30
Startup and Operation
FAULT: TBP COM ERROR
dd/mm/yyyy hh:mm:ss
An error in communication exists between the TBP and the main processor. The fault disappears
if communication is reestablished. Second line is the time the fault occurred.
FAULT: VCXO FAIL
dd/mm/yyyy hh:mm:ss
The 8 MHz, Holdover Oscillator, signal is not getting to the main processor.
FAULT: HO / RECEIVER
GNSS RECEIVER FAIL
The Time Base Processor (TBP) is no longer receiving a 1 PPS signal from the GNSS receiver.
FAULT: HO / RECEIVER
RECEIVER SUSPECT
The Time Base Processor is receiving a 1 PPS signal from the receiver, but its rate is out of bounds
(a parametric failure).
FAULT: HO / RECEIVER
HO OSC. SUSPECT
The Holdover Oscillator frequency and/or drift parameters are out of bounds (parametric failure).
FAULT: HO / RECEIVER
HO OSC. LOOP UNLOCKED
The Holdover Oscillator (HO) Phase Lock Loop (PLL) is unlocked, which means that the PLL is
unable to maintain lock between the HO and the VCXO.
FAULT: HO /RECEIVER
HO OSC. FAIL
The Time Base Processor (TBP) is no longer receiving a signal from the Holdover Oscillator (HO).