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Manuals and User Guides for Symmetricom SA.22c. We have
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Symmetricom SA.22c manual available for free PDF download: User Manual
Symmetricom SA.22c User Manual (82 pages)
Rubidium Oscillator
Brand:
Symmetricom
| Category:
Laboratory Equipment
| Size: 4 MB
Table of Contents
Warranty
4
Table of Contents
6
How to Use this Guide
14
Purpose of this Guide
15
Structure of this Guide
15
Who Should Read this Guide
15
Conventions Used in this Guide
16
Warnings, Cautions, Recommendations, and Notes
17
Related Documents and Information
18
What's New in this Guide
18
Where to Find Answers to Product and Document Questions
18
Chapter 1 Description
20
In this Chapter
20
Description Overview
21
Typical Applications
21
Sa.22C Rubidium Oscillator
21
Sa.22C Rubidium Oscillator Simplified Block Diagram
22
Chapter 1 Description Specifications
23
Specifications
23
Sa.22C Dimensions
23
SA-22C Pin Assignment and Function Chart
24
Sa.22C Design Absolute Maximum Ratings
25
Sa.22C Design Operating Characteristics
25
Total Sa.22C Quiescent Power Dissipation, Typical (Free Convection)
27
Typical AP1 Level TEMPCO [-10º C to 75º C Base Plate Temperature]
27
Chapter 2 Design Integration Considerations
28
Design Integration Considerations Mechanical Considerations
29
Mounting Recommendations
29
Mounting an Sa.22C to a Circuit Board
29
Chapter 2 Design Integration Considerations Thermal Considerations
30
Thermal Considerations
30
Thermal Tape
30
Water Condensation and Excessive Humidity
30
Excessive Dust
30
External Interfaces and Grounding
31
Electrical Interface
31
1PPS Input and Output
31
Lock Signal
31
Service Signal
31
Frequency Control Signal
32
ACMOS Output Frequency
32
Frequency Control Analog
32
Greater than ±1E -9 Internal or External Control
32
Time Response of External Frequency Control
32
Modifiable Unit Settings
33
Susceptibility to Input Noise
33
Hardware and Software Selectable Items
33
Reliability and Maintenance
34
Reliability
34
Maintenance
34
Chapter 3 Installation and Operation
36
Installation
37
Site Selection
37
Turn-On Procedure
37
Suggested Connections for Sa.22C, Initial Turn-On
37
Chapter 3 Installation and Operation Start-Up Sequence
38
Start-Up Sequence
38
Sequence of Start-Up Events
39
Theory of Operation
40
Rb Control Loop Block Diagram
40
Chapter 3 Installation and Operation Troubleshooting
41
Troubleshooting
41
Repairs
41
Appendix A Using the Developer's Kit
42
Introduction
43
Mounting the Unit with the Adapter Test Board
43
Sa.22C Developer's Kit Without Heatsink Assembly
44
Sa.22C Developer's Kit with Heatsink Assembly
44
Interfacing of the Adapter Test Board
45
Developer's Kit Interconnect Diagram
45
SMA Connectors' Signal Information
48
Options for Supplying Power to the Adapter Test Board
49
Block Diagram of Suggested Test Setup
50
Power Supply and Output Options
51
Appendix B Symmetricom Serial Interface Protocol
54
Using the Symmetricom Serial Interface Protocol
55
Host Terminal Emulator Setup
55
Data Format
55
Factory Mode
57
Serial Interface Initialization
58
Factory Mode Commands
59
Sa.22C Administrative Mode Commands
60
Appendix C One Pulse Per Second Source Connection
62
Connection Requirements
63
Background
63
1PPS Functions
64
Time and Frequency Control System
64
System Requirements
65
Test Bench Setup
65
1PPS Algorithm Operation
66
Factory Default
66
Setting the 1PPS Synchronization
66
Changing the "Y" Coefficients
67
The "Y" Coefficients - Factory Default
68
The "J" Command
68
1PPS States Returned with the J Command
68
The "G" Command
69
1PPS Firmware Versions
70
Flywheeling Recovery - Normal
71
Flywheeling Recover with 1PPS Offset < 1Μsec
71
Recovery with Jamsynch
72
Flywheeling Recover with 1PPS Offset > 1Μsec
72
1PPS Algorithm Theory of Operation
73
1PPS Algorithm High Level Flow Chart
74
Sa.22C 1PPS Algorithm States
74
Initialization
75
Sa.22C Initialize State
75
Holdover
76
Sa.22C Holdover State
76
Calcslope
77
Sa.22C Calcslope State
77
Jamsynch
78
Sa.22C Jamsynch State
78
Discipline
79
Sa.22C Discipline State
79
Index
80
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