Comtech EF Data DTMX5000 SpectraCast - Manual (Page 50)

Operation DTMX5000 IP Gateway
Rev. 1 3–14
3.2.4 DVB Mapping Parameters
Digital Video Broadcasting (DVB) Mapping is a method of mapping IP packets onto an
MPEG2 transport stream. The DVB Mapping Parameters menu contains editable
parameters. These enable the DTMX5000 to operate as a fully DVB compatible system,
allowing it to be used for both SCPC and MCPC applications.
Output Bit Rate Specifies the total output bit rate of the unit.
PAT Rate Specifies the rate, in tables per second, at which the Program Association
Table (PAT) packets will be sent.
PMT Rate Specifies the rate, in tables per second, at which each Program Map Table
(PMT) will be sent. The PMT defines the various PIDs of which a program is
made.
Framing Type Specifies what kind of framing (188, 204) to be used for the MPEG2
Transport Stream.
Stuffing Mode Specifies the type of stuffing to be used to fill the remaining unused parts of
an incomplete 188-byte MPEG packet.
MPE Mode Defines the mode in which MPE operates, either packed or nonpacked.
CRC Mode Specifies the way in which data integrity is checked.
Clock Polarity Specifies the output polarity of the clock signal on the parallel LVDS
interface, which may be inverted.
Auxiliary Input Specifies whether the AUX Transport Stream input is enabled.
Auxiliary Null Packets Specifies how the transport Stream from the AUX input will be combined
with the output Transport Stream.
Auxiliary Input Type Specifies which unit input would be used by the AUX input.
LLC-SNAP Enables or disables the LLC-SNAP header.