HP 10811A Instruction and safety manual

Model 10811A/B
Errata
Title & Document Type: 10811A/B Quartz Crystal Oscillator Operating &
Service Manual
Manual Part Number: 10811-90002
Serial Prefixes: 2028
Revision Date: August 1980
HP References in this Manual
This manual may contain references to HP or Hewlett-Packard. Please note that
Hewlett-Packard's former test and measurement, semiconductor products and chemical
analysis businesses are now part of Agilent Technologies.
Changes to this Manual
No changes have been made to this manual, with the exception of correcting the odd
spelling and grammatical errors. In some places original photographs may be replaced
or augmented with modern digital photographs. (it’s weird looking at an old BW HP
manual and seeing a color photograph… still gets me)
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8½x11 page. If you wish to print on 11x17 or larger just print the page and scale to fit.
About this Manual
This manual is reproduced from scans of an original document, which is then converted
using my own custom designed OCR software, and then edited in Microsoft®Word 2003.
This means that what you see here is not a scan of a scan/copy with text overlays.
OCR errors may exist and as such the user of this document should take care and use
common sense when referencing this documentation.
Copyright Notice
This documentation is © Copyright 1980 Hewlett Packard and © Copyright 2006, Jack
Hudler, [email protected].
Permission to use and redistribute this documentation for non-commercial and internal
corporate purposes is hereby granted, free of charge.
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documentation is included in the sale, you must state that is for “Free”.
Meaning if you want to gratuitously toss in a copy of the manual on an eBay sale, it’s ok
with me as long as you state it’s for free. No you can’t sell a digital archive of manuals
and say it includes a free copy of this documentation. You must give it away with
equipment.
I think you get the spirit of the copyright; it takes a lot of hours to scan and replicate a
manual. I just want this used in the spirit in which is it given.
Agilent if you have questions or wish to include this in your archive, please email me.

Model 10811A/B
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Model 10811A/B

Model 10811A/B
10811A/B
QUARTZ CRYSTAL OSCILLATOR
OPERATING AND SERVICE MANUAL
SERIAL PREFIX: 2028
This manual applies to Hewlett-Packard Model 10811
A/B Oscillators with serial prefix number 2028.
Also covers oscillators with HP Part Numbers 10811-
60101 and 10811-60105.
OTHER SERIAL PREFIXES
For serial prefixes above 2028, a "Manual Change"
sheet is included with this manual.
First Edition - August 1980
©Copyright 1980
by
HEWLETT-PACKARD COMPANY
5301 Stevens Creek Blvd.
Santa Clara, CA 95050
All Rights Reserved
MANUAL PART NUMBER 10811-90002 Microfiche Part Number 10811-90003

