Operation instructions | SKT 40-00 | SKT 80-00 | 8PSK/QPSK | COFDM Quattro/Octo Module
4
2016-01-11 | © AXING AG Switzerland | Subject to change in design and type; errors and misprints reserved
1. Product description
1.1.
General
SKT 40-00 – Conversion of four QPSK/8PSK modulated SAT IF signals in COFDM.
SKT 80-00 – Conversion of eight QPSK/8PSK modulated SAT IF signals in COFDM.
Thanks to the implementation of the FPGA technology, you get an excellent signal quality with exceptional
MER values.
1.2.
Delivery includes:
1 × SKT 40-00 8PSK/QPSK | COFDM quattro module or SKT 80-00 8PSK/QPSK | COFDM octo module
1 × DC connection cable SKZ 40-00
1 × Quick start guide
Note
: The power supply unit and the basic unit are not included in the scope of delivery of the SKT 40-00 and
SKT 80-00 modules
.
They are available as an option. It is recommended to install the modules into a base unit.
1.3.
Inputs/tuners
The quattro module SKT 40-00 includes four independent DVB-S/S2 tuners and the octo module SKT 80-00
includes eight of them.
On the SAT-IF input the headend modules have a remote supply voltage for the LNB and use DiSEqC 1.0
functionalities.
Therefore, they can be connected directly to the LNB.
Optionally, you can also use conventional multi-switches as input distributors. The advantage of this solution is
that you can set both the SAT IF level and the satellite via the user interface. Changes in the list of programs
can be made using remote maintenance, so that it is not necessary to change or modify the input distribution
on site.
The selection of the transponder and the demodulation of the QPSK/8PSK modulated signal are both made in
the tuner. After the demodulation, a parallel data flow is output.
If needed, the programs from the data flow of the demodulated transponder can be filtered and bundled again
(Remux procedure).
Thanks to the Cross Multiplex procedure, FTA programs can be filtered from the data flow of several tuners for
a common output channel and be bundled again. The prepared data flow is passed on to the modulators.
1.4.
Output/modulators
The
SKT 40-00
has four COFDM output modulators.
The first modulator can be set to any output channel between 114 and 1,006 MHz. The other three modulators
are automatically set by incrementing the output channels in accordance with the chosen channel spacing.
For example: (Modulator 1: S21) – (modulators 2; 3; 4: S22; S23; S24)
The output channels of the four modulators must be neighbor channels and have the same HF
output.
The
SKT 80-00
has eight COFDM output modulators. They are subdivided in two modulator groups of four
modulators each.
In both groups, the first modulator can be set to any output channel between 114 and 1,006 MHz. The next
three modulators of both modulator groups are automatically set by incrementing the output channels in
accordance with the chosen channel spacing.
