HP 436a schematic

TM 11-6625-2969-14&P

TECHNICAL MANUAL

OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT

AND GENERAL SUPPORT MAINTENANCE MANUAL

(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)

POWER METER TS-3793/U

(HEWLETT-PACKARD MODEL 436A)

(NSN 6625-01-033-5050)

HEADQUARTERS, DEPARTMENT OF THE ARMY

9 MAY 80

SAFETY STEPS TO FOLLOW IF SOMEONE
IS THE VICTIM OF ELECTRICAL SHOCK

DO NOT TRY TO PULL OR GRAB THE lNDl-

VIDUAL

IF POSSIBLE, TURN OFF THE ELECTRICAL
POWER

IF YOU CANNOT TURN OFF THE ELECTRICAL
POWER, PULL, PUSH, OR LIFT THE PERSON TO
SAFETY USING A WOODEN POLE OR A ROPE
OR SOME OTHER INSULATING MATERIAL

SEND FOR HELP AS SOON AS POSSIBLE

AFTER THE INJURED PERSON IS FREE OF CON­TACT WITH THE SOURCE OF ELECTRICAL

SHOCK, MOVE THE PERSON A SHORT
DISTANCE AWAY AND IMMEDIATELY START

ARTIFICIAL RESUSCITATION

This manual includes copyright material reproduced by permission of the HEWLETT-PACKARD Company.

TM 11-6625-2969-14&P

TECHNICAL MANUAL

HEADQUARTERS

DEPARTMENT OF THE ARMY

No. 1l-6625-2969-14&P)

W

ASHINGTON

, DC,

9 May 1980

OPERATOR’S, ORGANIZATIONAL,

DIRECT SUPPORT AND GENERAL SUPPORT

MAINTENANCE MANUAL

(INCLUDING REPAIR PARTS

AND SPECIAL TOOLS LISTS)

POWER METER TS-3793/U

(HEWLETT-PACKARD MODEL 436A)

(NSN 6625-01-033-5050)

REPORTING OF ERRORS

You can improve this manual by recommending improvements using DA Form 2028-2 located in the back
of the manual. Simply tear out the self-addressed form, fill it out as shown on the sample, fold it where shown,
and drop it in the mail.

If there are no blank DA Forms 2028-2 in the back of your manual, use the standard DA Form 2028

(Recommended Changes to Publications and Blank Forms) and forward to the Commander, US Army Com-

munications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ

07703.

In either case a reply will be furnished direct to you.

SERIAL NUMBER

This manual applies directly to instruments with serial numbers prefixed 1606A,
1611A and 1629A.
With changes described in section VII, this manual also applies to instruments with
serial numbers prefixed 1447A, 1448A, 1451A, 1501A, 1503A, 1504A, 1505A,
1538, and 1550A.
For additional important information about serial numbers, see INSTRUMENTS
COVERED BY MANUAL in section I.

This manual is an authentication of the manufacturer’s commercial literature which, through usage, has been found to
cover the data required to operate and maintain this equipment. Since the manual was not prepared in accordance with
military specifications, the format has not been structured to consider levels of maintenance.

i

Model 436A

CONTENTS

Section

0

INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1

0-1

Scope

0-2

Indexes of Publications . . . . . 0-1

0-3

Forms and Records . . . . . . . . 0-1

0-4

0-5

Administrative Storage . . . . . 0-1

0-6

Destruction of Army Electronics

GENERAL INFORMATION . . . . . . . 1-1

I
1-1.

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

1-6.

Specifications . . . . . . . . . . . . 1-1

1-8.

Instruments Covered by Manual . . . . . . 1-1

1-14. Description . . . . . . . . . . . . 1-1

1-18. Options . . . . . . . . . . . . . . . . . . . . . . 1-3

1-19.
1-22.
1-24.

1-27. Accessories Supplied . . . . . . . . . 1-4

1-29. Equipment Required but not Supplied. . . . 1-4

1-31. Equipment Available . . . . . . . . . 1-4

1-34. Recommended Test Equipment . . . . . . 1-4

1-36. Safety Considerations . . . . . . . . . 1-4

II

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

2-3. Initial Inspection . . . . . . . . . . . 2-1

2-5. Preparation for Use . . . . . . . . . . 2-1

2-6. Power Requirements . . . . . . . . 2-1

2-8. Line Voltage Selection . . . . . . . . 2-1

2-10. Power Cable . . . . . . . . . . . . . . . . . 2-1

2-12.

2-14. Interconnections . . . . . . . . . . 2-2

2-18.

2-21. Operating Environment. . . . . . . . 2-2

2-23. Bench Operation . . . . . . . . . . 2-2

2-25.

2-28. Storage and Shipment . . . . . . . . . 2-3

2-29.
2-31.

III OPERATION . . . . . . . . . . . . 3-1

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

3-4. Panel Features. . . . . . . . . . . . 3-1

3-6. Operator’s Maintenance . . . . . . . . 3-1

3-8. Operator’s Checks . . . . . . . . . . 3-1

3-10. Local Operating Instructions . . . . . . . 3-1

3-12. Hewlett-Packard Interface Bus Remote

3-14.

3-18. DataMessages. . . . . . . . . . .3-20

3-21. Receiving Data Messages . . . . . . .3-20

3-32. Sending Data Messages from the Power

Input-Output Options . . . . . . . . 1-3

Cable Options. . . . . . . . . . . 1-3

Remote Control Options . . . . . . . 1-4

INSTALLATION . . . . . . . . . . . 2-1

Circuit Options . . . . . . . . . . 2-2

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

Rack Mounting . . . . . . . . . . 2-2

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

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

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

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

Meter . . . . . . . . . . . .3-24

Page

0-1

0-1

0-1

Contents

Section

3-40.
3-42.
3-44.
3-46.
3-48.

3-50.
3-52.

3-54.
3-56.
3-58.
3-60.

3-62. Remote BCD Interface Operation . . . . . 3-29

3-65.
3-67.

3-73. Power Measurement Accuracy . . . . . 3-37

3-75. Sources of Error and Measurement .

3-81.

3-86.

IV
4-1.
4-3.
4-5.
4-7.
4-10.
4-11.
4-12.
4-13.

V
5-1.
5-4.
5-10.
5-12.
5-14.
5-16.
5-17.
5-18.

5-19.
5-20.
5-21.

5-22.

VI
6-1.
6-3.
6-5.
6-7.

Receiving the Trigger Message . . .

Receiving the Clear Message . . . .

Receiving the Remote Message . . .

Receiving the Local Message . . . .

Receiving the Local Lockout and Clear

Lockout Set Local Messages . . .
Receiving the Pass Control Message .
Sending the Required Service Message .
Sending the Status Byte Message . .

Sending the Status Bit Message . . .

Receiving the Abort Message . . . .

Test of HP-IB Operation . . . . .

