constant voltage is supplied to the Q-range attenuator.

attenuator adjusts the signal level according to the Q range settings. This signal is fed into the resonant

circuit by a transformer (sometimes called an injec-

tion transformer). Resonance is acheived by adjusting

the variable capacitor, and this level is read by the

high-impedance voltmeter. Thus the Q value of the

resonant circuit is indicated on the meter.

4-8. BLOCK DIAGRAM DESCRIPTION

4-9. TheModel4342A Q Meter performsQmeasure-

ment in the range of 5 to 1000 on coils in seven bands

covering a frequency range from 22kHz to 70MHz

(1OkHz to 32MHz in Option 001). The following paragraphs contain a brief outline of function of the major circuit groups in the Q Meter. Reference is made to the Functional Overall Block Diagram in SECTION VIII.

4-10. OSCILLATOR AND IMPEDANCE

CONVERTER (AlAll

4-11. The Oscillator circuit QI-Q2 is a seven-band variable frequency oscillator covering a frequency range from 22kHz to 70MHz (1OkHz to 32MHz in Option

001). The instrument utilizes a Hartley type circuit which operates from 22kHz to22MHz(lOkHz to 1OMHz in Option OO1)and a Colpitts type circuit from 22MHz to 70MHz(lOMHz to 32MHz in OptionOOl). The FREQUENCY RANGE switch provides for the selection of the desired band of operation. The output amplitude

of the oscillator is automatically controlled by an ALC loop Q9-Q13(P/O A8) to provide the injection voltages required by the Q ranges used. The oscillator output is further coupled to a high impedance circuit Q3-Q6 which provides a buffer stage between the oscillator

and the RF power amplifier assembly. 4-12. RF POWER AMPLIFIER(AlA21

4-13. The RF Power Amplifier assembly consists of a cascade amplifier circuit &l-Q2 with a gain of about

18dB and an impedance converter Q3-Q4. Commonly

called a cascade, the circuit uses an emitter grounded amplifier followed by a grounded base stage. The circuit has excellent noise figure, broadband characteristics, and is very stable. The impedance con-

The

4-l

Section IV

Paragraphs 4-14 to 4-30

Model 4342A

verter Q3-Q4 consists of a pair of emitter followers

connected in series which provides ahigher input im-

pedance and lower output impedance.

4-14. ALC AMPLIFIER(P/O A81 4-15. The ALC Amplifier circuit Q9-Q13 provides

the appropriate correction signal to the Oscillator assembly(AlA1) in order to control the oscillator output in accordance with the fixed reference dc level

set by the OX LEVEL control. 4-16. Q,‘nQ RANGE ATTENUATOR(A3)

4-17. The Q RANGE Attenuator consists of four switches which provide a total attenuation of 30.4dB. An additional switch is used for the AQ measurement. The Meter Scale Indicator (Al 1) ganged with Q RANGE switches, utilizes four lamps, two of these lamps are used for the Q scale display and the other two for the n Q scale. The attenuator output is fed to an Impedance Converter(A4) which consists of transistors Ql and Q2 and which is similar in operation to the one described in paragraph 4-13.

4-18. TUNING CAPACITOR AND INJECTION

TRANSFORMER(A2)

4-19. The Tuning Capacitor sometimes referred to as the Q Capacitor is an important part of the QMeter. It is the reactance standard in the Q measurement. Because the Q Capacitor can be calibrated precisely, the Q Meter provides direct reading of inductance in

addition to Q. To achieve this high accuracy, the capacitor is designed with low loss and low residual inductance.

Minimum capacitance is low to maintain accuracy at high frequencies. The Q Capacitor covers a range of 2OpF to 475pF. Residual inductance is less than 10nH.

4-20. The Model4342A uses a new method of injecting a constant voltage through a transformer as shown in Figure 4-3, which has very low output impedance. The transformer has a toroidal core and nearly flat frequency reaponse from 1OkHz to 70MHz. The LO terminal consists of a one-turn secondary winding which has an output impedance of approximately 1 milliohm. High measurement accuracy is thus achieved.

4-21. RF AMPLIFIER AND DETECTOR(A5)

4-22. The RF Amplifier and Detector assembly in-

cludes the Impedance Converter, the RF Amplifier,

and the Detector circuits. The impedance converter Ql-Q4is a”unity”gain buffer stage amplifier between the Tuning Capacitor assembly A2 and the RFAmplifier Q5-Q9. It provides a high input impedance and a low output impedance similar to what has been de-

scribed in paragraph 4-13.

4-23. The RF Amplifier circuit Q5-Q9 is a highgain and broad band amplifier. The frequency response of the amplifier is flat and covers the entire spectrum

range given in the specifications, while broad band RF transistors supply power gain. The approximate gain is about 34dB. The amplified signal is detected

by diodes CR2-CR5 and coupled to the DC Amplifier

assembly A6. 4-24. DC AMPLIFIER(A6)

4-25. The DC Amplifier Ql-Q5 provides a gain from

0 to 20dB. It is used to drive linearly the meter. Various gain adjustment, balance control, aQ COARSE AND FINE adjustments, METER ZERO ADJUST, and

A Q function are provided for in this assembly. A Q

ANALOG OUTPUT is also supplied which can be interfaced with other instruments. Frequency signals down to and including dc can be handled by theamplifier. By combining direct coupling with a resistive feedback circuit, good stability is obtained.

4-26. Q LIMIT SELECTOR(A7)

4-27. The Q Limit Selector assembly includes acomparator circuit Ql-Q3, a Schmitt trigger Q4-Q5, a

monostable multivibrator Q6-Q7 and a driver Q8-Q9.

The comparator compares the output of the detected

RF signal with the Q LIMIT setting. Thecomparator

output is then coupled via an emitter follower to the

Schmitt trigger which generates a fast rise pulse out-

This signal is coupled to the monostable multi-

put.

vibrator which has a fixed time constant of 1 second,

and also supplies the necessary drive signal to the

driver stage. An OVER LIMIT SIGNAL OUTPUT and

DISPLAY TIME(l set Oreo) are provided.

4-28. CIRCUIT DETAILS

FROM

OSCILLATOR

yy$(Y-zq

Z-Y

50:1

1twcT10N TRANSFORMER

Figure 4-3. Constant Voltage Injection System

4-2

4-29. LC OSCILLATOR(P/O AlAl) 4-30. FREQUENCY RANGE switches select the ap-

propriate LC circuit, setting the operating frequencies of the oscillator &l-&2. In the Hartley configuration, when an RF current flows in the tuned circuit, there is a voltage drop across L. The tap on the Lcoil will be at an intermediatepotentialwith respect to the two ends of the coil. The amplified current in the Q2coIlector circuit, which flows through the bottom section

of L, is in phase with the current already flowing in the circuit and thus in the proper relationship for positive feedback. The Colpitts arrangement uses the voltage drops across the two capacitors Cl8 and Cl9

in series in the tuned circuit to supply the feedback,

Other than this, the Colpitts operation is the same as

just described for the Hartley configuration.

Model 4342A

Section IV

Paragraphs 4-31 to 4-45

4-31.

4-32. FET Q3 provides a high input impedance for the impedance Converter circuit. Transistor Q5 is used as a current source and Q4 provides positive feedback to make Q3 gain equal to unity. Emitter follower QS provides low impedance output signals to the RF Amplifier stage. Inductor L8 acts as a parasitic oscillation suppressor and C30 is a dc blocking capacitor. The signal from the Impedance Converter is ac coupled to RF Power Amplifier Q2 via C2. Transistors Ql and Q2 form a cascade stage as previously

described in paragraph 4-12. Resistor Rll and C6 form a frequency compensation network and C5 is a bypass capacitor. Transistors Q3 and Q4 form an Impedance Converter as described in paragraph 4-

12. Inductor Ll and L4 are parasitic oscillation

suppressors.

4-33. ALC AMPLIFIER(P/O A81 4-34. Transistor Q9 thru Q13 form the ALC Ampli-

fier assembly. FET Q9Aand Q9Bform a differential

amplifier with Qll as its current source.

of the rectified RF Amplifier signal is taken across diode A3CRl and coupled to FET Q9B. Transistors QlO and Q12 form another differential amplifier with Q13 as its current source. The drain output signal

of FET Q9B turns on transistor Q12. flowing through the collectors of transistors AlAlQl

and AlAlQ2 is caused to vary by the setting of the OSC LEVEL control R26. This variation in AlAlQl collector current causes a change in the tuned circuit current and the gain of the Oscillator is thereby con-

trolled. Cl0 provides ac feedback and circuit stabilization.

4-35. Q RANGE ATTENUATOR(A3l 4-36. The Q Range Attenuator with a total attenuation

of 30.4dB covers the entire frequency range. The following steps of 10.4dB, 9.6dB, and 10.4dB are provided to correlate the meter reading with the Q Ranges used in the proper ratio (ie. 30/3, lOO/lO, etc. ). The maximum insertion loss is 0. 1dB and the impedance is 50R nominal. The Q Attenuator output is coupled to Impedance Converter A4 which is arranged in a Darlington pair configuration.

4-37. IMPEDANCE CONVERTER, RF AMPLIFIER

4-38. The Impedance Converter Ql-Q4 is identical in operation to the description given in paragraph 4-32. Diode CR1 protects Q4 from initial current surge. TransistorsQS-Q9 provide RF amplification for the broad bandRF fraquencieswith a total gain of approximate 34dB. Variable resistor R32 and variable capacitor Cl6 provide for the adjustment of me-

dium and high frquency response of the amplifier

respectively. A flat response is obtained through out the entire frequency band. The signal is ac coupled to detector diode CR2 via C19. Capacitor C20 pro-

vides filtering action. Diodes CR3 thru CR5 in conjunction with R42 and R43 cancel the non -1inearities of diode CR2. A linear reading is provided to the

meter circuit.

IMPEDANCE CONVERTER(P/O Al Al) AND RF POWER AMPLIFIER(AlA2)

A portion

The current

AND DETECTOR(A5J

4-39. DC AMPLIFIER(A6) 4-40. FET Ql supplies &ANALOG OUTPUT propor-

tional to the meter deflection to Jl connector. Variable resistors R4 and R6 are used for the settings of the &ANALOG OUTPUT-BALANCE and GAIN respectively. FET Q2Aand Q2Bform adifferential amplifier with transistor Q4 as a current source. Diode CR1 compensates for temperature changes. Q3 and Q5

supply current drive to the meter. Resistors R2 and R21 provide for Xl GAIN and X10 GAIN adjustments respectively. Zenor diode CR2 and CR3 are used to regulate for the +25V and -25V supplies, inductors Ll, L2 and capacitors C2, C3 are used to obtain additional filtering of meter circuit supply voltages. Resistor R2 (mounted on chassis) provides for METER

ZERO adjustment. Resistors R3 and R4(mounted on chassis) are used for the adjustments respectively.

4-41. Q LIMIT SELECTOR(A71 4-42. High impedance FETs Ql and Q2 form a com-

parator circuit. Emitter follower Q3 dc couples the comparator output to the Schmitt trigger Q4 and Q5. Capacitor C2 is used as a negative feedback path to reduce the ripple voltage at Q3 emitter. Transistors Q4 and Q5 provide Schmitt trigger action. When Q4

base voltage reaches 9V, the transistor will turn on

and Q5 which is normally on will turn off. going pulse will be generated and coupled via capacitor C3 and diode CR3 to the one-shot multivibrator QS and Q7. Normally, transistor Q7 is on and Q6 is cut off by the voltage drop across the common bias resistor R19. The pulse from Q5 turns onQ6 which in turn switches off Q7 for one second. Capacitor C6, resistors R20, R21, and R22 determine the constant of the circuit. Transistor Q8 turned on by the rise in Q7 collector voltage operates Kl the OVER LIMIT DISPLAY relay. Transistor Q9(normally on) is used for

00 OVER LIMIT DISPLAY TIME. Diodes CR5 and CR6 protect Q8 and Q9 against initial line transient when the instrument is turned on.

4-43. POWER SUPPLY(P/O A8) 4-44. Description of the Power Supply operation will

pertain to the +25 volt supply. For the negative supply,

operation will be identical but with reversed polarities. Rectifiers CR1 thru CR4form a fullwave bridge rectifier for the +25 volt supply.

two rectifiers operate in series on each half of the

cycle, one rectifier being in the lead to the load; the other being in the return lead.

4-45. Pulsating(rectified) dc at the output of the fourdiode rectifier bridge is applied to the collector of the series regulator Ql. Closely matched transistors

Q2, Q5 and Q3, Q4 form differential amplifier with

high common mode signal rejection. The output voltage is applied across Rll, R12, and R13 a voltage divider, such that some fraction of this voltagewill

be applied to the base of Q5. the base of Q5 increase, its collector will gomore negative. This negative going signal will be applied through emitter follower Q4 and cause Q3 collector

to go negative. The negative going signal from Q3 is coupled through emitter follower Ql and seriesregu-

later Ql (mounted on chassis). Subsequently the signal

AQ ZERO FINE and COARSE

A positive

In this arrangement

Should the voltage at

4-3

Section IV

Paragraph 4-46 at the base of Ql will increase the effective resistance

of series regulator.

Model 4342A

4-46. The rectifier output is continually changing, as it is a pulsating current.

feeding the series regulator is continually compen-

sating for this pulsation, effectively smoothing the rectifiers output. Capacitor C2 (mounted on chassis) sets ac output impedance. Zenor diode CR5 provides

constant basevoltage toQ2. Diode CR6 protects tran-

sistor Q3 against transients. Diodes CR7, CR8, and

CR9 provide current limiting in the event of a grounded

output. As stated earlier the operation for the negative supply is identical to the positive supply, except that only one differential amplifier is used in the circuit.

