Provisioning Mtie And Frequency Alarms; Mtie Pre-Defined Settings - Symmetricom TSG-3800 Series User Manual

Phase history can provide a general indication of whether or not clocks are
following the input reference.
Comparing phase history with clock control value history to isolate clock and
input alarms.
Phase data continuously ascending and descending indicates frequency offset.
Phase data oscillation up and down indicates excessive network wander.
The display readings are in nanoseconds (chronological).
To display the most recent phase measurements for all inputs, type:
PHASE
For more information, refer to

Provisioning MTIE and Frequency Alarms

The TSG-3800 measures the Frequency offset and Maximum Time Interval Error
(MTIE) between each input and the clock in use. MTIE limits are expressed in 10
or nanoseconds. Frequency limits are expressed in 10
picoseconds/second. When an input exceeds a user-specified threshold, the
instrument responds in a user-defined manner.
The operator can specify two fault threshold limits (designated as L1 and L2) and
fault modes (Fail, Alarm, Report, and Ignore) for MTIE and frequency offsets. This
allows one threshold to serve as an early warning of failure and the second to serve
as a failure indicator. You can specify different fault thresholds and limits to each
input port. There are three pre-defined L1 and L2 fault threshold limits for MTIE and
Frequency: PRS, OCN, and MCD (see
shows the pre-defined MTIE settings for PRS, OCN, and MCD and
the pre-defined Frequency settings for PRS, OCN, and MCD.
Table 3-2. MTIE Pre-defined Settings
Configuration
PRS
OCN
(Factory Default Setting)
12778474-002-2 Revision F – March 2004
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then press Enter
Phase Command, on page 353.
Input
Time Scale
T100
T1000
T10000
T100
T1000
T10000
Operating the TSG-3800
Setting Up Input Reference Controls
-12
s/s or
Command, on page 350).
Table 3-3
Limit 1 (Fail) Limit 2 (Alarm)
270 216
540 432
1080 864
324 270
648 540
1296 1080
TSG-3800 User's Guide
-9
s
Table 3-2
shows
91