INSTALLATION AND OPERATION MANUAL FOR SEA

Series 04 Ku-Band TVRO Antenna Troubleshooting and Maintenance

7. Troubleshooting and Maintenance

This section describes the theory of operation to aid in troubleshooting and adjustments of the antenna system.

Refer to the Trouble shooting section of the DAC-2200 for additional troubleshooting details.

7.1. Warranty Information

Sea Tel Inc. supports its Series 04 systems with a TWO YEAR warranty on parts and ONE YEAR warranty on labor.

What’s Covered by the Limited Warranty?

The Sea Tel Series 04 Limited Warranty is applicable for parts and labor coverage to the complete antenna system, including all above-decks equipment (radome, pedestal, antenna, motors, electronics, wiring, etc.) and the Antenna Control Unit (ACU).

What’s NOT Covered by the Limited Warranty?

It does not include Television sets, DBS/DTH receivers, multi-switches or other distribution equipment, whether or not supplied by Sea Tel commonly used in TVRO Systems. Televisions, DBS/DTH receivers and accessories are covered by the applicable warranties of the respective manufacturers.

Factory refurbished components used to replace systems parts under this warranty are covered by this same warranty as the original equipment for the balance of the original warranty term, or ninety (90) days from the date of replacement, whichever occurs last. Original Installation of the Series 04 system must be accomplished by or under the supervision of an authorized Sea Tel dealer for the Sea Tel Limited Warranty to be valid and in force.

Should technical assistance be required to repair your system, the first contact should be to the agent/dealer you purchased the equipment from.

Please refer to the complete warranty information included with your system.

7.2. Recommended Preventive Maintenance

Ensure that all of the normal operating settings (LAT, LON, HDG, SAT and all of the Tracking Receiver settings) are set correctly. Refer to the Functional Testing section of this manual for instructions to conduct the tests below.

7.2.1. Check ACU Parameters

Assure that the parameters are set correctly (you may wish to record them in the Factory Default

Settings, in section 5 of this manual).

7.2.2. Latitude/Longitude Auto-Update check

Refer to the Latitude & Longitude Update check procedure in the Functional Testing section of this manual.

7.2.3. Heading Following

Refer to the Heading Following verification procedure in the Functional Testing section of this manual.

7.2.4. Azimuth & Elevation Drive

Refer to the Azimuth & Elevation Drive check procedure in the Functional Testing section of this manual.

7.2.5. Test Tracking

Refer to the four quadrant Tracking check procedure in the Functional Testing section of this manual.

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Troubleshooting and Maintenance Series 04 Ku-Band TVRO Antenna

7.2.6. Visual Inspection - Radome & Pedestal

Conduct a good, thorough, visual inspection of the radome and antenna pedestal. Visually inspect the inside surface of the radome top and of the antenna pedestal. Look for water or condensation, rust or corrosion, white fiberglass powder residue, loose wiring connections, loose hardware, loose or broken belts or any other signs of wear or damage.

1. Radome Inspection - The radome top/bottom flanges are properly sealed to prevent wind, saltwater spray and rain from being able to enter the radome. Re-seal any open (“leaky”) areas with marine approved silicone sealant. If heavy condensation, or standing water, is found inside the radome, isolate and seal the source of the leak, and then dry out the radome. Small (1/8 inch) holes may be drilled in the recesses of the base pan of the radome to allow standing water to “weep” out.

1. Antenna Pedestal Inspection - The springs (or rubber vibration dampeners) should not be completely compressed, or otherwise damaged. The plated and painted parts should not be rusted or corroded. The harnesses should not be frayed and all the connectors should be properly fastened and tightened. All hardware should be tight (no loose assemblies or counter-weights). Replace, re-coat, repair and/or tighten as necessary.

7.2.7. Mechanical Checks

Turn the antenna control unit OFF

1. Inspect inside of radome for signs that the dish or feed have been rubbing against the inside of the fiberglass radome.

2. Rotate the pedestal through its full range of azimuth motion. The antenna should rotate freely and easily with light finger pressure.

3. Rotate the pedestal through full range of elevation rotation. The antenna should rotate freely and easily with light finger pressure.

4. Tilt the pedestal through full range of left-right cross-level rotation. The antenna should rotate freely and easily with light finger pressure.

5. Rotate the level cage through the full 90 degrees of rotation from CCW stop to CW stop.

The level cage antenna should rotate freely and easily with light finger pressure. Attached cables should not cause the cage to spring back more that a few degrees from either stop when released.

6. Inspect all drive belts for wear (black dust on/under the area of the belt).

7.2.8. Check Balance

Check the balance of the antenna, re-balance as needed (refer to the Balancing the Antenna procedure below).

7.2.9. Observe Antenna Initialization

Observe the Antenna Initialization as described in the Troubleshooting section below.

7.3. Troubleshooting

Below are theory and diagnostic tests to assist you with troubleshooting the antenna. Refer to the previous section to check settings and do some initial functional testing prior to beginning troubleshooting.

7.3.1. Theory Of Stabilization Operation

The antenna system is mounted on a three axis stabilization assembly that provides free motion with 3 degrees of freedom. This assembly allows the inertia of the antenna system to hold the antenna pointed motionless in inertial space while the ship rolls, pitches and yaws beneath the assembly. Three low friction torque motors attached to each of the three free axes of the assembly provide the required force to overcome the disturbing torque imposed on the antenna system by cable restraints, bearing friction and small air currents within the radome. These motors are also used to re-position the antenna in azimuth and elevation.

