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CW-4142 QPSK DEMODULATOR
Therefore with such modules, when pushing STORE,
one service should be selected only, or the display
should read the name of the service, which is
descrambled.
SELECT AUDIO
This menu item permits selecting the desired sound
channel when receiving programs with more than
one audio channel (e.g. multilingual transmissions).
The availability of more than one sound channel is
indicated by the ← → mark.
The desired sound channel is then selected with
and
, and can be stored with the STORE button.
After store, the PID of the selected sound channel
is displayed and there is no more possibility to
select, what is indicated by the disappearance of
the ← → mark.
AUDIO LEVEL
Adjustable range: 0 ... 13
AUDIO
With
the
amplitude of the output audio signal (L, R) can be
adjusted. The audio amplitude is increasing with the
scale numbers. At the value of 0 the audio signal is
switched
off.
Factory
corresponds to a medium volume.
DECRYPTED PROGRAMS
In this menu item the list of the programs having
been selected to descrambling is shown. The
and
buttons permit stepping forward and
backward in the list. The ← and → characters in the
display show the direction in which further list
elements can be found.
5. Ajustable and query only
parameters in the extended menu
In the extended menu some further menu items
appear among the items of the normal menu:
Factory settings:
In this menu item, by pushing the RECALL button,
the factory settings can be retrieved, which are
following: ASTRA 19.2 ° , 11778 MHz, vertical
polarization, 27.5 Ms/s, CNN International.
Satellite parameters:
SNR: 5 ... 20 dB
(Signal to noise ratio)
VCR: 1/2, 2/3, 3/4, 5/6, 7/8
(Internal error correction code ratio)
CORR.RS.ERR: 0 ... 65535
(Number of the correctable RS errors)
The above parameters provide the user with
following information:
− With no input satellite signal the SNR value is
less than 5 dB. For a reliable reception
approximately 10 dB should be assured. (Use
an antenna of adequate size!)
LEVEL
parameter
setting
is
7,
which
− The VCR parameter shows the value peculiar to
the internal (Viterbi) error correction coding of the
transport stream. The unit automatically searches
this parameter; it cannot be set manually.
− The CORR.RS.ERR
total number of the Reed-Solomon errors in the
packets having occurred since the appearance
of the DEMOD LOCKED state. The correctable
errors do not cause visible deterioration of the
picture. This parameter shows the reception
quality in an indirect way. In case of reliable
reception (with proper input level even at
adverse weather conditions) the correctable RS
errors are stable at zero.
The displayed value can be reset with pushing
the
or
This menu item indicates the video packet identifier
of the selected program. This PID enables the
the
demodulator to extract the concerning video signal
packets from the transport stream.
The Video PID is searched and set automatically
and cannot be set manually.
The PCR (Program Cock Reference) PID indicates
the clock reference of the received program. These
packets serve for the synchronisation of the
demodulator's clock generator. The value of the PCR
PID often is identical with that of the Video PID.
The PCR PID is searched and set automatically
and cannot be set manually.
TELETEXT PID NUMBER
In this menu item the identifier of the teletext
packets belonging to the received program is
indicated.
The Teletext PID is searched and set automatically
and cannot be set manually.
In this menu item the PID of the sound track of the
received TV program or of an independent radio
program is displayed. This PID enables the
demodulator to extract the concerning sound
packets.
The Audio PID is searched and set automatically
and cannot be set manually.
This menu item indicates the mode of the received
audio channel: mono, stereo, dual etc., and cannot
be set.
Audio parameters:
AU.SMPL.FR.:
(Audio sampling frequency)
AU.BIT RATE:
(Audio bit rate).
5
parameter shows the
button.
VIDEO PID NUMBER
PCR PID NUMBER
AUDIO PID NUMBER
AUDIO MODE
0 ... 48000 Hz
0 ... 448 Kb/s
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