Site preparation
3-14
Chapter 3: Installation
98-137654-A
The separation distance for C-band (4-8 GHz) radars should
generally be the same as for S-band radars.
3.2.6.3 Radar interference
Even at distances greater than “d min.” in the previous section the
radar might still be able to degrade the performance of the SAILOR
100 Satellite TV system.
The presence of one or more S or X-band radars within a radius up
to 100 m may cause a minor degradation of the Ku-band reception.
The degradation will be most significant at high radar pulse
repetition rates.
As long as receiving conditions are favourable, this limited
degradation is without importance. However, if receiving conditions
are poor – e.g. due to objects blocking the signal path, heavy
rainfall or icing, low satellite elevation and violent ship movements
– the small extra degradation due to the radar(s) could cause poor
connection quality.
The presence of S-band radar(s) is unlikely to cause any
performance degradation – as long as the minimum distances (d
min.) listed in the previous section are applied.
It is strongly recommended that interference free operation is
verified experimentally before the installation is finalized.
S-band (~ 10 cm / 3 GHz) damage distance
Radar
power
SAILOR 100 Satellite TV ADU
d min. at 15° vertical
separation
d min. at 60° vertical
separation
0 – 10 kW 2.0 m
1.0 m
30 kW
3.0 m
1.5 m
50 kW
5.0 m
2.5 m
Table 3-6: Minimum radar separation, S-band
CAUTION!
The ADU must never be installed
closer to a radar than “d min.” - even if
experiments show that interference free
operation can be obtained at shorter distances
than “d min.” in the previous section.
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