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)

H E A D Q U A R T E R S , D E P A R T M E N T O F T H E A R M Y

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
No. 1l-6625-2969-14&P)	DEPARTMENT OF THE ARMY
	WASHINGTON , 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 Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ 0 7 7 0 3 .

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

M o d e l 4 3 6 A

Contents

C O N T E N T S

Section		Page
0	INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1
0 - 1 S c o p e		0 - 1
0 - 2	I n d e x e s o f P u b l i c a t i o n s	. . . . . 0 - 1
0 - 3	F o r m s a n d R e c o r d s . . . . . . . . 0 - 1
0 - 4		0 - 1

0 - 5	A d m i n i s t r a t i v e S t o r a g e . . . . . 0 - 1
0 - 6	D e s t r u c t i o n o f A r m y E l e c t r o n i c s

						0 - 1
I		GENERAL INFORMATION . . . . .		.	.	1-1
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.		Input-Output Options . . . . . .		.	.	1-3
1-22.		Cable Options. . . . . . . . .		.	.	1-3
1-24.		Remote Control Options . . . . .		.	.	1-4
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		INSTALLATION . . . . . . . . .		.	.	2-1
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.		Circuit Options . . . . . . . .		.	.	2-2
2-14.		Interconnections . . . . . . . .		.	.	2-2
2-18.		Mating Connectors . . . . . . .		.	.	2-2
2-21.		Operating Environment. . . . . .		.	.	2-2
2-23.		Bench	Operation . . . . . . . .	.	.	2-2
2-25.		Rack Mounting . . . . . . . .		.	.	2-2
2-28.		Storage and Shipment . . . . . . .		.	.	2-3
2-29.		Environment . . . . . . . . .		. . 2-3
2-31.		Packaging. . . . . .. . . . . . . . . . . . . . . . . . . . . 2-3
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
		Operation . . . . . . . . . .		. .3-20
3-14.		Compatibility . . . . . . . . .		. .3-20
3-18.		DataMessages. . . . . . . . .		. .3-20
3-21.		Receiving Data Messages . . . . .		.	.3-20
3-32.		Sending Data Messages from the Power
		Meter . . . . . . . . . .		.	.3-24

Section								Page
3-40.	Receiving the Trigger Message . . . . . . . 3-29
3-42.	Receiving the Clear Message . . . . . . . . 3-29
3-44.	Receiving the Remote Message . . . . . . . 3-29
3-46.	Receiving the Local Message . . . . . . . . 3-29
3-48.	Receiving the Local Lockout and Clear
		Lockout Set Local Messages . . . . . . . 3-29
3-50.	Receiving the Pass Control Message . . . . .							3-29
3-52.	Sending the Required Service Message . . . . 3-29
3-54.	Sending the Status Byte Message . . . . . . 3-29
3-56.	Sending the Status Bit Message . . . .. . . 3-29
3-58.	Receiving the						Abort Message . . . . . . .	3-29
3-60.	Test of HP-IB Operation . . . . . . . . . 3-29
3-62.	Remote BCD Interface Operation . . . . . 3-29
3-65.	Output			Data			Format . . . . . . . .	3-36
3-67.	BCD Remote Programming . . . . . . 3-36
3-73.	Power		Measurement Accuracy . . . . .					3-37
3-75.	Sources		of	Error		and Measurement .
	Uncertainty . . . . . . . . . . . 3-37
3-81.	Corrections for Error . . . . . . . . 3-38
3-86.	Calculating Total Uncertainty . . . . . 3-38
IV	PERFORMANCE TESTS . . . . . . . . 4-1
4-1.	Introduction . . . . . . . . . . . . 4-1
4-3.	Equipment				Required . . . . . . . . .			4-1
4-5.	Test Record . . . . . . . . . . . .. . . . . . . . . . . . 4-1
4-7.	Performance				Tests . . . . . . . . . .			4-1
4-10.	Zero Carryover Test . . . . . . . . . . 4-2
4-11.	Instrument Accuracy Test . . . . . . . . 4-3
4-12.	Calibration				Factor		Test . . . . . . . .	4-6
4-13.	Power Reference Level Test . . . . . . . 4-7
V	ADJUSTMENTS . . . . . . . . . . .							5-1
5-1. Introduction . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 5-1
5-4.	Safety Considerations . . . . . . . . . 5-1
5-10.	Equipment Required . . . . . . . . . 5-1
5-12.	Factory Selected Components . . . . . . 5-1
5-14.	Adjustment				Locations . . . . . . . . .			5-1
5-16.	DC Offset				Adjustment . . . . . . . . .			5-2
5-17.	Auto	Zero			Offset Adjustment . . . . . .			5-3
5-18.	Spike Balance Adjustment . . . . . . . 5-4
5-19.	Multivibrator				Adjustment . . . . . . . .			5-5
5-20. A-D Converter and Linear Meter Adjustment. . 5-6
5-21.	Power		Reference			Oscillator
	Frequency				Adjustment . . . . . . . .			5-8
5-22.	Power	Reference				Oscillator Level
	Adjustment . . . . . . . . . . . . . . . . . . . . . . 5-9
VI	REPLACEABLE PARTS . . . . . . . . 6-1
6-1.	Introduction . . . . . . . . . . . . 6-1
6-3.	Abbreviations . . . . . . . . . . . . 6-1
6-5.	Replaceable Parts List . . . . . . . . . 6-1
6-7.	Ordering			Information . . . . . . . . .				6-1

