Figure 21: Frame slip tracking thresholds
Free run (non-tracking) mode
A maintenance threshold and an out-of-service threshold are
set in LD 73 as described below. Also, see
Figure 22: Frame slip non-tracking thresholds on
page
116 for additional information.
Table 52: LD 73 - SRNT prompt
Prompt Response Description
SRNT 1-(15)-1024 1-
(3)-1024
Non-tracking slip rate maintenance and out-of-service
thresholds.
These are frame slip rate thresholds for the non-
tracking mode.
The first value is the maintenance
threshold in seconds, the amount of time in which 10
slips occur (default is 10 slips in 15 seconds). The
second value is the out-of-service threshold in
seconds, the amount of time in which 10 slips occur
(default is 10 slips in three seconds).
When these thresholds are reached, DTA messages
are output. Related DTA messages are described
below. See
Figure 22: Frame slip non-tracking
thresholds on page 1
16.
DTA017:Frame slip — free run (non-tracking) —
maintenance limit.
DTA018:Frame slip — free run (non-tracking) — out-
of-service limit.
DTI/PRI maintenance tools
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