HP E42 User Manual
TM 11-6625-2941-14&P
TECHNICAL MANUAL
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
FOR
COUNTER, ELECTRONIC, DIGITAL READOUT
AN/USM-459
(HEWLETT-PACKARD MODEL 5328A/E42)
(NSN 6625-01-061-8928)
HEADQUARTERS, DEPARTMENT OF THE ARMY
MARCH 1979
This manual contains copyright material reproduced by permission of the
Hewlett-Packard Company.
TM 11-6625-2941-14 + P
Technical Manual
No. 11-6625-2941-14 + P
OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING
REPAIR PARTS AND SPECIAL TOOLS LIST
COUNTER, ELECTRONIC, DIGITAL READOUT
You can improve this manual by recommending improvements using
DA Form 2028-2
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
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, New Jersey 07703.
HEADQUARTERS,
DEPARTMENT OF THE ARMY
Washington, DC 28 March 1979
FOR
AN/USM-459
(HEWLETT-PACKARD MODEL 5328A/E42)
(NSN 6625-01-061-8928)
REPORTING OF ERRORS
located in the back of the manual.
simply
in the back of
In either case a reply will be furnished direct to you.
s
This manual is an authentication of the manufacturer
commercial literature
which, through usage, has been found to cover the data required to operate
and maintain this equipment.
The manual was not prepared in accordance with
military specifications; therefore, the format has not been structured to
consider categories of maintenance.
TABLE OF CONTENTS
Section
0
INTRODUCTION
Page
0-1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1
0-2 Indexes of Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1
0-3 Forms and Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1
0-4 Reporting Equipment Improvement Recommendations (EIR) . . 0-1
0-5 Administrative Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-1
0-6 Destruction of Army Electronics Material . . . . . . . . . . . . . . . . . . . . . . . 0-1
i/ii (blank)
TABLE OF CONTENTS
Model 5328A
Table of Contents
Section
I
II INSTALLATION
Ill
GENERAL INFORMATION
1-1.
1-4.
1-6.
1-8.
1-16. Equipment Supplied and Accessories Available
1-18. Specifications
2-1.
2-3.
2-5.
2-6.
2-8.
2-10.
2-13.
2-15.
2-17.
2-19. Packaging for Shipment
2-20.
2-24.
2-26. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION (OPERATORS INSTRUCTIONS)
3-1.
3-3.
3-9.
3-13. Time Interval Measurements
3-20. Ratio Measurements
3-23. Operating Controls
3-26. Function of Controls, Indicators, Inputs, and Outputs
3-27.
3-29.
3-31.
3-33.
3-35.
3-37.
3-41.
3-44.
3-49.
3-51.
3-53.
3-57.
3-59.
3-61.
3-63.
3-65.
3-68. Programming Operation
3-71. Setting Add dress Switches
3-75. Measurement Output Format
3-77. Bus Commands
3-79. Programming Examples
Scope of Manual . .
Description
Instrument Identification
Applications
Introduction
Unpacking and Inspection
Preparation for Use
Introduction
Frequency Measurements
Period Measurements
Trigger Lights
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Power Requirements
Fuse Replacement and Installation
Power Cables . .
Operating Environment
Bench Operation
Rack Mounting
Original Packaging
Other Packaging Methods
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Display
Power (Line)
Reset
Sample Rate Control
Arming
Frequency Resoluton, N Switch
Input Channel Section
A and B Channel Signal Conditioning
Channel C Input
“C’’ Channel Overload Indicator . . . . . . . . . . . . . . . . . . . . . . . .
Hysteresis Band of Trigger Levels
External Frequency Standard Input. . . . . . . . . . . . . . . . . . . . . . . .
Marker Outputs
Gate/Marker Out . .
1 MHz and 10 MHz Frequency Standard Outputs
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Page
1-1
1-1
1-1
1-1
1-2
1-2
1-2
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-2
2-2
2-2
2-2
2-2
2-3
2-3
3-1
3-1
3-1
3-2
3-3
3-4
3-4
3-8
3-8
3-8
3-8
3-8
3-8
3-9
3-10
3-10
3-12
3-12
3-12
3-12
3-13
3-13
3-13
3-13
3-13
3-13
3-16
3-16
3-18
iii
Model 5328A
Table of Contents
TABLE OF CONTENTS (Continued)
Section
IV
Page
THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4-1.
4-3.
4-5.
4-7.
4-15.
4-18.
4-20.
4-22.
4-24.
4-27.
4-34.
4-36.
4-41.
4-43.
4-48.
4-52.
4-57.
4-60.
4-62.
4-64.
4-67.
4-69.
4-17.
4-73.
4-75.
4-79.
4-83.
4-85.
4-89.
4-91.
4-94.
4-96.
4-99.
4-103. A16 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-107. Remote Controllable (Programmable) Input Block
4-115. Remote Controllable (Programmable) Input
4-117.
4-122.
4-127.
4-147.
4-156.
4-162. HP interface Bus Theory
4-173. HP-lB A15 Interface Operation
4-178.
4-181.
4-183.
4-185.
4-187.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overall Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Basic Counter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Time Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Time interval, Resolution, and Averaging Techniques . . . . . . .
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Time Interval Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Sources of Measurement Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
±1 Count Ambiguity . . . . . .
Time Base Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Trigger Error
5328A Principles of Operation
Main Counter Section
Input Section
Hewlett-Packard Interface Bus (HP-lB) Section . . . . . . . . . . . . 4-9
Al Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Display Control
State Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A3 Oscillator Support . . . .
A3 Oscillator Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A3A1 Oscillator (HP 10544A) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Decade Counting Assembly (DCA) . . . . . . . . . . . . . . . . . . . . . . . . .
Time Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A2 Power Supply
+5V Supply
A4 Function Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Speed Multiplexer, Main Gate, and 1st Decade . . . . . .
