R T M 3 2 0 5 U s e r M a n u a l
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C H A P T E R T H R E E
27
R T M 3 2 0 5 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
C/No
is the received GPS Carrier Signal-to-Noise Ratio, 0.00 to 99.9, measured in dB in a 1Hz
bandwidth. Typical range is 39 to 50.
FLTR
is the fault status for the GPS Receiver. This is a numeric value consisting of
four hexadecimal characters where each bit indicates a particular receiver 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
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
N/A
N/A
Char 3
N/A
N/A
N/A
N/A
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
RTM3205 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 RTM3205
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