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The Pedestal Control Unit (PCU) uses inputs from the level cage sensors to calculate the amount of torque required in each axis to keep the antenna pointed within +/-0.5 degrees. The primary sensor input for each loop is the rate sensor mounted in the Level Cage Assembly. This sensor reports all motion of the antenna to the PCU. The PCU immediately responds by applying a torque in the opposite direction to the disturbance to bring the antenna back to its desired position. Both the instantaneous output of the rate sensor (Velocity Error) and the integrated output of the rate sensor

(Position Error) are used to achieve the high pointing accuracy specification.

The calculated torque commands sent to each of three Brush-Less Servo Amplifiers. These amplifiers provide the proper drive polarities and commutation required to operate the Brush-Less

DC Servo Motors in torque mode. The Torque acting on the mass of the antenna cause it to move, restoring the rate sensors to their original position, and closing the control loop.

Since the rate sensors only monitor motion and not absolute position, a second input is required in each axis as a long term reference to keep the antenna from slowly drifting in position. The Level and Cross Level reference is provided by a two axis tilt sensor in the level cage assembly. The

Azimuth reference is provided by combining the ships gyro compass input and the antenna relative position.

7.3.2. Initialization Sequence

A functional operation check can be made on the antenna stabilization system by observing its behavior during the 4 phases of initialization.

Step 1. Turn on the AC power switch at the ACU front panel. Verify the level platform motor drives the level cage CCW to the stop and then CW 45 degrees.

Step 2. Verify the antenna moves forward or back to bring the top of the level cage to a level position in the for/aft direction. This step takes approximately 10 seconds and will result in the dish being at 45 degrees in elevation. The level cage may still be tilted left or right at this time.

Step 3. After the level cage is positioned in the for/aft direction, verify the antenna moves left or right to bring the top of the level cage to a level position in the left/right direction.

This step takes approximately 10 seconds.

Step 4. After the level cage is positioned in the left/right direction, verify the antenna moves CW (up) in azimuth to the 700.0 degrees, and then down CCW to 630.0 Relative position. From this point on the Encoder will increment and/or decrement the Relative position of the antenna. The antenna will report the PCUs’ Model number & Software version to the DAC-2202 ACU.

If any of theses steps fail, or the DAC-2202 reports model number as "xx04", re-configure the PCU as described in section the Setup section of this manual. If initialization still fails, refer to the troubleshooting information below or the troubleshooting section of the Touch Screen Controller manual.

7.3.3. Troubleshooting using DacRemP

While troubleshooting a Sea Tel 3-Axis Antenna System, you must classify the fault you are dealing with as a failure within one of 3 major system functions, Targeting, Stabilization, and Tracking.

Should there be a failure with any one of these functions, your system will not operate properly. A few simple checks may help determine which fault (if any) that you are dealing with. The matrix below lists some test(s) and which of the DacRemP graph selection would be best to use to identify a fault. The end of this chapter contains examples on how to use DacRemP to diagnose a fault.

Targeting: is the ability to accurately point the antenna to an angular position in free space and is controlled by the ACU. (Does the system drive to the Azimuth, Elevation, and Polarity positions within 1 degree of the desired satellite?)

Stabilization: is the process of de-coupling the ships motion from the antenna and is controlled by the PCU. (Does the system maintain the satellite link after turning off TRACKING?)

Tracking: is the process of issuing fine adjustments to the pointing angle of the antenna to optimize the received signal level and is controlled by the ACU. (Does the system pass a four quadrant-tracking test?)

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Troubleshooting and Maintenance

Functional Test(s)

Four Quadrant Tracking.

Azimuth Encoder Verification.

Sea Trial

Side Lobe Plots

Series 04 Ku-Band TVRO Antenna

DacRemP Graph

Selection to use

ADMC (Position)

ADMC (Position)

ADMC (Position)

ADMC (Position)

System Function(s)

Tracking

Targeting

Targeting

Tracking

Stabilization

Tracking

Determine Blockage Mapping ADMC (Position)

Pedestal Gain Verification

Home switch (flag) verification (Unlimited

Az systems only)

Remote Tilt Verification

Level cage alignment Verification (sensor alignment)

DISPIVC (Loop Error)

DISPV (Ref)

DISPV (Ref)

DISPV (Ref)

Tracking

Stabilization

Stabilization

Stabilization

Targeting

Stabilization

Targeting

Stabilization

AZ Friction Torque Test

DishScan Drive/Phase

DISPTC (Drive)

DishScan XY

Stabilization

Tracking

Stabilization

7.3.4. Antenna Loop Error Monitoring

The DacRemP DISPIVC graph chart provides a means for monitoring the accumulated velocity errors of the antenna for diagnostic purposes. If this error is excessive, it indicates external forces are acting on the antenna. These forces may be the result of but not restricted to static imbalance, excessive bearing friction, cable binding, or wind loading. If these forces cause the antenna to mispoint by more than 0.5° from the desired position the PCU will flag a “Stab Limit” error.

• To view the position error, select the

graph chart.

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• This chart displays sensed axis errors via three traces, CL (Cross Level), LV (Elevation), and

AZ (Azimuth), at a fixed 0.05º/ vertical division.

• The normal trace average will plots it’s display ± 3 divisions from the red reference line.

Any trace line average plotted above this is of concern and troubleshooting required. The example below shows the forces exerted onto the antenna as a resultant of DishScan Drive.

The example below shows the results of various forces put upon antenna.

• Cross-Level Axis physically moved CCW (down to the left.) and then CW (up to the right.)

Elevation Axis physically moved CW. (reflector slightly pushed up) and then physically moved CCW. (reflector slightly pushed down.) At the end of chart recording shows

• DishScan Drive turned Off, notice the lack of accumulated IVC errors.