Arming Multiplexer and Arming FF
Time Base Multiplexer and Main Gate FF . . . . . . . . . . . . . . . . .
An Example of Operation
Diagram Description . . . . . .
Schematic Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A19 Switch Control Board . . . .
A12 Amplifier Board
A10 Synchronizer Board . . . .
A11 DAC Board . . . . . . . . . . . . .
A8 Channel C lnput
Overall Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bus Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Listen Mode . . . . . . . . . . . . . . . .
Talk Mode . . . . . . . . . . . . . . . . .
A15 Circuit Operation
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4-1
4-2
4-3
4-5
4-6
4-7
4-7
4-9
4-10
4-10
4-10
4-10
4-10
4-10
4-11
4-11
4-11
4-12
4-12
4-12
4-13
4-13
4-13
4-14
4-16
4-16
4-16
4-17
4-20
4-20
4-21
4-22
4-22
TABLE OF CONTENTS (Continued)
Model 5328A
Table of Contents
Section
V
MAINTENANCE
Introduction . . .
5-1.
Assembly Designations . . . . . . . . . .
5-3.
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-5.
Assembly Connection Identification
5-7.
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-9.
5-11.
5-13.
5-15.
5-17. Repair . . . . . . . .
5-18.
5-20.
5-22. Adjustments . . . . . . . . . . . . .
5-25.
5-26.
5-27. Troubleshooting . . . . . . . . . . .
5-29. Troubleshooting Aids . .
5-31.
5-33.
5-35.
5-43. Troubleshooting Input Channels
5-45.
5-54. Removal and Replacement Instructions
5-56.
5-58.
5-60.
Time Interval Module (Assemblies A10 and A19)
A16 Display Assembly Removal and Replacement . . . . . . . . . .
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Inspection . . .
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Printed Circuit Component Replacement . . . . . . . . . . . . . . . . . .
Replacing Integrated Circuits
Sensitivity Adjustments
Adjustment of A3 Oscillator Support . . . . . . . . . . . . . . . . . . . . . .
Extender Board (05328-62016) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
lC Troubleshooting . . . .
Function Signals . . . . . . .
Local Mode Troubleshooting
Instrument Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Page
5-1
5-1
5-1
5-1
5-1
5-2
5-3
5-3
5-3
5-3
5-3
5-3
5-19
5-19
5-24
5-24
5-24
5-24
5-26
5-26
5-41
5-41
5-45
5-45
5-45
5-45
VI
Vll
Vlll
APPENDIX A. REFERENCES
REPLACEABLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1.
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3.
HP Part Number Organization . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5.
6-7.
6-10.
6-12.
6-14. Factory Selected Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-16. Part Number to NSN Cross Reference Index . . . . . . . . . . . . . . . . .
MANUAL CHANGES
7-1.
7-3.
SCHEMATIC DIAGRAMS
8-1.
8-3.
8-5.
8-7.
8-9.
8-14. Assembly Locations and Component Locators
8-16. Factor Selected Components
B. COMPONENTS OF END ITEM LIST . . . . . . . . . . . . . . . . . . . .
C.
D.
E.
Component Parts and Materials . . . . . . . . . . . . . . . . . . . . . . . . . .
General Usage Parts
Specific Instrument Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Changes Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic Diagrams SymboIs and Reference Designators . . . . .
Reference Designators
Signal Mnemonics
Identification Markings o Printed-Circuit Boards
ADDITIONAL AUTHORIZATION LIST (not applicable)
MAINTENANCE ALLOCATION
EXPENDABLE SUPPLIES AND MATERIALS LIST (not applicable)
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
. . . . . . . . . . . . . . . . . . . .
6-1
6-1
6-1
6-3
6-3
6-4
6-4
6-4
6-4
7-1
7-1
7-1
8-1
8-1
8-1
8-1
8-1
8-1
8-2
8-2
A-1
B-1
D-1
v
Model 5328A
List of Tables
LIST OF TABLES
Table
1-1.
1-2.
1-3.
3-1.
3-2.
3-3.
3-4.
3-5.
3-6.
4-1.
5-1.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
5-8.
5-9.
5-1o.
5-11.
5-12.
5-13.
5-14.
5-15.
5-16.
Page
Equipment Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Accessories Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5328A Counter Specifications
Arming Status . .
Frequency Resolution, N Switch Settings and Gate Times
Functions and Resolution Switch Settings
Addressing . .
Program Code Set
American Standard Code for Information interchange (ASCII) . . . . . . .
5328A input Circuit Program Code Set . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5328A Assembly identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Test Equipment . .
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Performance Test
lC Troubleshooting, A1 Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5328A Functional Signals
Program Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Description . . . . . .
5328A A15 Qualifiers and Signal Mnemonics
A12 Relay Operation . . . .
Relay Control Logic
Program interface Operation
ROM (A10U7) Input/Output Mode
A11 DAC Logic Levels
A11 DAC Signals
A11 DAC Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-44
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. . . . . . . . . . . . 3-9
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1-2
1-3
3-9
3-9
3-14
3-15
3-17
4-15
5-1
5-2
5-4
5-27
5-30
5-33
5-36
5-39
5-41
5-41
5-43
5-43
5-44
5-44
6-1.
6-2.
6-3.
Figure
1-1.
3-1.
3-2.
3-3.
3-4.
3-5.
3-6.
3-7.
3-8.
3-9.
3-10.
3-11.
3-13.
Replaceable Parts
Manufacturers Code List . . . .
Part Number-NSN Cross Reference Index . . . . . . . . . . . . . .
Model 5328A 500 MHz Universal Frequency Counter . . . . . . . . . . . . . . . 1-0
Measuring Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Tone Burst Measurements . . . . .
