Symmetricom XLi IEEE 1588 User Manual

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The XLi features two user interfaces for controlling the XLi’s functions:

•

A keypad/display interface on the front panel of the XLi

•

A command line interface, available through the serial and network ports

•

A web interface, available from a browser connected to the XLi’s network port.

There is also an Alarm Status LED on the front panel.

The Alarm Status LED, located on the front panel, displays the alarm-state of the XLi unit. The LED has 
four states:

Notes: 

•

The amber LED can turn green again while the reference source input remains unlocked 

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.

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 time format is DDD: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.

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