INSTALLATION AND OPERATION MANUAL FOR SEA

Series 04 Ku-Band TVRO Antenna Setup

5. Setup

Below are basic steps to guide you in setting up the ACU. Assure that the Antenna Pedestal (ADE) has been properly installed before proceeding.

5.1. Operator Settings

Refer to the Operation chapter of the ACU manual to set the Ship information. Latitude and Longitude should automatically update when the GPS engine mounted on the antenna pedestal triangulates an accurate location, but you may enter this information manually to begin. You will have to initially enter the current heading of the ship after which the Gyro Compass will keep the ACU updated.

Then set the Satellite information for the satellite you will be using. The receiver settings are especially important.

After the Ship and Satellite setting have been made you should be able to target the desired satellite.

Continue with the setup steps below to optimize the parameters for your installation.

5.2. Optimizing Targeting

Ensure that all your Ship & Satellite settings are correct. Target the desired satellite, immediately turn

Tracking OFF and record the Antennas Azimuth and Elevation positions (Calculated Position) when it finishes targeting. Turn Tracking ON, allow the antenna to “Search” for the targeted satellite and assure that it has acquired (and peaks up on) the satellite that you targeted. Now, record the Antenna Azimuth and

Elevation positions while peaked on the targeted satellite (Peak Position). Subtract the Peak Positions from the Calculated Positions to determine the amount of Trim which is required. Refer to the ACU manual

Setup information for instructions on how to key in the required value of Elevation Trim. Continue with

Azimuth trim, then re-target the satellite several times to verify that targeting is now driving the antenna to a position that is within +/- 1.0 degrees of where the satellite signal is located. EXAMPLE: The ACU targets to an Elevation position of 30.0 degrees and an Azimuth position of 180.2 (Calculated), you find that Peak

Elevation while ON your desired satellite is 31.5 degrees and Peak Azimuth is 178.0. You should enter an EL

TRIM value of –1.5 and an AZ TRIM of +2.2. When completed, record the optimized TRIM settings in the

“My Parameters” column of the default parameters setup table.

5.3. Optimizing Auto-Polarization TVRO

If your system is fitted with a circular feed you do not need to optimize the polarity angle and can skip this procedure. This procedure optimizes the linear polarization of the feed. Verify that tracking is ON and that the antenna is peaked on your targeted satellite (targeting calculates the azimuth, elevation and polarization angles). Assure that you are in Auto-Pol mode (POL TYPE parameter in the ACU is set to 0072) and set one of your satellite receivers to view its signal level display. Go to the POL OFFSET parameter in the Setup menu of the ACU.

Default setting is 0030 and may be incremented, or decremented, to adjust polarization while in Auto-Pol mode. Each increment equals one degree of polarization rotation (0038 = +8 degrees), decrement below 30 for minus polarization (0022 = -8 degrees). Press the UP arrow to increment or the DOWN arrow to decrement the value and then hit the ENTER key to adjust the feed to the new value.

Adjust the polarization UP until you see the signal level on the receiver fall. Note the “high” offset value and adjust the offset DOWN until you see the signal peak and then begin to fall. Note this “low” offset value.

Set POL OFFSET to a value that is mid-way between the high & low values you just observed. Save your new

POL OFFSET value (refer to Save New Parameters in your ACU manual).

5.4. Radiation Hazard and Blockage Mapping

The ACU can be programmed with ship relative azimuth limits to enhance operation where there are known blockage regions. Tracking and auto Search are suspended when the antenna is pointed within this region to speed signal re-acquisition when the ship turns and the antenna comes out of signal blockage. The

BLOCKED condition is displayed in the TRACKING window. AZ LIMIT 1 is the Lower Relative AZ limit for pattern blockage mapping. AZ LIMIT 2 is the Upper Relative AZ limit for pattern blockage mapping.

5-1

Setup Series 04 Ku-Band TVRO Antenna

The ACU also provides a contact closure to ground on the SW1 terminal (J3-11) on the Terminal Mounting

Strip when the antenna is pointed within the blockage region or the system is searching, targeting or unwrapping. The contact closure is a transistor switch with a current sinking capability of 1 Amp. This signal can be used to control dual antenna coax switches to select IF signal connections from a second antenna when the primary antenna is blocked.

Programming instructions:

Determine the Relative AZ limits that cause signal blockage by monitoring the REL display readings or by graphing the expected blockage pattern. The Relative angles are with respect to the Pedestal reference, which is normally pointed at the bow (360.0 Relative). In a dual cable-wrap antenna system, one of the antennas may be pointed aft so its relative limits will be with respect to aft. The relative angles must be in the range of 0 to 360 degrees (0000-3600). Convert the relative readings to limit values by multiplying by

10. Enter the beginning of the blockage region as AZ LIMIT 1 and the end of the region (clockwise direction from AZ LIMIT 1) as AZ LIMIT 2.

EXAMPLE: A drill ship has two antennas mounted in the front of the ship with a derrick blocking the antenna’s view to the rear. The Port antenna is mounted referenced to the bow and is blocked from 160 to

175 degrees. The Starboard antenna is mounted reference to the stern and is blocked from 355 to 375 degrees relative to the stern. (375-360=015).

The limits for the port antenna are: The limits for the starboard antenna are:

AZ LIMIT 1 = 160 x 10 = 1600 AZ LIMIT 1 = 355 x 10 = 3550

AZ LIMIT 2 = 175 x 10 = 1750 AZ LIMIT 2 = 15 x 10 = 0150

Note: The AZ LIMITS of the starboard antenna are entered as 355 to 375 degrees. This defines a blockage zone of 20 degrees. If the limits were entered as 015 to 355, the blockage zone would be 340 degrees.

5-2

Series 04 Ku-Band TVRO Antenna Setup

5.5. Default Setup Parameters – Series 04

The following table shows the factory default parameters for the DAC-2200 interfaced to a Series 04

Antenna PCU. When the installation & setup of your system is finished you can record the “optimized” settings for your system in the “My Parameters” column. Refer to the Setup Flow-Charts and individual parameter setting information in the Setup section of your DAC-2200 manual for how to enter/change the parameters.

PARAMETER Ku DishScan My Parameters

EL TRIM

AZ TRIM

AUTO THRES

EL STEP SIZE

AZ STEP SIZE

STEP INTEGRAL

SEARCH INC

SEARCH LIMIT

SEARCH DELAY

SWEEP INC

SYSTEM TYPE

GYRO TYPE

POL TYPE

POL OFFSET

POL SCALE

AZ LIMIT 1

AZ LIMIT 2

5V OFFSET

5V SCALE

TX POLARITY

0

0

3004=100, 4004=130,

5004=160

0

0

0

10

100

30

0080

69

0002

0

0

0

0

72

30

90

2

5-3

Setup Series 04 Ku-Band TVRO Antenna

This Page Intentionally Left Blank

5-4