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7.3.5. Reference Sensor Monitoring

The DacRemP DISPV graph chart provides a means for monitoring the output of the 2 Axis Tilt

Sensor and the Home Switch sensor for diagnostic purposes. The Tilt sensor (located inside the

Level Cage Assembly) is the primary input for the antenna’s reference to the horizon (0° Elevation and 90° Cross-Level). While the Home Switch Sensor (located at the antenna base) is used to calibrate the antenna’s position relative to the vessels BOW.

• To view the reference sensors, select the

graph chart.

• This chart displays the output of the Tilt Sensor via two traces, CL (Cross Level), LV

(Elevation) at a fixed 1º/ vertical division, and the home flag logic level via a single trace, AZ

(Azimuth).

• The normal trace display for the Tilt Sensor, after performing remote tilt calibration, will be

± 4 divisions from the red reference line. Any trace line average plotted above this is of concern and troubleshooting required. See below for a screen capture of an antenna that is

Level in both the Cross-Level and Elevation Axis.

• The Cross Level Tilt display should plot on the red reference line when the level cage is level, referenced to the horizon. It should decrease (plots below red line) when the antenna is tilted to the left and increase (plots above red line) when tilted to the right. See below for a screen capture of an abnormal CL trace Plot, it is an indication that the antenna that is either listed to the right approx. 4 degrees or the PCU requires to much CL tilt bias.

• The Level tilt display should plot on the red reference line when the level cage is level, referenced to the horizon. It should decrease (plots below red line) when the antenna is tilted forward (EL down) and increase (plots above red line) when tilted back (EL up).

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• The Azimuth display for the Home Switch will normally display a logic level high (plots directly on Red reference line after clicking on the button) when the home flag is

NOT engaged and changing to a logic level low when engaged. See below for a screen capture of an antenna that was driven so that the Home Flag switch is engaged.

7.3.6. Open Loop Rate Sensor Monitoring

The DacRemP DISPW graph chart provides a means for monitoring the output of the 3 solid state rate sensors (located inside the Level Cage Assembly) for diagnostic purposes. The rate sensors are the primary inputs to the PCU for stabilization.

• To monitor the rate sensors, select the

graph chart

• This chart displays sensed output from the 3 rate sensors via three traces, CL (Cross Level),

LV (Elevation), and AZ (Azimuth), at a fixed 1º/Second/vertical division.

• A normal trace display will be ± 1 divisions from the red reference line. The example shown below shows an antenna that is NOT currently sensing motion in any axis.

• The Cross Level display should decrease (plots below red line) as the antenna is tilted to the left and increase (plots above red line) as the antenna tilted to the right.

• The Level display should decrease (plots below red line) as the antenna is tilted forward and increase (plots above red line) as the antenna is tilted back.

• The Azimuth display should decrease (plots below red line) as the antenna is rotated CCW and increase (plots above red line) as the antenna is rotated CW. In the example below, the output of the Azimuth rate sensor is plotted above the reference line, indicating that the antenna was driven CW in Azimuth. Due to the in-practicality of driving an axis at a

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Troubleshooting and Maintenance Series 04 Ku-Band TVRO Antenna consistent rate, verification of rate sensor output is, for the most part restricted to a positive or negative response of the Level Cage movement (plotting above or below the red reference line of each axis).

7.3.7. Motor Drive (Torque Command) Monitoring

The DacRemP DISPTC graph chart provides a means for monitoring torque commands required for each motor for diagnostic purposes and verifying antenna balance. By observing each trace, the required drive of the antenna via the motor driver PCB may be established.

• To view the Torque Commands, select the

graph chart.

• This chart displays the Torque Command errors for each axis via three traces, CL (Cross

Level), LV (Elevation), and AZ (Azimuth), at a fixed 0.195amps/vertical division.

• A normal trace display will be ± 1 divisions from the red reference line while under calm sea conditions and with DishScan Drive turned off. See example below

• The Cross Level display will decrease (plots below red line) as the antenna requires drive to the left and increase (plots above red line) as the antenna requires to the right.

Example: The antenna pictured in the screen capture below is imbalanced so that it is

“Right Heavy”. The CL trace is plotting above the red reference line (indicating that drive

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CCW is required to maintain a 90°Cross-Level position).

• The Level display should decrease (plots below red line) as the antenna requires drive forward (Up in elevation) and increase (plots above red line) as the antenna requires drive back (Down in elevation).

• Example: The antenna pictured in the screen capture below is imbalanced so that it is

“Front Heavy”. The LV trace is plotting above the red line (indicating that drive CW is required to maintain the current elevation position).

• The Azimuth display should decrease (plots below red line) as the antenna is driven CCW and increase (plots above red line) as the antenna is rotated CW.

7.3.8. Open Loop Motor Test

The DacRemP Comm Diagnostics Window provides a means to enter in Remote Commands for driving each individual torque motor to test that motors functionality. By driving each axis and observing the resulting motion of the antenna, a coarse operational status of the motor and motor driver may be established.

• To manually drive the motors, select the “Comm

Diagnostics” window under to the Tools submenu or Press “CTRL + C”

• Using the small field in the upper left hand corner of the window, type in the remote command and verify the motor appropriately drives in the direction commanded.

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• To drive the Cross Level motor, key in ^1064, ^1128 or ^1192 and press ENTER to drive the Cross Level axis LEFT, OFF or RIGHT respectively.

• To drive the Level motor, key in ^2064, ^2128 or ^2192 and press ENTER to drive the level axis FORWARD, OFF or BACKWARD respectively.

• To drive the Azimuth motor, key in ^3064, ^3128 or ^3192 and press ENTER to drive the azimuth axis CW, OFF or CCW.

7.3.9. To Disable/Enable DishScan

To be able to use Step Track, or to revert to Conscan, as your active tracking mode you will have to disable DishScan.

