THOMSON Amethyst III, User Manual, Page: 154 / 306

Chapter 3 ’Web Browser Interface’ — Interface Description
154 Amethyst III DTV Smart Switch
User Manual
T2-MI Tests
T2-MI is a basic set of parameters that are considered necessary to
ensure that the T2-MI switches are seamless and does not cause
modulator reset.
Available in AMETH3-LIC-SWITCH-STD.
Table 3-15. T2-MI tests
Format Persistence
Test Description
AS
I
31
0M
Gi
g
E
O
ptional/M
a
ndator
y
D
u
ra
tion
U
pper threshold
L
o
w
e
r thr
e
s
hold
Presence This test checks that the T2-MI PID is present in the input
transport stream.
A T2-MI stream is considered not present if:
- No T2-MI PID is detected.
- No payload is detected on the T2-MI PID.
- Bad T2-MI structure detected (invalid packet type or
superframe id).
- No new T2-MI packet detected (data but not a new
packet).
This test is mandatory for T2-MI inputs. The error level
is fixed to “critic”.
Note: a PID is not considered a T2-MI PID if no data (or
no T2-MI data) is received during a period equal to the
maximum time possible before the switch to the second
stream.

— — M

— —
Packet count This test checks if there is no discontinuity of T2-MI
packets (based on the packet_count field in the T2-MI
packets header).

— — M

— —
PID continuity counter This test checks if there is no discontinuity of the
Continuity counter on the T2-MI PID.

— — M

— —