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2.3 Description
This particular module has a QPSK AV converter which simultaneously converts
four QPSK modulated channels into AV signals using two SAT tuners. It is addition-
ally equipped with a common interface module, which enables the reception of
up to 2 encoded channels through a single data stream when used in conjunction
with a CA module and a smart card from a service provider.
The module has two SAT inputs and one AV interface, through which the de-
coded video and audio signals are fed to the corresponding modulator mod-
ule. Components (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. The following table shows the
allocation of the selectable number of channels to the tuners:
Tuner “A”
Tuner “D”
Number of
channels
3
1
2
2
For example, if three channels from tuner “A” will be used, one channel from
tuner “D” can be used. If two channels from tuner “A” will be used, two chan-
nels from tuner “D” can also be used.
Signal transfer principle:
TUNER A
TUNER D
LINE A
LINE B
LINE C
LINE D
CA module
TUNER A
TUNER D
LINE A
LINE B
LINE C
LINE D
CA module
