Spectracom NetClock 9400 Series, User Reference Manual

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This menu option allows you to disaable/enable Jamming or Spoofing. Spoofing refers to
impersonating the live-sky GNSS signal, thus "deceiving" the GNSS receiver, while Jamming
refers to interference of the signal, i.e. making the live-sky GNSS signal unusable. Per default,
both are Enabled.
ABOUT
The About menu displays Version and Build Date of the BroadShield software. Periodic
updates are released with NetClock system software updates, as they become available.
Monitoring BroadShield
You can use the BroadShield Web UI to monitor the jamming/spoofing status, or the NetClock
Web UI. In the latter case, you will be informed of a Major Alarm, as described below:
BroadShield Alarm
If BroadShield detects a jamming or spoofing event, NetClock will emit a
BroadShield Crit
ical, Major Alarm
(see illustration below). NetClock will go into Holdover ( yellow HOLD status
light) and – depending on the BroadShield Service setting (see "Enabling/Disabling the
BroadShield Service" on page 175) and your NetClock settings – will either remain in sync
(
green SYNC status light), i.e. it will continue to output time and frequency signals considered
valid, or it will go out of sync ( red SYNC light).
You can also configure a notification alarm, see "Enabling/Disabling the BroadShield Ser
vice" on page 175.
BroadShield Web UI Monitoring
The BroadShield Web UI will also display real time signal status information, or a map status.
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NetClock User Reference Guide Rev. 16
3.3 Managing Input References