Parameter Values Description
user-defined symbol rate setting.
When rate adaptation is disabled, the modulator card tries to
lock its symbol rate to the input data rate, but it can only do so
if the configured input data rate is within the tracking range of
the input rate control PLL (approximately ±122 ppm). If this
does not match, errors will be seen at the output.
Input Buffer Size 512 bytes to 4096 bytes The size of the input buffer.
Clock Reference
Mode
Internal, External
The source of the 10 MHz reference clock used by the satellite
modulator. External mode is not supported by the current
hardware configuration.
RAS Scrambling Off, On Specifies whether to use RAS scrambling.
RAS Key The 7-byte key used for RAS scrambling.
RAS version
The version of the RAS implemented on the satellite
modulator.
5.4.4.7.3 Satellite Modulator Modulation Configuration
The following parameters are available through the Advanced Setup tab of the
Device Configuration page under Slots > Slot <n> - Satellite Modulator Option
Card > Satellite Modulator > Modulation Parameters or on the Modulation
Parameters tab in the Properties widget of the Service Configuration page if one
of the Satellite Modulator Output Stream is selected in the Outputs widget. The
same parameters can be accessed through the Advanced/Satellite
Modulator/Modulation Parameters menu on the front panel.
Table 5.9 Satellite Modulator Modulation Configuration Parameters
Parameter Values Description
Modulation Standard DVB-S, DVB-DSNG, DVB-S2, DVB-S2X
Specifies the modulation standard to use for satellite
transmission.
Modulation State Off, On
Turns on or off the modulation of the carrier. If the output is
enabled and modulation is turned off, an unmodulated
carrier is output.
Stream
Synchronization
Mode
1
Disabled, Short, Normal
Specifies whether to transmit ISSY and if so, whether to use
a two or three-byte ISSY field in the BB header.
Stream
Synchronization
Mode
1
for TS2
Disabled, Short, Normal Same as above for the 2nd Transport Stream in VCM mode.
Null Packet Deletion
1
Off, On
If set to On, null packets will be deleted from the incoming
Transport Stream.
FEC Rate
1/4
1,4
, 1/3
1,4
, 2/5
1,4
, 1/2, 3/5
1,4
, 2/3, 3/4, 4/5
1,4
,
5/6, 7/8
2,3
, 8/9
1,4
, 9/10
1,4
, 13/45
,4
, 9/20
,4
,
8/15
,4
, 11/20
,4
, 5/9
,4
, 26/45
,4
, 28/45
,4
, 23/36
,4
,
25/36
,4
, 32/45
,4
, 13/18
,4
, 11/15
,4
, 7/9
,4
, 77/90
,4
The code rate of the Reed-Solomon encoder (DVB-S and
DVB-DSNG mode) or the BCH – LDPC encoder (DVB-S2
and DVB-S2X mode)
FEC Rate for TS2
1/4
1
, 1/3
1
, 2/5
1
, 1/2, 3/5
1
, 2/3, 3/4, 4/5
1
, 5/6,
7/8
2,3
, 8/9
1,2
, 9/10
1
Same as above for the 2nd Transport Stream in VCM mode.
Frame Size
1,4
Normal, Short The size of the BB frames in DVB-S2 mode.
Frame Size
1
for TS2 Normal, Short Same as above for the 2nd Transport Stream in VCM mode.
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