Select the DISHSCAN parameter window on the ACU:

1. Press the RIGHT arrow, then press the UP arrow and last press the ENTER key to turn

DishScan mode ON.

2. Press the RIGHT arrow, then press the DOWN arrow and last press the ENTER key to turn

DishScan Mode OFF.

If you change this remote parameter, you must save the change using REMOTE PARAMETERS.

If DishScan is OFF and the Step Integral parameter is set to 0000, you will get a constant

ERROR 0016 (DishScan error) and you will see zeros flashing in the lower left of the Azimuth and

Elevation ENTRY menu displays. This is a visual indication that DishScan is turned OFF.

7.3.10. Satellite Reference Mode

The ships gyro compass input to the ACU may be accurate and stable in static conditions and yet may NOT be accurate or stable enough in some underway dynamic conditions. If there is no gyro compass or if the input is corrupt, not stable or not consistently accurate the tracking errors will become large enough to cause the antenna to be mis-pointed off satellite.

Satellite Reference Mode will uncouple the gyro reference from the azimuth rate sensor control loop. When operating in Satellite Reference Mode changes in ships gyro reading will not directly affect the azimuth control loop. The Pedestal Control Unit will stabilize the antenna based entirely on the azimuth rate sensor loop and the tracking information from DishScan. This will keep the azimuth rate sensor position from eventually drifting away at a rate faster than the tracking loop can correct by using the tracking errors to regulate the rate sensor bias.

Satellite Reference Mode can be used as a diagnostic mode to determine if tracking errors are caused by faulty gyro inputs.

Satellite Reference Mode MUST be used when:

• No Gyro Compass is available

• Frequent or constant ACU Error Code 0001 (Gyro Compass has failed)

• Gyro Compass output is NMEA heading

• Flux Gate Compass is being used

• GPS Satellite Compass is being used

To view, or change, the Satellite Reference Mode status, select the SAT REF remote parameter:

1. Press the RIGHT arrow, then press the UP arrow and last press the ENTER key to turn

Satellite Reference Mode ON.

2. Press the RIGHT arrow, then press the DOWN arrow and last press the ENTER key to turn

Satellite Reference Mode OFF.

If you change this remote parameter, you must save the change using REMOTE PARAMETERS.

7.3.11. To Read/Decode an ACU Error Code 0008 (Pedestal Error):

Select the REMOTE COMMAND window on the ACU and;

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1. Using the LEFT/RIGHT and UP/DOWN arrow keys set the Remote Command value to

"" S0000" (the S must be upper case) and press ENTER.

2. Press ENTER key once more to display the REMOTE MONITOR window. SABC@ will be displayed (S followed by 3 letters and a symbol (checksum). The fourth letter ( C above) is the pedestal error letter. Ref is an AZ Reference, encoder or Home Flag error. AZ is

Azimuth, LV is Level (Elevation) and CL is Cross-Level. Decode the letter code using the chart below:

Letter REF AZ LV CL Description of Pedestal Error

@ 0 0 0 0 None

A 0 0 0 1 CL

B 0 0 1 0 LV

D 0 1 0 0 AZ

H 1 0 0 0 Ref

O 1 1 1 1 Ref + AZ + LV + CL

Q 0 0 0 1 Stab CL

R 0 0 1 0 Stab LV

S 0 0 1 1 Stab Limit + CL + LV

T 0 1 0 0 Stab AZ

U

V

0

0

1

1

0

1

1

0

Stab Limit + AZ + CL

Stab Limit + AZ + LV

\

]

^

_

W 0 1 1 1 Stab Limit + AZ + LV + CL

X 1 0 0 0 Stab Ref

Y

Z

[

1

1

1

0

0

0

0

1

1

1

0

1

Stab Limit + Ref + CL

Stab Limit + Ref + LV

Stab Limit + Ref + LV + CL

1

1

1

1

1

1

1

1

0

0

1

1

0

1

0

1

Stab Limit + Ref + AZ

Stab Limit + Ref + AZ + CL

Stab Limit + Ref + AZ + LV

Stab Limit + Ref + AZ + LV + CL

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7.3.12. Remote GPS LAT/LON Position:

The above decks equipment has an integrated on board Furuno GPS antenna system. The Latitude and Longitude position information provided are utilized to calculate the Azimuth, Elevation, Crosslevel and Polarity pointing angles of the desired satellite. The DacRemP “ Comm Diagnostics”

Window provides a means to query the GPS antenna to verify proper operation. The procedure below describes this process.

3. Select the “Comm

Diagnostics” window under to the Tools submenu or Press “CTRL

+ C”

2. Left mouse click on the

icon.

3. Left Mouse click on the

“?@ PCU GPS position, 1 min (1 Nm)”

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4. In the “Response” window verify proper

GPS position to within 1 nautical mile of your current position.

The Latitude & Longitude position of the GPS will be displayed in the following format:

“@ LAT,N,LON,E,A”

Where LAT and LON are in degrees and minutes, LAT will be followed by N or S (North or

South), LON will be followed by

E or W (East or West), then a status character and finally a checksum character.

Furuno default value is in Japan at 34.4N 135.2E

(@3444,N,13521,E,,_).

After acquiring a good fix at Sea

Tel the string is

@3800,N,12202,W,A^ for our 38N 122W Latitude and

Longitude position.

The status character tells you the status of the GPS.

“,” (Comma) = GPS has NOT acquired a proper fix,

“N” = GPS fix is NOT valid

“A” = GPS has acquired a valid fix.


7.4. Maintenance

Below are some procedures for removing/replacing some of the major components on the antenna.

