M e r i d i a n I I U s e r M a n u a l
30
C H A P T E R T H R E E
31
M e r i d i a n I I U s e r M a n u a l
C O N T R O L A N D S T A T U S C O M M A N D S
Bit 3
Bit 2
Bit 1
Bit 0
Char 0
GPS Rcvr
FLASH Writes
GPS Rcvr
FPGA Config
GPS Signal
GPS Rcvr
Oscillator DAC
Char 1
GPS Rcvr
Oscillator
GPS Reference
Time
Synthesizer
Synthesizer Limits
Char 2
N/A
Rcvr Osc PLL
Antenna Open
Antenna Short
Char 3
N/A
N/A
N/A
N/A
FLTS
is the fault status for the GPS Subsystem. This is a numeric value consisting
of four hexadecimal characters where each bit indicates a particular system fault.
Assertion of any of these bits will light the Alarm LED. Bit definitions are shown below.
Decoding the bits can be difficult for non-programmers. For a more user-friendly method
of reading the fault status use the
faultstat
command. For details on each system
fault see
Appendix G - System Faults
.
Bit 3
Bit 2
Bit 1
Bit 0
Char 0
FLASH Writes
FPGA
Configuration
GPS Signal
System Oscillator
DAC
Char 1
GPS Receiver
Subsystem
Communication
GPS Reference
Time
GPS Receiver
Communication
Char 2
GPS Antenna
System Osc PLL
Secondary Power
Supply
Primary Power
Supply
Char 3
System Power/
Configuration
N/A
5071A
Plug-in Option
The Primary and Secondary Power Supply bits are only used if your Meridian II has the Dual-Re-
dundant Power Supply option. The 5071A bit is used only if the 5071A Cesium Control Module is
installed.
The example reply below indicates that there has been a period without tracking a GPS signal that
exceeded the time-out period, that there was a FLASH Write Fault and that there is an Antenna Fault.
Command:
gpsstat
MeridianII reply:
LOCKED TFOM = 4 2001 092 04:48:56 13 13 2 7 151 328605 41.6 0200 0880
gpstrkstat
This command displays the current GPS Subsystem satellite tracking status. A list of twelve satellite
numbers along with azimuth, elevation and C/No is displayed for each receiver channel. Satellite
number 0 is an invalid number and indicates that no satellite is being tracked on that channel. Valid
satellite numbers range from 1 to 32. Azimuth and elevation are in degrees and C/No is in dB.
Summary of Contents for Meridian II
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