i i i

C o n t e n ts							M o d e l 4 3 6 A
				C O N T E N T S ( C o n t ’ d )
Section					Page	Section		Page
6-10.	Parts	Provisioning . . . . . . . . . .			6-1	8-24.	Basic Circuit Descriptions . . . . . . . 8-7
6-12.	Direct	Mail Order		System . . . . . . . .	6-1	8-25.	Linear Integrated Circuits . . . . . . 8-7
6 - 1 3	C r o s s R e f e r e n c e I n d e x . . . . .				6 - 2 1	8-30.	Digital Integrated Circuits and Symbols . 8-7
VII	MANUAL CHANGES . . . . . . . . .				7-1	8-55.	Troubleshooting . . . . . . . . . .	8-16
7-1.	Introduction . . . . . . . . . . . .				7-1	8-59.	Standard Instrument Checkout . . . .	8-16
7-3.	Manual Changes . . . . . . . . . . .				7-1	8-64.	HP-IB Instrument Checkout . . . . .	8-69
7-6.	Manual	Change	Instructions . . . . . . .		7-1	8-68.	BCD Instrument Checkout . . . . .	8-117
						8-70.	Block Diagram Circuit Descriptions . . .	8-123
VIII	SERVICE . . . . . . . . . . . .				.8-1	8-71.	Service Sheet 1 . . . . . . . . .	8-123
8-1.	Introduction . . . . . . . . . . .				8-1	8-75.	Service Sheet 2 . . . . . . . . .	8-124
8-3.	Safety Considerations . . . . . . . .				8-1	8-87.	Service Sheet 3 . . . . . . . . .	8-128
8-9.	Recommended Test Equipment . . . . .				8-5	8-114.	Service Sheet 4 . . . . . . . . .	8-150
8-11.	Service	Adds . . . . . . . . . . .			8-5	8-117.	Command Mode Operation . . . . .	8-150
8-16.	Repair . . . . . . . . . . . . .				8-5	8-130.	Data Mode Operation . . . . . .	8-153
8-17.	Factory Selected Components . . . .				8-5	8-155.	Service Sheet 5 . . . . . . . . .	8-163
8-19.	Disassembly		and	Reassembly Procedures .	8-5

APPENDIX	A.
	B.
S e c t i o n	I .
	II.
APPENDIX	C.
	D.
S e c t i o n	I .
	II.
	III .
	IV.
APPENDIX	E.

