Symmetricom TimeSource 3100, Руководство пользователя, Страница: 90 / 238

90
TimeSource 3100
Installation
097-72020-01 Issue 9: November 2003
S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
3
End of Procedure
31 If the results of Step 19 indicate the antenna cable delay and elevation mask set are as
desired, skip to Step 33. Use the Edit Equipment command to set the length of cable
between the antenna and the TimeSource 3100 Shelf. This number should have been
recorded during installation. Use the same command to set the antenna elevation mask
angle.
ED-EQPT::GPS:<ctag>:::ANTCBLDLY=x,ANTELEVMASK=y;
x = antenna cable delay in meters (x = 0 to 330)
y = antenna elevation mask angle in degrees (y = 0 to 45) (see note below)
Note: The antenna elevation mask is that portion of the sky from which the TimeSource
3100 masks out satellite signals, measured from the horizon to the desired angle of
elevation. For example, if the sky is obstructed below 20° elevation, signals received from
below that elevation may have reflections or other anomalies. Masking those signals may
allow the receiver to acquire GPS signals more quickly and accurately. Factory setting is
10.
32 If not using the TOD output, skip to Step 33. Use the Edit Equipment command to set the
TOD output.
ED-EQPT::TS3100:<ctag>:::TOD=y;
y = TOD format (y = Cisco or NTP4)
33 Use the Edit Equipment command to allow or inhibit alarm conditioning on the outputs.
Inhibiting the alarm conditioning forces the TimeSource 3100 to continue to output valid
timing signals while in alarm. This may be useful when testing, troubleshooting, or in
installations where the outputs generated by the TimeSource 3100 may be better than the
alternative (for example, offices without additional holdover clocks in a distribution shelf).
ED-EQPT::TS3100:<ctag>:::ALMCOND=y;
y = alarm conditioning of the outputs (y = ALW or INH)
34 Use the Copy Memory command to copy the database from volatile to nonvolatile memory
within the TimeSource 3100.
CPY-MEM:[tid]:TS3100:<ctag>::WKG,,AUX:DATA;
Note: Although the database is automatically copied to nonvolatile memory once per hour,
it is recommended that the Copy Memory command be executed each time the database is
changed.
Procedure E. Power-Up (cont’d)
Step Procedure