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Symmetricom ET6000 User Manual
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APPENDIX A
ASCII CHARACTER CODE TABLE
ASCII Character Code Table
Part One
DEC OCT
HEX
CHAR
0
000
00
NUL (^ )
1
001
01
SOH (^A)
2
002
02
STX (^B)
3
003
03
ETX (^C)
4
004
04
EOT (^D)
5
005
05
ENQ (^E)
6
006
06
ACK (^F)
7
007
07
BEL (^G)
8
010
08
BS (^H)
9
011
09
HT (^I)
10
012
0A
LF (^J)
11
013
0B
VT (^K)
12
014
0C
FF (^L)
13
015
0D
CR (^M)
14
016
0E
SO (^N)
15
017
0F
SI (^O)
16 020 10
DLE
(^P)
17 021 11
DC1
(^Q)
18 022 12
DC2
(^R)
19 023 13
DC3
(^S)
20 024 14
DC4
(^T)
21 025 15
NAK
(^U)
22 026 16
SYN
(^V)
23 027 17
ETB
(^W)
24 030 18
CAN
(^X)
25 031 19
EM
(^Y)
26
032
1A
SUB (^Z)
27
033
1B
ESC (^[ )
28
034
1C
FS (^ \ )
29
035
1D
GS (^ ] )
30
036
1E
RS (^^)
31
037
1F
US (^_ )
Note
:
First ^ denotes the Control Key.
Symm
etricom Inc
ET6xxx ExacTime GPS TC & FG (R
ev C)
A-1
105
107
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction
8
User's Guide Summary
8
Navstar/Gps Description
9
Product Description
10
Specifications
11
Gps Subsystem
11
Timing Outputs
11
Accuracy
14
Timing Inputs
14
J12 Rs-232 I/O Interface
15
Internal Time Base
15
Primary Power
18
Dimensions
20
Weight
20
Environment
20
Additional Specifications
21
Antenna/Preamp
21
Gps Rpu and Antenna
21
Functional Characteristics
21
Acquisition
21
Signal Interruption
22
Position and Velocity Solution
22
Dynamic Capability
23
Rf Jamming Resistance and Burn-Out Protection
23
System Status and Diagnostics
23
Gps Solution Modes
23
Elevation Angle Mask
24
Chapter One General Information
8
2 Introduction
26
Unpacking and Inspection
26
Rack Mounting Procedure
26
Tmra
26
Reduced Air Flow
27
Mechanical Loading
27
Circuit Overloading
27
Reliable Earthing
27
Antenna/Preamp Installation
27
Antenna/Preamp Interface Connections
27
Primary Power Connection
28
Gps Timing Unit Interface Connections
31
I/O Interface J12
31
Printer Output Port J11
32
Timing Outputs
32
1Pps Input
33
Oscillator Configuration
33
Chapter Two Installation
26
3 Introduction
36
Operational Steps
36
Initialization (Unknown Position)
36
Initialization (Known Position)
38
Operational Characteristics
39
Liquid Crystal Display
39
Main Menu Screen
39
Position Menu Screen
44
Set-Up Menu Screen
45
Rs232 I/O Configuration Menu Screen
50
Multiple Time Code Outputs Menu Screen
51
Preset Coincidence Menu Screen
51
External Frequency Measurement Menu Screen
52
Single Event Log Menu Screen
53
50/60Hz Measurement Screen
54
Auto Daylight Savings Menu Screen
56
Mux Output Menu Screen
56
Printer Port Configuration Menu Screen
58
Menu Screen Which Is Shown below and Contains this Choice
58
Column: 1 5 10 15 20 25 30 35
58
Row 1
58
Ieee-488 I/O Interface Menu Screen
61
Row 1
61
Chapter Three Operation
36
4 Introduction
64
Symmetricom Firmware Version
66
Utc Sync
67
Gps Sync
67
Print Frequency Offset
67
Print Time, Status, Error Code, and Satellite Vehicle Numbers
67
Print Position
69
Clear Event Data
70
Print Event Data
70
Request One Event Log Data
71
Enable Single Event Log
72
Disable Single Event Log
72
Select Mode
72
Enable Time Interval
73
Disable Time Interval
73
Request Time Interval
73
Request Elevation Mask Angle
74
Enter Elevation Mask Angle
74
Enable Disciplining
74
Disable Disciplining
74
Enter Position
75
Enter Dac Value
75
Request Dac Value
76
Number of Position Averages
76
Enter Local Offset
76
Enter Cable Delay
77
Request Cable Delay
77
Resynchronize Minor Time
77
Select Default Values
78
External Frequency Measurement - Select Input Frequency
78
External Frequency Measurement - Enable/Disable
79
External Frequency Measurement - Request Data
79
Request Satellite Signal Snr
79
Request Unit Operating Parameters
80
50/60Hz Selection
81
Enter 50/60Hz Offset Data
81
Request 50/60Hz Measurement Data
82
Printer - Set-Up Configuration
82
Printer - Request Configuration
83
Printer Port Mode Selection
83
Printer - Select Output Rate
84
Printer - Request Output Rate
84
Enable/Disable & Data Select
84
Enter Preset Coincidence Time
86
Request Mux Output
87
Set Mux Output
88
Set Major Time - Tod (Time of Day)
88
Set Year
88
Automatic Daylight Savings Time
89
Disable Auto Daylight Savings Time Function
89
Enable Auto Daylight Savings Time Function
89
Set Auto Daylight Savings Time Default Interval
89
Request Auto Daylight Savings Time Interval
90
Set Auto Daylight Savings Time Interval
90
Request Unit Serial Number
91
Chapter Four I/O Port Data Input/Output
64
5 Maintenance
92
Adjustments
92
Internal Oscillator Calibration
92
Lcd Adjustment
94
Ac Code Adjustments
94
10Mhz Sine Wave
94
10Mhz Square Wave
94
Troubleshooting
95
General
95
Power Led will Not Illuminate When On/Off Switch Is Activated
95
Tracking Led Does Not Illuminate
95
Locked Led Does Not Illuminate
96
Cold Reset
96
Theory of Operation
97
Gps System Operation
97
Exactime Internal Configuration
99
Microcomputer Program Theory of Operation
100
Chapter Five Maintenance/Troubleshooting
92
Appendix A
106
Part One
106
Part Two
107
Part Three
108
Part Four
109
APPENDIX C Three Channel Encoder
122
Mhz Sine Wave Shaper
137
Mhz Sine Wave Shaper
138
VDC Dual Power Input
139
VDC Power Supply
142
VDC Power Supply
144
Low Phase Noise Oscillator
149
Parallel BCD Output (Days – Milliseconds)
152
IEEE-488 I/O Interface
157
Mhz Sine Wave Shaper
168
Signal Distribution
174
Mhz Square Wave Output
177
Pulse Rate Module
200
Appendix D
204
Antenna Replacement Kit
204
4
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Symmetricom ET6000 Specifications
General
Brand
Symmetricom
Model
ET6000
Category
Receiver
Language
English
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