User guide

IP Protocols
F.1.7 IP Overhead
The IP overhead calculation when mapping MPEG-2 TS packets into IP frames is
shown in Table F.1.
Table F.1 IP Overhead
Overhead factor Comments
MPEG-2 TS 1.0
UDP 1324/1316 = 1.006 (UDP header=8 bytes)
IP 1344/1324 = 1.015 (IP header=20 bytes)
Ethernet 1358/1344 = 1.010 (Eth header=14 bytes)
Total overhead factor becomes: 1.006 x 1.015 x 1.010 = 1.031 or 3.1% overhead.
Note: The number of MPEG-2 TS packets one can map down into each UDP
frame is variable (between 1 and 7). Usually 7 is used for minimum
overhead. This is also used in the above calculation.
F.2 Stack Download Ports
Figure F.3 shows the Editing Stack Download table accessible via Static
Parameters.
Caution!
When using the MX8400 Multiplexer with nCompass Control, set the Port Values to
those shown in Figure F.3.
2/1553-FGC 101 1014 Uen B
F-5