STR 6122 TWIN
Allgemeiner T
eil / General Section
GRUNDIG
Service
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Explanation of the possible LNC arrangements
❒
LNC arrangement 1
(one single-range LNC)
Connection of one LNC with one oscillator frequen-
cy (single-range-LNC).
E
x
a
m
p
l
e
:
Reception of programmes of the Astra satellite
only.
❒
LNC arrangement 2
(one universal LNC or 2 single-range LNC’s)
Universal LNC
The 22 kHz signal switches between the two fre-
quency ranges.
–: Oscillator frequency for the lower frequency
range (22 kHz off, i.e. 0 kHz),
~
: Oscillator frequency for the upper frequency
range (22 kHz signal on).
Two single-range LNC’s
The 22 kHz signal can also be used to switch by
means of a 22 kHz switch between two LNC’s (with
one oscillator frequency each). This enables to
switch between the two frequency ranges of two
satellites. See figure at the bottom right on page 16.
❒
LNC arrangement 3 (satellite selection
via Tone Burst (mini-DiSEqC) signal)
Connection possibilities:
1. Two universal LNC’s
A/B: switching between satellite A and B via a Tone
Burst (mini-DiSEqC) switch,
–: oscillator frequency for the lower frequency
range,
~
: oscillator frequency for the upper frequency
range.
See figure at the bottom right on page 17.
2. Up to 4 single-range LNC’s
Connection of a Tone Burst (mini-DiSEqC) switch.
A 22 kHz switch is connected to each of the outputs
of the ToneBurst (mini-DiSEqC) switch.
A(–), A(
~
), B(–), B(
~
) designate the switching pos-
sibilities for the four satellites.
❒
LNC arrangement 4
(many connection possibilities)
With the DiSEqC control system, 22 kHz signals are
emitted which are pulsed in a certain manner and
which contain all the information for the LNC con-
trol system.
The DiSEqC signal (DiSEQC 1.0) is output at first,
then in addition the Tone Burst (mini-DiSEqC) sig-
nal and the static 22 kHz Signal. This results in
many connection possibilities.
You must enter the respective LNC oscillator fre-
quency in the “LNC Setup” menu for every connec-
tion possibility you wish to use.
1. DiSEqC switch (up to 4 satellites)
A DiSEqC switch provides you with all connection
possibilities.
Satellite selection:
A, B, C, D (for up to 4 satellites).
Frequency range selection:
–: lower frequency range.
~
: upper frequency range.
Example
Reception of the lower and upper frequency range
of two satellites (see figure at the bottom right on
page 17). In this case, the desired polarization is
also selected with the DiSEqC signal.
2. Tone Burst (mini-DiSEqC) switch
(2 satellites)
ToneBurst (mini-DiSEqC) signal:
0 for the settings A and C,
1 for the settings B and D.
By means of a Tone Burst (mini-DiSEqC) switch
you can switch between 2 satellites (A /B).
The static 22 kHz signal can be used to switch bet-
ween the lower and upper frequency range of uni-
versal LNC’s (setting –/
~
)
3. Tone Burst (mini-DiSEqC) switch and
22 kHz switch (up to 4 satellites)
Tone Burst (mini-DiSEqC) signal:
0 for the settings A and C,
1 for the settings B and D.
By means of a Tone Burst (mini-DiSEqC) switch
you can switch between 2 satellites (A /B).
If you use only single-range LNC’s, you can use the
static 22 kHz signal to switch between the satellites:
Satellite:
Setting:
1
– A
2
~ A
3
– B
4
~ B
For this, a 22 kHz switch must be connected to each
of the Tone Burst (mini-DiSEqC) switch outputs.
❒
LNC arrangement 5
(many connection possibilities)
Like LNC arrangement 4, but the DiSEqC signal is
output twice. This may be necessary if several
DiSEqC switches are connected in series.
❒
LNC arrangement 6
(many connection possibilities)
Like LNC arrangement 4, but the DiSEqC signal is
output three times. This may be necessary if sever-
al DiSEqC switches are connected in series.
220-240 V~
50-60 Hz
EURO AV VCR
EURO AV DECODER
EURO AV TV
AUDIO OUT
VIDEO
CONTROL
R
L
INPUT-SAT
950-2150 MHz
14/18 V 350 mA
B
VCR
A
TV
TV
CH.
ADJ.
AERIAL
MADE IN U.K.
DECODER
HAZARD-LIVE PARTS
DO NOT REMOVE COVERS
R
L
AUDIO
OUT
30W MAX.
50/60 Hz
230V
INPUT A
13V/18V
350mA DC
TV /VCR
INPUT
MAINS
TV
VCR
INPUT B
13V/18V
350mA DC
Multi-Satellite Reception
General
Your receiver provides many possibilities of receiv-
ing programmes of various satellites. Some examp-
les are explained in detail below.
6
Reception of Two Satellites
For the reception of two satellites (2 aerials or 1
aerial with 2 LNB’s), it is necessary to install a
22 kHz multi-switch (e.g. GRUNDIG SVT 5/4 A) be-
tween the receiver inputs A/TV and B/VCR and the
two LNB’s (see figure).
In this case dual LNB’ s should be used (e.g.
GRUNDIG LNC DUAL 1).
Example: Reception of Astra and Eutelsat (groups
1
and
2
, see page 8).
The 22 kHz signal is to be output for the reception
of Eutelsat.
In this case, select LNC arrangement 2 (
$
2) and
enter the oscilator frequencies for the LNC’s used.
$
A
$
2
$ %
✓
–A 09.750
~A 09.750
6
/ OK
2
6
LNB oscillator programming on receiver:
Astra: LNB LO 1 = 9.75 GHz
Eutelsat: LNB LO 2 = 9.75 GHz
(factory default setting)
V/H switching: 14/18 V
LNB selection: 0/22 kHz
Astra
LNB oscillator frequency,
e.g. 9.75 GHz
terrestrial aerial
22 kHz multi-switch
e.g. GRUNDIG SVT 5/4 A
Dual LNBs, e.g. GRUNDIG LNC DUAL 1
evtl. connection of (a) further receiver(s)
0 kHz
22 kHz
V
H
V
H
Eutelsat
LNB oscillator frequency,
e.g. 9.75 GHz
Multi-aerial system
