Functional Description and Specifications RUB SW
Page 21
2.2.4
Signal to Signal Drift
Signals within a pair should have no drift against each other.
SW
permanently checks the
signals for a drift.
Error
Word Clock Signal to Signal Drift
If the drift reaches or exceeds the “Limit Signal to Signal Drift“,
a
“
word clock signal to
signal drift
“ e
rror will be indicated. The cause of this error may be a faulty synchroni-
zation of the signal source.
The error status will be maintained for about 10 seconds, and then a new check starts. If
the drift still remains, an error will be indicated and counted again and again.
This error can be assigned to a signal pair only, so this error will not be considered for a
changeover.
The status monitor indicates these measurements and errors at the
System
page.
2.2.5
Signal to PPS Drift
This measurement requires connecting a precise second pulse.
SW
permanently checks the
eight word clock signals for a drift against this PPS.
Error
Signal to PPS Drift
If the drift reaches or exceeds the “Limit Signal to PPS Drift“, a
“
signal to pps drift
” error
will be indicated. The cause of this error may be a faulty synchronization of the signal
source if a real-time synchronization is required.
The error status will be maintained for about 10 seconds, and then a new check starts. If
the drift still remains, an error will be indicated and counted again and again.
This error will be classified as a major error, so this error will be considered for a
changeover.
The status monitor indicates these measurements and errors at
Input 1
page or
Input 2
page
resp.
