Signal to noise ratio check:
If enabled an alarm will be raised provided that the SNR measured
is below the threshold value associated with the stream. Only
relevant for RF signals.
Signal strength check:
If enabled an alarm will be raised provided that the signal level
measured is below the minimum signal strength threshold value
or above the maximum signal strength threshold value associated
with the stream. Only relevant for RF signals.
SFN measurement check:
Enable or disable alarming of SFN drift errors. Only relevant for
ASI and DVB-T/T2 signals.
SFN measurement check –
Monitor SFN Drift,
max drift (µs):
Check the Monitor SFN Drift box to enable SFN drift monitoring,
and set the drift alarm threshold. Default: disabled and 10 µs.
SFN measurement check –
Drift zero adjust (µs):
SFN drift zero adjustment to compensate for delays in transmitter
and receiver equipment. When an optimal system is configured the
Drift zero adjust figure should be set to yield an SFN drift figure of
zero in the COFDM — Status view.
Center frequency check:
Enable or disable alarming of center frequency inaccuracy with
reference to the threshold setting. Only relevant for RF signals.
Symbol Rate check:
Enable or disable alarming of symbol rate inaccuracy with reference
to the threshold setting. Only relevant for RF signals.
Packet error count check:
Enable or disable alarming when there are erroneous packets after
FEC. Only relevant for DVB-S/S2 RF signals.
Post BCH frame
error rate check:
Enable or disable alarming for when the frame error rate after BCH
is above threshold. Only relevant for DVB-T/T2 RF signals.
T2MI check:
Enable or disable alarming for the T2MI related errors. Only relevant
for T2MI streams.
T2MI check –
Expected PLPs
Set the list of PLP IDs which are expected in the stream. If any
of the listed PLPs are missing an alarm will be raised. Similarly, if
PLPs not listed in the template are present then an alarm will be
raised.
T2MI check –
Expected T2 Timestamp
Set the T2 timestamp type required to be present in the stream. An
alarm will be raised if this is incorrect. Set to ‘Any type’ to disable
the check.
Eb/N0:
Enable or disable alarming when the Eb/N0 measurement is lower
than the threshold set in the RF template. Only relevant for DVB-
S/S2 RF signals.
EVM:
Enable or disable alarming when the Error Vector Magnitude is
higher than the threshold set in the RF template. Only relevant for
DVB-S/S2 RF signals.
VB2xx GigE User’s Manual version 5.4 163
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