Deadtime
Multiple STOP Pulses
Monitoring Marker Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
5328A Front Panel Operation Summary . . . . . . . . . . . .
5328A Rear Panel Controls and Connectors
Programmable Input Switch Configuration for COM A
Slope Switch Settings
Level Control Settings . . . . . . . . .
Hysteresis Band
5328A Measurement Cycle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES
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6-5
6-24
6-25
Page
3-2
3-3
3-5
3-7
3-10
3-11
3-11
3-12
3-18
LIST OF FIGURES
Model 5328A
List of Figures
4-1.
4-2.
4-3.
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
4-10.
5-1.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
5-8.
5-8.
5-9.
5-10.
5-10.
5-10.
5-11.
5-11.
5-12.
Basic Elements of the Frequency Counter
Measuring Period . .
Basic Elements of a Time interval Counter . . . . . . . . . . . . . . . . . . . . . . . . . .
Clock Pulses
Synchronizer Operation with Time Interval Averaging
±1 Count Ambiguity
Trigger Error
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Controllable (Programmable) Input Block Diagram
ASM Oscillator Timing Diagram . .
10 MHz Oscillator Frequency Check
DAC Adjustment Equipment Connectors
DAC Adjustment Oscilloscope Readout and Adjustment Locations . .
Hookup for A3 Oscillator Support Adjustment
A3 Jitter Adjustment . . . .
System Configuration
Sample Printout
Hookup for
Hookup for Test Described in Table 5-8B and C . . . . . . . . . . . . . . . . . . . .
Triangular Pulse Observed in Steps 5 and 7, Table 5-8B
Assembly Flowchart (Sheet 1 of 3) . .
Assembly Flowchart (Sheet 2 of 3)
Assembly Flowchart (Sheet 3 of 3) . .
Local Troubleshooting Flowchart (Sheet 1 of 2) . . . . . . . . . . . . . . . . . . . . .
Local Troubleshooting Flowchart (Sheet 2 of 2) . . . . . . . . . . . . . . . . . . . . .
Address Switch Troubleshooting Flowchart
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4-1
4-2
4-3
4-3
4-5
4-5
4-7
4-8
4-14
4-24
5-19
5-22
5-23
5-24
5-25
5-31
5-32
5-36
5-38
5-47
5-49
5-51
5-52
5-53
5-54
8-1.
8-2.
8-3.
8-4.
8-5.
8-6.
8-7.
8-7.
8-8.
8-9.
8-10.
8-11.
8-12.
8-13.
8-14.
8-15.
8-16.
8-17.
8-18.
8-19.
8-20.
8-21.
8-22.
8-23.
8-24.
8-25.
Schematic Diagram Notes . .
5328A Front View
5328A Rear View
5328A Top View
5328A Bottom View
A1 Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A1 Motherboard Schematic and Components (Sheet 1 of 2) . . . . . . . . .
A1 Motherboard Schematic and Components (Sheet 2 of 2)
A2 Power Supply Block Diagram . .
A2 Power Supply Schematic and Components . . . . . . . . . . . . . . . . . . . . . .
A3/A3A1 Oscillator Support Schematic and Components . . . . . . . . . . . . . 8-21
A4 Function Selector Block Diagram
A4 Function Selector Schematic and Components . . . . . . . . . . . . . . . . . .
A8 Channel “C” Block Diagram . . . . . . .
A8 Channel “C” Schematic and Components
A10 Synchronizer Block Diagram
A10 Synchronizer Schematic and Components
A11 Digital-to-Analog Converter Block Diagram . . . . . . . . . . . . . . . . . . . .
A11 Digital-to-Analog Converter Schematic and Components
A12 “A-B” Channel Block Diagram
A12 “A-B” Channel Schematic and Components . . . . . . . . . . . . . . . . . . .
A15 HP-IB Interface Block Diagram
A15 HP-IB Interface Schematic and Components
A16 Display Block Diagram . . . . . . . . . . .
A16 Display Schematic and Components
A19 Switch/Attenuator Schematic and Components
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8-3
8-7
8-7
8-8
8-9
8-11
8-17
8-19
8-18
8-19
8-23
8-25
8-26
8-27
8-28
8-29
8-30
8-31
8-32
8-33
8-35
8-37
8-39
8-41
8-43
vii
Model 5328A
Safety Considerations
GENERAL
This is a Safety Class I instrument. This instrument has been designed and tested according to
IEC Publication 348, “Safety Requirements for Electronic Measuring Apparatus.”
OPERATION
BEFORE APPLYING POWER verify that the power transformer primary is matched to the
available line voltage and the correct fuse is installed (see Section II). 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.
SERVICE
Although this instrument has been designed in accordance with international safety standards,
this manual contains information, cautions, and warnings which must be followed to ensure
safe operation and to retain the instrument in safe condition. Service and adjustments should
be performed only by qualified service personnel.
SAFETY CONSIDERATIONS
Any adjustment, maintenance, and repair of the opened instrument under voltage should be
avoided as much as possible and, when inevitable, should be carried out only by a skilled person
who is aware of the hazard involved.
Capacitors inside the instrument may still be charged even if the instrument has been discon-
nected from its source of supply.
Whenever it is likely that the protection has been impaired, the instrument must be made in-
operative and be secured against any unintended operation.
viii
Safety Considerations
WARNING
IF THIS INSTRUMENT IS TO BE ENERGIZED VIA AN AUTOTRANS-
FORMER (FOR VOLTAGE REDUCTION] MAKE SURE THE COMMON
TERMINAL IS CONNECTED TO THE EARTHED POLE OF THE POWER
SOURCE.
WARNING
BEFORE SWITCHING ON THE INSTRUMENT, THE PROTECTIVE EARTH
TERMINALS OF THE 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 CONTACT. THE PROTECTIVE
ACTION MUST NOT BE NEGATED BY THE USE OF AN EXTENSION
CORD (POWER CABLE) WITHOUT A PROTECTIVE CONDUCTOR
(GROUNDING).
