TechniSat GigaSystem 17/8 K Benutzerhandbuch
Seite 30
5.1 Additional reference to LNB’s, cables and wall-sockets
LNB’s:
Switchable LNB’s (Quatro Switch LNB’s or Twin LNB’s) should only be used if they are alrea-
dy available, only for single party installations and also only with SAT1 inputs (Option A /
Position A, here the switching matrix provides 22 kHz for the High Band). The degradation in
insulation consistent with the use of switchable LNB’s does not affect single-party installati-
ons (using only a single 17/8G and a 17/8K).
In conjunction with SAT1, two Twin LNB’s can only be used for two different orbital positions.
As far as the intention to receive two planes of a Low Band, this can also be achieved by
using a Dual Output LNB or a TWIN LNB.
If you require only a single polarisation plane in the Low Band range, you can use a Single
LNB for this. A polarisation plane in the High Band range can be received via a Single LNB
only via the SAT1 connection.
Cable:
Table 1: Loss (dB/x metre) of suitable cable types
>
Regarding selection of the cable see also chapter 4.2
Type
CoaxSat 2150 (100 dB)
Mini-,
Multimediacable
dB at frequency/MHz
30
300 860
2150
30
300
860
2150
10 m
0,3
1
1,8
3
0,5
1,5
2,5
4,2
20 m
0,6
2
3,6
6
1
3
5
8,4
30 m
0,9
3
5,4
9
1,5
4,5
7,5
12,6
40 m
1,2
4
7,2
12
2
6
10
16,8
50 m
1,5
5
9,0
15
2,5
7,5
12,5
21
60 m
1,8
6
10,8
18
70 m
2,1
7
12,6
21
Loop resistance (core
and shield)
- For a single cable
- For the 7 cables of a
feed voltage
0.35 Ohm/10m
60 mOhm/10m
0.56 Ohm/10m
80 mOhm/10m
30
GB
GigaSystem_17_8_deu_engl_23112011_3.qxp 28.11.2011 09:34 Seite 30