Symmetricom X72 Manuals

Manuals and User Guides for Symmetricom X72. We have 1 Symmetricom X72 manual available for free PDF download: User Manual

Symmetricom X72 User Manual

Symmetricom X72 User Manual (98 pages)

Rubidium Oscillator

Brand: Symmetricom | Category: Test Equipment | Size: 6 MB

Table of Contents

Table of Contents
3
Purpose of this Guide
12
Who Should Read this Guide
12
Structure of this Guide
12
Conventions Used in this Guide
13
Warnings, Cautions, Recommendations, and Notes
14
Related Documents and Information
15
Where to Find Answers to Product and Document Questions
15
What's New in this Guide
15
Chapter 1 Description

17
Chapter 2 Design Integration Considerations

27
- Mechanical Considerations
  28
- Thermal Considerations
  34
  - Thermal Tape
    34
  - Standard Edge Board
    34
  - Water Condensation and Excessive Humidity
    35
  - Excessive Dust
    35
- External Interfaces and Grounding
  35
- Electrical Interface
  36
  - X72 RF Outputs
    36
  - X72 1 PPS Input and Output
    36
  - Lock Signal
    36
  - Service Signal
    37
  - X72 Frequency Control Signal
    37
  - X72 ACMOS Output Frequency
    37
- Frequency Control Analog
  38
- Modifiable Unit Settings
  39
- Hardware Selectable Items
  39
- Software Selectable Items
  39
- X72 Susceptibility to Input Noise
  40
  - Input Filtering
    40
- X72 Reliability and Maintenance
  41
  - Reliability
    41
  - Maintenance
    41
Chapter 3 Installation and Operation

43
- Installation
  44
- Start-Up Sequence
  45
- Sequence of Start-Up Events
  46
- Theory of Operation
  47
- X72 Rb Control Loop Block Diagram
  47
- Troubleshooting
  48
- Repairs
  48
  - X72 Warranty
    49
Appendix A X72 J1 Connector and Plug

51
- Molex Connector
  52
- Molex Connector Plug Assembly
  53
- Edge Board Pinout
  54
- Edge Board Pinout Comparison
  54
- 3.25 Inch Interface Cable
  55
- Inch Interface Cable Connections
  55
- Edge Board Layout Drawing
  56
- Layout Drawing for Edge Board
  56
Appendix B Symmetricom Serial Interface Protocol

57
- Using the Symmetricom Serial Interface Protocol
  58
  - Host Terminal Emulator Setup
    58
  - Data Format
    58
  - Factory Mode
    61
  - Floating Point Number Representation
    61
  - Floating Point Number Representation for SSIP
    61
  - Run Mode Commands
    62
  - Factory Mode Commands
    63
  - Administrative Mode Commands
    64
  - Output Control Status Register Structure
    64
Appendix C Using the X72 Developer's Kit

67
- Introduction
  68
  - Mounting the X72 Unit
    68
  - Interface Cabling/Circuit Cards
    68
- Symmetricom Serial Interface Protocol (SSIP)
  69
  - Turn-On Procedure
    69
  - Suggested X72 Test Setup
    69
  - Top View of X72 Case
    70
  - X72 Dimensions
    71
  - Connector J1 Signal Information
    71
- Start-Up Sequence
  72
- X72 Development Kit Hardware
  73
Appendix D One Pulse Per Second Source Connection

77
- Connection Requirements
  78
  - Background
    78
  - X72 1PPS Functions
    79
  - X72 Time and Frequency Control System
    79
- System Requirements
  80
- Test Bench Setup
  80
- X72 1PPS Algorithm Operation
  81
  - Factory Default
    81
  - Setting the X72 for 1PPS Synchronization
    81
  - Changing the "Y" Coefficients
    82
  - The "Y" Coefficients - Factory Default
    82
  - The "J" Command
    83
  - The "G" Command
    83
  - 1PPS States Returned with the J Command
    83
  - 1PPS Firmware Versions
    84
- Flywheeling Recovery - Normal
  85
- X72 1PPS Algorithm Theory of Operation
  87
  - X72 1PPS Algorithm High Level Flow Chart
    88
  - X72 1PPS Algorithm States
    88
  - Initialization
    89
  - X72 Initialize State
    89
  - Holdover
    90
  - X72 Holdover State
    90
  - Calcslope
    91
  - Jamsynch
    92
  - Discipline
    93

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