5.3 LNBs
>
You may choose quattro, dual output or twin LNBs, but not universal twin types.
>
Use only high-quality LNBs from reputable manufacturers, such as TechniSat Part.
No. 0000/8880, providing either linear or diagonal frequency compensation. The out-
put level should be >75 dBµV.
>
The LNBs receive their mains power supply via the basic unit GigaSwitch 11/20G.
Please note the maximum power supply as per the technical specifications.
5.4 Cables
>
We recommend that you use crimp-type connectors only!
>
We recommend CoaxSat 2150 cable for your connections leading to the LNBs. If the
circumstances within the house/building permit, this type of cable should also be used
for the connections to the individual participants.
>
For systems distributing to more than 40 participants we recommend the use of multi-
media cable for the main line connections (1 x 4-strand, 1 x 5-strand).
>
Cables must be insulated as follows:
Damping (dB/x/metre) of suitable cable types
5.5 Selecting the antenna connectors
The individual participants are connected by means of antenna connectors, e.g. types SV
500, SVT 500. This allows terrestrial programmes to be received without any need to change
the connectors. At the same time, this type of connector also protects the receiver from faults
occurring outside the bandwidth.
Output levels of a SV 500 antenna connector:
6
Sat-bands
UKW
VHF
UHF
Damping of connector
(dB)
2
5
4
Level (dBµV)
minimal
recommended maximal
47
58
79
50
63
70
55
63
70
55
63
70
Type
At MHz
10m
20m
30m
40m
50m
60m
70m
CoaxSat 2150
40
300 860
2150
0.3
1
1.8
3
0.6
2
3.6
6
0.9
3
5.4
9
1.2
4
7.2
12
1.5
5
9
15
1.8
6
10.8
18
2.1
7
12.6
21
Mini Coax
40
300 860
2150
0.5
1.5
2.5
4.2
1
3
5
8.4
1.5
4.5
7.4
12.6
2
6
10
16.8
2.5
7.5
12.5
21
Multimedia 4 u. 5
40
300 860
2150
0.7
1.7
3
4.9
1.4
3.4
5
8.4
2.1
5.1
9
14.7
MS11-20-1.qxd 20.09.00 12:57 Seite 6
