User's Manual

WLS Installation and Maintenance Manual Installation
Geometrix
®
Wireless Location System 29
Andrew Corporation Proprietary
Minor Alarms
A minor alarm will indicate a condition that the user should be alerted to, but does not indicate an
immediate impairment to functionality. The alarms will include:
• Oscillator voltage near rail
• Antenna input connection is open, i.e., the input is not drawing sufficient current
• Antenna input is shorted, i.e., the input is drawing too much current
• No satellites are usable
• Oscillator is not being disciplined to GPS
• Self Survey procedure in progress
• No accurate position stored in EEPROM
• A leap second is pending
• Test mode in progress
• Accuracy of position being used for a time-only fix is questionable
• Detected one or more EEPROM segments corrupt at reset
• Almanac not current or complete
Critical Alarms
A critical alarm will indicate a condition that severely impairs the function of the GPS module.
These alarms will include:
• ROM Checksum Error detected at reset
• RAM Check failed at reset
• FPGA Check failed at reset or during operation
• Oscillator control voltage is at a rail
Failures
The summary result will indicate FAIL if any of the following conditions exist:
• Presence of any critical alarms
• Minor alarm, Oscillator voltage near rail
• Minor alarm, Antenna input connection is open, i.e., the input is not drawing sufficient
current
• Minor alarm, Antenna input is shorted, i.e., the input is drawing too much current
• Minor alarm, No satellites are usable
• Minor alarm, Self Survey procedure in progress
• Decoding Status not set to “Doing Fixes”
• Disciplining Activity not set to “Phase Locking"
• PPS Quality > 1000 ns
An example of the test display is shown below. Table 2-3 provides descriptions of the various
status fields.
Note: Some detailed status information is presented for information purposes only.
Enter your choice: 7
GPS TEST:
Critical Alarms: None
Minor Alarms:
Self Survey In Progress