Chapter 5
Timing and 1 PPS Analysis Results
About TEM Module timing and 1 PPS analysis results
T-BERD/MTS 5800 Timing Expansion Module User Manual
Page 50
22112315, Rev. 004
July 2017
About TEM Module timing and 1 PPS analysis results
If an optional TEM Module is connected to your instrument, LEDs and results associ-
ated with timing are provided when the Timing Module tab is selected.
LEDs
The LEDs on the Timing Module tab are provided to indicate whether key events have
or have not taken place when synchronizing the module’s rubidium oscillator to GNSS
timing or to an external timing source. In addition to the LEDs provided in the panel, the
Longitude, Latitude, and Altitude of your instrument is provided. If applicable, the
number of satellites used to derive GNSS timing, the fix type, and the Oscillator status
is also provided.
If the TEM is in 1PPS Analysis mode, LEDs also indicate whether the reference and
analyzed signals clocks are valid.
If the instrument loses any of the LED events, the green Status LED extinguishes, and
the red Alarm LED in the history column illuminates indicating an error condition has
occurred.
Oscillator LEDs
describes the LEDs that are provided when the Rubidium Oscillator is turned
ON. The TEM Mode (Tuning, or 1 PPS Analysis), the user specified synchronization
source (for example, GNSS) and, if applicable, configuration (1 PPS vs 1 PPS IN 2)
appear above the LEDs.
Table 6
Oscillator LEDs
TEM Mode
LED
Indicates
Tuning
Present
Green
– A signal is present for the specified synchronization
source.
Grey
– The signal for the synchronization source was not
present at least one time since the last test restart.
Frequency Valid
Green
– The frequency for the signal is valid.
Grey
– The frequency for the synchronization source has
been invalid at least once since the last test restart.