WARNING
Model 5328A
THE SERVICE INFORMATION FOUND IN THIS MANUAL IS OFTEN
USED WITH POWER SUPPLIED AND PROTECTIVE COVERS REMOVED
FROM THE INSTRUMENT. ENERGY AVAILABLE AT MANY POINTS
MAY, IF CONTACTED, RESULT IN PERSONAL INJURY.
CAUTION
BEFORE SWITCHING ON THIS INSTRUMENT:
1.
MAKE SURE THE INSTRUMENT IS SET
THE POWER SOURCE.
2.
ENSURE THAT ALL DEVICES CONNECTED TO THIS INSTRUMENT ARE CONNECTED TO THE PROTECTIVE (EARTH) GROUND.
ENSURE THAT THE LINE POWER (MAINS) PLUG IS CONNEC-
3.
TED TO A THREE-CONDUCTOR LINE POWER OUTLET THAT HAS
A PROTECTIVE (EARTH) GROUND. (GROUNDING ONE CONDUCTOR OF A TWO-CONDUCTOR OUTLET IS NOT SUFFICIENT.)
4.
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 FUSE
HOLDERS MUST BE AVOIDED.
TO THE VOLTAGE OF
ix
Model 5328A
General Information
Figure 1-1. Model 5328A 500 MHz Universal Frequency Counter
0
TM 11-6625-2941-14&P
SECTION O
INTRODUCTION
0-1. SCOPE
This manual describes Counter, Electronic, Digital Readout AN/USM-459 and
provides instructions for operation and maintenance. Throughout this manual,
the AN/USM-459 is referred to as Hewlett-Packard Model 5328A Counter.
0-2.
whether there are new editions,
ing to the equipment.
modification work orders (MWO's) pertaining to the equipment.
0-3.
forms, records,
all maintenance levels are listed in and prescribed by TM 38-750.
DD Form 6 (Packaging Improvement Report) as prescribed in AR 700-58/NAVSUPINST
4030.29/AFR 71-13/MCO P4030.29A and DLAR 4145.8.
ward Discrepancy in Shipment Report (DISREP) (SF 361) as prescribed in AR
55-38/NAVSUPINST 4610.33B/AFR 75-18/MCO P4610.19C and DLAR 4500.15.
0-4.
INDEXES OF PUBLICATIONS
DA Pam 310-4. Refer to the latest issue of DA Pam 310-4 to determine
a.
changes, or additional publications pertain-
DA Pam 310-7.
b.
FORMS AND RECORDS
a. Reports of Maintenance and Unsatisfactory Equipment. Maintenance
and reports which are to be used by maintenance personnel at
Report of Packaging and Handling Deficiencies. Fill out and forward
b.
Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and for-
c.
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)
Refer to DA Pam 310-7 to determine whether there are
EIR’s will be prepared using Standard Form 368 (Quality Deficiency Report).
Instructions for preparing EIR’s are provided in TM 38-750, The Army Maintenance Management System. EIR’s should be mailed direct to Commander, US Army
Communications and Electronics Materiel Readiness Command, ATTN: DRSEL-ME-MQ,
Fort Monmouth, NJ 07703.
0-5.
shall be in accordance with paragraph 2-26.
0-6.
accordance with TM 750-244-2
ADMINISTRATIVE STORAGE
Administrative storage of equipment issued to and used by Army activities
DESTRUCTION OF ARMY ELECTRONICS MATERIEL
Destruction of Army electronics materiel to prevent enemy use shall be in
A reply will be furnished direct to you.
0-1
Model 5320A
General Information
SECTION I
GENERAL INFORMATION
1-1. SCOPE OF MANUAL
1-2. This manual provides operating and service information for the Hewlett-Packard Model
5328A/H42 500 MHz Universal Frequency Counter. (In this manual its name will be abbreviated
to “5328A” or “counter”.) A separate operators booklet contains condensed operator instructions.
1-3. This manual is divided into eight sections as listed and described below:
Section I
GENERAL INFORMATION —
items supplied, lists items required, but not supplied, describes applications,
and lists recommended maintenance and test equipment.
Describes the counter, lists specifications, lists
Section II
Section Ill
Section IV
Section V
Section VI
Section VII
Section Vlll
1-4. DESCRIPTION
1-5. The 5328A counter can be used to measure frequency, period, period average, time
interval, time interval average, and ratio. The 5328A provides a 9-digit LED display, display
storage, and leading zero blanking. Decimal point and unit readouts are displayed automatically.
Two independent selectable input channels are provided for time interval measurements. Each
input channel has an attenuator, trigger slope selector, level control, ac or dc coupling, and an
oscilloscope marker output. Rear panel connectors provide a gate output, one- and 10-megahertz output, and an input for an external frequency standard. An ARM switch on the rear panel
allows arming by the signal being measured (switch OFF) or by another input signal (switch ON).
INSTALLATION —
ation for use, preparation for reshipment, and preparation for storage.
OPERATION —
ment of input signal: time period, time period average, time interval, time
interval average, and ratio between frequencies of two input signals.
THEORY OF OPERATION —
principles of the counter with reference to block and schematic diagrams
of each assembly.
MAINTENANCE — Contains maintenance and service information, including
a list of assemblies, recommended test equipment, performance checks, and
adjustment. Troubleshooting procedures and flowcharts are included in this
section.
REPLACEABLE PARTS —
parts ordering information.
MANUAL CHANGES —
CIRCUIT DIAGRAMS —
cating illustrations.
Provides instructions for unpacking, inspection, prepar-
Provides operator instructions including frequency, measure-
Covers a. description of the general operating
Provides a complete list of replaceable parts and
Contains information on manual changes.