	APPENDIXES
References	..	..	..	..	..	..	..	..	.. P a g e	A - 1
C o m p o n e n t s o f E n d I t e m L i s t
I n t r o d u c t i o n										B-1
Integral	Components		of End		Item . . . . . . . . . .					B-2
A d d i t i o n a l A u t h o r i z a t i o n L i s t								( N / A )
M a i n t e n a n c e A l l o c a t i o n
I n t r o d u c t i o n										D-1
M a i n t e n a n c e A l l o c a t i o n C h a r t										D-3
T o o l s a n d T e s t E q u i p m e n t R e q u i r e m e n t s . . . . . .										D - 5
R e m a r k s ( N / A )
E x p e n d a b l e S u p p l i e s a n d M a t e r i a l s L i s t ( N / A )

I L L U S T R A T I O N S

Figure

Page

Figure

Page

3-7.

Test

of HP-IB

Operation Flowchart . . .

3-30

1-1.

HP Model 436A Power Meter and Accessories

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

Supplied . . . . . . . . . .

.1-0

3-9.

Calculating Measurement Uncertainties . .

3-42

2-1.

Line

Voltage

Selection . . . . . . . .

2-1

3-10. The Effect of Power Sensor Mismatch

on

Measurement

Accuracy . . . . . .

3-44

2-2. Power Cable HP Part Numbers Versus

3-11. Calculating Measurement Uncertainty

Mains

Plugs Available . . . . . . .

2-2

(Uncertainty

in

dB

Known) . . . . .

3-45

2-3.

Hewlett-Packard Interface Bus Connection .

2-6

2-4.

BCD

Interface

Connection. . . . . . .

2-7

4-1.

Zero Carryover Test Setup. . . . . . .

4-2

3-1.

Front

and

Rear

Panel Controls, Connectors,

4-2.

Instrument

Accuracy

Test Setup . . . .

4-4

4-3.

Calibration

Factor

Test

Setup . . . . .

4-6

and Indicators. . . . . . . . . .

3-2

4-4.

Power

Reference Level

Test Setup . . . .

4-8

3-2.

Operator’s Checks . . . . . . . . .

3-6

3-3.

Operating

Instructions . . . . . . . .

3-16

5-1.

DC

Offset

Adjustment

Setup . . . . . .

5-2

3-4.

Power Meter Response Curve (Settling Time for

5-2.

Auto

Zero

Offset

Adjustment Setup . . .

5-3

Analog

Circuits) . . . . . . . . .

3-26

5-3.

Spike

Balance

Adjustment Setup . . . .

5-4

3-5.

Measurement

Timing

Flow Chart (Settling

5-4.

Multivibrator Adjustment Setup . . . . .

5-5

Time

for

Digital

Circuitry) . . . . .

3-27

5-5.

A-D Converter and Linear Meter

3-6.

Operating Program

Simplified Flow Chart. .

3-28

Adjustment

Setup . . . . . . . .

5-6

i v

M o d e l 4 3 6 A	Contents
	I L L U S T R A T I O N S ( C o n t ’ d )