Model 10811A/B
TABLE OF CONTENTS
I. GENERAL INFORMATION ..................................................................................2
1-1. INTRODUCTION....................................................................................................2
1-4. SPECIFICATIONS .................................................................................................2
1-6. SAFETY CONSIDERATIONS................................................................................2
1-8. INSTRUMENTS COVERED BY THIS MANUAL...................................................2
1-13. DESCRIPTION.......................................................................................................4
1-19. HP Part Number 10811-60101 and 10811-60105 ..........................................4
1-22. RECOMMENDED TEST EQUIPMENT .................................................................4
II. INSTALLATION..................................................................................................6
2-1. INTRODUCTION....................................................................................................6
2-3. INITIAL INSPECTION............................................................................................6
2-5. PREPARATION FOR USE ....................................................................................6
2-6. Power Requirements.......................................................................................6
2-10. Single Source Regulated Power Supply .........................................................7
2-12. ELECTRONIC FREQUENCY CONTROL (EFC)...................................................7
2-16. 10 MHz FREQUENCY OUTPUT SIGNAL ......................................................7
2-18. OVEN MONITOR OUTPUT ...................................................................................8
2-20. MATING CONNECTORS AND MOUNTING .........................................................8
2-23. INSTALLATION INSTRUCTIONS...................................................................9
2-25. INSTALLATION INSTRUCTIONS (HP INSTRUMENT) ......................................10
2-28. OPERATING ENVIRONMENT ............................................................................10
2-34. STORAGE AND SHIPMENT ...............................................................................11
2-35. Environment ..................................................................................................11
2-37. PACKAGING........................................................................................................11
2-38. Original Packaging ........................................................................................11
2-40. Other Packaging............................................................................................11
III. OPERATION ....................................................................................................12
3-1. INTRODUCTION..................................................................................................12
3-3. BASIC POWER-UP DESCRIPTION....................................................................12
3-7. FREQUENCY ADJUSTMENT .............................................................................12
3-9. FREQUENCY ADJUSTMENT PROCEDURE ..................................................... 12
3-10. ACCURACY VS ADJUSTMENT INTERVAL .......................................................13
IV. OPERATIONAL VERIFICATION ........................................................................16
4-1. INTRODUCTION..................................................................................................16
4-3. OPERATIONAL VERIFICATION .........................................................................16
4-5. EQUIPMENT REQUIRED....................................................................................16
4-7. TEST RECORD ...................................................................................................16
4-13. OPTIONAL CONTROLLERS AND COUNTERS.................................................21
4-14. Optional Controllers.......................................................................................21
4-16. Optional Counters..........................................................................................22
V. ADJUSTMENTS ...............................................................................................25
5-1. INTRODUCTION..................................................................................................25
5-3. EQUIPMENT REQUIRED....................................................................................25
5-5. FACTORY SELECTED COMPONENTS.............................................................25
5-7. ADJUSTMENT LOCATION .................................................................................25
5-9. SAFETY CONSIDERATIONS..............................................................................25
5-11. OSCILLATOR FREQUENCY ADJUSTMENT .....................................................25
5-13. Offset Calculation: .........................................................................................26
5-14. OUTPUT AMPLITUDE ADJUSTMENT ...............................................................27

Model 10811A/B
VI. REPLACEABLE PARTS.................................................................................... 29
6-1. INTRODUCTION..................................................................................................29
6-3. ORDERING INFORMATION ...............................................................................29
6-5. HP PART NUMBER ORGANIZATION ................................................................29
6-7. Component Parts and Materials ..........................................................................30
6-10. GENERAL USAGE PARTS .................................................................................31
6-12. Specific Instrument Parts .....................................................................................31
6-14. Factory Selected Parts.........................................................................................31
6-20. REPLACEABLE PARTS LIST LAYOUT..............................................................31
VII.MANUAL CHANGES........................................................................................ 37
7-1. INTRODUCTION..................................................................................................37
7-3. MANUAL CHANGES ...........................................................................................37
7-5. NEWER INSTRUMENTS.....................................................................................37
VIII. SERVICE.................................................................................................... 39
8-1. INTRODUCTION..................................................................................................39
8-3. SCHEMATIC DIAGRAM SYMBOLS AND REFERENCE DESIGNATORS ........39
8-5. REFERENCE DESIGNATORS............................................................................39
8-6. Theory of Operation.......................................................................................39
8-8. OVERALL BLOCK DIAGRAM THEORY .............................................................39
8-13. MAIN OSCILLATOR THEORY OF OPERATION................................................42
8-18. ELECTRONIC FREQUENCY CONTROL (EFC).................................................43
8-20. AUTOMATIC GAIN CONTROL (AGC) ................................................................44
8-23. RF OUTPUT IMPEDANCE MATCHING AND OUTPUT BUFFER......................45
8-25. VOLT AGE REFERENCES (5.7V AND 6.4V) .....................................................45
8-27. OVEN HEATER AND CONTROLLER THEORY.................................................46
8-35. PRECISION VOLTAGE REFERENCE................................................................47
8-37. OVEN CONTROLLER TURN-ON CURRENT LIMITING ....................................47
8-39. HEATER TRANSISTOR BALANCE ....................................................................48
8-41. REPAIR AND TROUBLESHOOTING..................................................................49
8-42. Inspection ......................................................................................................49
8-44. REPAIR................................................................................................................49
8-45. Printed Circuit Component Replacement......................................................49
8-47. Replacing Integrated Circuits ........................................................................49
8-50. TROUBLESHOOTING.........................................................................................50
8-57. DISASSEMBLY FOR TROUBLESHOOTING AND REPAIR...............................51
8-61. SPECIAL TEST CONNECTOR FOR 10811A .....................................................52
8-65. SPECIAL CABLE FOR THE 10811 B..................................................................53
8-67. SPECIAL PARTS REPLACEMENT CONSIDERATIONS ...................................53
8-69. OVEN CONTROLLER TROUBLESHOOTING....................................................55
8-70. General..........................................................................................................55
8-74. Normal Operation ..........................................................................................56
8-76. TROUBLESHOOTING.........................................................................................56
8-80. Troubleshooting Cautions..............................................................................56
8-82. Flex Damage .................................................................................................56
8-84. OSCILLATOR TROUBLESHOOTING.................................................................58
8-86. NORMAL OPERATION .......................................................................................58
8-88. OSCILLATOR TROUBLESHOOTING TECHNIQUES ........................................58
8-92. TROUBLESHOOTING INFORMATION...............................................................59

