Sea Tel DAC-03, Installation And Operation Manual

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DAC-03 Tracking Antenna Controller Setup
5-7
Antenna A is the same as the previous example and its ACU would be set to those AZ
LIMIT values.
Antenna B ACU would be set to:
In this example Antenna B zone 1 is caused by the stack, zone 2 is from Antenna A and zone 3 is
from the mast.
ZONE 1 begins (AZ LIMIT 1) at 188 degrees Relative and ends (AZ LIMIT 2) at 204 degrees
Relative. Multiply these Relative positions by 10. Enter AZ LIMIT 1 value of 1880 and AZ
LIMIT 2 value of 2040.
ZONE 2 begins (AZ LIMIT 3) at 254 degrees Relative and ends (AZ LIMIT 4) at 278 degrees
Relative. Multiply these Relative positions by 10. Enter AZ LIMIT 3 value of 2540 and AZ
LIMIT 4 value of 2780.
ZONE 3 begins (AZ LIMIT 5) at 342 degrees Relative and ends (AZ LIMIT 6) at 348 degrees
Relative. Multiply these Relative positions by 10. Enter AZ LIMIT 5 value of 3420 and AZ
LIMIT 6 value of 3480.
EXAMPLE 3 - One blockage Zone: A ship
has a Sea Tel antenna mounted on the center
line of the ship. A mast is forward and an engine
exhaust stack is aft. In this example the Stack
does
NOT block the satellite, only the mast
forward does. In this example zone 1 is caused
by the mast, zone 2 and zone 3 are not needed:
ZONE 1 begins (AZ LIMIT 1) at 352
degrees Relative and ends (AZ LIMIT 2)
at 8 degrees Relative. Multiply these
Relative positions by 10. Enter AZ LIMIT
1 value of 3520 and AZ LIMIT 2 value of
0080.
ZONE 2 is not needed. Enter AZ LIMIT 3
value of 0000 and AZ LIMIT 4 value of
0000.
ZONE 3 is not needed. Enter AZ LIMIT 5
value of 0000 and AZ LIMIT 6 value of
0000.
5.3.17. TX Polarity
If the NS/EW polarization toggle feature is desired this parameter must be set to 0000. To prevent
inadvertent switching of the transmit polarity, the user can lock out NS/EW toggle feature and force
the transmit polarity to be fixed horizontal or vertical with this parameter. With the feed in the
center of its polarization adjustment range, observe the transmit port polarity (vector across the
short dimension of the transmit wave-guide). Refer to your antenna manual for default settings.
5.3.18. TRACK DISP (your software may not have this setting)
This parameter sets the selections that the user will see in the Tracking - Band Selection menu.
Band Selection
must be set to the appropriate selection for Tracking to operate properly.
Band selection controls the local logic output state of SW1 output terminal on the Terminal
Mounting Strip PCB and remote C/Ku relays (or other switches) on the antenna pedestal.
Refer to your antenna manual for the proper default value (and the associated displayed ACU
selections, and the remote Tone/Band/Voltage controls, that will be set as the band selection is
toggled by the operator.
When the SW1 output is shorted to ground a current sink of 0.5 amps max is provided to control
below decks band selection tone generators or coax switches. When SW1 output is open it is a
floating output.