Contains schematic diagrams and component lo-
1-6. INSTRUMENT IDENTIFICATION
1-7. Hewlett-Packard instruments have a 2-section, 10-character serial number (0000A00000),
which is located on the rear panel. The 4-digit serial prefix identifies instrument changes. If
the serial prefix of your instrument differs from that listed on the title page of this manual, there
are differences between this manual and your instrument. Instruments having higher serial
prefixes are covered with a “Manual Changes” sheet included with this manual.
1-1
Model 5328A
General Information
1-8. APPLICATIONS
1-9. Specific applications information is provided in Section III of this manual. The general
application features of the 5328A are described in the following paragraphs.
1-10. The high sensitivity, frequency range, and signal conditioning controls (see Table 7-3)
make the 5328A suited for a wide range of applications.
1-11. The rear panel controlled “ARM” feature of the 5328A is useful in applications such as
burst frequency measurements, and pulse ampltiude measurements.
1-12. The 5328A single-shot resolution of 100 ns meets the requirements for applications
such as mechanical and electromechanical device (relays) timing, time of flight measurements
(ballistics), sonar ranging, radio ranging, and navigation.
1-13. Using time interval averaging, time intervals as short as 100 picosecond, with resolution
to 10 picosecond may be measured. Applications include coaxial cable length measurements,
phase measurements, logic timing measurements, and integrated circuit propagation delay
measurement.
1-14. Full bandwidth, sensitivity, and signal conditioning of the Channel A, B, and C input
amplifiers is provided for ratio and totalizing measurements.
1-15. The 5328A HP-IB Interface is able to output measurement data and be controlled (fully
programmed) via the Hewlett-Packard Interface Bus (HP-16). The 5328A may be interfaced
to HP-IB compatible instruments, calculators, or computers by interconnecting with an HP-IB
cable.
1-16. EQUIPMENT SUPPLIED AND ACCESSORIES AVAILABLE
1-17. Table 7-7 lists equipment supplied with the 5328A and Table 7-2 lists accessories available, The Service Kits listed in Table 1-2 are described in Section III.
Table 1-1. Equipment Supplied
DESCRIPTION
Detachable Power Cord 231 cm (71/2 ft.) long
Extender Board, 18 pin
Table 1-2. Accessories Available
DESCRIPTION HP PART NUMBER
HP Interface Bus Interconnect Cable 10631A, 914 mm (3 ft. long)
Front Handle Kit
Rack Flange Kit (for instruments without handles)
Rack and Handle Kit (installation instructions included
with above kits)
Service Kit:
Function Selector and ROM Kit
HP PART NUMBER
8120-1348
05328-62016
10631B, 1828 mm (6 ft. long)
10631C, 3656 mm (12 ft. long)
10631D, 0.5 m (11/2 ft. long)
5061-0088
5061-0076
5061-0082
05328-82004
1-2
1-18. SPECIFICATIONS
1-19. Table 1-3 lists detailed specifications for the 5328AF/096.
Table 1-3. 5328A Counter Specifications
Model 5328A
General Information
Power Requirements:
400 Hz ac.
Display:
Sample Rate:
seconds to HOLD.
Arming:
Refer to operation for details.
Blanking:
significant-digit are suppressed.
Hold:
HOLDS count between samples.
Trigger Light:
level.
PROGRAMMABLE OPERATION
Includes independent selection of coupling,
trigger slope, trigger level, and attenuator for
each channel. Separate/Common A switch is
programmable. Also, an invert feature switches
Channels A and B; useful in all functions except
Ratio B/A.
Trigger level is programmable in 10 mV steps
in X1; 100 mV in X10; IV in X100.
Trigger level accuracy under remote control:
X1:
±35 mV
X10:
±350 mV +2% of trigger level
X100:
±3.5V +2% of trigger level
Input Characteristics
Sensitivity:
20 Hz—35 MHz (ac coupled)
50 mV rms, 35 MHz—100 MHz
Minimum pulse width 5 ns, 140 mV p-p.
Coupling:
Impedance: 1 MO
Trigger Level:
attenuator setting with 0 volt preset position.
Trigger Slope:
- slope.
Attenuators:
Dynamic Range:
attenuator setting, 0—35 MHz; 50 mV rms
times attenuator setting, 35 MHz to 100 MHz
Maximum Input:
dc coupled, X1:
1.25 x 107V rms/freq., 50 kHz—2.5 MHz
5V rms, 2.5 MHz—100 MHz.
dc coupled, X10 and X100:
MHz 1.25 x 109V rms/freq., 5—100 MHz
ac coupled:
0-20 Hz; same as dc coupled above 20 Hz.
Channel Input:
Marker Outputs:
trigger outputs available on front panel;
0 to 300 mV levels into
Frequency Measurements
Frequency A
Range:
Resolution:
Accuracy:
Display: Hz, kHz, MHz.
GENERAL
Nine-digit LED.
Variable from less than 2 milli-
Rear panel ARM (ON-OFF) switch.
Unwanted zeros to left of most-
Indicates input is above trigger
(CHANNELS A AND B)
15 mV rms, 0—35 MHz (decoupled
ac or dc switch selectable.
X1, X10, X100.
0—100 MHz direct count.
1 MHz to 0.1 Hz in decade steps.
±1 count ± time base error.
115 or 230 volts 60 or
II <70 pF.
Variable over ±2.5 volts times
Independent selection of + or
25 mV to 1V rms times
250V rms, dc — SO kHz
250V rms, dc 5
200V (peak ac + dc),
Separate or Common A.
A and B channel Schmidt
50Q;
<20 ns delay.
