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997-01530-01, Rev. C-25, Jan 2008 25
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4: User Interfaces
The XL-GPS features two user interfaces for controlling the XL-GPS’s functions:
• A keypad interface
on the front panel of the XL-GPS
• A command line interface
available through the serial and network ports
There is also an Alarm Status LED
on the front panel.
Alarm Status LED
The Alarm Status LED, located on the front panel, displays the alarm-state of the XL-GPS unit.
The LED has four states:
Notes:
• The amber LED can turn green again while the reference source input remains unlocked. This is
because:
- F119’s ‘GPS Status’ controls whether
the LED turns amber.
- F73’s ‘Timeout Delay’ controls how long
the LED remains amber.
• The blinking of the LED has no meaning. It is a user preference that can be enabled or disabled
using the F73’s ‘LED Blink’ setting. If enabled, the LED blinks when it is green and yellow, but
stays unblinking when it is red. If disabled, the LED doesn’t blink.
keypad Interface
Time Display
Press the TIME button on the keypad to display the time only. Use the TIME button to exit the STATUS,
MENU, or function displays. The default time format is HH:MM:SS.
Dark
= Power is off.
Green
= No F73-related alarms. The current reference source input is locked.
Amber
= No F73 Alarms. Timeout Delay is counting down, but hasn’t elapsed. The current reference
source input is unlocked (e.g. broken antenna cable or no GPS signal)
Red
= An indicator in F73 has triggered an alarm. Check F73 to find out what the fault/unlock condition
is and take appropriate action.