Output Data Format . . . . . . . . 3-36

BCD Remote Programming . . . . . . 3-36

Uncertainty . . . . . . . . . . . 3-37

Corrections for Error . . . . . . . . 3-38

Calculating Total Uncertainty . . . . . 3-38

PERFORMANCE TESTS . . . . . . . . 4-1

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

Equipment Required . . . . . . . . . 4-1

Test Record . . . . . . . . . . . .. . . . . . . . . . . . 4-1

Performance Tests . . . . . . . . . . 4-1

Zero Carryover Test . . . . . . . . . . 4-2

Instrument Accuracy Test . . . . . . . . 4-3

Calibration Factor Test . . . . . . . . 4-6

Power Reference Level Test . . . . . . . 4-7

ADJUSTMENTS . . . . . . . . . . . 5-1

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

Safety Considerations . . . . . . . . . 5-1

Equipment Required . . . . . . . . . 5-1

Factory Selected Components . . . . . . 5-1

Adjustment Locations . . . . . . . . . 5-1

DC Offset Adjustment . . . . . . . . . 5-2

Auto Zero Offset Adjustment . . . . . . 5-3

Spike Balance Adjustment . . . . . . . 5-4

Multivibrator Adjustment . . . . . . . . 5-5

A-D Converter and Linear Meter Adjustment. . 5-6
Power Reference Oscillator

Frequency Adjustment . . . . . . . . 5-8

Power Reference Oscillator Level

Adjustment . . . . . . . . . . . . . . . . . . . . . . 5-9

REPLACEABLE PARTS . . . . . . . . 6-1

Introduction . . . . . . . . . . . . 6-1

Abbreviations . . . . . . . . . . . . 6-1

Replaceable Parts List . . . . . . . . . 6-1

Ordering Information . . . . . . . . . 6-1

. . . . 3-29

. . . . 3-29

. . . . 3-29

. . . .

. . . .

. . . . 3-29

. . . 3-29

. . . . 3-29

.. . . 3-29

. . .

. . . . 3-29

iii

Page

3-29

3-29

3-29

Contents

CONTENTS (Cont’d)

Section

6-10. Parts Provisioning . . . . . . . . . . 6-1

6-12. Direct Mail Order System . . . . . . . . 6-1

6-13 Cross Reference Index . . . . . 6-21

MANUAL CHANGES . . . . . . . . . 7-1

VII
7-1.

Introduction . . . . . . . . . . . . 7-1

Manual Changes . . . . . . . . . . . 7-1

7-3.
7-6.

Manual Change Instructions . . . . . . . 7-1

VIII

SERVICE . . . . . . . . . . . . .8-1

8-1.

Introduction . . . . . . . . . . . 8-1

8-3.

Safety Considerations . . . . . . . . 8-1

8-9.

Recommended Test Equipment . . . . . 8-5

8-11.

Service Adds . . . . . . . . . . . 8-5

8-16.

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

8-17.
8-19.

Factory Selected Components . . . . 8-5

Disassembly and Reassembly Procedures . 8-5

Page

APPENDIXES

Model 436A

Section

8-24. Basic Circuit Descriptions . . . . . . . 8-7

8-25. Linear Integrated Circuits . . . . . . 8-7

8-30. Digital Integrated Circuits and Symbols . 8-7

8-55. Troubleshooting . . . . . . . . . .

8-59. Standard Instrument Checkout . . . .

8-64.
8-68.
8-70. Block Diagram Circuit Descriptions . . .
8-71.
8-75.
8-87.
8-114.
8-117.

8-130. Data Mode Operation . . . . . .

8-155. Service Sheet 5 . . . . . . . . .

HP-IB Instrument Checkout . . . . .

BCD Instrument Checkout . . . . .

Service Sheet 1 . . . . . . . . .

Service Sheet 2 . . . . . . . . .

Service Sheet 3 . . . . . . . . .

Service Sheet 4 . . . . . . . . .

Command Mode Operation . . . . .

Page

8-16
8-16
8-69
8-117
8-123
8-123

8-124
8-128
8-150
8-150
8-153
8-163

APPENDIX A.

B.

Section I.

II.

APPENDIX C.

D.

Section I.

II.

III.

IV.

APPENDIX E.

Figure

HP Model 436A Power Meter and Accessories

1-1.

Supplied . . . . . . . . . . .1-0

Line Voltage Selection . . . . . . . . 2-1

2-1.

Power Cable HP Part Numbers Versus

2-2.

Mains Plugs Available . . . . . . . 2-2

Hewlett-Packard Interface Bus Connection . 2-6

2-3.

BCD Interface Connection. . . . . . . 2-7

2-4.

Front and Rear Panel Controls, Connectors,

3-1.

and Indicators. . . . . . . . . . 3-2

Operator’s Checks . . . . . . . . . 3-6

3-2.

Operating Instructions . . . . . . . . 3-16

3-3.

Power Meter Response Curve (Settling Time for

3-4.

Analog Circuits) . . . . . . . . . 3-26

Measurement Timing Flow Chart (Settling

3-5.

Time for Digital Circuitry) . . . . . 3-27

Operating Program Simplified Flow Chart. . 3-28

3-6.

References .. .. .. .. .. .. .. .. ..

Components of End Item List

Introduction

Integral Components of End Item . . . . . . . . . . B-2

Additional Authorization List
Maintenance Allocation

Introduction

Maintenance Allocation Chart

Tools and Test Equipment Requirements .. .. .. D-5

Remarks (N/A)
Expendable Supplies and Materials List (N/A)

ILLUSTRATIONS

Page

Figure

3-7. Test of HP-IB Operation Flowchart . . . 3-30

3-8. 436A Quick Programming Guide . . . . 3-31

3-9. Calculating Measurement Uncertainties . . 3-42
3-10. The Effect of Power Sensor Mismatch

3-11. Calculating Measurement Uncertainty

4-1.
4-2.
4-3.
4-4.

5-1.
5-2.
5-3.
5-4.
5-5.

Page A-1

B-1

(N/A)

D-1
D-3

Page

on Measurement Accuracy . . . . . . 3-44

(Uncertainty in dB Known) . . . . . 3-45

Zero Carryover Test Setup. . . . . . . 4-2

Instrument Accuracy Test Setup . . . . 4-4

Calibration Factor Test Setup . . . . . 4-6

Power Reference Level Test Setup . . . . 4-8

DC Offset Adjustment Setup . . . . . . 5-2

Auto Zero Offset Adjustment Setup . . . 5-3

Spike Balance Adjustment Setup . . . . 5-4

Multivibrator Adjustment Setup . . . . . 5-5

A-D Converter and Linear Meter

Adjustment Setup . . . . . . . . 5-6

iv

Model 436A

Figure

Power Reference Oscillator Frequency

5-6.

Adjustment Setup . . . . . . .

Power Reference Oscillator Level

5-7.

Adjustment Setup . . . . . . .

Cabinet Parts . . . . . . . . . .

6-1.

Schematic Diagram Notes . . . . . .

8-1.

Front Panel Removal . . . . . . .

8-2.

Operational Amplifier Functional Circuits.

8-3.

Dual D-Type Flip-Flop . . . . . . .

8-4.