Thus the amplifier chain

4-4

Section V Table 5-l

Model 4342A

Table 5-l. Recommended Test Equipment.

Instrument Type

AC Voltmeter

RF Voltmeter

Digital

Voltmeter

Frequency Counter

Test Oscillator

RF Oscillator

Oscilloscope

Required Performance

Frequency Range: Voltage Range: lmV to 1V Accuracy: 1% at 200kHz.

Frequency Range:

Voltage Range:

Frequency Flatness:

Voltage Range:

DC Voltage Accuracy: AC Frequency Range: AC Voltage Accuracy:

Frequency Range: Sensitivity: 50mV

Frequency Range: 1OkHz Output Voltage: Distortion:

Frequency Range: 1OOkHz to 70bIHz output: l.OV max.

Bandwidth: 5OMHz Sensitivity: SmV/cm

Input Impedance: 1MR

1OkHz to 1MHz

500kHz to 1OOMHz 1OmV to lV

kl%

0.11,' to 1OOV dc

0.1% of reading <lOOkHz

1% of reading

1OkHz to 80111112

to

1OOkHz l.OV max. less than 1%.

Recommended Model

HP 400E

HP 3406A (with known frequency flatness)

HP 3456A

-

HP 5381A

-

HP 651B

HP 8601A

-

HP 180C with

1801A and 1821A Plug-ins

Impedance

Meter

Reference Inductor

5OQ Resistor

5-o

Frequency: 1OOkHz Full Scale Range: 500pF Accuracy: 0.3%

Frequency Range: 1lOkHz to 3OOkHz

higher than 100

Q:

Metal Film 0.5% 1/4W

HP 4192A

-

HP 16475A

-

HP P/N 0698-5965

Model 4342A

Section V

Paragraphs 5-l to 5-8

SECTION V

MAINTENANCE

5-1. INTRODUCTION.

5-2. This section provides the instructions and information required to maintain the HP

Model 4342A Q Meter. Included are Performance

Checks, Adjustment and Calibration Procedures, Servicing and Troubleshooting guides.

5-3. TEST EQUIPMENT REQUIRED.

5-4.

Model 4342A are listed in Table S-l. The

table lists the type of equipment to be used, the performance requirements and recommended model. If the recommended model is not available, equipment which meets or exceeds

the critical performance may be substituted.

5-5.

5-6. A Q Meter theoretically measures the comprehensive Q of a circuit. In practice, residual circuit parameters, which do not exist in ideal circuits, contribute to meas-

ured Q values.

inductance in series with the COIL terminals,

The equipment required to maintain the

Q ACCURACY CONSIDERATIONS.

Insertion resistance, residual

Table 5-2. Q Correlation Factors.

Q voltmeter input conductance, and tuning

capacitor loss are some of the factors that contribute to measurement errors in the practical measurement of Q in a typical circuit.

These errors can be minimized by the use of a

low output impedance injection transformer

system,

voltmeter which has a low input conductance, as in the Model 4342A. Consequently, the 4342A will indicate higher Q values than other currently available Q meters.

By assuming that no internal circuit loss exists in the Q Meter, the specified Q accuracy can be guaranteed by performing the adjustment and calibration procedures in this section. actual internal loss of the instrument into

account is required, a Q value reading check with Q standards (inductors) should be done

in addition to the adjustment and calibration

procedures described in paragraphs 5-9 and those which follow.

At the present time, no Q standards are available for users, thus a Q accuracy check with Q standards can not be performed at the facility where the instrument is used. Since, Hewlett-Packard, however, maintains Q standards traceable to NBS (National Bureau of Standards) in its major service offices, a calibration service with authorized Q standards for the 4342A is always available. If a Q accuracy check is needed, contact your nearest HewlettPackard office. If HP Models 513A/518A Q standards are owned and maintained, a Q ac-

curacy check for the 4342A can be done at the user’s location. Refer to Table 5-2 for Q Correction Factors.

a low loss tuning capacitor, and a Q

If a Q calibration, which takes the

30

MHz

45

MHz 1.37

1.17

* Correlation Factor x Indicated Q - Value on513/

518 = 4342A Indicated Q-Value.

5-7.

5-8. The calibration and adjustment pro-

cedures for Option 001 instruments (that

differ from the standard Model 4342A) are provided in paragraphs 5-25 and below.

OPTION.

5-1

Section V Table 5-3 and Figure 5-I

Model 4342A

Table 5-3. Frequency Accuracy Check.

I

Frequency

Range

22k - 70k

70k - 220k

220k - 700k

700k - 2.2M

2.2M - 7M

7M - 22M

Frequency Measured

Dial Setting Accuracy

2.2 L

5.0

7.0

7.0 L *l. 0% 15 22

*l. 5%

il. 0%

il. 5% &l. 5%

il. 5% 68.950 - 71.050 kHz

il. 5% 147.75 - 152.25 kHi il. 5% 216.70 - 223.30 kHz

Counter Reading

21.670 - 22.330 kHz

24.922 - 25.424

49.250 - 50.750 kHz

68.950 - 71.050

78.822 - 80.413

216.70 - 223.30 kHz

249.22 - 254.24 kHz

492.50 - 507.50 kHz

689.50 - 710.50 kHz

788.22 - 804.13 kHz

1477.5 - 1522.5 kHz

2167.0 - 2233.0

2167.0 - 2233.0 kHz

2492.2 - 2542.4

4925.0 - 5075.0 kHz

6895.0 - 7105.0 kHz

7882.2 - 8041.3 kHz

14.775 - 15.225

21.670 - 22.330 MHz

kHz kHz

kHz

MHz

22M - 70M

-yl

4342A

21.560 - 22.440 MHz

24.922 - 25.424 MHz

49.000 - 51.000 MHz

68.600 - 71.400 MHz

r

DIGITAL VOLTMETER

@1@

JpqL!J

(REAR PANEL)

5-2

Figure 5-l. Q Range Check.

Model 4342A

Paragraphs 5-9 to 5-12 '

Section V

5-9. PERFORMANCE CHECKS.

S-10. The Performance Checks compare the

4342A instrument with its specifications. These checks are used in incoming inspection, periodic maintenance, and after a repair.

Before beginning the Performance Checks, do mechanical and electrical meter zero adjustments using the procedure in Figure 3-6.

5-11. FREQUENCY ACCURACY CHECK. An electronic frequency counter is required

for this check.

Connect frequency counter to 4342A

a.

rear panel FREQUENCY MONITOR connector. Set 4342A controls as follows:

b.

FREQUENCY RANGE

........

22k to 70k

FREQUENCY dial ................ 2.2

Other controls Frequency counter reading should be

C.

....... any settings

within 21,678kHz to 22,320kHz.

Check frequency at each frequency set-

d.

ting in accord with Table 5-3. Counter readings should be within the tolerance limits given in Table 5-3.

a. Connect an

and

GND

5-1. Connect Digital Voltmeter to

AC

Voltmeter to 4342A LO

terminals as shown in Figure

AC

Voltmeter dc output terminals.

b. Set 4342A controls as follows:

FREQUENCY RANGE

FREQUENCY dial Q RANGE Q LIMIT

........................ 30

........................

....... 70k - 220k

................. 20

CW

L/C dial ................... 25(pF)

AC dial .........................

Set AC Voltmeter range to 30mV and

C.

0

Digital Voltmeter to 1V. Digital Voltmeter reading should be between

920.6 and 977.4mV.

Set Q RANGE and

d.

accord with Table 5-4.

AC

Voltmeter range in

Digital Volt-

meter reading should be within the

tolerance limits given in Table 5-4.

Table 5-4. Q Range Check.

, ( Q Range ( Vgzr / Digit:ztyter (

1

5-12.

An

Q RANGE CHECK.

AC

Voltmeter and a Digital Voltmeter are

required for this check.

1000 1 mV 873.0 - 927.0 mV

I

G -

d DC OUTPUT

Figure 5-2. AQ Range Check.

DIGITAL VOLTMETER

uzl @I

(REAR PANEL)

I

5-3

Section V Paragraphs 5-13 to 5-14

5-13. AQ RANGE CHECK.

An AC Voltmeter, a Digital Voltmeter, and a

Reference Inductor are required for this check.

a. Connect the AC Voltmeter to 4342A HI

and GND terminals and place the Reference Inductor in the HI and LO terminals as shown in Figure 5-2.

Monitor DC voltage at AC Voltmeter dc output terminals with Digital Voltmeter.

Model 4342A

Set Q/AQ RANGE to AQlO and adjust AQ

g.

ZERO control (coarse and fine) so that Q meter indicates 0 (full scale) on AQ scale.

Adjust AC dial so that Q meter indi-

h.

cates 10 on AQ scale and note Digital

Voltmeter reading. It should be within

801.9mV to 818.lmV.

Set 4342A controls as follows:

b.

FREQUENCY RANGE . . . . . . . . 70k - 220k

FREQUENCY dial . . . . . . . . . . . . . . . . . 20

Q RANGE . . . . . . . . . . . . . . . . . . . . . . . 100

Q LIMIT . . . . . . . . . . . . . . . . . . . . . . . . CW

L/C dial . . . . . . . . . . . . . . . . . . . 25(pF)

AC dial . . . . . . . . . . . . . . . . . . . . . . . . . 0

C.

Set AC Voltmeter range to 1V.

d. Adjust L/C dial so that 4342A meter

pointer indicates 100 (need not indi-

cate a peak value).

Adjust to exactly

100 with the AC dial.

Digital Voltmeter reading should

e.

within 873mV to 927mV. Adjust L/C dial for 900.0mV on Di

f.

Voltmeter display.

Use AC dial

accurate adjustment.

be

gital for

5-14. CAPACITANCE ACCURACY CHECK.

An Impedance Meter is required for this check.

a. Connect Impedance Meter to 4342A HI

and GND terminals as shown in Figure 5-3.

Note

When the Model 4192A is used for this check, set panel controls as

follows:

DISPLAY A . . . . . . . . . . . . . . . . . . . . . . . C

ZY RANGE . . . . . . . . . . . . . . . . . . . . . AUTO

CIRCUIT MODE . . . . . . . . . . . . . . . . . AUTO

FREQUENCY . . . . . . . . . . . . . . . . . . 1OOkHz

OSC LEVEL . . . . . . . . . . . . . . . . . . . . . . 1V

CABLE LENGTH . . . . . . . . . . . . . . . . . . . lm

5-4

Figure 5-3.

IMPEDANCE METER

Capacitance Accuracy Check.

Section V Figures 5-4 and S-5

0 - PRESET METER

VERNIER ZEW&DJ C$CR;yEL

A7 R7

I

- E-%J

+ZvR?iJ

O-PRESET

(A7 R3)

Top View

Bottom View

5-6

Figure 5-4.

Model 4342A Adjustment Locations.

Model 4342A

Set 4342A controls as follows:

b.

Section V

Paragraph 5-15

5-15. Q LIMIT OPERATION CHECK.

L/C dial . . . . . . . . . . . . . . . . . . . 25(pF)

AC dial . . . . . . . . . . . . . . . . . . . . . . . . . 0

Other controls . . . . . . . any settings

Capacitance Bridge reading should be

C.

between 23.9 and 26.lpF.

d. Check capacitance on each L/C dial and

AC dial setting in accord with Table 5-5.

Capacitance Bridge readings

should be within the specified tolerance limits given in Table S-5.

Table 5-5. Capacitance Accuracy Check.

( Z Dial AC Dial C-Bridge Reading

25 0 23.9 - 26.1 25 -5 (0 Reading)* - 520.1

25 +5 (0 Reading)* + 520.1

100

0 98.9 - 101.1 200 0 197.9 - 202.1 300 0 296.9 - 303.1 400 0 395.9 - 404.1 470 0 465.2 - 474.8 470 +5 (0 Reading)* + 5tO.l

* Note: 0 Reading is the readout on the

Capacitance Bridge when AC Dial is set to 0.

A Reference Inductor is required for this

check.

Connect a Reference Inductor to 4342A

a.

HI and LO terminals.

Set 4342A controls as follows:

b.

FREQUENCY RANGE . . . . . . . . 70k - 220k

FREQUENCY dial . . . . . . . . . . . . . . . . . 20

Q RANGE . . . . . . . . . . . . . . . . . . . . . . . 100

Q LIMIT . . . . . . . . . . . . . . . . . . . . . . . . CW

L/C dial . . . . . . . . . . . . . . . . . . . 25(pF)

AC dial . . . . . . . . . . . . . . . . . . . . . . . . . 0

Set OVER LIMIT DISPLAY TIME switch on

C.

4342A rear panel toooposition.

Rotate L/C dial until Q meter pointer

d.

deflection exceeds full scale and

scales out.

Set Q LIMIT control dial to 60. OVER

e.

LIMIT lamp should light.

Adjust L/C dial so that Q meter pointer

f.

indicates approximately 50. OVER LIMIT lamp should be extinguished.

Rotate L/C dial so that Q meter indi-

g*

cation increases slowly as it approaches

60. The OVER LIMIT lamp should light

at or near a Q meter indication of 60.

5-5

Model 4342A

Top View

Bottom View

Figure 5-5. Model 4342A Assembly Locations.

Model 4342A

Section V

Table 5-6

Table 5-6. Adjustable Components.

Reference

Designator

AlAlCl, -c3,

-c5, -C7,

-c9, -Cll,

-Cl3

AlAlLl

thru

AlAlL

7

ASR32

ASR43 LINEARITY ADJ To adjust Q meter linearity to maximize

A6R2

A6R4

Name of Control

I

FREQ. ADJ C To adjust oscillator frequency of upper range

FREQ. ADJ L To adjust oscillator frequency of lower range

HIGH FREQ. ADJ To adjust Q meter sensitivity in high frequency

MED FREQ. ADJ To adjust Q meter sensitivity in high frequency

Xl GAIN To set Q meter full scale sensitivity to

REC BAL To set Q ANALOG OUTPUT dc voltage at rear

I

limits of individual frequency ranges to

maximize frequency accuracies.

limits of individual frequency ranges to

maximize frequency accuracies.

