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Operating the Equipment Locally
Instruction Manual: evolution 5000 E57xx DSNG and DENG Voyager Encoder Page 4-75
ST.TM.E10076.3
If the Hierarchy option is set to Alpha=n, then the FEC (HP) and
FEC (LP) parameters provide two levels of modulation. Transmission
starts with the code rate for the HP level of modulation and ends with the
code rate for the LP level.
The screen for the FEC (LP) option is the same except that (LP) replaces
(HP).
Table 4.78: FEC (HP) and FEC (LP) Options
Selected Option Description
1/2 Terrestrial transmitter FEC rate HP/LP is 1/2.
2/3 Terrestrial transmitter FEC rate HP/LP is 2/3.
3/4 Terrestrial transmitter FEC rate HP/LP is 3/4.
5/6 Terrestrial transmitter FEC rate HP/LP is 5/6.
7/8 Terrestrial transmitter FEC rate HP/LP is 7/8.
Guard Interval Option
To access the Guard Interval option, press the Guard Interval softkey in
the Delivery Descriptor Menu. This enables the guard interval of the
terrestrial transmitter to be specified.
Table 4.79: Guard Interval Options
Selected Option Description
1/4 Terrestrial transmitter guard interval is 1/4.
1/8 Terrestrial transmitter guard interval is 1/8.
1/16 Terrestrial transmitter guard interval is 1/16.
1/32 Terrestrial transmitter guard interval is 1/32.
Carriers Options
To access the Carriers option, press the Carriers softkey in the Delivery
Descriptor Menu. This enables the transmission mode (i.e. number of
carriers in an OFDM frame) used by the terrestrial transmitter to be
specified.
Table 4.80: Carriers Options
Selected Option Description
2k Mode Terrestrial transmitter uses 2k transmission mode
(2k carriers in an OFDM frame).
8k Mode Terrestrial transmitter uses 8k transmission mode
(8k carriers in an OFDM frame).
Other Frequency Option
To access the Other Frequency option, press the Other Frequency
softkey in the Delivery Descriptor Menu. This enables the flag which
specifies whether other frequencies are in use or not to be set.