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Illumination using RP1
The highest carrier to noise ratio, good side lobe
performance.
(xlnt for general use)
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Illumination using RP1
The best balance between carrier to noise ratio and
side lobe performance.
(xlnt for zero to light "TI" areas)
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Illumination using RP1
The carrier to noise ratio is not
as high as above but is in
the acceptable range.
Side lobe performance is improved.
(xlnt for moderate "TI" areas) |
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Illumination using RP1
The carrier to noise ratio has
been lowered even further
and the side lobe
performance is improved.
(xlnt for heavy "TI" areas) |
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Illumination using RP1
The carrier to noise ratio is at the minim and
the side lobes are lowest.
(use this configuration for extremely high "TI" areas) |
|
| SIDE LOBE: Side lobes are the high
peaks at the sides of the main peak of the antenna pattern. Low side
lobes are desired. (see fig. BB)
CARRIER TO NOISE RATIO: The power level of the
received signal (from the satellite) minus the background noise.
(see Fig 9)
FEED BEAM WIDTH: The illumination angle of the
primary feed horn, usually between 30o and 70o.
ANTENNA BEAM WIDTH: The angle of the signal
beam collected by the parabolic antenna. Larger antennas have
narrower beams.
TERRESTRIAL INTERFERENCE: "TI":
Sometimes called Telephone Interference, is the noise bands across
the picture which occure on some channels, while other channels
appear noise free. Antennas with high side lobes are defenseless to
"TI". (See Fig BB).
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Illumination using RP2
The highest carrier to noise ratio, good side lobe
performance.
(xlnt for general use)
|
|
Illumination using RP2
The best balance between carrier to noise
ratio and side lobe performance.
(xlnt for zero to
moderate "TI" areas) |
|
Illumination using RP2
The carrier to noise ratio is above average
and the side lobe performance is outstanding.
(xlnt for zero to extremely
high "TI" areas) |
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Illumination using RP2
NOT Acceptable under
Any Circumstances |
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DIRECT SALES