Primary Power; Secondary Power; Rubidium Oscillator - Symmetricom XLi User Manual

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The Aux Ref indicator reports "OK" when a valid frequency is connected to the J3 input connector and
F113 is configured for the Aux Ref input. It reports Fault if the J3 input isn't getting a valid Aux Ref input
or function F113 isn't configured for the Aux Ref input.

Primary Power

Status: OK or Fault
The Primary Power indicator reports "OK" when the power supply voltages are normal. It reports "Fault"
when the power supply voltages exceed +/-10% of nominal supply regulation.
While the Primary Power indicator reports a fault, all outputs from the XLi are unreliable and should not
be used unless a Secondary Power supply is available and operating normally.
When seen from the rear of the XLi, the Primary Power indicator corresponds to the power supply mod-
ule in the lowest, left-most bay.

Secondary Power

Status: OK or Fault
The Secondary Power indicator reports "OK" when the power supply voltages are normal. It reports
"Fault" when the power supply voltages exceed +/-10% of nominal supply regulation.
While the Secondary Power indicator reports a fault, all outputs from the XLi are unreliable and should
not be used unless a Primary Power supply is available and operating normally.
Note:
If the Secondary Power Supply is not present or plugged in, no fault will be reported.
When seen from the rear of the XLi, the Secondary Power indicator corresponds to the power supply
module in the following locations:
• For the 1U chassis, the Secondary Power supply is located in Option Bays 3 & 4, which are the two
vertical bays to the left of the center of the unit.
• For the 2U chassis, the Secondary Power supply is located in the upper, left most bay, directly above
the primary power supply.

Rubidium Oscillator

Status: OK or Fault
The Rubidium Oscillator indicator reports "OK" when the Rubidium Oscillator is operating normally. It
reports "Fault" when the Rubidium Oscillator is warming up or has a PLL fault.
Faults that occur during the warm up period after the unit is started up are not significant and can be pre-
vented by extending the duration of the F73 Power-On Alarm Suppress feature.
Note: When using F73 in the front panel/display interface, the Rubidium Oscillator indicator is only
present if the unit is equipped with a Rubidium Oscillator. Otherwise, this indicator is hidden.
XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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