Four-Bit Bistable Latch. . . . . . .

8-5.

Dual J-K Master/Slave Flip-Flop and Gate

8-6.

Pulse Timing. . . . . . . . .

Dual J-K Edge-Triggered Flip-Flop . . .

8-7.

Programmable Counters . . . . . .

8-8.

3-Line to 8-Line Decoder . . . . . .

8-9.

8-Input Data Selector (Multiplexer) . . .

8-10.

LED Display Driver . . . . . . . .

8-11.

Numeric Display . . . . . . . . .

8-12.

MOS and TTL ROMs . . . . . . .

8-13.

Power Meter Operating Cycle . . . . .

8-14.

Operating Program Flow Chart . . . .

8-15.

HP-IB Verification Program

8-16.

(HP 9830A Calculator) . . . . . .

HP-IB Verification Program

8-17.

(HP 9820A Calculator) . . . . . .

Analog-to-Digital Converter Simplified

8-18.

Diagram and Waveforms . . . . .

HP-IB Listen Handshake Timing . . . .

8-19.

Data Valid Status Generator Timing . .

8-20.

Overall Block Diagram . . . . . . .

8-21.

AC Gain, A-D Converter and Display

8-22.

Circuits Block Diagram . . . . . .

Controller and Counters Block Diagram .

8-23.

HP-IB (Option 022) Circuit Block Diagram

8-24.

BCD Interface (Option 024) Circuit

8-25.

Block Diagram . . . . . . . .

AlAl Display Assembly Component

8-26.

Locations . . . . . . . . . . . 8-177

A1A2 Pushbutton Assembly

8-27.

Component Locations . . . . . . . 8-177

Front Panel Assembly

8-28.

Schematic Diagram . , . . . . . . 8-177

A2 AC Gain Assembly Component, Test

8-29.

Point, and Adjustment Locations . . . 8-179

ILLUSTRATIONS (Cont’d)

Page

Figure
8-30. AC Gain Assembly Schematic Diagram . .

5-8

8-31. A1A3 CAL FACTOR % Switch Assembly

Component Locations . . . . . . .

5-9

8-32. A3 A-D Converter Assembly

Components, Test Point, and

6-18

8-2
8-6
8-8
8-9
8-9

8-33. A-D Converter Assembly

8-34. A4 Counter Relative Assembly

8-35. Counter Relative Assembly

Adjustment Locations . . . . . . .

Schematic Diagram . . . . . . . .

Component and Test Point

Locations . . . . . . . . . . . . . . . . . . . . . . . . .

Schematic Diagram . . . . . . . .

8-10
8-10
8-11
8-12
8-13
8-14
8-15
8-15
8-17
8-25

8-70

8-36. A5 Controller Assembly Component

and Test Point Locations . . . . . .

8-37. Controller Assembly

Schematic Diagram . . . . . . . .

8-38. A6 HP-IB (Option 022) Control

Assembly Component and

Test Point Locations . . . . . . .

8-39. HP-IB (Option 022) Control Assembly

Schematic Diagram . . . . . . . .

8-40. A7 HP-IB (Option 022) Input/Output

Assembly Component and Test

Point Locations . . . . . . . . .

8-41. HP-IB (Option 022) Input/Output Assembly

Schematic Diagram . . . . . . . .

8-95

8-42. A6 BCD Interface Control (Option 024)

Assembly Component and

8-126
8-151
8-160
8-167

8-43. BCD Interface Control (Option 024)

8-44. A8 Power Reference Oscillator Assembly

Test Point Locations . . . . . . .

Assembly Schematic Diagram . . . .

Component, Test Point, and

8-169

8-171
8-173

8-175

8-45. Power Reference Oscillator Assembly

8-46. A9 Power Supply Rectifier and Regulator

Adjustment Locations . . . . . . .

Schematic Diagram . . . . . . . .

Assembly Component and

Test Point Locations . . . . .

8-47. Rear Panel Mounted Power Supply

Component Locations . . . . .

8-48. Power Supply Rectifier and Regulator

Assembly Schematic Diagram . .
8-49. Rear View of Front Panel (Removed) .
8-50. Top Internal View Standard Instrument
8-51. Top Internal View HP-IB or

BCD Interface . . . . . . .

-

Contents

Page

8-179

8-181

8-181

8-181

8-183

8-183

8-185

8-185

8-186

8-187

8-189

8-189

8-191

8-191

8-193

8-193

. . 8-195

. . 8-195

8-195

. .
. . 8-197

8-197

. .

. . 8-197

v

Contents

Table

1-1.
1-2.

2-1.
2-2.

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

3-4.

3-5.

3-6.

3-7.
3-8.

4-1.

4-2.

TABLES

Page

Specifications . . . . . . . . . . . . 1-2

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

Circuit Options . . . . . . . . . . . 2-4

USA Standard Code for Information

Interchange (ASCII) . . . . . . . . 2-5

Message Reference Table . . . . . . . . 3-21

Measurement Sequence . . . . . . . . 3-22

Hewlett-Packard Interface Bus

Input Program Codes . . . . . . . . 3-23

Hewlett-Packard Interface Bus

Output Data String . . . . . . . . . 3-25

Power Meter Remote Access Time to

First Output Data Character . . . . . . 3-26

Power Meter Output Data Printout for

HP 5055A Digital Recorder . . . . . . 3-36

BCD Output Data Codes . . . . . . . . 3-39

BCD Programming Commands . . . . . . 3-41

Zero Carryover Autorange Digital

Readout Results . . . . . . . . . . 4-3

Instrument Accuracy Test Results . . . . . 4-5

Model 436A

Table
4-3.

Instrument Accuracy Test Results

for dB [REF] Mode . . . . . . . . 4-5

4-4.

Calibration Factor Test Results . . . . . . 4-7

Performance Test Record . . . . . . . . 4-10

4-5.

Factory Selected Components . . . . . . 5-2

5-1.
6-1.

Reference Designators and Abbreviations . .

Replaceable Parts . . . . . . . . .

6-2.
6-3.

Code List of Manufacturers . . . . . .

Manual Changes by Serial Number . . . .

7-1.
8-1.

Logic Levels and Power Requirements . . .

8-2.

Program Mnemonic Descriptions . . . .

8-3.

Standard Instrument Checkout . . . . .

8-4.

HP-IB Circuit Troubleshooting . . . . .

8-5.

BCD Interface Option 024 Checkout . . .

8-6.

Operating Program Description . . . . .

8-7.

Up/Down Count Control Logic Steering . .

8-8.

Function Decoder Clock Selection . . . .

Programming Command Logic

8-9.

Operating Summary . . . . . . . .

Power Meter Talk HP-IB Output

8-10.

