Comtech EF Data DD240XR Rev Е - Manual (Page 31)

DD240XR High-Speed Digital Demodulator User Interfaces
MN-DD240XR – Rev. E 4-11
Multicast Destination IP Addresses
When the destination address is a Multicast address
(224 000.000.000 thru 255.255.255.255) the Ethernet Data Interface will construct the
appropriate Destination Multicast MAC address based upon the Destination Multicast
IP Address. The Ethernet Data Interface will then transmit multicast data packets to
the destination without performing any other handshaking or IGMP message
processing.
BLOCK ALIGNED: {YES or NO]
This menu is only visible when COP 3 RTP FEC is
selected.
Yes: selects block aligned Column FEC.
No: selects non-block aligned Column FEC. Each
column is offset by 1, as illustrated in Informative Annex
A of COP 3 release 2.
FEC COLUMN L {X}
This menu is only visible when COP 3 RTP FEC is
selected.
This selects the number of columns used by the FEC
calculation.
FEC COLUMN D {X}
This menu is only visible when COP 3 RTP FEC is
selected.
This selects the number of rows used by the FEC
calculation.
Constraints on L and D values
L and D have the following constraints
4 <= L <= 20
4 <= D <= 20
L * D <= 100