(7OMHz) region to obtain optimum frequency

flatness.

(2OMHz) region to obtain optimum frequency

flatness.

measurement accuracy.

maximize measurement accuracy.

panel to zero volts at Q meter zero scale

deflection.

Purpose

A6R6

REC GAIN

I::

A6R21 X10 GAIN To adjust AQ measurement full scale sensitivity

A7R3

A7R7 Q-PRESET

A8R12

-RZl

A8R26

I

Q-PRESET To properly set Q limit selector sensitivity at

VERNIER

+25V ADJ

-25V ADJ

OSC LEVEL

To set Q ANALOG OUTPUT dc voltage at rear panel (to 1 volt) at Q meter full scale

deflection.

to maximize AQ measurement accuracy.

Q LIMIT dial full scale setting to maximize the dial scale accuracy.

To properly set Q limit selector sensitivity at

Q LIMIT dial center scale setting to maximize the dial scale accuracy.

To set +25V and -2SV output voltages of dc power supply.

To adjust oscillator output voltage to maximize measurement accuracy.

I

5-7

Section V Paragraphs 5-16 to S-20

5-16.

ADJUSTMENT AND CALIBRATION PROCEDURES.

Adjust ASR21 (-25V ADJ) for a reading

e.

of -25V _+O.O25V on DC

Voltmeter.

Model 4342A

5-17.

These paragraphs describe complete

adjustment and calibration procedures for the

Model 4342A. The procedures should be per-

formed when any performance test fails or

when it is known that the instrument does not

meet the specifications or may be necessary after certain repairs.

Table 5-6 is a sum-

mary of the purpose of each adjustment and

its effect on instrument performance.

Adjustment and assembly locations are shown

in Figure 5-4 and 5-5, respectively.

WARNING

ADJUSTMENTS DESCRIBED IN THIS SEC-

TION ARE ALLOWED FOR QUALIFIED TECHNICAL PERSONNEL ONLY.

WARNING

ADJUSTMENTS DESCRIBED HEREIN ARE

PERFORMED WITH POWER SUPPLIED TO THE

INSTRUMENT AFTER PROTECTIVE COVERS HAVE BEEN REMOVED. ENERGY EXISTING AT MANY POINTS MAY, IF CONTACTED, RESULT IN PERSONAL INLJURY.

Preparatory to beginning adjustments, remove

top cover by removing the four retaining screws near side frames (both sides).

Remove

bottom cover with similar procedure.

5-18.

POWER SUPPLY ADJUSTMENT.

Note

Voltage ripple should be less than

0.35mVrms for both +25V and -25V

power supplies.

5-19.

OSCILLATOR LEVEL ADJUSTMENT.

An AC Voltmeter and a Digital Voltmeter are

required for this adjustment.

a. Connect AC Voltmeter to 4342A LO and

GND terminals as shown in Figure 5-l. Monitor dc voltage at AC Voltmater dc

output terminals with Digital Voltmeter.

Set 4342A controls as follows:

b.

FREQUENCY RANGE FREQUENCY dial

................

.........

22k - 70k

5.0

Q RANGE ........................ 30

Q LIMIT

........................

L/C dial ...................

25

cw

(PF)

K dial ......................... 0

Set AC Voltmeter range to 30mV and

C.

Digital Voltmeter range to 1V. Adjust A8R26 (OSC LEVEL adj.) for

d.

949.0mV -t5mV on Digital Voltmeter display.

A DC Voltmeter (or a DMM) is required for

this adjustment.

a. Turn 4342A power off.

Take out A8

Power Supply Assembly. Reinstall it

with an extender board. Turn instrument on. Connect DC Volt-

b.

meter plus input lead to plus terminal of capacitor A8C3 and minus input lead of voltmeter to chassis.

Adjust A8R12 (+25V ADJ) for a reading

C.

of +25 iO.025V on DC Voltmeter.

d. Connect DC Voltmeter minus input lead

to minus terminal of capacitor

A8C6

and plus input lead of voltmeter to names of FREQ AD-J potentiometers and chassis.

5-8

5-20. OSCILLATOR FREQUENCY ADJUSTMENT.

A Frequency Counter is required for this

adjustment.

a. Connect a frequency counter to 4342A

rear panel FREQUENCY MONITOR connector.

b.

Set

4342A controls as follows:

FREQIJENCY RANGE ......... 22k - 70k

FREQUENCY dial ................

2.2

Other controls ....... any settings

Remove instrument bottom cover and

C.

oscillator shield cover labeled with trimmer capacitors.

Model 4342A

Section V

Paragraph 5-21

d. Loosen all oscillator coil locking

nuts. Replace oscillator shield cover.

e. Adjust AlAlLl (see Figure 5-5, instru-

ment bottom view) for 22.000kHz

20.330kHz on frequency counter display. Set FREQUENCY dial to 7.0.

f.

Adjust AlAlCl for 70.000kHz +l.O50kHz

ET-

on frequency counter display.

h. Set FREQUENCY dial to "L" point.

1. Frequency counter reading should be within 24.922kHz to 25.420ktIz. If not,

repeat steps b through g. Check dial tracking throughout the

j.

22 - 70kHz frequency range. A compromise adjustment may improve tracking. Compare with Table 5-3.

k. Set FREQUENCY RANGE and FREQUENCY dial

in accord with Table 5-7 and adjust each individual adjustment control

(AlAlL through L7, C3, C5, C7, C9,

Cl1 and C13) for correct frequency

with procedures similar to steps b

through j.

1. Remove oscillator shield cover and carefully tighten all oscillator coil

locking nuts. Take care that potentiometer does not rotate with nut. Replace oscillator cover.

m. Recheck instrument against Table 5-7.

5-21. Q VOLTMETER ADJUSTMENT.

A Test Oscillator and a Digital Volemeter are required for this adjustment.

Note

Before proceeding with this adjust-

ment,

check meter mechanical and electrical zero using the procedure given in Figure 3-6.

1) Xl Gain and meter linearity adjustments. a.

Connect the Test Oscillator and the Digital Volemeter to 4342.A as shown in Figure 5-6.

Frequency

Range

22k - 70k

220k - 700k

2.2M - 7.OM

22M - 70M

70k - 220k

0.7M - 2.2M

Table 5-7.

Frequency Adjustment.

Frequency Measured

Dial Setting

2.2 22.000 50.330 kHz AlAlLl

7.0 70.000 rtl. 050 kHz AlAlCl “L” 25.173 *O. 251 kHz NONE

2.2 220.00 i3.30 kHz AlAlL

7.0 700.00 +lO. 50 kHz AlAlC5 “L” 251.73 *2.51 kHz

2.2 2200.0 k33.0 kHz AlAlL

7.0 7000.0 klO5.0 kHz AlAlC9

“L”

2.2 22.000

7.0 70.000 + 1.400MHz AlAlC13

“L”

7.0 70.000

22 220.00 *3.30 kHz AlAlC3 “L” 79.618

7.0 700.00 +lO. 50 kHz AlAlL

22 2200.0 “L”

Frequent y

2517.3 +25.1 kHz NONE + 0.440MHz Al Al L7

25.173 + 0.251MHz NONE il. 050 kHz Al Al L2 &O. 796 kHz NONE

k33.0 kHz AlAlC7

796.18 *7.96 kHz

Adjustment

NONE

7. OM - 22M

7.0 7000.0 k 105. OkHz AlAlL 22 22.000 k 0.330MHz AlAlCll “L” 7961.8 + 79.6kHz NONE

5-9

Section V Paragraph 5-22

Model 4342A

Set 4342A controls as follows:

b.

FREQUENCY RANGE . . . . . . . . . 22k - 70k

FREQUENCY dial . . . . . . . . . . . . . . . . 2.2

L/C dial . . . . . . . . . . . . . . . . . . . 25(pF)

AC dial . . . . . . . . . . . . . . . . . . . . . . . . -5

C.

Set the Test Oscillator frequency to

1OOkHz and adjust the signal level until the Digital Voltmeter reads 9OO.OmV.

d. Adjust A6R2 (Xl GAIN adj.) for full

scale Q meter reading.

e. Adjust the Test Oscillator's signal

level until the DVM reads 450.0mV.

f. Q meter should indicate exactly l/2

full scale. If Q meter deflection is insufficient, rotate ASR43 (LINEARITY

ADJ) CCW until meter reads correctly.

If deflection is excessive, rotate AS-

R43 slightly CW.

Repeat steps c through f until meter

g-

indicates l/2 full scale within

+O.S/lOO full scale (l/2 minor divi-

sion) in step f. Adjust the Test Oscillator's signal

h.

level until the DVM reads 300.0mV.

Q meter should indicate within l/3

1.

full scale ?l/lOO of full scale (1

minor division).

c through f.

If not, repeat steps

2) X10 GAIN adjustment. Adjust the Test Oscillator's signal

j.

level until the DVM reads 810.0mV. Depress 4342A AQ button and set

k.

RANGE to 10. Adjust AQ ZERO control for 10 (zero

1. scale deflection) on AQ scale.

m. Adjust the Test Oscillator's signal

level until the DVM reads 900.0mV.

Q meter should indicate 0 (full scale)

n.

on AQ scale. not zero, adjust A6R21 (X10 GAIN adj.)

for correct reading. through n because both adjustments interact.

5-22.

A Test Oscillator and a Digital Voltmeter are

required for this adjustment.

Q ANALOG OUTPUT

Set 4342A controls as follows:

a.

Q RANGE . . . . . . . . . . . . . . . . . . . . . . . . 30

other controls . . . . . . . any settings

Connect Digital Voltmeter to 4342A

b.

rear panel Q ANALOG OUTPUT connector. Adjust A6R4 (REC BAL adj.) for OV

C.

?O.OlV on Digital Voltmeter display.

If Q meter reading is

Repeat steps j

ADJUSTMENT.

AQ

S-10

TEST OSCILLATOR

1

4342A

Figure 5-6.

l-y

DIGITAL VOLTMETER

Voltmeter Adjustment.

Model 4342A

d. Connect the Test Oscillator to the

4342A as shown in Figure 5-6.

e. Set the Test Oscillator frequency to

1OOkHz and output for full scale reading (approx. 9OOmVrms) on 4342A Q meter.

f. Adjust A6R6 (REC GAIN adj.) for 1V

?O.OlV on Digital Voltmeter display. Repeat steps c through f because both

g.

adjustments interact.

Section V

Paragraphs 5-23 and 5-24

f. Adjust A5R32 (MED. FREQ. ADJ) for full

scale reading on 4342A Q meter. Set RF Oscillator frequency to 7OMHz

g.

and its output for the same RF Voltmeter reading as that noted in step d.

h. Adjust A5C16 (HIGH FREQ. ADJ) for full

scale reading on 4342A Q meter.

1.

Repeat steps c through h until both difference (from full scale) Q meter readings obtained in steps f and h are

within +2% of full scale. 5-23. FREQUENCY RESPONSE ADJUSTMENT. An RF Oscillator and an RF Voltmeter (with

known frequency flatness) are required for this adjustment.

a. Connect RF Oscillator and RF Voltmeter

as shown in Figure 5-7.

b. Set 4342A C and AC dials to minimum.

C.

Set RF Oscillator frequency to 1OMHz and its output for full scale meter deflection (approx. 9OOmVrms) on 4342A Q meter.

d. Note RF Voltmeter reading.

e. Set RF Oscillator frequency to 20MHz

and its output for the same RF Voltmeter reading as that noted in step d.

5-24. Q LIMIT

SELECTOR ADJUSTMENT.

An RF Oscillator is required for this adjustment.

a.

Set 4342A rear panel OVER LIMIT DISPLAY TIME switch toooposition.

b.

Connect RF Oscillator between HI and GND terminals.

Set 4342A Q LIMIT control to 100.

C.

d.

Set RF Oscillator to desired frequency

(100kHz to 1MHz) and adjust its output

for full scale reading on 4342A Q

meter. Rotate A7R3 (Q-PRESET adj.) CCW until

e.

front panel OVER LIMIT indicator

lights.

Figure 5-7. Frequency Response Adjustment.

RF OSCILLATOR

5-11

Section V Paragraphs 5-25 to 5-27

Model 4342A

Rotate A7R3 very slowly CW until OVER

f.

LIMIT indicator is extinguished. Set Q LIMIT control to 50. OVER LIMIT

g.

indicator should light. Decrease RF Oscillator output level

h.

and note 4342A Q meter reading at

which OVER LIMIT indicator just extin-

guishes.

Q Meter reading should be

approx. l/2 full scale (50 +5 divisions on meter top scale).

If Q Meter reading is low, rotate A7R7

1.

(Q-PRESET VERNIER) slightly CW and re-

peat steps c through h.

If Q Meter reading is high, rotate

1. A7R7 slightly CCW and repeat steps c

through h.

Table 5-8. Frequency Accuracy Check (Option 001).

5-25.

OPTION 001 MAINTENANCE INSTRUCTIONS.

5-26. This paragraph and those below des-

cribe the changes necessary for applying the Performance Checks and Adjustment and Calibration Procedures in this section (V) to Option 001 instruments.

5-27.

5-28.

OPTION 001 PERFORMANCE CHECKS.

To apply the Performance Check procedure in paragraphs 5-9 and below to option 001 instruments, make the following changes

in standard procedures:

a. Para. 5-11 b. Change the FREQUENCY

RANGE and FREQUENCY dial settings

to 10k - 32k and 1.0, respectively.