Model 10811A/B
LIST OF TABLES
Table 1-1. Specifications Table ..............................................................................................................3
Table 1-2. Recommended Test Equipment ...........................................................................................5
Table 2-1. Input Voltages/Voltage Coefficients ......................................................................................6
Table 3-1. Accuracy vs Adjustment......................................................................................................14
Table 4-1. Operational Verification Descriptions.................................................................................. 17
Table 4-2. Operation Verification Procedure ........................................................................................18
Table 4-3. 5316A Program Codes........................................................................................................22
Table 4-4. Operational Verification Record ..........................................................................................24
Table 6-1. Replaceable Parts ...............................................................................................................32
Table 6-1. Replaceable Parts (Continued) ...........................................................................................34
Table 6-2. Manufacturers Code List .....................................................................................................35
Table 8-1. Temperature Set Resistor List. ............................................................................................54
Table 8-2. Oven Controller Troubleshooting Tree................................................................................ 57
Table 8-3. Oven Circuit Voltages·.........................................................................................................61
Table 8-4. Oscillator Section Normal Voltages (see Notes 1, 2, 3)......................................................61
LIST OF FIGURES
Figure 1-1. 10811A and 108118 Oscillators ...........................................................................................1
Figure 2-1. Single Source Regulated Power Supply.............................................................................. 7
Figure 2-3. 10811A Supply and Output Connections ............................................................................8
Figure 2-4. 10811B Supply and Output Connections............................................................................ 9
Figure 2-5. Mechanical Mounting Dimensions.....................................................................................10
Figure 3-1. Oscillator Adjustment Set-Up.............................................................................................13
Figure 4-1. BASIC Program.................................................................................................................. 21
Figure 4-2. HPL Program......................................................................................................................21
Figure 5-1. Oscillator Adjustment Setup ..............................................................................................26
Figure 5-2. 10811A Amplitude Adjustment Set-up...............................................................................27
Figure 5-3. 108118 Amplitude Adj Set-up ............................................................................................28
Figure 8-1. Schematic Diagram Notes .................................................................................................40
Figure 8-2. 10811A/B Overall Block Diagram....................................................................................... 41
Figure 8-3A. Basic Colpitts- Type Oscillator......................................................................................... 42
Figure 8-3B. Main Oscillator Schematic Design...................................................................................42
Figure 8-4. Mode Suppression.............................................................................................................43
Figure 8-5. Frequency Tuning Circuit...................................................................................................43
Figure 8-6. EFC ....................................................................................................................................44
Figure 8-7. Automatic Gain Control (AGC)...........................................................................................44
Figure 8-8. Output Amplifiers ...............................................................................................................45
Figure 8-9. Voltage References............................................................................................................46
Figure 8-10. Oven Control Circuits.......................................................................................................47
Figure 8-11. Turn-on Current Limit Circuit............................................................................................ 48
Figure 8-12. Heater Transistor Balance Circuit. ...................................................................................48
Figure 8-13. 10811A/B Special Test Connector...................................................................................52
Figure 8-14. Oven Controller Block Diagram .......................................................................................55
Figure 8-15. Oven Controller Schematic Diagram ...............................................................................64

