Alarm Status LED
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:
Dark
= Power is off.
Green
= The current reference source input is locked. No F73 related alarms.
Amber
=
The current reference source input is unlocked (e.g. broken antenna cable or no GPS signal). No
F73 Alarms. Timeout Delay is counting down, but hasn’t elapsed.
Red
=
An alarm has been triggered. Check F73 to find out what the fault/unlock condition is and take
appropriate action.
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 DDD:HH:MM:SS.
For example:
098-00116-000 Rev. A............................... Page 37 of 221
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