7.4.1. Replacing or Changing LNBs

Series 04 antenna can be easily fitted with a variety of LNB assemblies. The feed is capable of receiving linear or circular polarization signals, however, the LNB must match the desired satellite polarization mode. Below are the instructions to install and align a replacement LNB, or switch to a different LNB. . When a Linear LNB is installed POL OFFSET parameter must be optimized.

NOTE: Linear polarization skew is intentionally REVERSED from actual received satellite polarization by the ½ wave length phase card (refer to basic system information). Therefore, to adjust polarization UP the LNB (as viewed from the back side of the reflector) must rotate CCW and to adjust polarity DOWN the LNB must rotate CW.

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1. Open the radome hatch or remove radome top.

2. Target a Satellite Longitude that is the same as the Ships current Longitude. This will cause Auto-Polarization to rotate the current LNB to a vertical position (straight up), and the ACU polarization will be 120.

3. You may need to rotate the antenna to access the back of the dish.

4. Note that with the Cross-Level beam level, the body of the current LNB is vertical (straight up).

5. If you are replacing the LNB with the same style LNB, loosen the Allen set screws on the existing LNB mounting collar

(three set screws, 120 degrees apart) and extract it from the mounting collar. If you are changing the LNB to a different style LNB, loosen the four screws that attach the mounting collar to the driven gear and remove the LNB and mounting collar.

6. Insert the new LNB (same style) into the mounting collar, assure it is seated all the way into the mounting collar tube, rotate the LNB as needed to align the center of the body of the LNB to a vertical position (straight up) and tighten the set screws.

Mount the (different style) new

LNB into the mounting collar.

Assure that the LNB is seated all the way into the mounting collar tube, rotated to align the center of the body of the LNB to a vertical position (straight up) and tighten the setscrews.


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7. Transfer the coax cables from the old LNB to the new LNB, assure that the correct color coax is attached to the correct port on the LNB as well as the below deck active matrix switch. Below is Sea Tel’s recommended coax color code.

Dual Circular LNB

RHCP (Blue)

LHCP (White)

Dual Linear LNB

Vertical (Blue)

Horizontal (White)

Quad Linear LNB

Horizontal High (Black)

Vertical High (Green)

Horizontal Low (White)

Vertical Low (Blue)

8. Close the radome hatch or reinstall the radome top and tighten radome hardware.

9. Verify that the LNB operating properly and resume normal operation.


7.4.2. Replacing the PCU

It is highly recommended that all saved Parameters in the suspected failed Pedestal Control Unit

(P/N 122203) be recorded so they can be duplicated in the replacement PCU. Use either the

DAC2200 or DacRemP to record the following parameter settings; Remote Command responses to

N0999, N1999, N2999, N3999, N7999 commands and the Remote Monitor message of the

Remote command S0000.

Left Side El Pan Cover must be removed to access the (PCU)

Tools Required:

• ½” Nut driver or Wrench

• #2 Phillips Head Screwdriver

• 3/8” Nut driver or Wrench

• 2 mm Flat Blade Screw Driver

• Loctite 222 or equiv.

NOTE: Unless otherwise indicated, all nuts and bolts should be assembled with Loctite 222 or its equivalent.

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1. Remove the four 10/32 x 3/8” screws attaching El Pan Cover to PCU Assembly.


2. Remove the six 10/32 x 3/8” screws attaching El Pan Cover to El Pan bottom.

3. Remove the El Pan Cover.

4. Remove the BNC cable from the GPS antenna.

5. Loosen the 4-40 retaining screws on each of the Pedestal

Harness D-Sub connectors and unplug all 3 connectors.

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6. Being careful not to damage the BNC-HIROSE Pigtail cable, remove the 10/32 Hex nut and

#10 flat washer.


7. Remove the remaining two

10/32 Hex nuts and #10 flat washers.

8. Using caution, as antenna will drop hard to the right due the weight imbalance, remove PCU.

9. Replace PCU Assembly and secure to El pan using Loctite

222 and the hardware removed in steps 6 and 7.

10. Re-Connect D-sub connectors and BNC connector removed in steps 4 and 5.

11. Re-install EL P Cover and secure using Loctite 222 and the hardware removed in steps 1 and 2.

12. Check and/or adjust Antenna balance.

13. Configure the new PCU by following the procedure in paragraph 7.5.

14. Place a light weight bubble level on top of the level cage. Check to see if the level cage is level front/back and left/right. If either axis is not level follow the “Tilt Adjustment” procedure below.

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7.4.3. Replacing Level Cage or Level Cage Belt

This procedure to remove and replace Level Cage Assembly (P/N 122208-1) includes step to replace

& tension the level cage belt. If you are only replacing the level cage belt, jump to step 9.

Tools Required:



• 2 mm Flat Blade Screwdriver


1. Using 2mm flat blade

Screwdriver loosen screws securing D-Sub Connector to

Level Cage Assembly.

2. Using a #1 Phillips Screwdriver, loosen the four 4/40 screws attaching Level Cage Stepper

Motor to El Pan.

3. Slide sprocket assembly towards reflector and remove belt from Level Cage Stepper

Motor sprocket.

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4. With the cage rotated to the

CW stop, Observe orientation of the 15 Pin D-sub connector.

5. Using ½” Nut Driver or Wrench, remove jam nut securing Level

Cage Assembly to spindle.


6. Do Not remove Level Standoff.

7. Install new level cage onto spindle with the D-sub connector in the same orientation observed in step 5.

Secure with jam nut removed in step 4. Tighten the Jam nut just enough to capture the level cage between the standoff and the Jam nut, then tighten the

Jam nut 1/8 th

turn to slightly pre-load the bearings.

8. Rotate Level Cage assembly by hand and verify exactly 90 degrees range of motion, and that the cage rotates freely and

“Stops” do not rub against body of El Pan.

