MANUAL P/N 900000007 REV 2.0
4
Table of Contents
1Introduction ............................................................................................................................. 6
1.1 Scope of Section ............................................................................................................ 6
1.2 Purpose of Equipment.................................................................................................... 6
1.3 Specification ...................................................................................................................7
1.4 Controls, Indicators, and Connectors........................................................................... 11
2Installation............................................................................................................................. 13
2.1 Scope of Section .......................................................................................................... 13
2.2 Unpacking and Inspection............................................................................................ 13
2.3 Installation and Testing ................................................................................................ 13
3Operating Instructions........................................................................................................... 14
3.1 Scope of Section .......................................................................................................... 14
3.2 Operation...................................................................................................................... 14
3.3 Serial Communications ................................................................................................ 17
3.4 TxD1/RxD1 (Rear Panel J13) Baud Rate and Character Format................................ 18
3.5 TxD1/RxD1 (Rear Panel J13) User Commands and GPS8 Plus Responses ............. 19
3.6 Message Formats......................................................................................................... 22
3.6.1 Time and Date with Status, Position Averager Status, and Output Status ......... 22
3.6.2 Sounder Control .................................................................................................. 23
3.6.3 1
st
Pulse Output Data and Command (J10) ........................................................ 23
3.6.4 Dilution of Precision Values and Satellites Used................................................. 26
3.6.5 Time Code and Serial Data Output Formats ....................................................... 27
3.6.6 Frequency and Phase Controller Data ................................................................ 30
3.6.7 Health Status of Satellites ................................................................................... 36
3.6.8 Leap Second Information (Firmware 13+)........................................................... 37
3.6.9 2
nd
Pulse Output Data and Command (PCB CON6 Pin 3).................................. 38
3.6.10 Location and Signal Noise Ratio of Satellites...................................................... 39
3.6.11 Firmware Version Number................................................................................... 40
3.6.12 Offset of Local Time Data and Command........................................................... 41
3.6.13 Position of GPS Antenna..................................................................................... 42
3.6.14 Additional Information (Including Magnetic Declination) ..................................... 43
3.6.15 Request Precision Time ...................................................................................... 43
3.6.16 Software Reset Command .................................................................................. 44
3.7 TxD2/RxD2 Messages (Rear Panel J12) ..................................................................... 45
3.7.1 Type 1 Format ..................................................................................................... 45
3.7.2 Type 2 Format ..................................................................................................... 45
3.7.3 Type 3 Format (GPS4 Format)............................................................................ 47
3.8 IRIG B and AFNOR NF 2 87-500 Time Code Output .................................................. 48
3.8.1 IRIG B and AFNOR NF 2 87-500 Time Code Bit Allocation ............................... 49
3.9 NASA36 Time Code Output ......................................................................................... 51
3.10 2137 Time Code Output............................................................................................... 53
3.11 VELA Time Code Output (Slow Code)......................................................................... 54
3.12 Alarm Contacts (J14) ................................................................................................... 55
4GPS8 Plus Keypad and Display Operation .......................................................................... 56
4.1 Scope of Section .......................................................................................................... 56
4.2 General Principles of Operation of Keypad and Display.............................................. 56
4.3 Messages after Power On............................................................................................ 57
4.3.1 Operating Mode Selection ................................................................................... 58
4.3.2 GPS Locked Mode .............................................................................................. 58
4.3.3 Free Run Mode.................................................................................................... 59
4.3.4 1 PPS Lock Mode................................................................................................ 59
4.3.5 Manual Time and Date Entry............................................................................... 59
4.4 Position Screen ............................................................................................................ 60
4.5 Satellites Tracked Screen ............................................................................................ 60
4.6 1 PPS Status Screen ................................................................................................... 61
4.7 Mean Phase Screen..................................................................................................... 62
4.8 Estimated Mean Frequency ......................................................................................... 63