Period Measurements
Time Interval Measurements
Ratio Measurement
Period A
Range:
Resolution:
Accuracy:
Display:
Period Average A
Range:
Resolution:
Accuracy:
error
Display:
Time Interval A to B
Range:
Resolution:
Accuracy:
Display:
Time Interval Average A to B
Range:
Resolution:
Accuracy:
Minimum Dead Time:
Maximum Repetition Rate:
Display:
Ratio B/A, or C/A
Range:
Range:
Range:
Resolution:
Accuracy: ±1 count of B or C ± trigger
* Trigger error is <0.3% of one period for sine waves
of 40 dB S/N or better and amplitude equal to
sensitivity of counter. For any wave shape, trigger
error is than then:
0—10 MHz
10 ns to 0.1s in decade steps.
±trigger error*
steps.
± trigger error*
STOP to next START
error* of A times frequency of B or C (N>1)
For N=1, add 12 ns times frequency of
B or C.
±1 count ± time base error
ns,
ps,
ms.
0—10 MHz
100 ns—.01 ps in decade steps.
±1 count displayed ± time base
trigger error*
±
no. of periods averaged
Ps,
ns
100 ns to 108 seconds
100 ns to 1-second in decade
±1 count ± time base error
ps,
ms, s.
0.1 ns to 10 seconds
150 ns from one
Ps,
ns.
A: 0—10 MHz
B: 0—100 MHz
C: 30—500 MHz
1 part in ~ x N
10 MHz.
1-3
Model 5328A
General Information
Table 7-3. 5328A Counter Specifications (Continued)
CHANNEL C
Input Characteristics
Range:
Sensitivity:
Trigger level:
Impedance:
Maximum Input:
Input protection:
overload Indicator:
Resolution:
Accuracy:
Display: Hz, kHz, MHz
30 MHz to 500 MHz direct count
15 mV rms, 30 MHz—500 MHz
0 volts
50fl
nominal
5 volts rms
from front panel. protected to 200 volts peak.
of potential overload conditions.
Input BNC fused; accessible
flashing indicator warns
1 MHz to 0.1 Hz in decade steps
±1 count ± time base error
TIME BASE
Outputs:
Output level:
External Input:
Oscillator Aging Rate:
1 MHz and 10 MHz available at rear
panel BNC in standby and operate modes
1 volts rms into
Operates from 1, 2.5, 5, and 10
MHz inputs at 1V rms.
Input impedance 1
Counter automatically switches to
external mode when external input is
present.
24-hour warmup. Oscillator oven is
energized when power cable is connected
to line voltage.
50f)
K~l<30
pF
<5x1010/day after
1-4
Model 5328A
Installation
SECTION II
INSTALLATION
2-1. INTRODUCTION
2-2. This section provides instructions for unpacking, inspection, preparation for use, shipment, and storage.
2-3. UNPACKING AND INSPECTION
2-4. If the shipping carton is damaged, inspect the counter for visible damage (scratches,
dents, etc.). If the counter is damaged, notify the carrier and the nearest Hewlett-Packard
Sales and Service Office immediately (offices are listed at the back of this manual). Keep the ship-
ping carton and packing material for the carrier’s inspection.
2-5. PREPARATION FOR USE
CAUTION
Before connecting this instrument to an ac power line, be sure that
the 115—230-volt line selector switch on the rear panel is set to the
proper position and proper line fuse is installed (see below).
2-6. Power Requirements
2-7. This instrument can be operated on single phase 115 or 230 (-10%. +5%) volts ac. Power
required is approximately 100 VA maximum. To avoid instrument damage, the rear panel line
selector switch must be set to the correct position and the correct fuse (as labeled on the rear
panel) must be installed. See Section
III for rear panel features photograph. When shipped, the
switch is set to 115-volt ac operation.
2-8. Fuse Replacement and Installation
2-9. Two fuses are supplied with the instrument. The instrument is shipped with a 2.0 ampere
fuse installed for 115- volt operation. To change the instrument for 230-volt operation disconnect the ac power cable, set the line selector switch and install the 1.0 ampere fuse.
2-10. Power Cables
WARNING
TO PROTECT OPERATING AND SERVICING PERSONNEL, THIS
INSTRUMENT IS EQUIPPED WITH A THREE-PIN POWER RECEP-
TACLE. THE CENTER PIN OF THE RECEPTACLE CONNECTS THE
INSTRUMENT CHASSIS AND PANELS TO EARTH GROUND WHEN
USED WITH A PROPERLY WIRED THREE CONDUCTOR OUTLET
AND POWER CABLE. IMPROPERLY GROUNDED EQUIPMENT CAN
RESULT IN HAZARDOUS POTENTIALS BETWEEN EQUIPMENTS.
2-1
Model 5328A
Installation
2-11. To accommodate the different power receptacles used throughout the world, this instrument is supplied with one of the power cables shown in Figure 2-7. The cable supplied for use
in the United States meets the specifications established by the International Electrotechnical
Commission (lEC). The male connector of this cable is a NEMA type and the female connector
is a C.E.E. type.
2-12. Connect the power cable to a power source receptacle that has a grounded third con-
ductor. If the line power receptacle is a two-pin type instead of a three-pin receptacle, use a
two- to three-pin adapter (HP Part No. 1251-0048 for USA applications) and connect the green
lead on the adapter to earth ground. See warning above. If counter is to be operated with 230V ac
line power, an Underwriters Laboratories listed connector should be used to connect power.
2-13. Operating Environment
2-14. Maximum and minimum allowable operating temperatures are listed in Table 1-3. If
these limits are exceeded at the installation site, auxiliary cooling or heating should be used to
keep the environment within limits. A l-inch space above the counter should be clear to allow
cooling air circulation. The cooling fan exhaust port at rear is to be kept clear.
