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A P P E N D I X G
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M e r i d i a n I I U s e r M a n u a l
S Y S T E M F A U L T S
GPS Subsystem FPGA Configuration (FPGA)
This fault indicates that the GPS Subsystem is unable to configure the FPGA. This is a fatal fault.
Please contact EndRun Customer Support.
GPS Subsystem FLASH Writes (FLSH)
This fault indicates that the GPS Subsystem is unable to verify a write to the FLASH non-volatile
parameter storage area. This should never occur under normal operation.. Please contact EndRun
Customer Support.
GPS Receiver Communication (RCVC)
This fault indicates that the GPS Subsystem is unable to establish communications with the GPS
Receiver. Please contact EndRun Customer Support.
GPS Reference Time (REF)
This fault indicates that the GPS Subsystem received an erroneous time input from the GPS Receiver.
If the condition persists please contact EndRun Customer Support.
Subsystem Communication (POLL)
This fault indicates that the GPS Subsystem is not receiving polling requests from the Linux Sub-
system. This could be due to a hardware or software failure. If the condition persists please contact
EndRun Customer Support.
GPS Receiver (RCVF)
This fault indicates a problem with the GPS Receiver. See the section below (
Receiver Faults
) for
more information.
System Oscillator PLL (Phase-Lock-Loop)
This fault indicates that there is an unlock condition between the main system oscillator and the other
system timebase clocks. This is a fatal fault. Please contact EndRun Customer Support.
GPS Antenna (ANT)
This fault indicates that the GPS antenna or cable has a fault. It indicates either an over or under cur-
rent condition. Usually it means that the antenna cable is not plugged into the connector on the rear of
the Meridian II. To see whether it is a short or an open check the receiver faults. This fault may also
occur when using an antenna signal splitter. In this case you may want to mask the fault. Use the
setantfltmask
command.
Plug-In Option (OPT)
This fault indicates that an unrecognized option module was plugged in the Meridian II. This may
occur if you try to install an option module from a first-generation Meridian into a Meridian II. The
Meridian and Meridian II option modules are not compatible.
System Power/Configuration (PWR)
This fault indicates misconfiguration of the Meridian II chassis which may have caused a power over-
load. This is a fatal fault. Please contact EndRun Customer Support.
5071A - Option
Used only when the 5071A Cesium Control Module is installed. This fault indicates a problem with
the 5071A. See
Chapter 10 - Options, 5071A Cesium Control Module, Faults
for information.
Summary of Contents for Meridian II
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