Figure									Page
5-6.	Power		Reference				Oscillator	Frequency
		Adjustment				Setup . . . . . . .			5-8
5-7.	Power		Reference Oscillator					Level
		Adjustment Setup . . . . . . .							5-9
6-1.		Cabinet Parts . . . . . . . . . .							6-18
8-1.		Schematic Diagram Notes . . . . . .							8-2
8-2.		Front Panel Removal . . . . . . .							8-6
8-3.		Operational			Amplifier Functional Circuits.				8-8
8-4.		Dual D-Type Flip-Flop . . . . . . .							8-9
8-5.		Four-Bit		Bistable			Latch. . . . . . .		8-9
8-6.	Dual J-K Master/Slave Flip-Flop and Gate
		Pulse		Timing. . . . . . . . .					8-10
8-7.		Dual J-K Edge-Triggered Flip-Flop . . .							8-10
8-8.		Programmable				Counters . . . . . .			8-11
8-9.		3-Line	to	8-Line			Decoder . . . . . .		8-12
8-10.		8-Input Data Selector (Multiplexer) . . .							8-13
8-11.		LED Display Driver . . . . . . . .							8-14
8-12.		Numeric		Display . . . . . . . . .					8-15
8-13.		MOS and TTL ROMs . . . . . . .							8-15
8-14.		Power Meter Operating Cycle . . . . .							8-17
8-15.		Operating Program Flow						Chart . . . .	8-25
8-16. HP-IB			Verification				Program
		(HP	9830A			Calculator) . . . . . .			8-70
8-17. HP-IB			Verification				Program
		(HP 9820A Calculator) . . . . . .							8-95
8-18.		Analog-to-Digital Converter Simplified
		Diagram			and		Waveforms . . . . .		8-126
8-19.		HP-IB Listen Handshake Timing . . . .							8-151
8-20.		Data Valid Status Generator Timing . .							8-160
8-21.		Overall	Block			Diagram . . . . . . .			8-167
8-22.	AC Gain, A-D Converter and Display
		Circuits Block Diagram . . . . . .							8-169
8-23.		Controller		and		Counters Block Diagram .			8-171
8-24. HP-IB (Option 022) Circuit Block Diagram									8-173
8-25.	BCD Interface					(Option 024)		Circuit
		Block		Diagram . . . . . . . .					8-175
8-26. AlAl Display						Assembly Component
		Locations . . . . . . . . . . .							8-177
8-27.	A1A2		Pushbutton				Assembly
		Component				Locations . . . . . . .			8-177
8-28.	Front Panel				Assembly
		Schematic				Diagram .		, . . . . . .	8-177
8-29.	A2 AC		Gain		Assembly Component, Test
		Point,		and		Adjustment		Locations . . .	8-179

Figure					Page
8-30. AC Gain Assembly			Schematic Diagram . .		8-179
8-31. A1A3 CAL FACTOR % Switch Assembly
Component		Locations . . . . . . .			8-181
8-32. A3 A-D Converter Assembly
Components, Test			Point, and
Adjustment		Locations . . . . . . .			8-181
8-33. A-D Converter Assembly
Schematic		Diagram . . . . . . . .			8-181
8-34. A4 Counter Relative Assembly
Component		and Test Point
Locations . . . . . . . . . . . . . . . . . . . . . . . . .					8-183
8-35. Counter Relative Assembly
Schematic		Diagram . . . . . . . .			8-183
8-36. A5 Controller Assembly Component
and	Test	Point	Locations . . . . . .		8-185
8-37. Controller Assembly
Schematic		Diagram . . . . . . . .			8-185
8-38. A6 HP-IB (Option 022) Control
Assembly Component and
Test	Point	Locations . . . . . . .			8-186
8-39. HP-IB (Option 022) Control Assembly
Schematic		Diagram . . . . . . . .			8-187
8-40. A7 HP-IB (Option 022) Input/Output
Assembly Component and				Test
Point	Locations . . . . . . . . .				8-189
8-41. HP-IB (Option 022) Input/Output Assembly
Schematic		Diagram . . . . . . . .			8-189
8-42. A6 BCD Interface Control (Option 024)
Assembly Component and
Test	Point	Locations . . . . . . .			8-191
8-43. BCD Interface Control (Option 024)
Assembly		Schematic Diagram . . . .			8-191
8-44. A8 Power Reference Oscillator Assembly
Component,		Test	Point, and
Adjustment		Locations . . . . . . .			8-193
8-45. Power Reference Oscillator Assembly
Schematic		Diagram . . . . . . . .			8-193
8-46. A9 Power Supply Rectifier and Regulator
Assembly		Component		and -
Test	Point	Locations . . . . . . .			8-195
8-47. Rear Panel Mounted Power Supply
Component		Locations . . . . . . .			8-195
8-48. Power Supply Rectifier and Regulator
Assembly Schematic Diagram . . . .					8-195
8-49. Rear View of		Front	Panel (Removed) . . .		8-197
8-50. Top Internal View Standard				Instrument . .	8-197
8-51. Top Internal View HP-IB or
BCD	Interface . . . . . . . . .				8-197

