DMG 3200/3100/3000 – User Manual
Page 143 (306)
7.3.9 Scrambling
The Scrambling tab handles all aspects of encryption apart for the EMM which is handled by a
separate EMM tab (Section 7.3.2).
Figure 7.29- Scrambling Tab for IP SPTS
Scrambler
The scrambler card to be used for the scrambling of this service
Partial Mode
Defines the percentage of the packets to be scrambled. A service which is
partially scrambled requires less processing capacity for the receivers.
Fixed Key
Enables BISS scrambling Contents of the Scrambling tab will change
accordingly (see figure below) with the ECM section being replaced by the
Control Word section.
Available
ECMs
A list of predefined ECMs – select which ECM to use for the encryption.
Multiple ECMs may be selected but only if they are defined with the same CW,
i.e. they are created with the same SCG_ID.
When an ECM is selected, all ECMs not containing the same CW will be
tagged red, and will not be selectable.
Scrambling
Rules
Specifies which component types to scramble
• all – automatic for all components
• a/v – audio and video only
• a/v/ttxt – audio, video and teletext
• a/v/ttxt/dvbsub – audio, video, teletext, and DVB subtitling
• audio – audio only
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