6.2.10 Edit->Unit->Alarms Screen
The Edit->Unit->Alarms screen is shown in Figure 6-15.
Figure 6-15 Edit->Unit->Alarms Screen
6.2.10.1 LinkGuard™ Interference
LinkGuard™ is a Paradise patented technology (US patent 8351495) for detecting in-
band interference underneath satellite carriers while remaining on traffic.
An automated alarm can be generated whenever the power spectral density of the
interference goes above a user-set threshold, thereby automatically alerting the operator
whenever meangingful levels of interference are detected. This threshold check is
enabled and disabled via the LinkGuard interference over-threshold check control. The
threshold level setting itself is described in Table 6-41.
Range: 0dB to 9.9dB; step size: 0.1dB
Description: Sets a power spectral density threshold used to monitor for any signal
under the received carrier. If the detected level of interference exceeds
the threshold then an Rx traffic warning alarm is raised. See Section 7.6
for more information on LinkGuard™.
Table 6-41 LinkGuard™ Interferer Threshold
6.2.10.2 Tx/Rx AIS Alarm Action
These control the action taken with respect to Alarm Indication Signal (AIS) detection,
commonly used in G.703 circuits. It is a sequence of ‘all ones’ that replaces the normal
data stream when a failure is detected, in order to alert downstream equipment of the
failure.
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