Conditional Access
2/1553-FGC 101 1014 Uen B
D-32
Figure D.20 Three Different Scrambling Situations
Scrambling Situation A with shared ECMs. Components 1 and 2 are scrambled with
both ECMs 1 and 2.
Scrambling Situation B without shared ECMs. Component 3 is scrambled with
ECM 3.
Scrambling Situation C with shared ECMs. Components 4 and 5 are scrambled with
ECM 4.
Usually, the operator tries to minimize the number of ECMs in use, as most ECM
generators can generate only a limited number of ECMs and ECM generators are
expensive.
The multiplexer cannot start to scramble a component with a control word before it
has received all the ECMs belonging to the Scrambling Control Group, since the
ECMs must be received by the Decoder within a certain time window. The more
ECMs there are in one Scrambling Control Group. the more time the Multiplexer will
have to spend synchronizing the ECMs.
The multiplexer can handle up to a maximum of 1024 different SCG IDs and a
maximum of eight simulcrypted ECM streams per SCG ID.
Summary of Contents for MX8400
Page 1: ...MX8400 Multiplexer Software Version 5 2 0 and later REFERENCE GUIDE 2 1553 FGC 101 1014 Uen B...
Page 26: ...Installing and Powering Up 2 1553 FGC 101 1014 Uen B 2 4 BLANK...
Page 94: ...Operating the Multiplexer using nCompass Control 2 1553 FGC 101 1014 Uen B 4 18 BLANK...
Page 96: ...Preventive Maintenance and Fault finding 2 1553 FGC 101 1014 Uen B 5 2 BLANK...
Page 146: ...Technical Specification 2 1553 FGC 101 1014 Uen B B 20 BLANK...
Page 148: ...Static Parameters 2 1553 FGC 101 1014 Uen B C 2 BLANK...
Page 186: ...Redundancy Modes 2 1553 FGC 101 1014 Uen B E 2 BLANK...
Page 192: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 2 BLANK...
Page 196: ...IP Protocols 2 1553 FGC 101 1014 Uen B F 6 Figure F 3 Editing Stack Download Ports...
Page 198: ...ProMPEG FEC Support for IP Streaming 2 1553 FGC 101 1014 Uen B G 2 BLANK...
Page 204: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 2 BLANK...
Page 212: ...Setting up the SFN Functionality 2 1553 FGC 101 1014 Uen B H 10 BLANK...
Page 214: ...PSIG Support 2 1553 FGC 101 1014 Uen B I 2 BLANK...
Page 220: ...BISS Support 2 1553 FGC 101 1014 Uen B J 2 BLANK...