Ericsson RX1290 用户手册

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页码 176
Operating the Equipment Locally 
 
 
3.8.2 
Basic Interoperable Scrambling System (BISS) (Menu 4.4) 
BISS Mode 1 is similar to RAS in that it uses a fixed control word to encrypt the data 
in the transport stream. Unlike RAS, the scrambling algorithm is non-proprietary, 
using the DVB Common Scrambling Algorithm to allow interoperability with other 
manufacturers’ encoding/scrambling equipment. 
3.8.3 
Remote Authorization System (RAS) (Menu 4.1) 
RAS has two levels of operation: FIXED KEY MODE and DSNG KEY MODE. 
FIXED KEY MODE has a fixed control word to encrypt the data in the transport 
stream.  
DSNG KEY MODE is used for fixed headend systems. Its main functionality is: 
•  Over-air addressing of Receivers for authorization/de-authorization to decrypt 
the transmission. 
•  Group operation for authorization/de-authorization. 
•  Periodic control word changes during transmission. 
3.8.4 
Director (Menu 4.3) 
Director functionality includes Conditional Access, over-air software download and 
over-air control. 
No specific set-up is required in the Multi-Format Receiver for the Conditional 
Access or software download. For over-air control (NCP) see Chapter 4, Operating 
the Equipment Remotely
3.8.5 
DVB Common Interface (Menu 4.2) 
There is a single slot on the Multi-Format Receiver front panel to allow the insertion 
of a DVB Common Interface (CI) Conditional Access module (CAM) and related 
conditional access card. 
Other than the insertion of the CAM and Access card, no specific set-up is required 
at the Multi-Format Receiver for the DVB Conditional Access, however DVB 
Common Interface functionality is only available if the RX1290/SWO/CI license has 
been installed. 
 
EN/LZT 790 0003/2 R1A
 
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