TANDBERG Voyager E5784, Справочное руководство

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Operating the Equipment Locally: Mux Menu
Page 4-122 Reference Guide: Voyager E5784 and E5788 HD DSNG Encoder
ST.RE.E10137.3
Table 4.149: Scramble Options (RAS)
Selected Option Description
Off Encoder output is not scrambled.
RAS (Fixed 1) Encoder output is scrambled using the fixed RAS key assigned by TANDBERG TV,
and preprogrammed into the Encoder.
RAS (Fixed 2) Encoder output is scrambled using the fixed second RAS key assigned by
TANDBERG TV, and preprogrammed into the Encoder.
RAS (EBU Key) Encoder output is scrambled using the fixed RAS key assigned to the EBU and
preprogrammed into the Encoder.
RAS1 (SNG Key) Encoder output is scrambled. Scrambling key used is entered using the SNG Key
(RAS1) option.
NOTE…
RAS Fixed Keys and the EBU Key are only programmed into the Encoder if requested when the units
are ordered.
SNG Key (RAS1) Option
This option enables the scrambling key used in SNG Key scrambling mode
to be set (see the Scramble option). The same scrambling code must be
used at the receive end to unscramble the transmission.
Enter up to seven digits using the keypad, then press the Enter softkey to
accept the scrambling code. If less then seven digits are entered, they are
prefixed with 0’s (zero) to give a seven-digit code.
4.10.14 BISS Options Enabled
Overview
BISS Mode 1 uses a fixed scrambling key, known as the Session Word, to
encrypt the transport stream. The same Session Word must be entered in
the Receivers and the Encoder to enable the transport stream to be
decrypted.
BISS-E adds an extra layer of security, as a unique key is required for each
Encoder and Receiver. This is known as the Encrypted Session Word. Each
Encoder and Receiver is assigned a unique BISS Injected ID, which should
not be made generally known, and which cannot be read from the unit.
For a particular transmission a BISS Session Word is chosen, and then
encrypted, using each unit’s BISS Injected ID to produce an Encrypted
Session Word for each unit. This means that if an unauthorised person
obtains an Encrypted Session Word, it is useless unless they also know the
BISS Injected ID for the unit that the Encrypted Session Word was
intended.