EndRun Tempus LX GPS, User Manual

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T e m p u s L X G P S U s e r M a n u a l 34
C H A P T E R F I V E
35 T e m p u s L X G P S U s e r M a n u a l
F R O N T - P A N E L K E Y P A D A N D D I S P L A Y
System Status: Indicates either OK or flashing FAULT. A fault status indicates that one or more
of the built-in fault checking processes has detected an error condition. See
Faults Display in this chapter for more information.
An alternate Time/Status display can be viewed by pressing the right arrow key. You can go back to
the original Time/Status display by pressing the left arrow key.
181 : 12 : 59 : 45
U
T
C
Sys Stat- OK
Receiver- Locked
Main Menu
Press ENTER from the Time/Status display to select the Main Menu display. The Main Menu pro-
vides access to the following displays: Receiver , Clock , CPU-I/O , Display , Faults , Network , NTP ,
Firmware
, and
About
. To select one of these items use the RIGHT and LEFT keys to highlight it.
Then push ENTER to select the highlighted item. These displays are described in detail below.
Receiver Menu
The Receiver Menu is selected from the Main Menu and provides access to the Receiver Status, Os-
cillator Status, Reference Position, and GPS Dynamic Mode displays described below.
Receiver Status
This display provides information associated with the operation of the GPS receiver. Press DOWN to
scroll through all the information.
Rcvr State - Locked TFOM - 4
GPS RECEIVER STATUS
MORE
Satellite ID# - 25, 03, 11, 14, 23, 31, 25, 28
Carrier / Noise - 34.5
MORE
Receiver State: This shows the current state of the GPS receiver subsystem. The state may be:
acquire, locking, or locked. When locked, the GPS receiver is synchronized to
the signal and it is disciplining the internal oscillator to remove frequency and
time errors.
TFOM: A detailed explanation of TFOM is in
Appendix E - Time Figure-of-Merit
.
Briefly, TFOM indicates clock accuracy where:
4 time error is < 1 us
5 time error is < 10 us
6 time error is < 100 us
7 time error is < 1 ms
8 time error is < 10 ms
9 time error is > 10 ms, unsynchronized state if never locked to GPS.