Data Format . . . . . . . . . . 8-161

Page

. ..6-2
. .6-4
. 6-19

. .7-1
. .8-9

.8-20
.8-52
.8-99
.8-117
.8-130

8-145

.8-155

8-155

SERVICE SHEETS

Service Sheet

1

Overall Block Diagram . . . . . . . . . . . . . . . . .8-166

2 AC Gain, A-D Converter, and Display Circuits

Block Diagram (A1A1, A2, A3) . . . . . . . .8-168

3 Controller and Counters Block Diagram

(A1A2, A4, A5) . . . . . . . . . . . . . . . . . . . . .8-170

4 HP-IB (Option 022) Circuit Block

Diagram (A6, A7) . . . . . . . . . . . . . . . . .8-172

5 BCD Interface (Option 024) Circuit

Block Diagram (A6, A7). . . . . . . . . . . . .8-174

Front Panel Assembly (A1A1, A1A2) . . . . . . .8-176

6

7 AC Gain Assembly (A2) . . . . . . . . . . . . . . . .8-178

Page

Service Sheet
8

A-D Converter Assembly (A1A3, A3) . . . . . . .8-180

9

Counter Relative Assembly (A4) . . . . . . . . . .8-182

10

Controller Assembly (A5). . . . . . . . . . . . . . .8-184

HP-IB (Option 022) Control Assembly (A6) . . .8-186

11

HP-IB (Option 022) Input/Output

12

Assembly (A7) . . . . . . . . . . . . . . . . . . . . . . .8-188

BCD Interface Control (Option 024)

13

Assembly (A6, A7) . . . . . . . . . . . . . . . .8-190

Power Reference Oscillator Assembly (A8). . . .8-192

14

Power Supply Rectifier and Regulator

15

Assembly (A9, A10) . . . . . . . . . . . . . . .8-194

Page

vi

Model 436A

Safety Considerations

SAFETY CONSIDERATIONS

GENERAL

This product and related documentation must be
reviewed for familiarization with safety markings
and instructions before operation. This product has
been designed and tested in accordance with inter­national standards.

SAFETY SYMBOLS

Instruction manual symbol: the

product will be marked with this
symbol when it is necessary for
the user to refer to the instruc­tion manual (refer to Section II
of this manual.

Indicates hazardous voltages.

Indicates earth (ground) terminal.

The WARNING sign denotes a
hazard. It calls attention to. a
procedure, practice, or the like,
which, if not correctly performed
or adhered to, could result in
personal injury. Do not proceed
beyond a WARNING sign until
the indicated conditions are fully
understood and met.

The CAUTION sign denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like, which, if not correctly
performed or adhered to, could
result in damage to or destruc­tion of part or all of the product.
Do not proceed beyond a CAU­TION sign until the indicated
conditions are fully understood
and met.

SAFETY EARTH GROUND

This is a Safety Class I product (provided with a
protective earthing terminal). An uninterruptible

safety earth ground must be provided from the
main power source to the product input wiring ter­minals, power cord, or supplied power cord set.
Whenever it is likely that the protection has been
impaired, the product must be made inoperative
and be secured against any unintended operation.

BEFORE APPLYING POWER

Verify that the product is configured to match the
available main power source per the input power
configuration instructions provided in this manual.

If this product is to be energized via an auto-trans-

former make sure the common terminal is con­nected to the neutral (grounded side of mains
supply).

SERVICING

Any servicing, adjustment, maintenance,

or repair of this product must be per­formed only by qualified personnel.

Adjustments described in this manual

may be performed with power supplied

to the product while protective covers
are removed. Energy available at many
points may, if contacted, result in per­sonal injury.

Capacitors inside this product may still

be charged even when disconnected from

its power source.

To avoid a fire hazard, only fuses with

the required current rating and of the
specified type (normal blow, time delay,

etc.) are to be used for replacement.

vii

SECTION 0

INSTRUCTIONS

TM ll-6625-2969-14&P

0-1.

operation and maintenance instructions.
TS-3793/U is referred to as the Hewlett-Packard Model 436A Power Meter.

0-2.

whether there are new editions, changes, or additional publications pertain-

ing to the equipment.

modification work orders (MWO’S) pertaining to the equipment.

0-3.

forms, records, and reports which are to be used by maintenance personnel
at all levels of maintenance are listed in and prescribed by TM

NAVSUPINST 4030.29/AFR 71-13/MCO P4030.29A and DSAR 4145.8.

SCOPE .

This manual describes Power Meter TS-3793/U (fig. 1-1) and provides

Throughout this manual, the

INDEXES OF PUBLICATIONS.

a.

DA Pam 310-4.

b.

DA Pam 310-7.

FORMS AND RECORDS.

a.

Reports of Maintenance and Unsatisfactory Equipment. Maintenance

Refer to the latest issue of DA Pam

Refer to DA Pam 310-7 to determine whether there are

310-4

to determine

38-750.

Report of Packaging and Handling Deficiencies. Fill out and forward

b. Report of Packaging Improvement Report) as prescribed in AR 700-58/

c. Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and

forward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in

AR 55-38/NAVSUPINST 4610.33A/AFR 75-18/MCO P4610.19B and DSAR 4500.15.

0-4.

Instructions for preparing EIR’s are provided in TM 38-750, The

Maintenance Management System. EIR’s should be mailed directly to

Commander, US Army Communications and Electronics Materiel Readiness
Command and Fort Monmouth, ATTN:

A reply will be furnished directly to you.

0-5.

shall be in accordance with TM 740-90-1.

0-6.

accordance with TM 750-244-2.

REPORTING OF EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR).

EIR’s will be prepared using DA Form 2407, Maintenance Requiest.

Army

DRSEL-ME-MQ, Fort Monmouth, NJ 07703.

ADMINISTRATIVE STORAGE.

Administrative storage of equipment issued to and used by Army

DESTRUCTION OF ARMY ELECTRONICS MATERIEL.

Destruction of Army Electronics materiel to prevent enemy use shall be in

activities

0-1

General Information

Model 436A

1-0

Figure 1-1. HP Model 436A Power Meter and Accessories Supplied

Model 436A

General Information

SECTION I

GENERAL INFORMATION

1-1. INTRODUCTION

1-2. This manual provides information pertaining
to the installation, operation, testing, adjustment
and maintenance of the HP Model 436A Power
Meter.

1-3. Figure 1-1 shows the Power Meter with
accessories supplied.

1-4. Packaged with this manual is an Operating
Information Supplement. This is simply a copy of
the first three sections of this manual. This
supplement should be kept with the instrument for
use by the operator. Additional copies of the

Operating
ordered through your nearest Hewlett-Packard
office. The part numbers are listed on the title page
of this manual.

1-5. On the title page of this manual, below the

manual part number, is a “Microfiche” part
number. This number may be used to order

4x6-inch microfilm transparencies of the manual.

The microfiche package also includes the latest
Manual Changes supplement as well as all pertinent

Service Notes.

1-6. SPECIFICATIONS

1-7. Instrument
Table 1-1. These specifications are the performance
standards or limits against which the instrument
may be tested.

1-8. INSTRUMENTS COVERED BY MANUAL

1-9. Power Meter Options 002, 003, 009, 010,
011, 012, 013, 022, and 024 are documented in
this manual. The differences are noted in the
appropriate location such as OPTIONS in Section
I, the Replaceable Parts List, and the schematic
diagrams.

