Televes 5079, User Manual

Page: 50 / 72

4. - ELEMENT DESCRIPTION
4.1.- QPSK-PAL
PRGM
PWR
A/V
QPSK-PAL
CTRL
1
2
3
4
5
6
7
9
8
The QPSK-PAL transmodulator turns a TV
or radio channel (chosen by the user) from
the existing channels in a satellite
transponder (QPSK modulation and an
approximate bandwidth of 36 MHz) into a
VHF/UHF channel (PAL modulation and a
bandwidth of 7/8 MHz).
To do this, the unit carries out the QPSK
demodulation of the input channel
(transponder), thereby obtaining an MPEG-2
TS signal (MPEG-2 transport stream) to
carry out the subsequent modulation
(according to the standard) of the audio and
video signals of the selected program in any
channel or frequency between 46 and 862
MHz.
The selection of the input channel, input and
output signal parameters, output channel,
output level, types of audio, and output
channel tables is carried out via the
programmer ref. 7234, that is connected to
the front of the device.
It is also possible to control the unit from a
PC as explained in section 6.
The QPSK-PAL transmodulator disposes of
an IF input and output in the upper “F”
connectors with the aim of facilitating the
passing of the input signal to various
modules, it also allows the powering of a
converter via the IF input (13V or 18V), as
well as being able to generate a 22 KHz tone
for the selection of the converter's oscillator
by the said connector.
It also has an RF input and output so as to
be able to mix the channels for their
subsequent amplification.
-
-
-
-
-
-
-
-
(1)
GND -1
Video Out -2
Audio R Out -3
Audio L Out -4
-5
-6
-7
-8
1.- IF Input +V
LNB
/ 22KHz
2.- IF Output
3.- RF Input
4.- RF Output
5.- A/V Output
(1)
6.- Programmer
7.- Powering input
8.- LED on
9.- Control BUS connector
Note down the device’s
address in the Headend
Control (001 ... 254)
Product reference
Indicate the programmed
output channel
QPSK-PAL
5079
Ch
50
User manual QPSK-PAL