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Chapter 5 Timing and 1 PPS Analysis Results
Event Log
T-BERD/MTS 5800 Timing Expansion Module User Manual
July 2017 22112315, Rev. 004 Page 51
GNSS LEDs
Table 7 describes the GNSS LEDs. The status (for example, Fixed Position) appears
above the LEDs; the longitude, latitude, and altitude of the test instrument appear under
the LEDs.
Event Log
The Event Log provides a list of events that take place as the oscillator tunes to an
external reference signal. Events captured in the log include “Warm Up,” “Wait 1PPS,”
“Initializing,” “Coarse Tune,” and others as the oscillator progresses through the tuning
process. Each event is numbered sequentially, with a date, start and stop time stamps,
1 PPS Analysis Ref CLK Valid Green
– A valid reference clock is present.
Grey
– A valid reference clock is not present.
Input CLK Valid Green
– A valid clock for the analyzed signal is present.
Grey
– A valid clock for the analyzed signal is not present.
Table 6 Oscillator LEDs
TEM Mode LED Indicates
Table 7 GNSS LEDs
LED Indicates
GNSS Time Green
– The TEM Module’s GNSS receiver has received
valid GNSS time information.
Grey
– The GNSS time is not yet valid, or has become
invalid since the last test restart.
Antenna Fault Red
– An antenna fault (short or open) has occurred
since the last test restart. Used only if the antenna
power is set to 3.3 or 5 volts.