TANDBERG E5780, Справочное руководство

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Options and Upgrades
Page 3-8 Reference Guide: evolution 5000 E5780 and E5782 Encoder
ST.RE.E10135.4
3.2 Basic Interoperable Scrambling System - BISS
(M2/EDCOM2/BISS)
With the appropriate configuration, the Encoder can use the Basic Interoperable Scrambling
System (BISS
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) to scramble the outgoing transport stream. This system has been developed
by the European Broadcasting Union (EBU) as an open scrambling system.
BISS has three main levels of operation: Mode 1, Mode 2 and Mode 3. Mode 0 corresponds to
no scrambling. BISS-E is also available.
BISS Mode 1 operation uses a fixed value for the control word to scramble the services in the
transport stream from the Encoder. To descramble the transmission, the Decoder needs to
have the matching control word value.
The BISS Module (M2/EDCOM2/BISS) comprises Assembly S12284 and Card S11484.
NOTES…
1. This option module is installed as a daughter card to the Base Board, with no external
connectors and does not use an option slot.
2. The BISS software must also be enabled in the Encoder (see Customer Services).
BISS scrambling (when fitted) is enabled and controlled via the
Setup/Mux Menu
(see
Chapter 4, Operating the Equipment Locally, Section 4.9 ).
3.3 Additional Audio and Linear PCM Option
(M2/EOM2/AUDLIN2)
3.3.1 Overview
The Additional Audio option module supplements the audio encoding functionality of the
Encoder. This module supports audio standards MPEG-1 (layer 2), Dolby Digital (AC-3),
Linear PCM, Dolby Digital (AC-3) Pass-through, Dolby E Pass-through and DTS Pass-
through. The module can take in audio as either stereo analogue or digital AES/EBU (on left
channel only) via a 15-way D-type connector provided on its rear panel.
Alternatively, any two of the four pairs of embedded AES/EBU channels extracted from the
video can be routed to the module for encoding. This option supports all the standard bitrates
and encoding modes associated with each compression standard.
M2/EOM2/AUDLIN2 supports 12 dB, 15 dB, 18 dB and 24 dB audio clip level.
The
Audio Menu
associated with this option is described in Chapter 4, Operating the
Equipment Locally, Section 4.7.5 . In the
Audio Setup Menu
additional options are
displayed for Audio XA and Audio XB, where X is the option slot number where the module is
fitted.
Refer to Annex F, Audio Modes for details of Encoder locking to ensure correct performance.
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BISS is implemented according to EBU Tech 3292 May 2002.