Spectracom NetClock 9400 Series, Руководство пользователя

Страница: 158 / 467

E X A M P L E S :
You can setup Signature Control such that NetClock's built in 1PPS output becomes disabled the
moment its input reference is lost (e.g., if a valid GNSS signal is lost).
Or, you can setup your output signal such that remains valid while NetClock in holdover mode, but
not in free run.
The available options are:
I.
Output Always Enabled
—The output is present, even if NetClock is not synchronized to
its references (NetClock is free running).
II.
Output Enabled in Holdover —The output is present unless NetClock is not synchronized
to its references (NetClock is in Holdover mode).
III.
Output Disabled in Holdover —The 1PPS output is present unless the NetClock references
are considered not qualified and invalid (the output is NOT present while NetClock is in
Holdover mode.)
IV.
Output Always Disabled —The output is never present, even if NetClock references are
present and valid.
Table 2-8:
Signature control output-presence states
Ref.
Out-of-sync,
no holdover
In holdover
In-sync with
external reference
I.
II.
III.
IV.
Configuring Signature Control for an Output
To review or configure the Signature Control setting for any output:
142
CHAPTER
2
•
NetClock User Reference Guide Rev. 16
2.17 Configuring Outputs