Sencore VB200-DC User Manual

For ASI input the relevant monitoring views are Alarms, ETR 290 and ASI — Status.
For demodulator inputs the relevant monitoring views are Alarms , ETR 290 and COFDM/QAM/VSB/RF/
SAT — Status.
Ethernet monitoring hints are found in B Appendix: Monitoring Practices.
5.4 Adjusting Alarm Thresholds
When the probe inputs and streams have been defined using default thresholds, the result will usually
be a number of more or less permanent alarms, some which may not be relevant under the current
circumstances. In order for the user to get rid of unwanted alarms, the probe provides alarm filtering
functionality in the form of alarm thresholds and alarm on/off selection.
Multicasts
By default Ethernet thresholds are set to raise alarms when service affecting errors occur, that are
caused by the network. There may however be reasons for these thresholds to be altered, for instance to
reflect receiver robustness in the case of IAT, or to reflect a TS into IP mapping different from the default
(7TS/UDP). Creating a new threshold template is done either by copying an existing one and altering the
copy, or by creating a new threshold template from scratch. The Ethernet thresholds are defined in the
Multicasts — Ethernet thresh. view. These thresholds are associated with streams in the Multicasts
— Streams view.
In addition to the miscellaneous thresholds, that affect only the streams with which they are associated,
the Alarm — Alarm setup view allows the user to enable and disable alarms on an overall basis. It is
also possible to define the alarm severity levels for different alarms in this view.
OTT
When an OTT channel is defined the default OTT threshold template is assigned to it. To change
threshold values create one or more new templates in the OTT — Thresholds view and assign them to
OTT channels in the OTT — Channels — Edit view.
ETR 290
By default the streams configured in the probe will be set up to use the ETR 290 threshold named Default .
This has the most important alarms enabled but have been adjusted to match real world systems and
only alarm on more severe problems. The threshold named ETSI TR 101 290 is based on the ETSI TR
101 290 guidelines and are fairly strict generating more alarms. The ETR 290 thresholds should be
changed if there are tables that are not relevant for a system, or if the user requires alarm functionality
that exceeds the ETR 290 guidelines. The ETR engines has a lot of powerful functionality not enabled by
default, for instance the ability to raise alarms if the number of services present in a signal is lower than a
preset limit.
The default PID and service thresholds do not affect alarming at all, they are completely transparent. The
thresholds may be altered for instance in order to mask an alarm generated by an unreferenced PID or to
ensure an alarm is raised if a service or PID bitrate is outside preset limits.
VB2xx GigE User’s Manual version 5.4 41

Sencore VB200-DC Specifications

General

Brand	Sencore
Model	VB200-DC
Category	Network Hardware
Language	English