v

C o n t e n ts

M o d e l 4 3 6 A

T A B L E S

Table							Page
1-1.		Specifications . . . . . . . . . . . .					1-2
1-2.		Recommended Test Equipment . . . . . .					1-5
2-1.		Circuit	Options . . . . . . . . . . .				2-4
2-2.		USA Standard Code for Information
		Interchange (ASCII) . . . . . . . .					2-5
3-1.		Message Reference Table . . . . . . . .					3-21
3-2.		Measurement Sequence . . . . . . . .					3-22
3-3.		Hewlett-Packard Interface Bus
		Input Program Codes . . . . . . . .					3-23
3-4.		Hewlett-Packard Interface Bus
		Output		Data	String . . . . . . . . .		3-25
3-5.	Power Meter Remote Access Time to
		First Output			Data	Character . . . . . .	3-26
3-6.	Power Meter Output Data Printout for
		HP	5055A Digital Recorder . . . . . .				3-36
3-7.		BCD Output Data Codes . . . . . . . .					3-39
3-8.		BCD	Programming Commands . . . . . .				3-41
4-1.	Zero Carryover Autorange Digital
		Readout Results . . . . . . . . . .					4-3
4-2.		Instrument		Accuracy		Test Results . . . . .	4-5

S E R V I C E

Table				Page
4-3.	Instrument Accuracy Test Results
	for dB [REF] Mode . . . . . . .		.	4-5
4-4.	Calibration Factor Test Results . . . . .		.	4-7
4-5.	Performance Test Record . . . . . . .		.	4-10
5-1.	Factory Selected Components . . . . .		.	5-2
6-1.	Reference Designators and Abbreviations . .		. ..6-2
6-2.	Replaceable	Parts . . . . . . . . .	. .6-4
6-3.	Code List of Manufacturers . . . . . .		.	6-19
7-1.	Manual Changes by Serial Number . . . .		. .7-1
8-1.	Logic Levels and Power Requirements . . .		. .8-9
8-2.	Program Mnemonic Descriptions . . . .		. 8 - 2 0
8-3.	Standard Instrument Checkout . . . . .		. 8 - 5 2
8-4.	HP-IB Circuit Troubleshooting . . . . .		. 8 - 9 9
8-5.	BCD Interface Option 024 Checkout . . .		.8-117
8-6.	Operating Program Description . . . . .		.8-130
8 - 7 .	Up/Down Count Control Logic Steering . .		8-145
8-8.	Function Decoder Clock Selection . . . .		.8-155
8-9.	Programming	Command Logic
	Operating	Summary . . . . . . . .	8-155
8-10. Power Meter Talk HP-IB Output
	Data Format . . . . . . . . . .			8-161

S H E E T S

Service Sheet		Page	Service Sheet		Page
1	Overall Block Diagram . . . . . . . . . . . . . . . .	.8-166	8	A-D Converter Assembly (A1A3, A3) .	. . . . . .8-180
2	AC Gain, A-D Converter, and Display Circuits		9	Counter Relative Assembly (A4) . . . .	. . . . . .8-182
	Block Diagram (A1A1, A2, A3) . . . . . . .	.8-168	10	Controller Assembly (A5). . . . . . . . .	. . . . . .8-184
3	Controller and Counters Block Diagram		11	HP-IB (Option 022) Control Assembly	(A6) . . .8-186
	(A1A2, A4, A5) . . . . . . . . . . . . . . . . . . . .	.8-170	12	HP-IB (Option 022) Input/Output
4	HP-IB (Option 022) Circuit Block			Assembly (A7) . . . . . . . . . . . . . . .	. . . . . . . .8-188
	Diagram (A6, A7) . . . . . . . . . . . . . . . . .	8-172	13	BCD Interface Control (Option 024)
5	BCD Interface (Option 024) Circuit			Assembly (A6, A7) . . . . . . . . . .	. . . . . .8-190
	Block Diagram (A6, A7). . . . . . . . . . . . .	8-174	14	Power Reference Oscillator Assembly	(A8). . . .8-192
6	Front Panel Assembly (A1A1, A1A2) . . . . . . .	8-176	15	Power Supply Rectifier and Regulator
7	AC Gain Assembly (A2) . . . . . . . . . . . . . . . .	8-178		Assembly (A9, A10) . . . . . . . . .	. . . . . .8-194