Model 10811A/B
PREFACE
This manual is designed to present the information required by the user to effectively operate and
maintain the 10811A/B Quartz Crystal Oscillator.
In limiting the depth of coverage of this manual, a certain amount of previous knowledge on the part of the
reader must be assumed. A variety of additional related documentation is available. These materials
address the specific areas of interest, and should be used whenever necessary to supplement this
manual. Users unfamiliar with precision time keeping and frequency standards, for example, may wish to
refer to the 10811A/B Documentation Map for further information.
The following references can provide additional information about the theory and use of precision
frequency sources and quartz oscillators.
1. Application Note 52-1 Hewlett-Packard Fundamentals of Time and Frequency Standards.
2. Application Note 52-2 Hewlett-Packard Time Keeping and Frequency Calibration.
3. Application Note 200-2 Hewlett-Packard Fundamentals of Quartz Oscillators.
4. U.S. National Bureau of Standards, Monograph 140, Time and Frequency Theory and
Fundamentals available from:
Superintendent of Documents
U. S. Government Printing Office
Washington, D.C. 20402
5. In 1990 the NIST replaced the Monograph 140 document with this interim collection of
documents NIST/TN1-339 or visit time NIST Time and Frequency Publication Database.
The 10811A/B Quartz Crystal Oscillator has two manuals available. The Operating Instruction
Manual is supplied with the oscillator and is intended for the user that desires only operating
information. The Operating and Service Manual is a complete document containing both
operating and servicing information. The Operating and Service Manual (This manual) is not
supplied with the oscillator, but is available by ordering HP Part No. 10811-90002 (of course
they won’t sell you one). The Operating Instructions Manual is a duplication of Sections I, II,
and III of the Operating and Service Manual. Any references in the Operating Instructions
Manual to Sections IV, V, VI, VII, and VIII should be considered references to the Operating
and Service Manual.
10811A/B Documentation Map

Model 10811A/B
1
Figure 1-1. 10811A and 108118 Oscillators

Model 10811A/B
2
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 10811A/B Quartz Crystal Oscillator. Figure 1-1 shows the 10811A
and 10811B.
1-3. This manual is divided into eight sections, each covering a particular topic. The topics by section
number are shown below. Sections I, II, III appear in the Operating Instructions Manual. Sections
I through VIII appear in the Operating and Service Manual.
Section Topic
I General Information
II Installation
III Operation
IV Performance Tests
V Adjustments
VI Replaceable Parts
VII Manual Changes
VIII Service
1-4. SPECIFICATIONS
1-5. Specifications are listed in Table 1-1. These specifications are the performance standards or
limits against which the oscillator may be tested.
1-6. SAFETY CONSIDERATIONS
1-7. The Model 10811A/B Component Oscillator is a Safety Class III product and must be powered
from a source which is electrically isolated from the mains (line circuits). Safety information
pertinent to the operation and servicing of this instrument is included in the appropriate sections
of this manual.
1-8. INSTRUMENTS COVERED BY THIS MANUAL
1-9. Attached to the instrument is a serial number plate. The serial number is in the form 0000A00000.
It is in two parts; the first four digits and the letter are the serial prefix and the last five are the
suffix. The prefix is the same for all identical instruments; it changes only when a change is made
to the instrument. The suffix, however, is assigned sequentially and is different for each
instrument. The contents of this manual apply to instruments with the serial number prefix(es)
listed under Serial Prefix on the title page.
1-10. An instrument manufactured after the printing of this manual may have a serial number prefix that
is not listed on the title page. This unlisted serial number prefix indicates the instrument is
different than those described in this manual. The manual for this new instrument is accompanied
by a yellow Manual Changes supplement. This supplement contains "change information" that
explains how to adapt the manual to the newer instrument.
1-11. 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, Hewlett Packard
recommends that you periodically request the latest Manual Changes supplement. The
supplement for this manual is identified with the manual print date and part number, both of which
appear on the manual title page. Complimentary copies of the supplement are available from
Hewlett-Packard.