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CGS 470
2.4 d
esCription
The module CGS 470, in the following called digital module, has a QPSK AV
converter which simultaneously converts four QPSK modulated channels into AV
signals using two SAT tuners. It is additionally equipped with a common inter-
face, which enables the descrambling of up to 4 scrambled channels through a
single data stream when used in conjunction with a CA module and an appropri-
ate smart card from a service provider.
The digital module has two SAT inputs and one AV interface, through which the
decoded AV signals are fed to the corresponding modulator module. Compo-
nents (e.g. LNB) which are connected upstream can be powered through the
SAT inputs.
The channel strips "
A
" "
B
", "
C
" and "
D
" can be individually programmed. This
means it is possible to select up to 4 channels from two transponders. Via
tuner "
A
" scrambled and unscrambled channels can be received. Tuner "
D
" is
prepared to receive unscrambled channels only.
The following tables show the possible allocations of the selectable number of
channels to the tuners.
For example, if three unscrambled channels from tuner "
A
" will be used, one
unscrambled channel from tuner "
D
" can be used. If , e.g. two unscrambled
channels from tuner "
A
" will be used, two unscrambled channels from tuner
"
D
" can be used.
Tuner "A"
Tuner "D"
Quantity of unen-
crypted channels
3
1
2
2
1
3
For example, if four scrambled channels from tuner "
A
" will be used, no chan-
nel from tuner "
D
" can be used. If , e.g. two scrambled channels from tuner
"
A
" will be used, two unscrambled channels from tuner "
D
" can be used.
Tuner "A"
(encrypted
channels)
Tuner "D"
(unencrypted
channels)
Quantity of
channels
4
0
3
1
2
2
1
3