Information Supplement may be

specifications

are listed in

number prefix(es) as listed under SERIAL
NUMBERS on the title page.

1-11. An instrument manufactured after the
printing of this manual may have a serial prefix
that is not listed on the title page. This unlisted
serial prefix indicates that the instrument is
different from those documented in this manual.
The manual for this instrument is supplied with a
yellow Manual Changes supplement that contains
change
differences.

1-12. In addition to change information, the
supplement may contain information for cor­recting errors in the manual. To keep this manual
as current and accurate as possible, Hewlett­Packard recommends that you periodically request
the latest Manual Changes supplement. The
supplement for this manual is keyed to the
manual’s print date and part number, both of
which appear on the title page. Complimentary
copies
Hewlett-Packard.

1-13. For information concerning a serial number
prefix not listed on the title page or in the Manual
Changes supplement, contact your nearest Hewlett­Packard office.

1-14. DESCRIPTION

1-15. The Power Meter is a precision digital­readout instrument capable of automatic and
manual measurement of RF and Microwave power
levels. It is designed for interconnection with a
compatible Power Sensor (refer to Table 1-1,

Specifications) to form a complete power measure­ment system. The frequency and power range of
the system are determined by the particular Power

Sensor selected for use. With the Power Sensors
available, the overall frequency range of the system
is 100 kHz to 18 GHz, and the overall power range

is -70 to +35 dBm.

information

of the supplement are available from

that

documents

the

1-10. This instrument has a two-part serial
number. The first four digits and the letter
comprise the , serial number prefix. The last five
digits form the sequential suffix that is unique to
each instrument. The contents of this manual
apply directly to instruments having the same serial

1-16. Significant operating features of the Power

Meter are as follows:

●

Digital Display:

seven-segment LED, plus a sign when in the

dBm or dB (REL) mode. It also has under- and

The display is a four-digit,

1-1

General Information

Model 436A

Table 1-1. Specifications

SPECIFICATIONS

Frequency Range:

100 kHz to 18 GHz (depending on power sensor used).

Power Range:

(display calibrated in watts, dBm, and dB relative to
reference power level).

With 8481A, 8482A, or 8483A sensors:

50 dB with 5
full scale ranges of –20, –10, O, 10, and 20 dBm

(l0pW

to 100 mW).

With 8481H or 8482H sensors:

45 dB with 5 full scale

ranges of 0, 10, 20, 30 and 35 dBm (1 mW to 3W).

With 8484A sensor:

50 dB with 5 full scale ranges of

-60, -50, -40, -30, and -20 dBm (1 nW to

10/Jw).

Accuracy:

Instrumentation1:

Watt mode: ±0.5%.
dBm mode: ±0.02 dB ±0.001 dB/°C.
dB [REL] mode2: ±0.02 dB ±0.001 dB/°C.

Zero:

Automatic, operated by front panel switch.

Zero set:

±0.5% of full scale on most sensitive range.

typical, ±1 count on other ranges.

Zero carry over:

±0.2% of full scale when zeroed on

the most sensitive range.

Noise

(typical, at constant temperature, peak change
over any one-minute interval): 20 pW (8484A);
40 nW (8481A, 8482A, 8483A); 4 pW (8481H,

8482H).

Drift

(1 hour, typical, at constant temperature after
24-hour warm-up); 20 pW (8484A); 10 nW (8481A,
8482A, 8483A); 1.0 0W (8481H, 8482 H).

Power Reference:

Internal 50 MHz oscillator with
Type N Female connector on front panel (or rear
panel, Option 003 only).

Power output: 1.00 mW.

Factory set to ±0.7%, traceable to the National
Bureau of Standards.
Accuracy: ±1.2% worst case (±0.9% rss) for one
year (0°C to 55°C).

Response Time:

(0 to 99% of reading, five time constants)
Range 1 (most sensitive) <10 seconds.

Range 2
Range 3-5

<1 second
<100 milliseconds.

(Typical, measured at recorder output).

Cal Factor:

16-position switch normalizes meter reading to ac­count for calibration factor or effective efficiency,
Range 85% to 100% in 1% steps.

Cal Adjustment:

Front panel adjustment provides capability to adjust
gain of meter to match power sensor in use.

Recorder Output:

Proportional to indicated power with 1 volt corre-

sponding to full scale and 0.316 volts to -5 dB;

kfl

output impedance, BNC connector.

1

RF Blanking Output:

Open collector TTL; low corresponds to blanking

when auto-zero mode is engaged.

Display:

Digital display with four digits, 20% over-range capa-

bility on all ranges. Also, uncalibrated analog peak-

ing meter to see fast changes.

Power Consumption:

100, 120, 220, or 240 V + 5%, -10%, 48 to 440 Hz,

less than 20 watts (<23 watts with Option 022, or

024).

Dimensions:

134 mm High (5-1/4 inches).
213 mm Wide (8-3/8 inches).
279 mm Deep (11 inches).

Net Weight:

4.5 kg (10 lbs).

1-2

1

Includes sensor non-linearity. Add +1.5 -1.0% on top range when using the 8481A, 8482A, or 8483A power sensors.

2

Specifications are for within range measurements. For range-to-range accuracy add the range uncertainties.

Model 436A

General Information

DESCRIPTION (cont’d).

overrange indicators.
overrange capability

There is a 20 percent
in all ranges.

Large
10 mm (0.375 inch) digits are easy to see even
in a high glare environment.

● Auxiliary Meter:

Complements the digital
display by showing fast changes in power level.
Ideal for

“peaking”

transmitter output or

other variable power devices.

● Choice of Display in Watts, dBm or dB:

Absolute power can be read out in watts or
dBm. Relative power measurements are made
possibile with the dB [REF] switch. Pressing
this switch zeros the display for any applied
input power and any deviation from this
reference is shown in dB with a resolution of
±0.01 dB. This capability is particularly useful
in frequency response testing.

●

Power Units and Mode Annunciator:

annunciator

provides

error-free

The units

display
interpretation by indicating appropriate power
units in the watt mode. The mode annunciator
indicates the mode of operation: dBm, dB
(REL), ZERO or REMOTE.

● Completely Autoranging: The Power Meter

automatically switches through its 5 ranges to
provide completely

“hands off” operation.
The RANGE HOLD switch locks the Power
Meter in one of its ranges when autoranging is

not desired.

● Automatic Sensor Recognition: The Power

Meter continually decodes the sensitivity of
the Power Sensor to which it is connected.
This information is then used to automatically
control the digital display decimal point
location and, when WATT MODE operation is
selected, to light the appropriate power units
annunciator.

●

Auto Zero:

Zeroing the meter is accomplished
by merely depressing the SENSOR ZERO
switch and waiting until the display shows all
zeros before releasing it. The meter is ready to
make measurements as soon as the zero light
in the mode annunciator goes off.

●

RF Blanking Output:

Open collector TTL; low
corresponds to blanking when the sensor zero
is engaged, ” May be used to remove the RF
input signal connected to the power sensor.