2-15. Bench Operation
2-16. The instrument cabinet has plastic feet and the large tilt carrying handle will fold under
for convenient bench operation. The tilt handle permits inclining the instrument for ease in
using front-panel controls and indicators.
NOTE
The tilt carrying handle may be secured in any position by tightening
the knurled side screws.
2-17. Rack Mounting
2-18. The counter is ready for bench operation as shipped from the factory. To mount the
counter in a rack, it is necessary to order and install the rack flange kit listed in Table 7-2.
CAUTION
Ambient temperature in rack during operation should not exceed 112°F
(50°C). Be sure instrument position in rack permits adequate air circulation and that nearby equipment does not discharge hot air directly on
the instrument.
2-19. PACKAGING FOR RESHIPMENT
2-20. Original Packaging
2-21. The same containers and materials used in factory packaging can be obtained through
the Hewlett-Packard Sales and Service Offices listed at the rear of this manual.
2-22. If the counter is being returned to Hewlett-Packard for service, attach a tag indicating
the type of service required, return address, model number, and full serial number. Mark the
container FRAGILE to assure careful handling.
2-2
2-23. In any correspondence refer to the counter by model number and full serial number.
Model 5328A
Installation
2-24. Other Packaging Methods
2-25. If factory packaging is not available, good commercial packing should be used. Contract
packaging companies in many cities can provide dependable custom packaging on short notice.
The following general instructions should be followed when repackaging with commercially
available materials.
a.
If shipping to a Hewlett-Packard Service Office or Service Center, attach a tag indi-
cating the type of service required, return address, model number, and full serial number.
b. Wrap the counter in heavy paper or plastic.
c.
Use a strong shipping container. A double-wall carton made of 350-pound test material
is normally adequate for shipments inside the U.S.
d. Use enough shock-absorbing material (3-to 4-inch layer) around all sides of the counter
to provide a firm cushion and prevent movement inside the container. Protect the con-
trol panel with cardboard.
e.
Seal the shipping container securely.
2-26. STORAGE
2-27. If the counter is to be stored for an extended period of time, it should be enclosed in a
clean, dry, sealed container. See specifications in Section I for storage environmental limitations.
2-3
Model 5328A
SECTION Ill
OPERATION
(OPERATORS INSTRUCTIONS)
3-1. INTRODUCTION
3-2. This section contains information necessary to understand how to control and use the
counter. Specific details and examples are provided for making measurements of frequency,
period, period average, time interval and time interval average, and ratio. How to use the external frequency standard input is described. Programming information for use with the HP-IB
Interface and the Programmable Input Module is provided. Front and rear panel controls, connectors, and indicators are described.
3-3. FREQUENCY MEASUREMENTS
3-4. To make a frequency measurement on a CW signal below 100 MHz, select FREQ A function, select the appropriate input signal conditioning, and apply the signal to A input. The
RESOLUTION switch determines the resolution of the measurement. Since the 5328A is a conventional counter, 1 Hz resolution is obtained in 1-second of measurement time (e.g., .1Hz
10 seconds). The .1 Hz best case frequency resolution limits the low frequency measurement
accuracy. In practice, low frequencies are measured by making a period or period average
measurement and inverting the result to obtain frequency.
Operation
3-5. To make a frequency measurement on a CW signal in the range of 30 to 500 MHz, select
FREQ C function and apply the signal to the Channel C input. Make sure that the amplitude
does not exceed 5V rms. The trigger level for the Channel C is fixed at 0V dc. If pulse waveforms are being measured, they must cross through 0 volts dc by at least 25 mV. Pulse widths
down to 1 ns can be counted.
CAUTION
DO NOT exceed 5 volts rms at “C” channel input. Circuits in this
channel may be damaged by higher voltages.
3-6. The A, B, and C input modules are direct count modules. Direct count allows greater resolution per-second of measurement time than prescaling techniques and is important in making
frequency measurements on pulse bursts since the allowable measurement time is fixed (it
must be less than the width of the burst).
3-7. When the 5328A is in FREQ A or FREQ C function and the rear panel ARM switch is OFF,
a measurement cycle is initiated (i.e., arms the counter) upon the first trigger level crossing at
the A (or C) input. This means that pulsed signals are measured as easily as CW if the measurement time (determined by the RESOLUTION switch) is less than the width of the pulse.
3-8. With the ARM switch ON, FREQ A and FREQ C are armed by a trigger event at the B input. This mode is useful whenever it is desired to have real time control over when a measurement is to begin. Useful applications include measuring frequency variations along a frequency
burst and linearity testing of sweep generators. Figure 3-7 illustrates the setup for measuring
the linearity of a sweep generator. The Channel B Trigger level is adjusted to trigger (and thereby arm the counter) at various points along the sweep out waveform. By plotting the B trigger
levels and the corresponding frequency measurements made at those levels, the linearity of the
generator may be determined.
3-1
Model 5328A
Operation
3-9. PERIOD MEASUREMENTS
3-10. The PERIOD and PERIOD AVG functions allow single period measurement or multiple
period averages to be made on input signals into Channel A for frequencies up to 10 MHz. These
modes are useful for making low frequency measurements where maximum resolution is
desired.
Figure 3-1. Measuring Linearity
3-11. To make a PERIOD or PERIOD AVG measurement, select the desired function, select
appropriate input signal conditioning, and apply the signal to the A input. For single period
measurements, the RESOLUTION switch scales the time base frequency which determines the
resolution of the measurement. For optimum resolution, select N=1. Other N values may be
desirable to prevent display overflow or to get rid of unstable digits. For PERIOD AVG measurements, the RESOLUTION switch selects the number of periods over which the period average
measurement is made (the time base is 10 MHz for this case). the PERIOD AVG mode gives
increased resolution and accuracy. Trigger error is decreased by N and the resolution is in-
creased by N (resolution =
3-12. In PERIOD and PERIOD AVG with the rear panel ARM switch OFF, the measurement
cycle is initiated by the SAMPLE RATE control and the input signal. With the ARM switch ON,
PERIOD and PERIOD AVG are armed by a trigger event at the B input. To measure the frequency of a tone burst signal, use arming and the PERIOD AVG (for increased resolution over
a low frequency measurement) as shown in Figure 3-2. Select N equal to or less than the
number of periods in the tone burst and adjust Channel B trigger level to trigger on the first
cycle of the input signal.