9. Slip the belt over the body of the level cage assembly.

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10. Plug the level cage cable back into the D-Sub connector and tighten retaining screws.

11. Place the belt onto the level cage pulley.

12. Place the belt onto Stepper

Motor sprocket.


13. Tension belt by sliding Motor sprocket assembly by hand away from level cage and tighten the four 4/40 screws loosened in step 2 with Loctite

222.

14. Rotate Level Cage by hand to the CCW and CW stop and check belt tension. Tension on belt should just enough to engage drive to level cage.

(approx. 3/16” play when pinched) If belt tension is tighter at the CCW stop than the CW stop or vice versa than readjust for proper tension with the level cage oriented where belt tension was greatest.


7.4.4. To Adjust Tilt:

Select the REMOTE TILT window on the ACU and;

1. Set a bubble (or bulls-eye) level on top of the Level Cage assembly. NOTE: If the level cage is not within 4 degrees of level fore/aft or left/right, replace the Level Cage assembly.

2. If the level cage is within 4 degrees in BOTH For/Aft and Left/Right, use the UP/DOWN arrow keys to adjust LV (fore/aft) until the level cage is level in this axis.

3. Use the LEFT/RIGHT arrow keys to adjust CL (left/right) until the level cage is level in this axis.

4. Once the level cage is level in both axes, wait for 30 seconds then press the ENTER key.

7-20


5. Press ENTER to step the menu to REMOTE PARAMETERS.

6. Press the LEFT arrow key and then press the ENTER key to save the settings in the PCU.

This saves the new tilt bias settings in the PCU. Reset or re-initialize the antenna to verify that the

Level cage is properly level with the new settings.

7.4.5. Replacing Level Cage Stepper Motor

Right Side El Pan Cover must be removed to replace the Level Cage Stepper Motor Assembly.

Tools Required:







1. Using the ½” wrench, remove the 5/16-18 x ½” bolt securing inside EL Pan bottom to Spindle

Plate.

2. Remove the three 10/32 x 3/8” screws attaching El Pan Cover to

POL AUX Relay Assembly.

7-21


3. Rotate Level Cage clockwise as required to access this 10/32 x

3/8” screw and remove.

4. Removing the Level cage assembly and or belt is not required.


5. Remove the four 10/32 x 3/8” screws attaching El Pan cover to

El Pan bottom.

6. Remove the two 10/32 x ½” screws attaching P-clamps to El

Pan Cover (and El Pan bottom).

7. Using 2mm flat blade screwdriver loosen the retaining screws from the D-sub connector and remove the level cage cable.

8. Carefully pull El Pan Cover away to expose Level Cage Motor

Wiring Harness and disconnect

IDC connector from Motor

Termination PCB.

9. Remove the four screws securing Level Cage Motor assembly to El Pan. Save

Hardware for future use.

7-22


10. Install replacement Level Cage

Motor assembly into El Pan with belt around sprocket and loosely secure with hardware removed in step 9.


11. Re-Install right El pan and secure using Loctite 222 and all hardware removed in steps 1, 2,

3, 5 and 6.

12. Plug the level cage cable into the

D-sub connector on the Level

Cage Assembly and tighten the retaining screws using 2mm flat blade screwdriver.

13. Tension belt by sliding Motor sprocket assembly by hand away from level cage and tighten the four 4/40 screws with Loctite

222.

7-23


14. Rotate Level Cage by hand to the CCW and CW stop and check belt tension. Tension on belt should just enough to engage drive to level cage.

(approx. 3/16” play when pinched). If belt tension is tighter at the CCW stop than the

CW stop or vice versa than repeat step 13 for proper tension with the level cage oriented where greatest belt tension was observed.

15. Check and/or adjust Antenna balance


7.4.6. Replacing Azimuth Double Stacked Motor w/ Encoder

Tools Required:

• 7/16” Wrench

• 9/64” Allen Head Wrench


• Snips / Flush Cutters




1. Using snips, cut Tie Wrap holding AZ Motor Harness and

Pedestal Interface Harness together.

2. Using 2mm Flat Blade

Screwdriver, loosen qty two retaining screws on AZ Motor harness and remove from AZ

Post Connector panel.

7-24


3. Using a 9/64” Allen Wrench, remove the four Allen head screws (bottom side of motor bracket) securing AZ motor and remove Motor Assembly. Save hardware for future use.


4. Insert replacement motor assembly into mounting bracket with cable harness towards AZ

Pulley.

5. Place AZ Belt around Az motor sprocket.

6. Tension belt by pulling motor assembly away from AZ pulley.

Secure motor to bracket using

Loctite 222 and hardware removed in step 1.

7. Re-connect Az Motor Harness to

AZ Post Connector Panel and secure two retaining screws loosened in step 1.

7-25


8. Rotate Antenna (by hand) from

CCW stop to CW stop while observing belt. Check to see the belt does not rub against motor mounting hardware and that the belt remains level with pulleys.

**Failure of this step normally indicates improper sprocket placement on the Azimuth

Motor shaft**


7.4.7. Replacing Azimuth Belt

Tools Required:

• 7/16” Wrench







1. Observe and verify Colored

Coax heat shrink matches silkscreen on AZ Post Connector panel.

2. Using a 7/16” Wrench, remove the four coax connectors.

7-26


3. Using a 2mm Flat blade screwdriver loosen retaining screws securing both D-Sub connectors to AZ Post

Connector Panel and remove.


4. Using snips, cut the Tie Wrap holding AZ Motor Wire harness and Pedestal Interface Harness together.

5. Using a 9/64” Allen Wrench, loosen the four Allen head screws (bottom side of the motor bracket) securing AZ motor and slide the motor in toward the Azimuth driven sprocket (complete removal of hardware is not required).