Para. 5-11 c. Change the upper and

Frequency

Range

10k - 32k

32k - 1OOk

1OOk - 320k

320k - 1M

1M - 3.2M

3.2M - 10M

Frequency

Dial Setting

1.0

1.5 *l. 5% L A. 0%

3.2 *1.50/o

3.2

5.0

L il.O%

10 A. 5%

1.0

1.5 L *1.00/o

3.2

3.2 *1.5%

5.0

L A. 0% 10 il. 5%

1.0 *1.50/o

1.5 L *1.00/o

3.2 *1.5%

3.2 *l. 5%

5.0 *1.50/o L il. 0% 10 A. 5%

Specified Accuracy

il. 5%

*l. 5Yo *1.5%

il. 5% *1.50/o

*l. 5%

A. 5%

*1.50/o

Counter Reading

9.8500 - 10.150 kHz

14.775 - 15.225 kHz

24.922 - 25.424 kHz

31.520 - 32.480 kHz

- 49.250 50.750 kHz

78.822 - 80.413 kHz

98.500 - 101.50 kHz

147.75 - 152.25 kHz

249.22 - 254.24 kHz

315.20 - 324.80 kHz

492.50 - 507.50 kHz

788.22 - 804.13 kHz

985.00 - 1015.0 kHz

1477.5 - 1522.5 kHz

2492.2 - 2542.4 kHz

3152.0 - 3248.0 kHz

4925.0 - 5075.0 kHz

7882.2 - 8041.3 kHz

9.8500 - 10.150 MHz

5-12

10M - 32M

1.0 *2.0%

1.5 *2.0%

L *l.O%

3.2 *2.0%

9.8000 - 10.200 MHz

14.700 - 15.300 MHz

24.922 - 25.424 MHz

31.360 - 32.640 MHz

Model 4342A

Section V

Paragraphs 5-29 and S-30

lower frequency limits to 9.850kHz and lO.lSOkHz, respectively.

Para. 5-11 d.

Use Table 5-8 for op-

tion 001 instead of Table 5-3.

Para. 5-12 b, 5-13 b, and 5-15 b.

b.

Change FREQUENCY RANGE and FREQUENCY dial settings to 1OOk - 320k and 2.0, respectively.

5-29. OPTION 001 CALIBRATION AND

ADJUSTMENT PROCEDURES.

S-30.

To apply the Calibration and Adjustment Procedures in paragraphs 5-16 and those below to option 001 instruments, partially make the following changes in standard pro-

cedures:

Para. 5-19 b.

a.

Change the FREQUENCY

RANGE and FREQUENCY dial settings

to 10k - 32k and 2.0, respectively.

b. Para. S-20 b. Change the FREQUENCY

RANGE and FREQUENCY dial settings

to 10k - 32k and 1.0, respectively.

Para. S-20 e. Change frequency toler-

ance limits to lO.OOOkHz +O.lSOkHz.

Para. 5-20 f.

Change FREQUENCY dial

setting to 3.2.

Para. S-20 g. Change frequency toler-

ance limits to 32.000kHzi0.480kHz.

Para. S-20 j. Change frequency range

to 10 - 32kHz (from 22 - 70kHz).

Para. 5-20k. Use Table 5-9 instead of

Table 5-7.

Para. 5-21 b. Change FREQUENCY RANGE

C.

and FREQUENCY dial settings to 10k -

32k and 1.0,

Para. 5-23 g. Change RF Oscillator

d.

respectively.

frequency setting to 32MHz.

Table 5-9. Frequency Adjustment (Option 001).

Frequent y

Range

10k - 32k

Frequency

Dial Setting

1.0

3.2

L

1OOk - 320k 3.2

1.0

L

1M - 3.2M 3.2

1.0

L

10M - 32M 3.2

32k - 1OOk 10

320k -

3.2M - 10M 10

1M 10

1.0 L

3.2 Ll

3.2 L

Measured

Frequency

10.000 +0.150

32.000 &O. 480

25.173 *to. 251

100.00 &l. 50 kHz

320.00 i4.80 kHz

251. ‘73 i2.51 kHz

1000.0 &5.0 kHz

3200.0 k48.0 kHz

2517.3 k25.1 kHz

10.000 +O. 200 MHz

32.000 iO.640 MHz

25.1’73 10.251 MHz

32.000 kO.480 kHz

100.00 *II. 50 kHz

79.618 *to. 796 kHz

3200.0 *48.0 kHz

10.000 +O. 150 MHz

7961.8 i79.6 kHz

kHz kHz

kHz

Adjustment

AlAlLl AlAlCl

NONE

AlAlL AlAlC5

NONE

AlAlL AlAlC9

NONE

AlAlL AlAlC13

NONE

AlAlL AlAlC3

NONE

AlAlL AlAlC7

NONE

AlAlL AlAlCll

NONE

1

I

5-13

Section V

Paragraphs 5-31 to 5-36

Model

4342A

5-31. DIAL RE-STRINGING INSTRUCTIONS.

5-32. This paragraph explains how to restring and set the dial drive strings which

move

FREQUENCY, L/C, and C dials which

rotate the internal variable capacitors. maintain dial scale accuracy and smooth dial operation, the dial string must be correctly wound on and attached to the drum scale pulley and dial or capacitor pulley and its

tension set properly. If a dial string is off or loose, repair the string in accord with the following instructions which outline

the procedures for correctly interlocking dial and capacitor.

5-33. For access to internal dial interlock-

ing mechanism, remove control panel, top, bottom, and side covers, and side frames as

follows:

Turn instrument off and remove power

a.

cord.

b.

Unscrew the four retaining screws and remove top cover. Remove bottom cover with like procedure.

To

5-34. FREQUENCY DIAL. The parts required for stringing frequecy

dial are:

String I:

1)

2) String II: Belt: HP Part No. 04342-1051

3)

Screws (2):

4)

f1P Part No. 04342-8541 HP Part No. 04342-8542

HP Part No. 0520-0127

Frequency dial re-stringing procedure is illustrated in Figure 5-8.

5-35.

L/C DIAL.

To re-string tuning capacitor dial, the following parts are required:

String I: HP Part No. 04342-8541

1)

2) String II: HP Part No. 04342-8544

3) Belt: HP Part No. 04342-1052

Screws (2): f1P Part No. 0520-0127

4)

L/C dial re-stringing procedure is illustratd

in Figure 5-9.

C.

Remove the four retaining screws lo-

cated at the left and right (top and

bottom) sides of the control panel.

d.

Lift control panel front edge up and

remove the panel.

e.

Remove both side panels by removing

the four screws on each side.

Remove both side-casting-frames by

f.

removing the eight screws on each side.

5-36. AC DIAL. To re-string AC dial, the following parts are

required:

String I: HP Part No. 04342-8541

1) String II: flP Part No. 04342-8543

21

Belt:

3)

4)

Screws (2): HP Part No. 0520-0127

HP Part No. 04342-1053

AC dial re-stringing procedure is illustrated

in Figure S-10.

5-14

Model 4342A

Section V

Figure 5-8

(81 Malre one~and half loop around the Drum Scale

securing thebelt to the pu

Figure 5-8. Frequency Dial Restringing.

5-15

Section V

Figure 5-9

Model 4342A

length) to the free end oP the spring on Main Ca-

pacitor Drum Scale Pulley.

(2) Make one hp aroundttheDr”m Scale lwley, and

tring (04342-8541. 620mm

(6) Hook the smallor circle at one end 01 the string

(04342-8544, 165mm length) to the free end OC the spring on the Main Capacitor Pulley.

5-16

Figure 5-9. Main C Dial Restringing.

to the Drum Scale Pulley using anelectrical wire.

the Main Capacitor Pulley

Model 4342A

I Serure theother end ot the belt Lo theDrum Scale

Puiiey by a SCPCW which should not be tipbtened.

Section V

Figure S-10

Hook theother end of the strinxto the stud Drum SCrtlE Pulicy.

(4) Secure abelt (04342-1053, 142mm length) and C

pulley by a YCWW.

Figure S-10.

AC Dial Restringing.

5-17

Section V Paragraphs 5-37 to 5-44

Model 4342A

5-37.

5-38.

TROUBLESHOOTING GUIDES.

This paragraph and those below provide information helpful to isolating a faulty circuit in a defective unit and the appro-

priate remedy for the trouble. Component

level troubleshooting procedures are provided in Figures 5-13 and 5-14 in the form of flow

diagrams [however, for simple circuits composed of only a few (active) components,

these figures treat the breakdown only to circuit block level and component level

troubleshooting procedure is omitted]. Before

proceeding with troubleshooting, verify

whether any external factor relating to the

instrument operating environment is contri-

buting to the trouble symptoms.

The following paragraphs outline some considerations for such external troubles:

5-39. High Frequency Line Noise.

High frequency noise superposed on the AC

power line may possibily cause an abnormal

deflection of the Q meter regardless of the sample measured. If meter pointer shows al-

most the sane deflection on any FREQUENCY and

Q RANGE setting, check quality of operating power line. To isolate trouble, proceed as follows:

1) Operate the instrument from another ac power line and attempt measurement.

deflection caused by such external electromagnetic field is irrespective of the Q range. One solution to this trouble is to enclose

the instrument in a grounded wire net shield.

Securely ground the instrument.

5-41. Operation in High Humidity

Environment.

The Q factor of a high Q inductor is generally sensitive to atmospheric humidity. Usually, ordinary high Q inductors tend to show a pronounced decrease in Q factor when they are

located in a high humidity environment (more than 80%). If Q meter indicates a lower Q value (different from a nominal value of the sample), compare instrument reading by using a Q reference coil or a stable inductor (hermetically sealed).

5-42. ELEMENTARY TROUBLESHOOTING GUIDE. 5-43. Meter Zeroing Troubles.

If Q meter does not indicate zero after the instrument is turned on and if meter zero adjustment (Figure 3-6) is not successful, A6 DC Amplifier Assembly is probably faulty. Check differential meter amplifier (A6Q2, 43, 44 and QS) and dc power supply voltages on the circuit board.

5-44.

Incorrect Q Meter Indication.

2) Securely ground the instrument chassis to earth.

If the symnton disappears or is different, use the sane procedures on actual neasurements or use a line filter in the power line.

5-40. Operating in a Strong Electromagnetic

Field.

When the instrument is operated in a strong

RF electromagnetic field, two (or more) re-

sonant frequency points are sometimes ob-

served on the Q meter indication. This

symptom arises from the fact that the Qmeasuring circuit resonates with the oscil-

lator signal injected into the circuit and additionally with the RF signal induced by the electromagnetic field as well. tice,

this trouble sometimes occurs when the

In prac-

instrument is located near a high power transmitting station (such as a broadcasting station).

The meter "true" tuning deflection can be easily distinguished from the "false" behavior because the amplitude of any meter

If indicated Q values of Q measurements are incorrect (compared with a known sample), the trouble is probably located in either the oscillator section or the Q voltmeter section. (If no deflection at all can be obtained, first check power supply voltages). To isolate the trouble, proceed as follows:

Connect a RF Voltmeter to 4342A LO

a.

and GND terminals.

b. Set 4342A Q RANGE to 30.

C.

Rotate FREQUENCY dial from lowest to

highest frequency on each FREQUENCY

RANGE setting and check RF voltmeter reading.

RF Voltmeter reading should be within

d.

30nV *O.SmVrns at any frequency setting. If this check fails, troubleshoot oscillator section and follow Figure 5-12 Troubleshooting Tree. If OK, troubleshoot voltmeter section and follow Figure 5-13 Troubleshooting

Tree.

5-18

Model 4342A

Section V

Paragraphs 5-45 and 5-46

5-45. Low Q indication in high frequency

measurements.

If the Q meter shows lower Q indication at higher frequencies (above approx. lOMltz), it is conceivable that the symptom is being caused by a drop in Q of the tuning capacitor. The tuning capacitor has a spring contact brush for grounding the capacitor rotor plates with minimal residual impedance to maintain the inherent loss of the capacitor at minimum in the high frequency region.

A

contact brush in service for a long period may possibly cause an increase in contact resistance and resultant increase in capacitor loss. The remedy for this trouble is to clean the contact brush. Clean with a cloth moistened with alcohol. To take out the contact brush, proceed as follows:

a.

Remove top cover.

b.

Remove

white plastic top plate

on

measurement terminal deck.

c. Unsolder center conductor 1 of

coaxial module connected to A4 Imped-

0

ance Converter (see Figure S-11). Remove nut

d.

retaining the coaxial

0

assembly module. Remove the six terminal deck retaining

e.

screws Lift terminal deck up and out. The

f.

0.

contact brush is located on bottom side of terminal deck.

5-46. Faulty Q Limit Operation.

If 4342A operates normally in Q measurements but Q OVER LIMIT indication malfunctions, A7 Q Limit Selector assembly is probably faulty.

If OVER LIMIT lamp does not light, first

check lamp AlODSS.

A2 TUNING CAPACITOR ASS?

Figure S-11. Tuning Capacitor Disassembly (top view).

5-19

Model 4342A

I

c

YES

Set FRI and FR Monitor T adapt within

Is there no output or is

there erratic output at

LO and GND terminals on all FREQUENCY ranges and Q Ranges?

NO

Is thert

output nals on RANGE

Section V Model 4342A

5-22

&lENCY RANGE to 220k-770k

WENCY dial AI output (AIJ3) using BNC

- and VTVM. Is reading 628 rms ilO%?

to

5.0.

ES

-,Monitor A4 input (A4J6)

-

L

NO

Set Q RANGE to 30.

using VTVM. Is reading within 1.62V rms +lO%?

Connect A8 PIN 15 to ground. Monitor Al output using

oscilloscope. Is display as shown in Figure A?

