Televes T.0X Series, User Manual

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TWIN QPSK - PAL CI
10
The unit allows access to scrambled services by
using a conditional access module (CAM) that
performs the service’s descrambling.
Descrambling is only allowed for the module B.
The selection of parameters (input frequency, SR,
output level, output frequency, ...) is performed by
using the programmer ref. 7234, which is plugged
in its own socket on the front of the unit.
It is also possible to control the unit from a PC as
described in Section 6.
The normal operation of modules is as follows:
- Module A : All changes are made and/or
previewed in real time, except for some cases to be
discussed in the corresponding section.
- Module B : To make and/or preview changes in
real time, you have to save them (long press on key
key), except for some cases to be discussed in the
corresponding section.
The TWIN QPSK-PAL CI unit allows the user
trasmodulate two channels (TV or radio) selected
from those in two satellite transponders in the
same band and polarisation, into two VHF/UHF PAL
channels, with the possibility of stereo modulation.
To do this, the unit demodulates the two QPSK
input channels (transponders) to obtain the
MPEG-2 TS signal (Transport Stream MPEG-2)
for each of the input channels to carry out the
subsequent modulation of both audio and video
signals of the selected program, to any channel or
frequency between 46 and 862MHz.
The TWIN QPSK-PAL CI unit features:
- An IF loop-through for the input connectors on
the top of its front, in order to enable the passage
of the input signal to other modules. On the other
hand, allows current by-pass through the IF input
cable (13 or 17 Vdc) to power the LNB as well as to
generate and send out a 22KHz tone through this
input to select the LNB oscillator.
- A RF loop-through for the output connectors
on the bottom of its front, in order to mix the
channels for further amplifi cation.
- A slot for inserting a conditional access module
(CAM) for the module B of the TWIN unit.
- Two 2.5 mm jack connectors used to connect the
headend controller CDC T-0X via a control BUS.
- Two 3.5 mm jack connectors that make available
in baseband the two audio & video channels of
each module.
4. Elements description
4.1. Introduction