Cisco Model 8656 SSB SEB PAL B G Scrambler Scheda Tecnica

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

• Secures premium video and pay-per-view services with more than 50 

scrambling modes

• Supports 8600

X 

HCT(VBI) and Model 8600 home terminal (Audio) type data 

transactions

• Supports 8600

X

HCT and Model 8600 home terminal messaging, as well as 

interactive viewing guide and virtual channel data transmission for the 8600

X

HCT with 512 kB memory.

• Video scrambling compatible with all new and existing Scientific-Atlanta 

addressable and non-addressable descrambling systems

• Remote control via System Manager 

• Front panel setup and calibration

• Upgradable to SoundProtect audio masking capability

Scientific-Atlanta’s Model 8656-XEU-
AMC Scrambler provides dynamic
switched sync suppression, video
and sync inversion, and high-speed
encrypted data transmission to the
8600

X™

Advanced Analog Home

Communications Terminal (HCT).
The Model 8656 Scrambler also
provides in-band audio data
transmission to Models 8600 and
8590 Home Terminals. The Model
8656-XEU-AMC Scrambler is
upgradable to SoundProtect

™

audio

masking capability.

The Model 8656 Scrambler provides
dynamic switched sync suppression,
video and sync inversion, and drop-
field scrambling. These scrambling
modes can be configured for any
individual mode or a combination
using up to ten pre-defined dynamic
modes. The scrambler is compatible
with all existing Scientific-Atlanta
addressable and non-addressable
home terminals. In addition, the
scrambler is compatible in Jerrold,
Zenith, Hamlin, Eagle, Tocom, and
Pioneer scrambling systems.

The scrambler transmits conditional
access information to the 8600

X

advanced analog HCT using the
vertical blanking interval (VBI) of the
video channel. The 8600

X

HCT trans-

actions are received by the scrambler
at a rate of 153.6 kbps from the Model
8658 Headend Controller (HEC). The
scrambler supports up to ten lines for
VBI data transmission at a rate of 59
transactions per second on a single
VBI line. This provides a total
throughput of 590 transactions per
second on a single channel.
Descrambling information is also
transmitted in the VBI. Descrambling
transactions for the 8600

X

HCT are

encrypted using a random
seed generator and unique
session keys.

The scrambler transmits conditional
access information to the Model 8600
and Model 8590 as AM pulses
modulated on the audio carrier of
various channels in the headend. The
data are interleaved with
descrambling information, providing
a higher degree of security.

The Model 8656 is used to store and
transmit message data for the  8600

X

HCT and Model 8600 Home
Terminal. In addition, the scrambler
provides data delivery for the
interactive viewing guide and virtual
channels to the 8600

X

HCT.

The unit is housed in a standard 19-
inch rack adaptable chassis and fits
any EIA-standard 24-inch rack.

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