-

I

ES

YES

110 output or does erratic :ist at LO and GND termi-

ne or certain FREQUENCY

1) and on all Q RANGES?

-I

YES

NO

Is there no output or does erratic output exist at LO

and GND terminals for all

FREQUENCY dial settings ?

No output or erratic output at

LO and GND terminals on one or some Q RANGE(S) and on all FREQUENCY RANGE(S).

iI

NO

r

*

SEE INSIDE

Table 5-12.

TROUBLESHOOTtNB, OSCILLATOR SECTION

5-21

Monitor A4 output using VTVM.

-1s reading should be within

1.6OV rms *lo%?

YES

NO

A2Tl Check:

Check; A4

-Check: A3 Q Range Attenuator.

Unsolder the wire from XA8 PIN S and connect a -23V to -24V dc

variable power supply to the wire

-(Ql Base) and GND. Observe Al output waveform with oscilloscope

After adjustment of the variable power supply, can a distortionfree sine wave be seen on the

oscilloscope ?

-Monitor DC voltage at XA8 PIN S. Is voltmeter reading -24Vdc +50/o?

Check: AlAl (Sl and, L and C)

-

Connect A8 PIN 15 to ground. Observe Al output using

-oscilloscope. Is display as shown in Figure A at any FREQUENCY dial setting ?

identified with the FREQUENCY RANGE.

‘.

-c

-r

YES

I

NO

YES

I

NO

YES

NO

Remove connection lead between XA8 PIN 15 and ground. Keep

Al output at 4Vp-p and monitor DC voltage at XA8 PIN 15. -

Is voltmeter reading within

-1. SVdc-llO%?

Check; AlAl, Ql

Monitor waveform at AlAl Q3 Gate using oscilloscope. Is display as shown in Figure B?

Check: A8 ALC Amp. (Q9 through (

Check: A3 (Cl Rl and CR1 Frequei

Response)

Monitor DC voltage at XA8 PLN S. I Is voltmeter reading -24Vdc+5%?

rrue

- Check. A3 Q Range Attenuator.

d

section v

Figure 5-12

-c

I

‘CY

YES

NO

YES

NO

YES

Check: A8 ALC Amp.

Check; A3 (54, Cl, Rl and CRl)

Monitor waveform at AlA PIN 6F using Oscilloscope. Is display as shown in Figure C?

Check: AlAl (Ql and Q2)

Check* AlAl (Ql, Q2, andR)

-

iI

YES

NO -

Check- AlA RF Power Amp.

-

Check* AlAl Impedance Converter.

NO -

Check* A8 ALC Amp.

Figure 5-12. Troubleshooting, Oscillator Section

5-21

Does Q-meter indicate full scale (*3%) over the frequency range (from

22kHZ

to 70MHz)?

YES

NO

Connect an oscillator or to HI and GROUND termi

with a 50R resistor) and

0.9V rms (monitor with Set C and AC dials to mi

____-. ----

SEE INSIDE

Table 5-13.

TROUBLESHOOTING, VOLTMETER SECTION

5-23

A6 DC Amplifier Assembly.

Does Q-meter indicate full

-scale (+3’%) at higher frequencies?

a signal generator

nals (terminated

set its output to an RF Voltmeter). nimum.

--E

YES

NO d

Observe waveform at A5Q9 emitter with oscilloscope. Is amplitude flatness within*3W?

Check* A2 Tuning Capacitor

Section V

Figure 5-13

YES

r NO

YES

c

NO h

Set oscillator frequency to 1OOkHz and observe wave-

form at A5Q9 emitter with oscilloscope. Is display a

5.7Vp-p *100/o sinewave?

Set oscillator frequency to 1OOkHz and observe wave-

form at A5Q4 emitter with

oscilloscope. Is display

a O. OSVp-p *lo% sinewave?

Check: A5 Detector

Check*

A5, RF Amplifier

--I

s

YES

NO

YES

NO

Check; A5 Detector

Check; A5 (RF Amp. Q7, 8, 9)

Check; A5 (RF Amp. Q5, 6)

Check; A5 (Impedance Converter Ql thru Q4)

Figure 5-13. Troubleshooting, Voltmeter Section

5-23

PERFORMANCE CHECK TEST CARD

Hewlett-Packard Model 4342A Test Performed by

Q Meter

Serial No. Date

DESCRIPTION

1. FREQUENCY ACCURACY: STANDARD 22 kHz

22 kHz - 70 kHz L

Range 50 kHz

70 kHz 70 kHz

70 kHz - 220 kHz

Range 150 kHz

220 kHz - 700 kHz L

Range 500 kHz

700 kHz - 2.2 MHz L

Range 1.5 MHz

2.2 MHz - 7.0 MHz L Range 5.0 MHz

L 220 kHz 220 kHz

700 kHz 700 kHz

2.2 MHz

7.0 MHz

CHECK

Counter Reading

21.6’70 kHz < < 22.330 kHz

24.922 kHz < < 25.424 kHz

49. 250 kHz < < 50.750 kHz

68.950

68. 950

78.822 kHz < < 80.413 kHz

147.75 kHz < < 152.25 kHz

216.70 kHz < < 223. 30 kHz

249. 22 kHz < < 254. 24 kHz

492.50

689.50 kHz < < 710.50 kHz

788. 22 kHz < < 804.13 kHz

1477.5 kHz < < 1522.5 kHz

2167.0 kHz < < 2233.0 kHz

2167.0

2492.2 kHz < < 2542.4 kHz

4925.0 kHz < < 5075.0 kHz

6895.0 kHz < < 7105.0 kHz

kHz < < 71.050 kHz kHz < < 71.050 kHz

kHz < < 507.50 kHz

kHz < < 2233.0 kHz

7.0 MHz

7.0 MHz - 22 MHz L Range 15 MHz

22 MHz - 70 MHz L

Range 50 MHz

1’. FREQUENCY ACCURACY: OPTION 001

10 kHz - 32 kHz 15 kHz

Range L

32 kHz - 100 kHz

Range L

100 kHz - 320 kHz 150 kHz

Range L

22 MHz 22 MHz

70 MHz

10 kHz

32 kHz

50 kHz 100 kHz 100 kHz

320 kHz

6895.0 kHz < < 7105.0 kHz

7882.2 kHz < < 8041.3 kHz

14.775

21.670

21.560 MHz < < 22.440 MHz

24.922

49.000 MHz < < 51.000 MHz

68.600 MHz < < 71.400 MHz

9.8500 kHz < < 10.150 kHz

14.775 kHz < C 15.225 kHz

24.922 kHz < < 25.424 kHz

31.520

49. 250 kHz < < 50.750 kHz

78.822 kHz < < 80.413 kHz 98,500

98.500 kHz < < 101.50 kHz

147.75

249.22 kHz < < 254.24 kHz

315. 20 kHz < < 324.80 kHz

MHz < -< 15.225 MHz MHz < < 22.330 MHz

MHz < < 25.424 MHz

Counter Reading

kHz < < 32.480 kHz kHz < < 32.480 kHz

kHz < < 101.50 kHz

kHz < < 152. 25 kHz

PERFORMANCE CHECK TEST CARD

1’. FREQUENCY ACCURACY: OPTION 001

(Cont’d)

320 kHz

320 kHz - 1.0 MHz

500 kHz

Range L

1.0 MHz

1.0 MHz - 3.2 MHz 1.5 MHz Range L

3.2 MHz

3.2

MHz -

10 MHz

Range

5.0 MHz L

10 MHz 10 MHz

10 MHz - 32 MHz 15 MHz

Range L

32 MHz

2. Q RANGE 30

Q Range

100 300

1000

Counter Reading

315.20 kHz C < 324.80 kHz

492.50 kHz < < 507.50 kHz

788.22 kHz <

985.00 kHz <

< 804.13 kHz < 1015.0 kHz

< 1015.0 kHz

1477.5 kHz C < 1522.5 kHz

2492.2 kHz < < 2542.4 kHz

3152.0 kHz < < 3248.0 kHz

4925.0 kHz <

< 5075.0 kHz

7882.2 kHz < < 8041.3 kHz

9.8500 MHz < < 10.150 MHz

9.8000 MHz <

< 10. 200 MHz

14.700 MHz < < 15. 300 MHz

24.922 MHz < < 25.424 MHz

31. 360 MHz < < 32.640 MHz

Digital Voltmeter Reading

920. 6 mV < < 977.4 mV

873.0 mV < < 927.0 mV

920.6 mV <

< 977.4 mV

873.0 mV < < 927.0 mV

3. aQ RANGE

Q Range

nQ Range

4. CAPACITANCE ACCURACY C Dial

25 pF 25 pF

25 pF

100 pF 200 pF 0

300 pF 400 pF 470 pF

470 pF 15 pF

5. Q OVER LIMIT OPERATION Q Limit Setting 60

Meter Indication 50 Meter Indication

Digital Voltmeter Reading

100

10

873.0 mV < < 927.0 mV

801.9mV < < 818.lmV

AC Dial Capacitance Bridge Reading

0

-5 pF

+5 pF

0 0

(0 Reading)* -5.lpF <

(0 Reading)* +4.9pF <

* Note: 0 Reading is the readout of the

23.9pF < < 26.lpF < (0 Reading)* -4.9pE

98.9pF < < lOl.lpF

197.9pF < < 202.lpF

296.9pF <

395.9pF <

465.2pF <

Capacitance Bridge when C Dial

< (0 Reading)* +5.lpE

< 303.lpF < 404.lpF < 474.8pF < (0 Reading)* +5.lpF

is set

to 0.

Over Limit Lamp

On I Off 0

2 60

On 0

Model 4342A

Paragraphs 6-l to 6-8

Section VI

SECTION VI

REPLACEABLE PARTS

6-l. INTRODUCTION 6-2. This section contains information for ordering

replacement parts. Table 6-2 lists parts in alphanumerical order of their reference designators - and indicates the description (see Table 6-l for abbreviations used) and HP part number of each part, together with any applicable notes.

6-3. Miscellaneous parts associated with each assembly are listed at the end of each assemblylisting. Others are listed at the end of Table 6-2.

6-4. Exploded views of major parts of the instrument are given in Figure 6-l through 6-8 to aid in identify-

ing mechanical parts.

The parts in these figures are keyed to the mechanical parts index which are also included in each figure.

Table 6-l. List of Reference Designators and Abbreviations

REFERENCE DESIGNATORS

= assembly

A

= motor

B BT = battery C = capacitor CP = coupler CR = diode

= delay line

DL

= device signaling (lamp)

DS

A = amperes A. F.C. = automatic frequency control AMPL = amplifier

8. F. 0. = beat frequency oscillator BE CU = beryllium copper BH = binder head BP = bandpass BRS = brass

= backward wave oscillator

BWO

= counter-clockwise

ccw

= ceramic

CER CM0 = cabinet mount only COEF = coefficient COM = common COMP = composition COMPL = complete CONN = c0”“ect0r

CP = cadmium plate

CRT = cathode-ray tube cw = clockwise

DEPC = deposited carbon DR

= drive

ELECT = electrolytic ENCAP = encapsulated EXT = external

F = farads FH

= flat head

FIL tl = fillister head

FXD = fixed

= germanium = glass

= grou”d(ed)

E = mist electronic part F = fuse FL = filter R J = jack RT K = relay S L = inductor T M = meter TB MP = mechanical part TP

ABBREVIATIONS

H HEX HG HR

IF IMPG INCD INCL INS INT

K LH

LIN LK WASH LOG LPF

M MEG = “leg = 106 MET FLM = metal film MET OX = metallic MFR = manufacturer MINAT = miniature MOM = momentary MTG = mounting MY

N = “a”0 (10-9) N/C

NE NI PL N/O NPO

= henries = hexagonal = mercury = hour(s)

= intermediate freq = impregnated = incandescent = include(s) = insulation(ed) = internal

= kilo = 1000 = left hand

= linear taper = lock washer = logarithmic taper = low pass filter

=

milli = 10-S

oxide

= “mylar”

= normally closed = neon = nickel plate RECT = normally open RF = negative positive zero RR

(zero temperature

coefficient) RMO

6-5. Replaceable Part Lists for Option001 are given in Appendix. Changes were made in Assembly AlAl and Assembly A5 only.

6-6. ORDERING INFORMATION 6-7. To obtain replacement parts, address order or

inquiry to your local Hewlett-Packard Field Office (see lists at rear of this manual for addresses).

Identify parts by their Hewlett-Packardpart numbers.

6-8. To obtain a part that is not listed, include:

a. Instrument model number. b. Instrument serial number c. Description of the part.

d. Function and location of the part.

:

NPN NRFR

NSR

OBD OH ox

P PC PF

PH BRZ

PHL PIV

PNP p/o

POLY PORC POS POT PP PT PWV

= plug

= transistor = resistor = thermistor

= switch = transformer = terminal board = test point

= neeative-oositive-

“e&ive

= not recommended for

field replacement

= not separately

replaceable

= order by description = oval head = oxide

= peak = printed circuit = picofarads = 10

farads = phosphor bronze = Phillips = peak inverse voltage

= positive-negative-

positive

= part of = Po1ystYrene = porcelain = position(s) = pote”ttmneter = peak-to-peak = point = peak working voltage

= rectifier = radio frequency = round head or

right hand

=

rack

mount only

V VR

W X Y

RMS RWV

S-B

SCR

SE SECT SEMICON SI SIL SL SPG SPL SST SR STL

TA TD TGL THD = thread TI = titanium TOL = tolerance TRIM = trimmer TWT = traveling wave tube

u VAR

VDCW W/

W WN

= YOCUU~I, tube, “eu”

bulb, photocell, etc. = voltage regulator = cable = socket = crystal

= root-mea” square = reverse working

voltage

= slow-blow = screw = selenium = section(s) = semiconductor = silicon = silver = slide = spring = spedal = stainless steel = split ring = steel

= tantalum = time delay = toggle

= micro = 10-S = variable

= dc working volts

= with = watts = working inverse

voltage = wirewound = without

6-l

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index

Reference

Designation

Al

A

1Al

AlAlCl 0121-0236 AlAlC2” AlAlC3 0121-0236 AlAlC4* AlAlC5 0121-0236

AlAlCG* AlAlC7 Al AlC8* 0160-2247 AlAlC9 0121-0236 AlAlClO* 0160-2253

AlAlCll

AlAlC12*

AlAlC13 AlAlC14* AlAlC15

Part No.