7-27


6. If not broken, remove the old belt from AZ driven sprocket and AZ motor sprocket.


7. Place replacement belt around

Azimuth motor sprocket, with interface harness and RF cables through the center of the belt.

8. Place the belt don onto the teeth of the Azimuth driven sprocket.

9. Tension belt by pulling motor assembly away from Azimuth driven sprocket and secure motor to bracket using Loctite

222 and hardware loosened in step 5.

7-28


10. Rotate Antenna from CCW stop to CW stop while observing belt.

Check to see the belt does not rub against motor mounting hardware and that the belt remains level with both sprockets.


7.4.8. Replacing Elevation Drive Motor

The following procedure for replacing Elevation belt with the factory installed spare belt on CL beam.

Tools Required:







1. Using 2mm Flat Blade

Screwdriver, loosen two retaining screws on EL Motor harness and remove it from AZ post.

7-29


2. Using a 5/32” Allen Wrench, remove the four Allen Head screws attaching elevation motor bracket to CL beam and remove motor assembly.


3. Observe cable orientation in reference to bracket and then remove Motor from bracket.

4. Using a 9/64” Allen Wrench, remove the four Allen Head screws attaching motor to bracket. Remove save hardware for future use.

5. Install replacement motor, and cable, onto the bracket (with cable in the same orientation observed in step 3) using the hardware removed in step 3. Do not tighten at this time.

6. Re-install bracket onto CL beam using two of the Allen head screws removed in step 2, do not fully tighten.

7. Place belt around elevation driven sprocket and then elevation motor sprocket.

8. Install the other two allen head screws and Secure motor bracket onto CL Beam using

Loctite 222 on all four screws.

7-30


9. Reconnect EL Motor harness removed in step 1 and secure with two retaining screws.

10. Rotate reflector from upper physical stop to access the

Elevation motor mounting hardware. Push back on the motor body to tension the elevation belt and tighten the four mounting screws with

Loctite 222.


11. Rotate reflector from upper physical stop to lower physical stop and verify that the motor sprocket and the belt do not rub against elevation pan and that the belt runs inline with both sprockets. (Failure of this step is normally due to incorrect sprocket placement on elevation motor assembly).

12. Check and/or adjust antenna balance.

7.4.9. Replacing Elevation Drive Belt

The following procedure for replacing Elevation belt with the factory installed spare belt on CL beam. If the spare belt (on the CL Beam) has already been used you must contact Sea Tel Service

Department for assistance.

Tools Required:







7-31


1. Using a 5/32” Allen Wrench, remove the two Allen Head screws which are farthest from the reflector (top and bottom) to enable you to swivel the elevation motor forward Toward the reflector. Loosen the two forward screws.


2. Using Snips, cut tie wrap(s) securing spare elevation belt to

CL beam. Use caution as to not cut belt.

3. Install replacement belt around the elevation driven sprocket and elevation motor sprocket.

4. Swivel the elevation motor bracket to CL beam (away from the reflector) and re-install the two screws removed in step 1.

Using Loctite 222 tighten all four screws removed/loosened in step 1.

7-32


5. Rotate reflector from upper physical stop to access the

Elevation motor mounting hardware. Push back on the motor body to tension the elevation belt and tighten the four mounting screws with

Loctite 222.


6. Rotate reflector from upper physical stop to lower physical stop and verify that the motor sprocket and the belt do not rub against elevation pan and that the belt runs inline with both sprockets. Incorrect belt travel is most frequently caused by incorrect sprocket placement on elevation motor shaft.

7. Check and/or adjust antenna balance.

7.4.10. Replacing CL Drive Motor

Tools Required:







7-33


1. Using a 2mm Flat Blade

Screwdriver, loosen two retaining screws on CL Motor harness and remove from AZ post.


2. Using a 9/64” Allen Wrench, remove the four Allen Head screws securing Cross Level

Motor to the C/L bracket. Save hardware for future use.

3. Remove CL Motor from bracket.

4. Install replacement Motor

Assembly onto CL Motor Bracket and using the hardware removed in step 2. Tighten the four screws with Loctite 222.

7-34


5. Loosen four Allen Head Screws securing CL Motor Bracket to AZ

Post. Complete removal of hardware is not required.


6. Install belt around CL Motor

Sprocket.

7. Tension belt by pulling the motor bracket down towards the antenna base and tighten the four screws with Loctite 222.

8. Rotate CL beam from CCW stop to CW stop (Left to right as viewed from behind reflector) and verify CL belt does not rub against AZ Post and runs inline with both sprockets. Incorrect belt travel is most frequently caused by incorrect sprocket placement on elevation motor shaft.

7.4.11. Replacing CL Drive Belt

Tools Required:






7-35



1. Loosen four Allen Head Screws securing CL Motor Bracket to AZ

Post. Complete removal of hardware is not required for belt removal.

2. Cut the two Tie Wraps securing old CL belt to Pulley.

3. Remove CL Belt from Pulley and

CL motor sprocket.

4. Install replacement belt around

CL motor sprocket and then around CL pulley.

7-36


5. Align belt flush to CL Pulley and secure with two tie wraps (as removed in step 2). Trim the excess off the tie-wraps.


6. Tension belt by pulling the motor bracket down towards the antenna base and tighten the four screws with Loctite 222.

7. Rotate CL beam from CCW stop to CW stop (Left to right as viewed from behind reflector) and verify CL belt does not rub against AZ Post and runs inline with both sprockets. Incorrect belt travel is most frequently caused by incorrect sprocket placement on elevation motor shaft.

