48
The Setup Menus
6.10
Set the Auto Survey Mode
Use one of the Auto Survey modes to control how and when the clock determines position infor-
mation. The accuracy of the position (and indirectly, time) is based on averaging the assigned
number of position fixes surveyed, either during startup or by a single survey. At the conclusion
of a survey, the clock is placed in Position Hold mode and the averaged position is placed into
memory. If accurate position information is used, this results in a reduced standard deviation for
the time data.
RS-232C: see Section 9.2.8
There are five Auto Survey modes available:
1. Turn Off Survey – halt the survey in progress
2. Single Survey – initiate a new survey at this time
3. Power-On Survey – initiate a new survey when the clock is powered on
4. Suspend Survey – pause a survey in progress
5. Resume Survey – resume a survey that was paused
Figure 6.19: Survey Mode Setup
6.10.1
Number of Fixes
Auto Survey configuration presents a list of possible surveys from 1 to 86,400 seconds (approx. 24
hours). Surveys are listed as 1 (single fix), 60 (1 minute or more), 300 (5 minutes or more), 900 (15
minutes or more), 1800 (30 minutes or more), 3600 (1 hour or more), 7200 (2 hours or more), 14400
(4 hours or more), 28800 (8 hours or more), 43200 (12 hours or more), and 86400 (24 hours or
more). To complete a survey, the GPS receiver must be tracking at least four satellites. If, during
a survey, the number of satellites being tracked drops below four, the survey will pause until the
GPS receiver again begins tracking four or more satellites. Then, the survey will resume computing
positions until completion.
Summary of Contents for 1084A
Page 4: ...iv ...
Page 6: ...vi ...
Page 18: ...xviii LIST OF FIGURES ...
Page 24: ...4 Unpacking the Clock ...
Page 36: ...16 Connecting Inlet Power Input and Output Signals ...
Page 44: ...24 GPS Antenna and Cable Information ...
Page 114: ...94 Startup and Basic Operation ...
Page 123: ...B 4 Physical Dimensions 103 Figure B 1 Suggested Mounting of the AS0094500 Surge Arrester ...
Page 124: ...104 Using Surge Arresters ...
Page 134: ...114 Options List C 6 2 Option 06 Firmware Setup Figure C 3 Option 06 Firmware Setup ...
Page 142: ...122 Options List Figure C 5 Option 06 Output Jumper Settings ...
Page 158: ...138 Options List Figure C 13 Option 17 Board Layout and Jumper Locations ...
Page 163: ...C 13 Option 20A Four Fiber Optic Outputs 143 Figure C 14 Option 20A Jumper Locations ...
Page 170: ...150 Options List Figure C 16 Option 23 Internal Jumper Setup ...
Page 172: ...152 Options List Figure C 17 Option 27 Jumper Locations ...
Page 190: ...170 Options List Figure C 20 Option 29 Connector Signal Locations ...
Page 246: ...226 Options List ...