04342-7020 OSCILLATOR ASS’Y

04342-7751 OSCILLATOR BOARD ASS’Y

04342-8751 BOARD:BLANK PC

0160-2248

0150-2243

0160-2240 0121-0236

0121-0236 0160-2256 0121-0236 0160-2241

Description

C:VAR CER CYLINDER 0.8 - 8.5pF C:FXD CER 4. 3pF i0. 25pF 500VDCW C:VAR CER CYLINDER 0.8 - 8.5pF

C:FXD CER 2.7pF k0. 25pF 500VDCW

C:VAR CER CYLINDER 0.8 - 8.5pF

C:FXD CER 2. OpF i0. 25pF 500VDCW

C :VAR CER CYLINDER 0.8 - 8.5pF

C:FXD CER 3.9pF k0. 25pF 500VDCW

C:VAR CER CYLINDER 0.8 - 8.5pF

C:FXD CER 6.8pF +O. 25pF 500VDCW

C :VAR CER CYLINDER 0.8 - 8.5pF

C :FXD CER 9.lpF 10. 25pF 500VDCW

C:VAR CER CYLINDER 0.8 - 8.5pF

C:FXD CER 2.2pF i0. 25pF SOOVDCW

NOT ASSIGNED

AlAlC16 AlAlC17 AlAlC18 AlAlC19 AlAlC20

AlAlC21 AlAlC22 AlAlC23* AlAlC24

AlAlC25

AlAlC26 0180-0291 AlAlC27 0180-0116 AlAlC28

AlAlC29 0160-2266

AlAlC30 0180-0116 AlAlC33

AlAlLl 04342-8603 COIL:VAR 39 - 58mH AlAlL AlAlL 04342-8605 COIL:VAR 1 - 1.6mH AlAlL 04342-8606 COIL:VAR 102 - 150/~H

AlAlL 04342-8607

0180-1743 C:FXD TA 0. 1nF 10% 35VDCW 0160-2264 C:FXD CER 20pF 5% 500VDCW 0160-0417 C:FXD CER 150pF 10% 500VDCW 0121-0232 C:VAR AIR 12 - 460pF

0160-2238 0180-0291 0160-2251 0180-0116

0160-2266

0150-0093

04342-8604

NOT ASSIGNED

C:FXD CER 1.5pF 500VDCW C:FXD TA OFF 10% 35VDCW C:FXD CER 5. 6pF 500VDCW C:FXD TA 6.8nF 10% 35VDCW NOT ASSIGNED

C:FXD TA 1nF 10% 35VDCW C:FXD TA 6.8pF 10% 35VDCW C:FXD CER 24pF 5% 500VDCW C:FXD CER 24pF 5% 500VDCW C:FXD TA 6.8pF 10% 35VDCW

C:FXD CER 0. OlclF -20% +80% 1OOVDCW

COIL:VAR 9 - 14mH

COIL:VAR 11 - 15nI.I

See list of abbreviations in introduction to this section

6-3

Section VI

Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

AlAlL 04342-8608 AlAlL 04342-8609 AlAlL AlAlL AlAlLlO

Al AlQl 1854-0071 AlAlQ2 AlAlQ3 1855-0022 AlAlQ4 1853-0034 AlAlQ5 1854-0019

Al AlQ6 1854-0019

AlAlRl* 0757-1094 AlAlR2* 0757-0417 AlAlR3* Al AlR4* 0698-3488 Al AlR5* 0698-3446

Al AlRG* AlAlRr 0698-3243 AlAlR8

AlAlR9 0698-3359 AlAlRlO 0757-0279

Part No. Description

9170-0029

1854-0092

0757-0411

0698-6324

0698-0085

Jote

COIL:VAR 1 - 1.3@ COIL:VAR 0. 09 - O.lpH MAGNETIC CORE:BEAD FERRITE MAGNETIC CORE :BE AD FERRITE MAGNETIC CORE:BEAD FERRITE

TRANSISTOR:NPN SILICON TRANSISTOR:NPN SILICON TRANSISTOR:FIELD EFFECT N-CHANNEL TRANSISTOR:PNP SILICON

TRANSISTOR:NPN SILICON

R:FXD MET FLM 1.47kS2 1% 1/8W R:FXD MET FLM 56252 1% 1/8W R:FXD MET FLM 3320 1% 1/8W R:FXD MET FLM 44252 1% 1/8W R:FXD MET FLM 38352 1% 1/8W

R:FXD MET FLM 187a 1% 1/8W R:FXD MET FLM 178kS2 1% 1/8W R:FXD MET FLM 2.61kiZ 1% 1/8W

R:FXD MET FLM 12. 7k0 1% 1/8W R:FXD MET FLM 3.16kS1 1% 1/8W

AlAlRll AlAlRl2 0683-2265 AlAlRl3 0757-0123

AlAlR14 0757-0442 AlAlR15 0698-3156

AlAlR16 0698-3153 AlAlRlP 0698-3151 AlAlRl8 AlAlR19 0698-4125 Al AlR20* 0757-0401

AlAlR21 AlAlR22 0757-0346

AlAlR23

AlAlSl

Al AlXAlA

0698-3156

0698-4453

0757-0821

0757-0453

3101-0260

1251-0478

04342-1026 04342-3022

R:FXD MET FLM 14.7kfi 1% 1/8W

R:FXD COMP 22MS2 5% 1/4W R:FXD MET FLM 34.8k52 1% 1/8W R:FXD MET FLM 10kS-J 1% 1/8W R:FXD MET FLM 14.7kS1 1% 1/8W

R:FXD MET FLM 3.83k0 1% 1/8W R:FXD MET FLM 2.87kS2 1% 1/8W R:FXD MET FLM 4020 1% 1/8W R:FXD MET FLM 95351 1% 1/8W R:FXD MET FLM 10052 1% 1/8W

R:FXD MET FLM 1.21kR 1% 1/2W R:FXD MET FLM 1On 1% 1/8W.

R:FXD MET FLM 3O.lk51 1% 1/8W

SWITCH :PUSH BUTTON ‘I-RANGE

CONNECTOR:PRINTED CIRCUIT 12-CONTACT

MISCELLANEOUS PLATE:ANGLE NUT:HEX FOR FERRITE CORE 7 REQ’D

6-4

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

AlA

AlA2Cl 0180-0116

AlA2C2 0180-0376

AlA2C3 0180-0116 AlA2C4 0180-0197 AlA2C5 0180-0116

AlA2C6 0160-2203 AlA2C7 0180-0116

AlA2Jl

AlA2Ll AlA2L2 9140-0098 COIL:FXD RF 2. 21J.H 10% AlA2L3 9170-0029 MAGNETIC CORE :BEAD FERRITE AlA2L4 9170-0029 MAGNETIC CORE :BEAD FERRITE

Part No.

04342-7702 RF POWER AMPLIFIER ASS’Y 04342-8702 BOARD:BLANK PC

C:FXD TA 6.81~.F 10% 35VDCW C:FXD TA 0.47pF 10% 35VDCW C:FXD TA 6.8pF 10% 35VDCW C:FXD TA 2.2wF 10% 20VDCW C:FXD TA 6.81~.F 10% 35VDCW

C:FXD MICA 91pF 5% SOOVDCW C:FXD TA 6.8uF 10% 35VDCW

1250-0257

9140-0158 COIL:FXD RF l@ 10%

CONNECTOR:RF FEMALE

Description Note

AlA2Ql 1854-0091 TRANSISTOR:NPN SILICON AlA2Q2 AlA2Q3 1854-0091 TRANSISTOR:NPN SILICON AlA2Q4

AlABRl 0757-0395 R:FXD MET FLM 56.251 1% 1/8W AlA2R2 0698-0085 R:FXD MET FLM 2.61ka 1% 1/8W AlA2R3 0698 -4422 R:FXD MET FLM 1.27ka 1% 1/8W AlA2R4 AlA2R5 0757-0394 R:FXD MET FLM 51.151 1% 1/8W

AlA2R6 0698-4418 AlA2R7 0757-0294 AlA2R8 AlA2R9 0698-3439 AlABRlO 0698-3438

AlA2Rll 0698-3430 AlA2R12 0757-0159 AlA2R13 0698-3628

1854-0091 TRANSISTOR :NPN SILICON 1854-0332 TRANSISTOR :NPN SILICON

0757-0424 R:FXD MET FLM 1. lkS1 1% 1/8W

R:FXD MET FLM 20552 1% 1/8W

0757-0294

1205-0007 1205-0008

R:FXD MET FLM 17.8R 1% 1/8W R:FXD MET FLM 17.852 1% 1/8W R:FXD MET FLM 17852 1% 1/8W R:FXD MET FLM 14752 1% 1/8W

R:FXD MET FLM 21.5S2 1% 1/8W R:FXD MET FLM 1000$-Z 1% l/‘ZW R:FXD MET OX 2200 5% 2W

MISCELLANEOUS

HEAT DISSIPATOR NUT

HEAT DISSIPATOR BODY

AlA

04342-8709 BOARD :WIRING

See list of abbreviations in introduction to this section

6-5

Section VI Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

AlCl AlC2 AlC3

AlJl

AlJ2

AlJ3

Al Pl

AlWl

Part No.

0160-235’7 C:FXD CER 1OOOpF -20% +800/o 0160-2357 C:FXD CER 1OOOpF -20% +80% 0160-2357

1250-0083 CONNECTOR:BNC FEMALE 1250-0252 CONNECTOR:BNC FEMALE PART OF AlWl 1250-0050 NUT:RF CONNECTOR PART OF AlJ3 1250-0051

1250-0872 CONNECTOR:RF MALE PART OF AlWl

04342-7601 CABLE ASS’Y:INTER CONNECTING INCLUDING AlJ3 AND

C:FXD CER 1OOOpF -20% +80%

NOT ASSIGNED

CONTACT:RF CONNECTOR PART OF AlJ3

MISCELLANEOUS

See Figure 6-1.

Description

A

Note

lP3

6-6

See list of abbreviations in introduction to this section

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Section VI

Table 6-2

Reference

Designation

A2

A2Cl A2C2 A2C3

A2C4

A2Jl A2J2 A2J2

A2J3 A2J4 A2J5

Part No. Description

04342-7201

04342-7205 0140-0074

04342-3259 04342-3259

04342-3239 04342-3232

04342-3259

TUNING CAPACITOR ASS’Y* (See Note below).

C:VAR AIR MAIN 25 - 475pF NOT SEPARATELY REPLACEABLE PART OF A2 C:VAR AIR VERNIER -5 - +5pF

NOTSEPARATELYREPLACEABLE PARTOFA2

C:FXD AIR 2pF INCLUDING C4 C:FKD MICA 56pF 10% 500VDCW NOT SEPARATELY REPLACEABLE PART OF C3

NOT SEPARATELY REPLACEABLE

CAP:BINDING POST

NOT SEPARATELY REPLACEABLE CAP:BINDING POST CONNECTOR:HEXAGONALGROUNDLUG BODY:GROUND LUG

NOT SEPARATELY REPLACEABLE

C AP:BINDING POST

NOT SEPARATELY REPLACEABLE

CAP :BINDING POST

Note

A2J6

A2Rl

A2Tl

04342-3239 04342-3232

0757-0398

04342-8601 04342-00602

04342-00601

CONNECTOR:HEXAGONALGROUNDLUG BODY:GROUND LUG

R:FXD MET FLM 750 1% l/SW

TRANSFORMER:INJECTION

SCALE AC SCALE C

MISCELLANEOUS

See Figure 6-2.

Note

Tuning Capacitor Ass’y Service Kit is available with Part No. 04342-65001. This kit includes:

P/N 04342-7201: TUNING CAPACITOR ASS’Y P/N 04342-00602: SCALE AC P/N 04342-00601: SCALE C

P/N 04342-3267 : HEXAGONAL GND LUG

Pf N 04342-3259 : P/N 04342-3256 : TERMINAL TEFLON

BINDING POST

See list of abbreviations in introduction to this section

6-7

Section VI Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A3

A3Cl

A3CRl

A3Jl

A3J2 A3J3 A3J4

A3J5

A3Rl

A3R2

A3R3

A3R4

Part No. Description

04342-7703 Q RANGE ATTENUATOR ASS’Y 04342-8703 BOARD:BLANK PC

0160-2145 C:FXD CER 0.005yF -20% +80%

1901-0347

1250-0257 1250-0257

0757-0482 0698-2041 0698-2040 0698-2041

SEMICON DEVICE:DIODE HOT CARRIER

NOT ASSIGNED NOT ASSIGNED NOT ASSIGNED CONNECTOR:RF FEMALE CONNECTOR:RF FEMALE

R:FXD MET FLM 511kS2 1% 1/8W R:FXD MET FLM 10.4dB *O. 1dB R:FXD MET FLM 9.6dB i-0. 1dB R:FXD MET FLM 10.4dB &O. 1dB

Note

A3Sl

A3S2

3101-0262 3101-0261

04342-1047 04342-i055

SWITCH:PUSH BUTTON 4-RANGE SWITCH:PUSH BUTTON l-RANGE

MISCELLANEOUS

PLATE:SHIELD MOUNTED ON PC BOARD BRACKET:SHIELD MOUNTED ON PC BOARD See Figure 6-3.