● Calibration Accuracy: A 1.00 mW, 50 MHz

reference output is available at the front panel

for calibrating the Power Meter and the Power
Sensor as a system. Calibration is accomp­lished using the CAL ADJ and CAL FACTOR
% controls. The CAL ADJ control compen­sates for slight differences in sensitivity
associated with a particular type of Power
Sensor and the CAL FACTOR % control
compensates for mismatch losses and effective
efficiency over the frequency range of the
Power Sensor.

● Recorder Output:

Provides a linear output
with respect to the input power level. For
each range, a +1.00 Vdc output corresponds
to a full scale input power level. Refer to
Table 1-1, Specifications, for the full-scale
range values associated with the various types

of Power Sensors available.

1-17. Two programming interfaces are available as
options for the Power Meter - a Hewlett-Packard
Interface Bus (HP-IB) Option 022; and a BCD

Interface, Option 024. Both interfaces allow full
remote control of all the power meter functions
(CAL FACTOR can be programmed to either

100% or the CAL FACTOR which has been
manually set on the front panel). These options
may be added by the user at a later time as his
requirements grow.

1-18. OPTIONS

1-19. Input-Output Options

1-20. Option 002.

A rear panel input connector is
connected in parallel with the front panel input
connector.

1-21. Option 003. A rear panel input connector

replaces the standard front panel input connector;
a rear panel POWER REF OUTPUT connector
replaces the standard front panel connector.

1-22. Cable Options

1-23. A 1.5

metre (5 ft.) Power Sensor Cable is
normally supplied. The 1.5 metre cable is omitted
with any cable option. The options and cable
lengths are shown in the table below.

Option

009
010
011
012
013

I

Cable Length

3.0 m (10 ft)

6.1 m (20 ft)

15.2 m (50 ft)

30.5 m (100 ft)

61.0 m (200 ft)

1-3

General Information

Model 436A

1-24. Remote Control Options

1-25. Options 022 and 024 add remote interface
capability to the Power Meter. Option 022 is
compatible with the Hewlett-Packard Interface Bus
(AH1, C0, DC2, DT1, L2, LE0, PP0, RL2, SH1,
SR0, T3, TE0); Option 024 uses dedicated
input/output lines to enable remote programming

and to provide parallel, BCD-coded output data.

1-26. Option 022 or 024 may be ordered in kit

form under HP part numbers 00436-60035 and
00436-60034 respectively. Each kit contains a
control assembly printed-circuit board, an input/
output assembly printed circuit board, and a data

cable for interconnection.

1-27. ACCESSORIES SUPPLIED

1-28. The accessories supplied with the Power

Meter are shown in Figure 1-1.

a.

The 1.5 metre (5 ft.) Power Sensor Cable,
HP 00436-60026, is used to couple the Power
Sensor to the Power Meter. The 1.5 metre cable is

omitted with any cable option.

b. The line power cable may be supplied in

one of four configurations. Refer to the paragraph

entitled Power Cables in Section II.

c. An alignment tool for adjusting the CAL

ADJ front panel control (HP Part No. 8710-0630).

1-29. EQUIPMENT REQUIRED BUT NOT

SUPPLIED

1-30. To form a complete RF power measurement
system, a Power Sensor such as the HP Model
8481A must be connected to the Power Meter via
the Power Sensor cable.

1-31.

EQUIPMENT AVAILABLE

1-32.

The HP Model 11683A Range Calibrator is
recommended for performance testing, adjusting,
and troubleshooting the Power Meter. The Power
Meter’s range-to-range accuracy and auto-zero

operation can easily be verified with the Calibrator.
It also has the capability of supplying a full-scale

test signal for each range.

1-33. Two extender boards (HP Part Numbers

5060-0258, and 5060-0990; 24 and 44 pins
respectively) enable the Power Meter printed
circuit assemblies to be accessed for service. Rubber
bumpers (HP Part No. 0403-0115) should be in­stalled on the extender boards to prevent the boards
from touching.

1-34. RECOMMENDED TEST EQUIPMENT

1-35. The test equipment shown in Table 1-2 is
recommended for use during performance testing,
adjustments,
optimum performance of the Power Meter, the
specifications of a substitute instrument must
equal or exceed the critical specifications shown in
the table.

1-36. SAFETY CONSIDERATIONS

1-37. The Power Meter is a Safety Class I
instrument. This instrument has been designed
according to international safety standards.

1-38. This operating and service manual contains
information, cautions, and warnings which must be
followed by the user to ensure safe operation and
to retain the instrument in safe condition.

and troubleshooting. To ensure

1-4

Model 436A

General Information

Table 1-2. Recommended Test Equipment

Instrument

Type

Range Calibrator

Digital Voltmeter

Power Meter

Thermistor
Mount

Counter

Oscilloscope

Critical Specifications

Chopped dc output for each range referenced

Function: DC, resistance

Range Resistance: 200 ohms
Vdc: 100 m Vdc, 1000 mVdc, 10 Vdc, 100 Vdc

10MQ

input impedance

6-digit resolution (±0.05% of reading, +0.02% of range)

Range: 1 mW

Transfer Accuracy (input -to-output): 0.2%
SWR: 1.05,50 MHz

Accuracy:
Frequency Range: 220 Hz, 50 MHz HP 5245L A

Sensitivity: 100 m Vrms
Accuracy: 0.01%

Bandwidth: dc to 50 MHz HP 180C/ T
Vertical Sensitivity: 0.2 V/division
Horizontal Sensitivity: 1 ms/division

±0.5% at 50 MHz **

to 1 mW range

Suggested

Model

HP 11683A
HP 3490A

HP 432A

HP 478A-H75

1801A/1821A

P,A,T

P,A,T

P, A

P, A

Use *

Logic Analyzer

*P = Performance Tests; A = Adjustments; T = Troubleshooting

**Traceable to the National Bureau of Standards

Clock Input: 60 kHz
Trigger Word: 8 Bits
Bit Input: TTL

Display Word: 8 Bits

HP 1601L

T

1-5/1-6

Model 436A

Installation

SECTION II

INSTALLATION

2-1. INTRODUCTION

2-2. This section provides all information neces-

sary to install the Power Meter. Covered in the
section are initial inspection, power requirements,
line voltage selection, interconnection, circuit

options, mounting, storage, and repackaging for

shipment.

2-3. INITIAL INSPECTION

2-4.

Inspect the shipping container for damage. If
the shipping container or cushioning material is
damaged, it should be kept until the contents of
the shipment have been checked for completeness
and the instrument has been checked mechanically
and electrically. The contents of the shipment
should be as shown in Figure 1-1. Procedures for
checking electrical performance are given in
Section IV. If the contents are incomplete, if there
is mechanical damage or defect, or if the instru­ment does not pass the electrical performance test,
notify the nearest Hewlett-Packard office. If the
shipping container is damaged, or the cushioning
material shows signs of stress, notify the carrier as
well as the Hewlett-Packard office. Keep the
shipping materials for the carrier’s inspection.