v i

Model 436A

Safety Considerations

SAFETY CONSIDERATIONS

GENERAL

SAFETY EARTH GROUND

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.

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

TM ll-6625-2969-14&P

SECTION 0

INSTRUCTIONS

0-1. SCOPE .

This manual describes Power Meter TS-3793/U (fig. 1-1) and provides operation and maintenance instructions. Throughout this manual, the TS-3793/U is referred to as the Hewlett-Packard Model 436A Power Meter.

0-2. INDEXES OF PUBLICATIONS.

a. DA Pam 310-4. Refer to the latest issue of DA Pam 310-4 to determine whether there are new editions, changes, or additional publications pertaining to the equipment.

b. DA Pam 310-7. Refer to DA Pam 310-7 to determine whether there are modification work orders (MWO’S) pertaining to the equipment.

0-3. FORMS AND RECORDS.

a.Reports of Maintenance and Unsatisfactory Equipment. Maintenance

forms,	records, and reports which are to be used by maintenance	personnel
at all	levels of maintenance are listed in and prescribed by TM	38-750.

Report of Packaging and Handling Deficiencies. Fill out and forward b. Report of Packaging Improvement Report) as prescribed in AR 700-58/

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

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. REPORTING OF EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR).

EIR’s will be prepared using DA Form 2407, Maintenance Requiest. Instructions for preparing EIR’s are provided in TM 38-750, The Army Maintenance Management System. EIR’s should be mailed directly to Commander, US Army Communications and Electronics Materiel Readiness Command and Fort Monmouth, ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ 07703. A reply will be furnished directly to you.

0-5. ADMINISTRATIVE STORAGE.

Administrative storage of equipment issued to and used by Army activities shall be in accordance with TM 740-90-1.

0-6. DESTRUCTION OF ARMY ELECTRONICS MATERIEL.

Destruction of Army Electronics materiel to prevent enemy use shall be in accordance with TM 750-244-2.

0-1

General Information

Model 436A

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

1-0

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 Information Supplement may be 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 specifications are listed in 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.

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

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 information that documents the 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 of the supplement are available from 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.

1-16. Significant operating features of the Power Meter are as follows:

●Digital Display: The display is a four-digit, seven-segment LED, plus a sign when in the

dBm or dB (REL) mode. It also has underand

1-1

Model 436A

DESCRIPTION (cont’d).

overrange indicators. There is a 20 percent overrange capability 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: The units

annunciator provides error-free 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

General Information

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 - 1 8 . O P T I O N S

1 - 1 9 . I n p u t - O u t p u t O p t i o n s

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	Cable Length
009	3.0 m (10 ft)
010	6.1 m (20 ft)
011	15.2 m (50 ft)
012	30.5 m (100 ft)
013	61.0 m (200 ft)
	I

1-3

General Information

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.

Model 436A

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, and troubleshooting. To ensure 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.

1-4

Model 436A

Installation

SECTION II

I N S T A L L A T I O N

2-1. INTRODUCTION

2-2. This section provides all information necessary 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.

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

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

2-10. Power Cable

BEFORE SWITCHING ON THIS INSTRUMENT, the protective earth terminals 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

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 country of destination. Refer to Figure 2-2 for the part numbers of the power cable plugs available.

8120-1378

8120-1351

8120-1369

8120-1689

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 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 programming 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.