6-8

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A4

A4Cl A4C2 A4C3

A4Jl A4J2

A4J3 A4J4 A4J5

A4J6

A4Ll

A4L2

A4Ql A4Q2

Part No.

04342-7704 04342-8704

0180-0291 0150-0121

0180-0228

1250-025’7

9170-0029

9140-0098

1854-0091 1854-0332

Description Note

IMPEDANCE CONVERTER ASS’Y BOARD:BLANK PC

C:FXD TA 1pF +lO% 35VDCW C:FXD CER 0. 1pF -20% +80% 50VDCW C:FXD TA 221~.F 10% 15VDCW

NOT ASSIGNED NOT ASSIGNED NOT ASSIGNED NOT ASSIGNED

NOT ASSIGNED CONNECTOR:RF FEMALE

MAGNETIC CORE:BEAD FERRITE COIL:FXD RF 2.2pH 10%

TRANSISTOR:NPN SILICON TRANSISTOR:NPN SILICON

A4Rl A4R2 A4R3 A4R4 A4R5

0757-0395

0757-0417 0698-4431

0757-0159

0698-3628

1205-0007 1205-0008 04342-1223

R:FXD MET FLM 56.252 1% 1/8W R:FXD MET FLM 562n 1% 1/8W

R:FXD MET FLM 2.05kS1 1% 1/8W R:FXD MET FLM lka 1% 1/8W R:FXD MET OX 220R 5% 2W

MISCELLANEOUS HEAT DISSIPATOR NUT 1 REQ’D HEAT DISSIPATOR BODY 1 REQ’D PLATE

See list of abbreviations in introduction to this section

6-9

Section VI Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A5

A5Cl 0160-2244 A5C2 A5C3 0180-0376 A5C4 0160-2259 A5C5

A5C6 0160-0128 A5C7 A5C8 A5C9 A5ClO 0180-0376

A5Cll 0160-0174 A5C12 A5C13 0140-0192 A5C14 0160-0128 A5C15

A5C16 A5C17 A5C18 0180-0376 A5C19 A5C20 0150-0121

Part No.

04342-7705 IMPEDANCE CONVERTER & RF AMPLIFIER ASS’Y 04342-8705

0180-1735

0180-1745

0160-0128 0160-0128

0160-0155

0160-0128

0160-2150 0121-0147

0160-0128

0160-0174

Description Note

BOARD :BLANK PC

C:FXD CER 3pF *O. 25pF C:FXD TA 0.221~.F 10% 35VDCW C:FXD TA 0.47pF 10% 35VDCW

C:FXD CER 12pF 5%

C:FXD TA 1.51_1F 10% 20VDCW

C:FXD CER 2.2pF 20% 25VDCW

C:FXD CER 2.21.1F 20% 25VDCw C:FXD CER 2.21~.F 20% 25VDCW C:FXD MY 0.0033~F 10% BOOVDCW C:FXD TA 0.47kF 10% 35VDCW

C:FXD CER 0.47pF -20% +80% 25VDCW C:FXD CER 2. ~/.IF 20% 25VDCW C:FXD MICA 68pF 5% 300VDCW C:FXD CER 2.21~.F 20% 25VDCW

C:FXD MICA 33pF 5% SOOVDCW

C:VAR AIR 2.0 - 19. 3pF

C:FXD CER 2.2pF 20% 25VDCW C:FXD TA 0.47pF 10% 35VDCW C:FXD CER 0.47pF -20% +80% 25VDCW C:FXD CER 0. 1pF -20% +80% 50VDCW

A5C21 0180-0376 A5C22 A5C23 0180-0291

A5CRl A5CR2 1910-0016 SEMICON DEVICE:DIODE GERMANIUM A5CR3 A5CR4 A5CR5 1910-0016 SEMICON DEVICE :DIODE GERMANIUM A5CR6 1910-0016 SEMICON DEVICE :DIODE GERMANIUM

A5Ll A5L2 9140-0179

A5Ql A5Q2 A5Q3 A5Q4 A5Q5

A5Q6 A5Q7 A5Q8 A5Q9

0180-0376

1901-0025 SEMICON DEVICE :DIODE SILICON 1910-0016 SEMICON DEVICE :DIODE GERMANIUM

1910-0016 SEMICON DEVICE :DIODE GERMANIUM

1855-0022 TRANSISTOR:FIELD EFFECT N-CHANNEL 1853-0015 TRANSISTOR:PNP SILICON 2N3640 1854-0023 TRANSISTOR :NPN SILICON 1854-0092 TRANSISTOR:NPN SILICON 2N3563 1854-0296 TRANSISTOR:NPN SILICON MPS6543

1854-0092 TRANSISTOR :NPN SILICON 2N3563 1853-0015 TRANSISTOR:PNP SILICON 2N3640 1854-0233 TRANSISTOR:NPN SILICON 2N3866 1854-0091 TRANSISTOR :NPN SILICON

C:FXD TA 0.47pF 10% 35VDCW

C:FXD TA 0.47j~F 10% 35VDCW C:FXD TA ~/JF 10% 35VDCW

NOT ASSIGNED COIL:FXD RF 22w 10%

6-10

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

Part No.

Description

A5Rl 0757-0346 R:FXD MET FLM 1051 1% 1/8W A5R2

0698-3151

R:FXD MET FLM 2.87kS2 1% 1/8W A5R3 0757-0465 R:FXD MET FLM lOOka 1% l/GW A5R4 0757-0465

A5R5

0698-2335

R:FXD MET FLM lOOkG! 1% 1,‘8W

R:FXD C FLM 28.lMs2 0.5% 1W A5R6 0698 -0085 R:FXD MET FLM 2.61kS2 1% l/GW

A5R7 0698-3155 R:FXD MET FLM 4.64kSI 1% l/GW

A5R8 0757-0401 R:FXD MET FLM 10052 1% 1/8W A5R9 A5RlO

0757-0441 0698-3150

R:FXD MET FLM 8.25ka 1% 1/8W R:FXD MET FLM 2.37k9 1% 1/8W

A5Rll 0698-3439 R:FXD MET FLM 178G 1% 1/8W

A5R12

0698-0089

R:FXD MET FLM 1.78kD 1% 1/2W A5R13 0698-3430 R:FXD MET FLM 21.5a 1% 1/8W A5R14

0757-0346

R:FXD MET FLM 1Oa 1% 1/8W A5R15 0698-3152 R:FXD MET FLM 3.48ka 1% 1,‘8W

A5R16 0757-0438 R:FXD MET FLM 5.llkG’ 1% 1/8W A5R17

0757-0440 R:FXD MET FLM 7.5k&-? 1% 1/8W A5R18 0757-0438 R:FXD MET FLM 5.llkS1 1% 1/8W A5R19 0757-0422 R:FXD MET FLM 90952 1% 1/8W

A5R20

0757-0398

R:FXD MET FLM 7552 1% 1/8W

Note

A5R21 0757-0294 R:FXD MET FLM 17.8G? 1% l/GW

A5R22 0698 -4422 R:FXD MET FLM 1.27kS2 1% 1/8W

A5R23

A5R24

0757-0346

0757-0405

R:FXD MET FLM 1052 1% 1,‘GW R:FXD MET FLM 162a 1% 1/8W

A5R25 0698-3409 R:FXD MET FLM 2.37kSl 1% 1/2W A5R26 0757-0439 R:FXD MET FLM 6.81kS2 1% 1/8W

A5R27 0757-0290 R:FXD MET FLM 6.19kS1 1% 1/8W A5R28

0757-0274

R:FXD MET FLM 1.21kS1 1% 1,‘GW A5R29 0698-3434 R:FXD MET FLM 34.852 1% 1/8W A5R30

0757-0419

R:FXD MET FLM 68152 1% 1/8W

A5R31 0757-0394 R:FXD MET FLM 51.10 1% 1/8W A5R32 2100-1986 R:VAR MET FLM lkS2 10% 1/2W A5R33

A5R34

A5R35 A5R36 0757-0379

0698-3430 0698-3700 0757-0814

R:FXD MET FLM 21.5a 1% 1/8W R:FXD MET FLM 715G 1% 1/8W R:FXD MET FLM 51152 1% 1/2W

R:FXD MET FLM 12.1s2 1% 1/8W A5R37 0757-1092 R:FXD MET FLM 287fi 1% 1/2W A5R38

0757-0346

R:FXD MET FLM 10R 1% 1/8W A5R39 0757-0159 R:FXD MET FLM lkfi 1% 1/2W A5R40 0698-3152 R:FXD MET FLM 3.48k52 1% l/GW

A5R4 1 A5R43

A5R44

A5R45

0757-0401

2100-0558

0698-3429 0698-3429

R:FXD MET FLM lOOa 1% l/GW

R:VAR CERMET 20kR 10% 1/2W

R:FXD MET FLM 19.652 1% 1/8W R:FXD MET FLM 19.6a 1% 1/8W

0340-0008

9170-0029

See list of abbreviations in introduction to this section

INSULATOR-STAND OFF 2 REQ’D

MISCELLANEOUS

BEAD FERRITE

6-11

Section VI

Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A6

A6Cl A6C2 0180-0116 A6C3 A6C4 0180-0197 A6C5 0180-0197

A6CRl A6CR2 A6CR3

A6Ll A6L2

A6Ql 1855-0081 A6Q2 1855-0049 A6Q3 1853-0010

A6Q4 1854-0023

A6Q5 1853-0010

Part No.

04342-7706 DC AMPLIFIER ASS’Y 04342-8706 BOARD :BLANK PC

0160-0127 C:FXD CER 1pF 20% 25VDCW

0180-0116 C:FXD TA 6.8pF 10% 35VDCW

1901-0025 SEMICON DE VICE :DIODE SILICON 1902-3097 SEMICON DEVICE :DIODE BREAKDOWN 5.23V 2% 400mW 1902-3097 SEMICON DEVICE :DIODE BREAKDOWN 5.23V 2% 400mW

9140-0179 COIL:FXD RF 221~.H 10% 9140-0179 COIL:FXD RF 22/~H 10%

Description

C:FXD TA 6.8yF 10% 35VDCW

C:FXD TA 2.2vF 10% BOVDCW C:FXD TA 2.21~.F 10% BOVDCW

TRANSISTOR:FIELD EFFECT N-CHANNEL TRANSISTOR:FIELD EFFECT N-CHANNEL DUAL TRANSISTOR:PNP SILICON

TRANSISTOR:NPN SILICON

TRANSISTOR:PNP SILICON

Note

A6Rl

A6R2 A6R3

A6R4

A6R5

A6R6 2100-3352 A6R7 0698-3151

A6R8 0757-0416 A6R9 0757-0482 A6RlO

A6Rll 0757-0462 A6R12

A6R13 0757-0280

A6R14 0757-0439 A6R15 0757-0419

A6R16 0698-3136 A6R17 0757-0438 A6R18 0757-0419 A6R19 0757-0442 A6R20 0698-4037

0757-0442 2100-3356 0757-0401 2100-3351 0757-0439

0757-0401

0757-0442

R:FXD MET FLM lOkS2 1% 1/‘8W R:VAR CERMET 200kR 10% 1/2W R:FXD MET FLM 10052 1% 1/8W R:VAR CERMET 500R 10% 1/2W R:FXD MET FLM 6.81kS2 1% 1/8W

R:VAR CERMET 1kR 10% 1/2W R:FXD MET FLM 2.87ka 1% 1/8W

R:FXD MET FLM 51152 1% 1/8W R:FXD MET FLM 511kG 1% l/SW R:FXD MET FLM 1000 1% 1/8W

R:FXD MET FLM 75k9 1% 1/8W R:FXD MET FLM lOk0 1% 1,‘8W R:FXD MET FLM IkG? 1% 1/8W R:FXD MET FLM 6.81kB 1% 1/8W R:FXD MET FLM 681G 1% 1/8W

R:FXD MET FLM 17.8k0 1% 1/8W R:FXD MET FLM 5. llkfi 1% l/‘SW

R:FXD MET FLM 681W 1% 1,‘8W

R:FXD MET FLM 10kfi 1% 1/8W

R:FXD MET FLM 46.452 1% 1/8W

6-12

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2, Reference Designation Index (Cont’d)

Reference

Designation

A6R21 A6R22 A6R23 A6R24 A6R25

A6R26

A6R27 A6R28 A6R29

Part No.

