Symmetricom TimeSource 3600, Руководство пользователя

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3
Installation
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28 If not using ESCIU ports, skip to Step 30. Use the Edit Equipment command to
specify how the ESCIU performs during holdover:
ED-EQPT::TS3600:<ctag>:::BYPASS=a;
a = E1 traffic bypasses the ESCIU circuitry (a = ALW) or continues to be
synchronized during holdover (a = INH).
29 Use the Edit Equipment command to specify how the ESCIU performs with a loss-
of-signal (LOS) alarm on the incoming span:
ED-EQPT::OPT-a:<ctag>:::ALMOUT=b;
a = Directs this command to the ESCIU span 1 (a = 1) or 2 (a = 2)
b = If LOS is detected on the incoming span, the ESCIU passes AIS
downstream (b = AIS), or passes the alignment sequence through to the
NE with the original input alarm (b = PASSTHRU).
30 If the results of Step 19 indicate the antenna cable delay and elevation mask are set
as desired, skip to Step 34. Use the Edit Equipment command to set the length of
cable between the antenna and the TimeSource 3600 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=a,ANTELEVMASK=b;
a = antenna cable delay in meters (a = 0 to 330)
b = antenna elevation mask angle in degrees (b = 0 to 45) (see note
below)
Note:
The antenna elevation mask is that portion of the sky from which the
TimeSource 3600 masks out satellite signals, measured as an angle of elevation
from the horizon. Reflections or other anomalies may disturb signals received from
an area of the sky that has obstructions, usually the area near the ground. Masking
that part of the sky may allow the receiver to acquire GPS signals more quickly and
accurately. Factory setting is 10.
Procedure G. Power Up (cont’d)
Step Procedure