Spectracom VelaSync 1225, Руководство пользователя

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Web UI Page loc-
ation
Current Status Indication Troubleshooting
MANAGEMENT/
NETWORK page Cannot login or access
the Web UI. The following
error message
is displayed:
“Forbidden
You don’t have
permission to
access/ on this
server” This message is displayed when
any value has been added to the
Network Access Rules table and
your PC is not listed in the table as
an Allow From IP address.To
restore access to the Web UI,
either
1. Login from a PC that is listed as
an Allow From in this table; or
2. If it is unknown what PCs have
been listed in the Access table, per-
form an
unrestrict command
to remove all entries from the Net-
work Access Rules table. This will
allow all PCs to be able to access
the Web UI.
Table 5-2: Troubleshooting using the Web UI Status indications
5.1.5 Troubleshooting GNSS Reception
If VelaSync reports Holdover and/or Time Sync Alarms caused by insufficient GNSS
reception:
When a GNSS receiver is installed in VelaSync, a GNSS antenna can be connected to the
rear panel antenna connector via a coax cable to allow it to track several satellites in
order for GNSS to be an available input reference. Many factors can prevent the ability
for the GNSS receiver to be able to track the minimum number of satellites.
With the GNSS antenna installed outdoors, with a good view of the sky (the view of the
sky is not being blocked by obstructions), VelaSync will typically track between 5-10
satellites (the maximum possible is 12 satellites). If the antenna’s view of the sky is
hindered, or if there is a problem with the GNSS antenna installation, the GNSS receiver
may only be able to a few satellites or may not be able to track any satellites at all.
When GNSS is a configured time or 1PPS input reference, if the GNSS receiver is unable
to continuously track at least four satellites (until the initial GNSS survey has been com-
pleted) or at least one satellite thereafter, the GNSS signal will not be considered valid.
If no other inputs are enabled and available, VelaSync may not initially be able to go into
time sync. Or, if GNSS reception is subsequently lost after initially achieving time sync,
VelaSync will go into the Holdover mode. If GNSS reception is not restored before the
Holdover period expires (and no other input references become available) VelaSync will
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APPENDIX