X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
3
3
2
2
R
R
E
E
V
V
E
E
where XXX is one of "OK", "OPEN", or "SHORT". Pressing the up or down arrow keys or
"FUNC/ENTR" will display the next status indicator:
Fault Status
PLL: XXXXXXXX
where XXXXXXXX is either "OK" or "UNLOCKED". Pressing the up or down arrow keys or
"FUNC/ENTR" will display the next status indicator:
Fault Status
GPS: XXXXXXXX
where XXXXXXXX is either "LOCKED" or "UNLOCKED".
3-173 KEYPAD FUNCTION 73 - REQUEST/SET ALARM STATUS/CONTROL
This function allows the user to control which conditions will signal an alarm or fault through the 87-6XX
GPS-XL sub-assembly open collector output at P46B pin 1, or through relay contacts on 86-336 or
86-379 option boards. The user may also monitor the status of the individual indicators which may
contribute to the summary alarm outputs. In addition, a latched fault indication on each of the the
individual faults will be shown on the alphanumeric display by an asterisk character in the bottom right-
most character position. This indication is useful in determining whether transient faults are occurring.
Keypad Function F73 allows the operator to scroll through the fault conditions that can affect the alarm
outputs, and enable or disable each one's contribution to the alarm outputs. The fault condition is
sampled on entering each fault display. At any time, the user may exit F73 without changing the alarm
mask settings by pressing TIME, STATUS, or POSITION.
Press FUNC/ENTR, then "73", and the screen displays:
Clock Status
GPS: <locked status>
where <locked status> can be "Locked" or "Unlocked", indicating whether the clock is locked to GPS
within specifications.
To proceed, press FUNC/ENTR. The next screen displays:
Position Status
<ave. status>
where <ave. status> summarizes the state of the position averaging process, and can be "Full
Accuracy", "Position Approx.", "Position Unknown", or "Pos, Time Unknown". When the unit is
operated in AUTO mode, and has obtained its first 3-D position fix, the Position Status is "Position
Approx.". When the position averaging process is completed, switching the clock into TIME mode, the
unit has reached "Full Accuracy". "Full Accuracy" is also displayed if the unit has a measured 3-D
position and is manually switched into TIME mode, or if the operator enters an assumed good position
while in TIME mode. When operated in the SURVEY mode and the unit has a measured position, this
screen will indicate "Position Approx.".
Содержание 151-600
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