2-5. PREPARATION FOR USE
2-6. Power Requirements

2-7. The Power Meter requires a power source of
100, 120, 220, or 240 Vac, +5%, -0%, 48 to
440 Hz single phase. Power consumption is approx­imately 20 watts.

2-9. Figure 2-1 provides instructions for line
voltage and fuse selection. The line voltage
selection card and the proper fuse are factory
installed for 120 Vac operation.

SELECTION OF OPERATING VOLTAGE

1. Open cover door, pull the FUSE PULL lever
end rotate to left. Remove the fuse.

2. Remove the Line Voltage Selection Card.
Position the card so the line voltage appears
at top-left corner. Push the card firmly into
the slot.

3. Rotate the Fuse Pull lever to its normal posi­tion. Insert a fuse of the correct value in the
holder. Close the cover door.

Figure 2-1. Line Voltage Selection

If this instrument is to be energized via an
autotransformer for voltage reduction,

make sure the common terminal is
connected to the earthed pole of the

power source.

2-8. Line Voltage Selection

BEFORE SWITCHING ON THIS IN-

STR UMENT, make sure the instrument is
set to the voltage of the power source.

2-10. Power Cable

BEFORE SWITCHING ON

THIS IN-

STRUMENT, the protective earth termi-

nals of this instrument must be connected
to the protective conductor of the (mains)

power cord. The mains plug shall only be

inserted in a socket outlet provided with a

protective earth con tact. The protective

action must not be negated by the use of
an extension cord (power cable) without a

protective conductor (grounding).

2-1

Installation

Model 436A

Power Cable (cont’d)

2-11. In accordance with international safety
standards, this instrument is equipped with a three­wire power cable.

When connected to an
appropriate ac power receptacle, this cable grounds
the instrument cabinet. The type of power cable
plug shipped with each instrument depends on the

8481H Power Sensors provide identical full scale
outputs in response to input signal levels of 100

milliwatts and 3 watts, respectively.

erence in their sensitivity codes is detected by the
Power Meter, however, and the Power Meter digital

readout is automatically configured to indicate the

appropriate value.

country of destination. Refer to Figure 2-2 for the

part numbers of the power cable plugs available.

2-16. Hewlett-Packard Interface Bus Option 022.

Interconnection data for Hewlett-Packard Interface
Bus Option 022 is provided in Figure 2-3. Power
Meter programming and output data format is
described in Section III, Operation.

2-17. BCD Interface Bus Option 024. Inter-

connection data for BCD Interface Option 024 is
provided in Figure 2-4. Power Meter programming

8120-1378

8120-1351

and output data format is described in Section III,
Operation.

2-18. Mating Connectors
2-19. Interface Connectors.

nectors for Options 022 and 024 are indicated in
Figures 2-3 and 2-4, respectively.

The dif-

Interface mating con-

8120-1369

8120-1689

2-20. Coaxial Connectors. Coaxial mating con-

nectors used with the Power Meter should be US
MIL-C-39012-compatible type N male or 50-ohm

Figure 2-2. Power Cable HP Part Numbers

Versus Mains Plugs Available

2-12. Circuit Options

2-13. Jumper options are available for selecting a

BNC male.

2-21. Operating Environment

2-22. The operating environment should be within
the following limitations:

filtered or unfiltered dc RECORDER OUTPUT,

for changing the TALK and LISTEN addresses

when Hewlett-Packard Interface Bus Option 022 is
installed, and for selecting the desired pro-

Temperature . . . . . . . . . . . . 0°C to +55°C

Humidity . . . , . . . . . . . . . <95% relative

Altitude . . . . . . . . . .

gramming of the SENSOR ZERO function when

BCD Interface Option 024 is installed. Table 2-1
lists the factory installed jumper connections and
indicates how they may be reconnected to select
the options.

2-23. Bench Operation

2-24. The instrument cabinet has plastic feet and a
fold-away tilt stand for convenience in bench
operation. (The plastic feet are shaped to ensure
self-aligning of the instruments when stacked. ) The

2-14. Interconnections
2-15. Power Sensor.

For proper system operation,
the Power Sensor must be connected to the Power
Meter using either the Power Sensor cable supplied
with the Power Meter or any of the optional Power
Sensor cables specified in Section I. Each of these
cables employs a sensitivity line to enable the
Power Meter to determine the operating range of
the Power Sensor and thus, the true value of the
input signal. For example, the 8481A and

tilt stand raises the front of the instrument for
easier viewing of the control panel.

2-25. Rack Mounting

2-26. Instruments that are narrower than full rack
width may be rack mounted using Hewlett-Packard
sub-module cabinets. If it is desired to rack mount
one Power Meter by itself, order half-module kit,
HP Part Number 5061-0057. If it is desired to rack
mount two Power Meters side by side, order the
following items:

<4570 m (15,000 ft)

2-2

Model 436A

Installation

Rack Mounting (cont’d)

Rack Mount Flange Kit (two provided)

HP Part Number 5020-8862.

Front Horizontal Lock Links (four pro-

b.

vided) HP Part Number 0050-0515.

Rear Horizontal Lock Links (two pro-

vided HP Part Number 0050-0516.

2-27 In addition to the rack mounting hardware,
a front handle assembly (two provided) is also
available for the Power Meter. The part number is

HP 5060-9899.

2-28. STORAGE AND SHIPMENT
2-29. Environment

2-30. The instrument should be stored in a clean
dry environment. The following environmental
limitations apply to both storage and shipment:

Temperature . . . . . . . . . . . -40°C to +75°C

Humidity . . . . . . . . . . . . . <95% relative

Altitude . . . . . . . . . .

2-31. Packaging
2-32. Original Packaging.

<7620 m (25,000 ft)

Containers and materials
identical to those used in factory packaging are
available through Hewlett-Packard offices. If the
instrument is being returned to Hewlett-Packard
for servicing, attach a tag indicating the type of

service required,

return address, model number,
and full serial number. Also mark the container
FRAGILE to assure careful handling. In any
correspondence refer to the instrument by model
number and full serial number.

2-33. Other Packaging.

The following general
instructions should be used for re-packaging with
commercially available materials:

Wrap the instrument in heavy paper or

a.
plastic. (If shipping to a Hewlett-Packard office or
service center, attach a tag indicating the service
required, return address, model number, and full
serial number.)

b. Use a strong shipping container. A double­wall carton made of 275-lb test material is

adequate.

c.

Use enough shock-absorbing material (3
to 4-inch layer) around all sides of instrument to
provide firm cushion and prevent movement in the
container.

Protect the control panel with

cardboard.

d. Seal the shipping container securely.

Mark the shipping container FRAGILE to

e.

assure careful handling.

