Chapter 3 Installing the TimeSource 3100
Powering Up the Shelf
80 TimeSource 3100 User’s Guide 097-72020-01 Revision K – December 2005
Set the Antenna Parameters
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;
where:
x = antenna cable delay in meters (x = 0 to 330)
y = antenna elevation mask angle in degrees (y = 0 to 45) (see note below)
Set the TOD Output Parameter
32.If you are 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;
where:
y = TOD format (y = Cisco or NTP4)
Set the Alarm Conditioning Parameter
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;
where:
y = alarm conditioning of the outputs (y = ALW or INH)
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.
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