Sea Tel 6012-33, Инструкция по установке

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6012-33 Installation Manual Setup – Blockage & RF Radiation Hazard Zones
10-2
EXAMPLE - Overlaid Blockage Zones: A ship has a Sea Tel antenna mounted on the center line of the ship. A
mast mounted on top of a deckhouse (like the picture below) is forward and an engine exhaust stack, also on a
deckhouse, is aft. These two blockage areas have wide azimuth blockage at lower elevations and then a narrower
azimuth area of blockage extends up to a higher value of elevation.
ZONE 1 named “Fwd Deckhouse” begins ( REL Start ) at 334 degrees Relative and ends ( REL Stop ) at 026
degrees Relative. Enter
REL Start
value of 334.0
and
REL Stop
value of 26.0. In this case the
mast height only causes blockage up to an
elevation of 40 degrees, so we set
EL
to 40.0. If
the antenna is between these two AZ Limit points
but not in the “mast” zone AND the elevation is
greater than 40 degrees, the antenna will no
longer be blocked.
ZONE 2 named “Mast” begins (
REL Start
) at 352
degrees Relative and ends ( REL Stop ) at 008
degrees Relative. Enter REL Start value of 352.0
and REL Stop value of 8.0. In this case the mast
height only causes blockage up to an elevation of
70 degrees, so we set
EL to 70.0. If the antenna is between these two AZ Limit points but the elevation is
greater than 70 degrees, the antenna will no longer be blocked.
ZONE 3 named “Aft Deckhouse” begins (
REL Start
) at 155 degrees Relative and ends (
REL Stop
) at 205
degrees Relative. Enter
REL Start
value of 155.0 and
REL Stop
value of 205.0. In this case the aft
deckhouse height only causes blockage up to an elevation of 30 degrees, so we set
EL
to 30.0. If the antenna
is between these two AZ Limit points but the elevation is greater than 30 degrees, the antenna will no longer
be blocked.
ZONE 4 named “Stack” begins (
REL Start
) at 173 degrees Relative and ends (
REL Stop
) at 187 degrees
Relative. Enter
REL Start
value of 173.0 and
REL Stop
value of 187.0. In this case the stack height only
causes blockage up to an elevation of 55 degrees, so we set
EL
to 55.0. If the antenna is between these two
AZ Limit points but the elevation is greater than 40 degrees, the antenna will no longer be blocked.
10.2. Programming Instructions:
1. To set up the blockage zones go to the
System Configuration screen.