User's Manual

Screen Service SDT ARK 1 ECHO Operations
Jan, 2012 v 1.ATSC_FCC Page 3 - 38
3.4.7 Network Synchronization parameters setting
Four Network Synchronization modes are available:
 Multi Frequency Network mode using local parameters (MFN):
The transmitter is not synchronized with any network. No input MIP is
needed and Clock Reference can be internal.
 Multi Frequency Network mode using MIP parameters (MFN MIP):
The transmitter is not synchronized with any network but MIP sets the
modulation parameters. Input MIP is needed and Clock Reference can
be internal.
 Single Frequency Network mode (SFN): The transmitter is
synchronized with a Network of transmitters on the same frequency.
MIP is needed and Clock Reference must be external or GPS.
 Single Frequency Network mode using local parameters (SFN
Local): The transmitter is synchronized with a Network of transmitters
but for testing purposes the modulation parameters are set locally.
Input MIP is needed for 1PPS synchronization and Clock Reference
must be external or GPS.
The following table provides a description of the available parameters setting
for the network modes.
Table 8. Network Synchronization parameters setting
Parameters
MFN
SFN
MFN + MIP
SFN Local
Mode
Local
MIP
MIP
Local
Constellation
Local
MIP
MIP
Local
FEC HP
Local
MIP
MIP
Local
FEC LP
Local
MIP
MIP
Local
Transmission
Local
MIP
MIP
Local
Time Slicing
HP
Local
MIP
MIP
Local
Time Slicing
LP
Local
MIP
MIP
Local
Guard Time
Local
MIP
MIP
Local
BW
Local
MIP
MIP
Local
Alpha
Local
MIP
MIP
Local
Input HP
Local
Local
Local
Local
Input LP
Local
Local
Local
Local
Interleaver
Local (for 8k
mode only native)
MIP
MIP
Local (for 8k
mode only
native)
MPE FEC HP
Local
MIP
MIP
Local
MPE FEC LP
Local
MIP
MIP
Local
Cell Id enable
Local
Local
Local
Local
Cell Id
Local (only if
enabled)
MIP or Local
(only if enabled)
Function from MIP
can be enabled or
disabled
MIP or Local
(only if enabled)
Function from MIP
can be enabled or
disabled
Local (only if
enabled)
Frequency
Offset
Local
MIP or Local
(only if enabled)
Function from MIP
can be enabled or
disabled
MIP or Local
(only if enabled)
Function from MIP
can be enabled or
disabled
Local