~.
The measurement time is equal to the period times N.
3-2
Figure 3-2. Tone Burst Measurement
Model 5328A
Operation
3-13. TIME INTERVAL MEASUREMENTS
3-14. One of two time interval functions can be selected, time interval or time interval average.
These functions measure the time interval between a START signal at the Channel A input and
STOP signal at the Channel B input. If both the START and the STOP signals are derived from
the same signal, place the COM A-SEP in COM A position. Separate slope and level controls
for each channel allow variable triggering on either positive or negative going slope.
3–15. In single-shot time interval measurements, Channel A opens the main gate and Channel
B closes the main gate. While the main gate is open, 10 MHz is divided by the setting of the
RESOLUTION switch and totalized by the counter. For optimum resolution, select N=1. Other N
values may be chosen to prevent display overflow (e.g., long time intervals) or to get rid of
unstable digits. In time interval average measurements, the main gate is open for the number
of time intervals selected by the RESOLUTION switch. The 5328A 10 MHz clock is totalized only
during the individual time intervals. The resolution of the measurement is improved by the
3-16. In order to allow the synchronizers time to reset during time interval averaging, there
must be at least 40 ns deadtime (and the additional constraint that the repetition rate be less
than 10 MHz). Deadtime is the time between the preceding time interval stop event and the
current time interval start event as shown in Figure 3-3.
fi.
Figure 3-3. Deadtime
3-17. During a time interval average, there must be only one stop pulse for each start pulse.
Extraneous stop pulses which occur before the next start pulse are accumulated and give erroneous readings. For example, the case illustrated in Figure 3-4 would result in a reading equal
to one-half of the desired time interval.
Figure 3-4. Multiple STOP Pukes
3-3
Model 5328A
Operation
3–18. To set up a time interval measurement, the marker outputs may be monitored on an
oscilloscope (see Figure 3-5) to indicate where the channels are triggering with relation to the time
interval of interest. The GATE/MARKER OUT is high during the time interval being measured.
Figure 3-5. Monitoring Marker Outputs
A-B
3–19. In T.I.
by the run down of the SAMPLE RATE control. With the rear panel ARM switch ON, T.I.
and T.I. AVG
signal is required per average measurement (i.e., the counter doesn’t need to be armed prior
to each individual time interval in the time interval measurement).
3-20. RATIO MEASUREMENTS
3-21. For ratio measurements, the 5328A has wide bandwidth, good sensitivity, and complete
signal conditioning of the Channel A, B, and C input amplifiers.
3–22. Two ratio functions are available: B/A and C/A. The ratio of the frequency at B (or C)
to the frequency at A is measured for N counts of A where N is selected by the RESOLUTION
switch. The resolution of the measurement improves with increasing N and is given by 1 part
in B/A x N (or C/A x N). Since the range of A is 0-10 MHz while B is 0-100 MHz, the lower
frequency is normally applied to the A input although there is no restriction that this be the
case (i.e., ratios less than 1 may be measured). If B/A is greater than 1, the measurement reso-
lution is better than switching the inputs for a ratio <1, provided the value of N remains the same.
3-23. OPERATING CONTROLS
and T.I. AVG
A-B
are armed by an event at the C input. For T.I. AVG
A-B
with the rear panel ARM switch OFF, the counter is armed
A-B,
only one arming
A-B
3-4
3–24. All of the front and rear panel operating controls are shown and described in Figures
3-6 and 3-7.
Model 5328A
Operation
1.
LINE switch0.In STBY position with light on, supplies power to oven of the high stability
time base to maintain a constant temperature for the crystal. In OPER position, supplies normal
operating power to the instrument.
2.
RESET
lights all segments of the LED display and all annunciator LED’s for LED test. Returns 5328A
to LOCAL CONTROL when HP-IB Interface is in use.
3.
FUNCTION
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
button~.
FREQ A. Sets counter to measure frequency at Channel A.
FREQ C. Sets counter to measure the frequency of the signal at the Channel C input.
PER A. Sets counter to measure period at Channel A.
PER AVG A. Sets counter to make a period average measurement of the signal at Chan-
nel A. The number of periods over which the average measurement is made is determined by N, selected by the RESOLUTION switch.
T.I. AVG
interval from A to B. The number of time intervals over which the average measurement
is made is determined by N, selected by the RESOLUTION switch.
T.I.
A-B.
Channel A and the stop signal is applied to Channel B.
CHECK. Applies 10 MHz to decade counting assemblies. Verifies operation of SAMPLE
RATE control, RESOLUTION switch, and RESET.
RATIO C/A. Sets counter to measure the ratio of the signal frequency at Channel C to
the signal frequency at Channel A.
RATlO B/A. Sets counter to measure the ratio of the frequency at Channel B to the fre-
quency at Channel A.
Top blank position has no function.
Resets display and internal count to zero. When continuously depressed,
selector~.
A-B.
Sets counter to make a time interval measurement. Start signal is applied to
Selects mode of operation.
Sets counter to make a time interval average measurement of the time
Figure 3-6. 5328A Front Panel Operation Summary
3-5
Model 5328A
Operation
3-6
Figure 3-6. 5328A Front Panel Operation Summary (Continued)
Model 5328A
Operation
Figure 3-7. 5328A Rear Panel Controls and Connectors
3-7
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