2-3

Installation

Model 436A

Table 2-1. Circuit Options

Assembly

A-D Converter
Assembly A3

BCD Interface
Control Assembly
A6 (Option 024)

Hewlett-Packard
Interface Bus Con­trol Assembly A6

(Option 022)

Service

Sheet

8

13

11

Jumper Functions

The factory-installed jumpers provide a filtered dc RECORDER OUTPUT
which corresponds to the average power input to the Power Sensor. If ex­ternal filtering is desired, reconnect the jumpers to provide the optional un­filtered dc RECORDER OUTPUT as shown on Service Sheet 8.

The factory-installed jumper enables the SENSOR ZERO function to be
programmed only when the REMOTE ENABLE input to the Power Meter
is low. If it is desired to program the SENSOR ZERO function independ­ently of the remote enable input, reconnect the jumper to provide +5 V
to U12C-9 as shown on Service Sheet 8.

The factory installed jumpers select TALK address M and LISTEN address

-

(minus sign) for the Power Meter. As shown on Service Sheet 11, either
of these addresses causes a high enable output at U2C-10. If it is desired
to change these addresses, refer to Service Sheet 11 and Table 2-2 and
reconnect the jumpers to decode the appropriate ASCII characters. For
example, to change to TALK address E and LISTEN address 70, the
jumpers would be reconnected as follows.

ASCII code (logic 1=0V)

DDDDDDD
1111111
0000000
7654321

M
E

-

%

Jumpers

M

-

1001101
1000101

0101101
0100101

U1B-13
U1B-12
U1B-10
U1B- 9
U2C- 9

HI01
LI02
HI03
HI04
HI05

Note: DI07 and DI06 must always be
1 and 0, respectively, for TALK address.

Note: DI07 and DI06 must always be
0 and 1, respectively, for LISTEN address.

E, % , Disconnect jumper from HI04
and reconnect to LI04.

2-4

Model 436A

Installation

Table 2-2. USA Standard Code for Information Interchange (ASCII)

NOTE

3

0 0

0 0 0
0 0
0 0
0

1

0

1

0

1

0

1

1

0 0

1

0 0

1

0

1

0
1 1
1 1
1

1

0

0

1

0

1

1

1

0

0

1

0

0

1

1

1

0
1

0

1

1

1

0

0

1

0

0

1

0

2
3

4

5
6
7
8

9

10
11
12
13
14

NUL

1

SOH
STX DC2
ETX
EOT
ENQ

ACK

BEL
BS
HT
LF SUB

VT
FF
CR GS
SO

D LE
DC1

DC3
DC4
NAK

SYN

ETB
CAN
EM

ESC
FS

RS

SP
!

“
#
$ 4

%
&
‘
(
)
*

+

,

–

0

1 A
2
3

5 E

6

7
8

9

<
=
>

@

B
C S
D

F
G
H

I

J

K

L
M
N

P
Q
R

T

UI
V
w

x
Y
Z

[
\

“

‘

a
b
c
d
e
f

g
h

i

i

k

l
m
n

p
q

r
s
t

u
v
w
x

y
z

(

;

)

1 1 1

1

15

SI

US

NOTE 3

NOTE 1: HP-IB valid LISTEN addresses
NOTE 2: HP-IB valid TALK addresses
NOTE 3: Logic 1 = OV

I

?

O

NOTE 1 NOTE 2

o

DEL

2-5

Installation

Model 436A

Logic Levels

The Hewlett-Packard Interface Bus logic levels are TTL compatible,
i.e., the true (1) state is 0.0 Vdc to 0.4 Vdc and the false (0) state is

+2.5 Vdc to +5.0 Vdc.

Programming and Output Data Format

Refer to Section III, Operation.

Mating Connector

HP 1251-0293; Amphenol 57-30240.

Mating Cables Available

HP 10631A, 1.0 metre (3 ft.); HP 10631B, 2.0 metres (6 ft.)

HP 10631C, 4.0 metres (12 ft.); HP 10631D, 0.5 metre (1.5 ft.)

Cabling Restrictions

A Hewlett-Packard Interface Bus System may contain no more

1.
than 1.8 metres (6 ft.) of connecting cable per instrument.

2.

The maximum accumulative length of connecting cable for any
Hewlett-Packard Interface Bus System is 20.0 metres (65.6 ft.)

2-6

Figure 2-3. Hewlett-Packard Interface Bus Connection

Model 436A

Installation

Logic Levels

The BCD Interface logic levels are TTL
compatible, i.e., the true state is 0.0 Vdc to

0.4 Vdc and the false state is +2.5 Vdc to

+5.0 Vdc.

Figure 2-4. BCD Interface Connection

Programming and Output Data Format

Refer to Section III, Operation

Mating Connectors
Mating Cables Available

- HP 1251-0086

- HP 562A-16C

for 5055A Printer

2-7/2-8

Model 436A

Operation

SECTION Ill
OPERATION

3-1. INTRODUCTION

3-2. This section provides complete operating
information for the Power Meter. Included in the
section are a description of all front- and rear-panel
controls,
features), operator’s checks, operating instructions,
power measurement accuracy considerations, and
operator’s maintenance.

3-3. Since the power Meter can be operated locally
as well as remotely via Hewlett-Packard Interface
Bus Option 022 or BCD Remote Interface Option
024, respectively, the information in this section is
arranged accordingly. All information unique to a

particular operating configuration is designated as
such; where no distinction is made, the informa­ion is applicable to both standard and optional
instrument operation.

3-4. PANEL FEATURES

3-5. Front and rear panel features of the Power
Meter are described in Figure 3-1. This figure
contains a detailed description of the controls,
connectors and indicators.

3-6. OPERATOR’S MAINTENANCE

3-7. The only maintenance the operator should
normally perform is replacement of the primary
power fuse located within Line Module Assembly
A11. For instructions on how to change the fuse,
refer to Section II, Line Voltage Selection.

Make sure that only fuses with the required
rated current and of the specified

connectors, and

indicators (panel

type (normal blow, time delay, etc.) are

used for replacement. The use of repaired
fuses and the short-circuiting of fuse­holders must be avoided.

3-8. OPERATOR’S CHECKS

3-9. A procedure for verifying the major func­tions of the Power Meter is provided in Fig­ure 3-2.
parts: Local Operation, Remote BCD Operation,
and Remote Hewlett-Packard Interface Bus Opera­tion. For a standard instrument it is only necessary
to perform the Local Operation procedure. For
units equipped with either of the remote options,
the Local Operation procedure should be per­formed first to establish a reference against which
remote operation can be verified. Information
covering remote programming of the Power Meter
is provided in the following paragraphs, and a
Hewlett-Packard Interface Bus Verification Pro­gram is provided in Section VIII, Service.

3-10. LOCAL OPERATING INSTRUCTIONS

The procedure is divided into three

3-11. Figure 3-3 provides general instructions for
operating the Power Meter via the front-panel
controls.

Any

interruption

of the protective
(grounding) conductor (inside or outside
the instrument) or disconnecting the

protective earth terminal is likely to make

this instrument dangerous. Intentional
interruption is prohibited.

3-1

Operation

Model 436A

FRONT AND REAR PANEL FEATURES

3-2

Figure 3-1. Front and Rear Panel Controls, Connector, and Indicators (1 of 4)