2100-3349 0757-0462 0757-0401 0698 -0083 0698-0083

0698-4431 0698-0083 0698-0084

0757-0200 0757-0200 0757-0273

5040-5117

Description Note

R:VAR CERMET 1OOR 10% 1/2W R:FXD MET FLM 75kf-Z 1% 1/8W R:FXD MET FLM 1OOR 1% 1/8W R:FXD MET FLM 1.96kS2 1% 1/8W R:FXD MET FLM 1.96k0 1% 1/8W

R:FXD MET FLM 2.05kR 1% 1/8W R:FXD R:FXD R:FXD MET FLM R:FXD MET FLM 5.62kS-l 1% 1/8W R:FXD MET FLM 3.01kR 1% 1/8W

1.96kR

10% 1/8W

2.15kR 10% 1/8W

5.62kR

1% 1/8W

MISCELLANEOUS

EXTRACTOR:BLUE 2 REQ’D

See list of abbreviations in introduction to this section

6-13

Section VI Table 6-2

Model 4 342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A7

A7Cl A7C2 015020121 A7C3 A7C4 0180-0373

A7C5

A7C6 0160-0128 C:FXD CER 2.2pF 20% 25VDCW

A7C7 0160-0155 C:FXD MY 0.0033pF 10% BOOVDCW

A7C8 0180-0116 C:FXD TA 6.8yF 10% 35VDCW

A7CRl 1902-3059 A7CR2 1902-3234

A7CR3 A7CR4 1902-3149

A7CR5

A7CR6 1901-0025

Part No. Description Note

04342-7707 Q-LIMIT SELECTOR ASS’Y

04342-8707 BOARD :BLANK PC

0160-2964 C:FXD CER 0. OlpF -20% +80%

0160-0155 C:FXD MY 0.0033pF 10% 200VDCW

0180-0116 C:FXD TA 6.8pF 10% 35VDCW

1910-0016

1901-0025

C:FXD CER 0. 1pF -20% +80%

C:FXD TA 0. 68yF 10% 35VDCW

SEMICON DEVICE:DIODE BREAKDOWN 3.83V 5% 400mW SEMICON DEVICE:DIODE BREAKDOWN 19.6V 5% 400mW SEMICON DEVICE :DIODE GERMANIUM SEMICON DEVICE:DIODE BREAKDOWN 9.09V 5% 400mW SEMICON DEVICE :DIODE SILICON

SEMICON DEVICE :DIODE SILICON

A7Kl 0490-0214

A7Ll 9140-0210

A7L2 9140-0210

A7Ql 1855-0081

A7Q2

A7Q3 1854-0071

A7Q4

A7Q5 1854-0071

A7Q6 1854-0071

A7Q7 1854-0298

A7Q8 1854-0071

A7Q9 1854-0071

A7Rl

A7R2 0757-0280

A7R3 2100-3353

A7R4 0698-3157

A7R5 0757-0199

A7R6 0698-3245

A7R7 2100-3356

A7R8 A7R9 A7RlO

1855-0081

1854-0071

0757-1094

0698-3445 0698-3429

0757-0458

RELAY REED:DPST 8.7 - 22VDCW 0.5A, 15VA SRG-13A

COIL:FXD RF 1OOpH 5% COIL:FXD RF 1OOpH 5%

TRANSISTOR:FIELD EFFECT N-CHANNEL TRANSISTOR:FIELD EFFECT N-CHANNEL TRANSISTOR :NPN SILICON 2N3391

TRANSISTOH:NPN SILICON 2N3391

TRANSISTOR:NPN SILICON 2N3391

TRANSISTOR :NPN SILICON 2N3391 TRANSISTOR :NPN SILICON TRANSISTOR:NPN SILICON 2N3391 TRANSISTOR:NPN SILICON 2N3391

R:FXD MET FLM 1.47kfi 1% 1/8W R:FXD MET FLM lka 1% 1,‘8W R:VAR CERMET 20kR 10% 1/2W R:FXD MET FLM 19.6k0 1% 1/8W R:FXD MET FLM 21.5kSt 1% 1/8W

R:FXD MET FLM 20.5kS1 1% 1/8W

R:VAR CERMET 200kR 10% 1/2W

R:FXD MET FLM 34852 1% 1,‘8W

R:FXD MET FLM 19.6fi 1% li/8W R:FXD MET FLM 5l.lkR 1% 1/8W

6-14

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A7Rll A7R12 0757-0443 A7R13 0757-1094 A7R14 0757-0409

A7R15 0757-0440 A7R16

A7R17 075770433

A7R18 0757-0441

A7R19 0757-0289 A7R20

A7R21 0698-3158 A7R22 0757-0433 A7R23 0757-0279

A7R24

A7R25 0698-3158 A7R26 0698-3160

A7R27 A7R28 0698-3160 A7R29 0757-0416 A7R30

Part No.

0698-4207

0698-3136

0698-3460

0690-6811

0757-0346

0698-3136

Description

R:FXD MET FLM 44. 2kS2 1% 1/8W R:FXD MET FLM llkS2 1% 1/8W R:FXD MET FLM 1.47kS2 1% 1/8W R:FXD MET FLM 274a 1% 1/8W R:FXD MET FLM 7.5kR 1% l/‘SW

R:FXD MET FLM 17.8ka 1% 1/8W R:FXD MET FLM 5.llkS2 1% 1/8W R:FXD MET FLM 8.25k53 1% 1/8W R:FXD MET FLM 13.3k52 1% 1/8W R:FXD MET FLM 422kR 1% 1/8W

R:FXD MET FLM 23. 7ka 1% 1/8W R:FXD MET FLM 3.32kfl 1% 1/8W R:FXD MET FLM 3.16ka 1% 1/8W R:FXD COMP 6809 10% 1W R:FXD MET FLM 23.7kS1 1% 1/8W

R:FXD MET FLM 31.6kS2 1% 1/8W R:FXD MET FLM 1052 1% 1/8W R:FXD MET FLM 31.6kR 1% 1,‘8W R:FXD MET FLM 511a 1% 1/8W R:FXD MET FLM 17.8k9 1% 1/8W

Note

A7R31

0698 -3400

5040-5118

R:FXD MET OX 14752 1% li2W

MISCELLANEOUS

EXTRACTOR:VIOLET 2 REQ’D

See list of abbreviations in introduction to this section

Section VI Table 6-2

Model 4342A

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A8

A8Cl A8 c2 A8C3 A8C4 A8C5

A8C6 0180-0097 A8C7 0180-0982 A8C8 A8C9 0180-1735 A8C10

A8CRl 1901-0026 A8CR2 1901-0026 A8CR3 A8CR4 1901-0026 A8CR5

Part No.

04342-7708 POWER SUPPLY & ALC AMPLIFIER ASS’Y 04342-8708 BOARD:BLANK PC

0150-0121 C:FXD CER 0. 1nF -20% +80% 50VDCW 0180-0291 0180-0097 C:FXD TA 47/.~F 10% 35VDCW 0150-0121 0180-0291 C:FXD TA 1nF 10% 35VDCW

0180-0982

0180-1735

1901-0026 1902-0041

Description

C:FXD TA 1pF 10% 35VDCW C :FXD CER 0. 1lF -20% +80% 50VDCW

C:FXD TA 47yF 10% 35VDCW

C:FXD ELECT 1pF -10% +lOO% 250VDCW

C:FXD ELECT 1nF -10% +lOO% 250VDCW

C:FXD TA 0.22nF 10% 35VDCW

C:FXD TA 0.22pF 10% 35VDCW

SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE:DIODE BREAKDOWN 5.11V 5% 400mW

Note

A8CR6 1901-0025 A8CR7 1901-0025 A8CR8 1901-0025 A8CR9 1901-0025

A8CRlO 1901-0026

A8CRll 1901-0026

A8CR12 1901-0026

A8CR13 1901-0026

A8CR14 A8CR15

A8CR16 1901-0025 A8CR17 1910-0016 A8CR18 1902-0041 A8CR19 A8CR20 1901-0026

A8CR21 1901-0026 A8CR22 1902-3182

A8Ql A8Q2 A8Q3 A8Q4 A8Q5

1901-0025 1901-0025

1901-0025

1854-0039 TRANSISTOR:SILICON NPN 2N3053 1854-0071 TRANSISTOR:SILICON NPN 2N3391 1854-0215 TRANSISTOR :SILICON NPN 2N3904 1854-0215 TRANSISTOR:SILICON NPN 2N3904 1854-0071 TRANSISTOR:SILICON NPN 2N3391

SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE:DIODE SILICON SEMICON DEVICE :DIODE SILICON

SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON

SEMICON DEVICE:DIODE SILICON SEMICON DEVICE:DIODE GERMANIUM SEMICON DEVICE:DIODE BREAKDOWN 5.11V 5% 400mW SEMICON DEVICE :DIODE SILICON SEMICON DEVICE :DIODE SILICON

SEMICON DEVICE :DIODE SILICON SEMICON DEVICE:DIODE BREAKDOWN 12.1V 5% 400mW

6-16

See list of abbreviations in introduction to this section

Model 4342A

Section VI

Table 6-2

Table 6-2. Reference Designation Index (Cont’d)

Reference

Designation

A8Q6 1854-0039 A8Q7 1854-0071 A8Q8 1854-0071 A8Q9 1855-0049 A8QlO 1853-0036

A8Qll 1854-0071 A8Q12 1853-0036 A8Q13 1853-0036

A8Rl A8R2 0757-0288 A8 R3 0757-0346 A8 R4 0813-0029 A8R5 0698 -0084

A8R6 0757-0442 A8R7 0757-0439 A8R8 0698-4433 A8R9 A8RlO 0757-0442

Part No.

0813-0029

0757-0442

Description

TRANSISTOR:SILICON NPN 2N3053 TRANSISTOR:SILICON NPN 2N3391 TRANSISTOR:SILICON NPN 2N3391 TRANSISTOR:FIELD EFFECT N-CHANNEL DUAL TRANSISTOR:SILICON PNP 2N3906

TRANSISTOR:SILICON NPN 2N3391 TRANSISTOR :SILICON PNP 2N3906 TRANSISTOR:SILICON PNP 2N3906

R:FXD WW la 10% 3W R:FXD MET FLM 9.09kSZ 1% 1/8W R:FXD MET FLM 1Ofl 1% 1/8W R:FXD WW la 10% 3W R:FXD MET FLM 2.15k51 1% 1/8W

R:FXD MET FLM lOkS2 1% 1/8W R:FXD MET FLM 6.81kS1 1% 1/8W

R:FXD MET FLM 2.26ka 1% 1/8W R:FXD MET FLM lOk52 1% 1/8W R:FXD MET FLM lOkS2 1% 1/8W

Note

A8Rll A8Rl2 A8Rl3 A8Rl4 0813-0029 A8R15 0698-3447

A8Rl6 A8Rl7 A8R18 A8R19 0757-0442 A8R20

A8R21 2100-3352 A8R22 0698-4020 A8R23 A8R24 0698-3412

A8R25 0698-4477 A8R26 2100-3352

A8R27 0757-0401 A8R28 0683-1055

A8R29 0698-4511 A8R30 0757-0453

A8R31 A8R32 A8R33 A8R34 A8R35

0757-0441

2100-3352

0698-4431

0698-0084 0698-4020 0698-3158

0698-3156

0813-0029

0757-0470 0757-0442 0757-0280 0757-0444 0757-0442

R:FXD MET FLM 8.25ka 1% 1/8W R:VAR CERMET 1kR 10% 1/2W R:FXD MET FLM 2.05kS2 1% 1/8W R:FXD WW 152 10% 3W R:FXD MET FLM 422n 1% 1/8W

R:FXD MET FLM 2.15kQ 1% 1/8W R:FXD MET FLM 9.53kS2 1% 1/8W R:FXD MET FLM 23. 7kf-z 1% 1/8W R:FXD MET FLM lOkS2 1% 1/8W R:FXD MET FLM 14.7ka 1% 1/8W

R:VAR CERMET lkR 10% l/2W R:FXD MET FLM 9.53kfi 1% 1/8W R:FXD WW lS2 10% 3W R:FXD MET FLM 3.83kfi 1% 1/2W R:FXD MET FLM 10.5k52 1% 1/8W

R:VAR CERMET 1kR 10% 1/2W R:FXD MET FLM 1000 1% 1/8W R:FXD COMP 1Mfi 5% 1/4W R:FXD MET FLM 86.6k8 1% 1/8W R:FXD MET FLM 30.lkS1 1% 1/8W

R:FXD MET FLM 162k52 1% 1/8W R:FXD MET FLM lOkS2 1% 1/8W R:FXD MET FLM lka 1% 1/8W R:FXD MET FLM 12. lkn 1% 1/8W R:FXD MET FLM 10ka 1% 1/8W

See list of abbreviations in introduction to this section

6-17

Section VI Table 6-2

Model 4342A

Table 6-2, Reference Designation Index (Cont’d)

Reference

Designation

A8R36 A8R37 A8R38 A8R39

A8R40

A8R41 A8R42 A8R43

A9

A10

Part No. Description

0757-0280 0757-0200 0757-0453 0757-0438 0698-3157

0683-1055 0757-0482 0757-0461

5040-4592

04342-7710

04342-8710

R:FXD MET FLM lkS2 1% 1/8W R:FXD MET FLM 5.62kfl 1% 1/8W R:FXD MET FLM 30.lkS2 1% 1/8W R:FXD MET FLM 5. llkfl 1% 1/8W R:FXD MET FLM 19.6kS2 1% 1/8W

R:FXD COMP 1Ma 5% 1/4W R:FXD MET FLM 511kR 1% 1/8W R:FXD MET FLM 68. lkn 1% 1/8W

MISCELLANEOUS

EXTRACTOR:GRAY 2 REQ’D

NOT ASSIGNED

FREQUENCY MULTIPLIER AND OVER LIMIT INDICATOR ASS’Y BOARD:BLANK PC

Note

AlODSl AlODSX AlODS3 AlODS4 AlODS5

AlORl

All

Al lDS1 Al lDS2 Al lDS3 Al lDS4

2140-0037 2140-0037 2140-0037 2140-0037 2140-0037

0698-3402

04342-5022

04342-7711

04342-8711

2140-0123 2140-0123 2140-0123 2140-0123

5040-3313

LAMP:INCD 28V 0.04A LAMP:INCD 28V 0.04A LAMP:INCD 28V 0.04A LAMP:INCD 28V 0.04A LAMP:INCD 28V 0.04A

R:FXD MET FLM 3160 1% 1/2W

MISCELLANEOUS

SEPARATOR.LAMP

METER SCALE INDICATOR ASS’Y

BOARD:BLANK PC

LAMP:NEON

LAMP :NEON LAMP :NEON LAMP:NEON

MISCELLANEOUS

HOLDER:LAMP

6-18

See list of abbreviations in introduction to this section

HP 4342A Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual