Keysight N9927-90001 User’s Guide                                                            491
System Settings
System Configuration
—Ant: OK – antenna present and working. 
—Ant: OPEN – antenna is not drawing DC bias current. This could occur when 
an active antenna is not connected properly or the antenna does not require 
DC bias current. Antennas that do not require bias current can still provide 
an accurate GPS reading.
—Ant: SHORT – antenna center pin has been shorted to ground. The internal 
bias circuitry is disabled for about one minute, then re-enabled. You can 
also press GPS OFF
, then GPS Internal to quickly re-enable the antenna 
bias.
More GPS settings
—Press System 7
—Then System Configuration
—Then GPS
— Then choose from the following:
— Enable and disable the synchronization of the FieldFox internal clock to the 
GPS UTC time standard. 
— ON  The FieldFox clock is synchronized and updated approximately 
once every hour to the time of the GPS clock.
— OFF
  The FieldFox clock is NOT synchronized with GPS. When set to 
OFF after Sync was ON, the date and time does NOT revert back to 
the settings before the clock was synchronized.
— Lat/Lon Format
 Change the format of the GPS display on the FieldFox 
screen. Choose from:
— ddd°mm’ ss.sss”
   degrees, minutes, seconds (default setting)
— ddd°mm.mmmmm’
  degrees, minutes, fractional minutes
— ddd.ddddddd°
 decimal degrees
— None
  Lat/Lon is not displayed.
— Elevation Unit
   Choose from:
— m
  (Meters) 
— Feet
 
— Inches
 
The GPS Sync setting has the same restrictions as the Date and Time 
setting. Learn more in “Date and Time” on page 483.