THOMSON Amethyst III, User Manual, Page: 138 / 306

Chapter 3 ’Web Browser Interface’ — Interface Description
138 Amethyst III DTV Smart Switch
User Manual
Tests Parameters
In the right part of the Tests view, the Parameters frame displays a short
description and a list of parameters to set for each test.
TR 101 290 Level 1 Tests (DVB/ATSC)
TR 101-290 Level 1 is a basic set of parameters that are considered
necessary to ensure that the TS can be decoded.
All tests of TR 101-290 level 1 are supported.
Available in AMETH3-LIC-SWITCH-STD.
Table 3-9. TR 101 290 Level 1 Tests
Format Persistence
Test Description
AS
I
31
0
M
Gi
g
E
O
p
tion
al/M
andator
y
D
u
ra
tion
U
pper threshold
Lo
w
e
r t
h
re
shold
Configuration of TR 101 290 Level 1 Tests
TS Sync Loss (1.1) This test checks TS synchronization.
It cannot be disabled, and its severity is always Critical.
Synchronization loss is detected when:

No data was detected for a given amount of time:
the input is plugged but no data is received. Set
this amount of time:

In the No data detected for field, in
microseconds (applicable to ASI and
SMPTE 310M).

In the No IP datagram detected for field, in
milliseconds (applicable to Gigabit Ethernet).

Percentage of erroneous symbols is too high: the
input may be unplugged. Set this value in the
Maximum ASI coding violation rate field
(applicable to ASI only).

The number of consecutive unsynchronized
Transport Packets has reached a given threshold.
Set this threshold in the
Number of
unsynchronized packets field (applicable to ASI,
SMPTE 310M, Gigabit Ethernet).
When the input is unsynchronized, the other tests are
not performed.
When
persistence duration is configured, the alarm
remains raised for a given amount of time after
synchronization. During this probation period, the other
tests are performed, however, associated alarms are not
raised. They will be raised as soon as the
synchronization alarm disappears, if they are still
present.
See
description.
O

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