2-14. 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

Model 436A

8481H Power Sensors provide identical full scale outputs in response to input signal levels of 100 milliwatts and 3 watts, respectively. The diference 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.

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. Interconnection data for BCD Interface Option 024 is provided in Figure 2-4. Power Meter programming and output data format is described in Section III, Operation.

2-18. Mating Connectors

2-19. Interface Connectors. Interface mating connectors for Options 022 and 024 are indicated in Figures 2-3 and 2-4, respectively.

2-20. Coaxial Connectors. Coaxial mating connectors used with the Power Meter should be US MIL-C-39012-compatible type N male or 50-ohm BNC male.

2-21. Operating Environment

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

Temperature . . . . . . . . . . . . 0°C to +55°C Humidity . . . , . . . . . . . . . <95% relative Altitude . . . . . . . . . . <4570 m (15,000 ft)

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 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:

2-2

Model 436A

Rack Mounting (cont’d)

Rack Mount Flange Kit (two provided) HP Part Number 5020-8862.

b. Front Horizontal Lock Links (four provided) HP Part Number 0050-0515.

Rear Horizontal Lock Links (two provided 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 . . . . . . . . . . <7620 m (25,000 ft)

2-31. Packaging

2-32. Original Packaging. 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

Installation

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:

a.Wrap the instrument in heavy paper or 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.

e.Mark the shipping container FRAGILE to assure careful handling.

2-3

Installation												Model 436A
				Table 2-1. Circuit Options
		Assembly	Service							Jumper Functions
			Sheet
		A-D Converter	8	The factory-installed jumpers provide a filtered dc RECORDER OUTPUT
		Assembly A3		which corresponds to the average power input to the Power Sensor. If ex-
				ternal filtering is desired, reconnect the jumpers to provide the optional un-
				filtered dc RECORDER OUTPUT as shown on Service Sheet 8.
		BCD Interface	13	The factory-installed jumper enables the SENSOR ZERO function to be
		Control Assembly		programmed only when the REMOTE ENABLE input to the Power Meter
		A6 (Option 024)		is low. If it is desired to program the SENSOR ZERO function independ-
				ently of the remote enable input, reconnect the jumper to provide +5 V
				to U12C-9 as shown on Service Sheet 8.
		Hewlett-Packard	11	The factory installed jumpers select TALK address M and LISTEN address
		Interface Bus Con-		- (minus sign) for the Power Meter. As shown on Service Sheet 11, either
		trol Assembly A6		of these addresses causes a high enable output at U2C-10. If it is desired
		(Option 022)		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)
					D D D D D D D
					1	1	1	1	1	1	1
					0	0	0	0	0	0	0
					7	6	5	4	3	2	1
				M	1	0	0	1	1	0	1	Note: DI07 and DI06 must always be
				E	1	0	0	0	1	0	1	1 and 0, respectively, for TALK address.
				-	0	1	0	1	1	0	1	Note: DI07 and DI06 must always be
				%	0	1	0	0	1	0	1	0 and 1, respectively, for LISTEN address.
				Jumpers
				M	U1B-13				HI01			E, % , Disconnect jumper from HI04
				-	U1B-12				LI02			and reconnect to LI04.
					U1B-10				HI03
					U1B- 9				HI04
					U2C- 9				HI05

2-4

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

1.A Hewlett-Packard Interface Bus System may contain no more 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.)

Figure 2-3. Hewlett-Packard Interface Bus Connection

2-6

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.

Programming and Output Data Format

Refer to Section III, Operation

Mating Connectors - HP 1251-0086 Mating Cables Available - HP 562A-16C

for 5055A Printer

Figure 2-4. BCD Interface Connection

2-7/2-8

Model 436A

Operation

S E C T I O N I l l

O P E R A T I O N

3-1. INTRODUCTION

3-2. This section provides complete operating information for the Power Meter. Included in the section are a description of all frontand rear-panel controls, connectors, and indicators (panel 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

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 Fig- ure 3-2. The procedure is divided into three 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

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

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

3-2