7.4.12. Replacing the Polang Relay Assembly

Right Side El Pan Cover removal is required to access the Polang Relay Assembly P/N 122202

Tools Required:






7-37



1. Using the ½” wrench, remove the 5/16-18 x ½” bolt securing inside EL Pan bottom to Spindle

Plate.

2. Remove the three 10/32 x 3/8” screws attaching El Pan Cover to the Polang Relay Assembly.

3. Rotate Level Cage clockwise as required to access this 10/32 x

3/8” screw and remove.

4. Removing the Level cage assembly and or belt is not required.

7-38


5. Remove the four 10/32 x 3/8” screws attaching El Pan cover to

El Pan bottom.

6. Remove the two 10/32 x ½” screws attaching P-clamps to El

Pan Cover (and El Pan bottom).

7. Using 2mm flat blade screwdriver loosen the retaining screws from the D-sub connector and remove the level cage cable.

8. Carefully pull El Pan Cover away to expose Level Cage Motor

Wiring Harness and disconnect

IDC connector from Motor

Termination PCB.


9. Using a 2mm Flat blade

Screwdriver, loosen the 4-40 retaining screws on D-Sub connectors and remove Polang

Relay Harnesses.

7-39


10. Using 3/8” Nut Driver, remove the three 10/32 Hex Nuts and

#10 Flat Washers and then remove the Polang Relay

Assembly.


11. Replace the Polang Relay

Assembly and secure with

Loctite 222 and the hardware removed in step 10.

12. Re-Install connections removed in steps 9, 8 and 7.

13. Re-Install right El pan and secure using Loctite 222 and hardware removed in steps 1 through 6.


7.4.13. Replacing 24VDC Polang Motor Assembly

Series 04 Polang Motor replacement procedure is as follows.

Tools Required:

• ¼” and 7/16” Open Ended Wrench

• 5/64”, 7/64”, and 5/32” Allen Wrench’s

• Snips/ Cutters



7-40


1. Using a ¼” Wrench, remove the four 4-40 Small Pattern Hex

Nuts and Washers. Remove

Vertex Feed Tube and set aside.

Save all Hardware for future use.


2. Using the 7/16” Wrench, remove the RF Cables connecting to

LNB.

3. Using snips, cut tie wrap(s) securing harness to LNB if needed.

4. Using the 7/64” Allen Head remove Polang Harness ground

Lug attached to Polang plate.

5. Unplug Polang Harness IDC connection.

6. Using a 5/64” Allen Wrench, loosen the three setscrews in

LNB Mounting Cuff and remove

LNB from feed assembly. (Photo shown without LNB installed for setscrew location clarity).

7. Using snips, cut tie wraps securing harness to Polang

Motor assembly.

7-41


8. Using a 7/64” Allen Wrench, remove 3 screws (4 if Polang

Harness Shield was grounded at

Motor Termination PCB).


9. Carefully remove Polang

Assembly from reflector. Do

Not Pry off the retaining ring epoxied to reflector. (4004 and

5004 dishes are as shown, 3004 systems do not have an epoxy ring installed).

10. From the back side of feed assembly, Use a 5/32” Allen

Wrench to remove the screws securing 24V Polang Motor to bracket assembly. Save all hardware for future use

11. Remove Polang Motor and set aside.

7-42


12. Install replacement Polang

Motor, using Loctite 222 and the hardware removed in the step 9, with body of motor mounted flush on standoffs.


13. View Polang Assembly from bottom and verify that the

Polang Motor sprocket is fully engaged with Polang gear.

14. Reconnect POL Motor 2 Pin IDC connector.

7-43


15. Reconnect POL Pot IDC connector.

16. Secure both POL Pot and Polang

Motor harness to body of Pol

Motor using tie wraps.


17. Install feed assembly back onto reflector and secure with Loctite

222 and hardware removed in step 8.

18. Install the replacement Vertex

Feed Tube with the phase card oriented in the horizontal axis

(ref. to reflector).

19. Secure with the Loctite 222 and hardware removed in step 1.

7-44


20. Re-Install LNB and secure with setscrews loosened in step 5.

21. Reconnect RF cables removed in step 2.

22. Secure RF Cable Harness with a tie wrap around body of LNB and with enough service loop to allow full range of LNB travel.

23. Secure POL Harness ground lug to feed Plate with hardware removed in step 4.

24. Reconnect POL Harness to

Motor Termination PCB removed in step 5.


25. Rotate reflector by hand from upper elevation stop to lower elevation stop and verify LNB and/or Feed harnesses do not hit

CL beam.

26. Check and Adjust antenna balance.

27. If system is configured with

Linear LNB follow instructions for adjusting POL Pot. For systems configured with a

Circular LNB no further adjustments are needed.

7.4.14. Replacing Polang Potentiometer Assembly

Tools Required:

• 1/2” Open Ended Wrench

• 3/32” Allen Wrench

• Snips/ Cutters



7-45


1. Using snips, cut tie wrap securing Pol Pot wires to Polang motor assembly.


2. Disconnect Pol Pot IDC connector from motor termination PCB.

3. Using a 3/32” Allen Wrench remove the two screws attaching Pol Pot bracket to feed bracket. Remove Pol Pot assembly. Save all hardware for future use.

4. Using a 3/32” Allen Wrench remove setscrew securing sprocket to Potentiometer and remove sprocket.

5. Using a ½” wrench remove nut and lock washer securing Pol Pot to bracket. Save all hardware for future use.

7-46


6. Install replacement Pol Pot onto bracket and with wires exiting away from slot in bracket, secure with hardware removed in step

5.

7. Install Pol Pot sprocket onto the new Potentiometer using setscrew removed in step 4.


8. Install Pol Pot assembly back onto Feed assembly using hardware removed in step 3. Do not engage onto gear at this time.

9. Follow the below Pol Pot alignment procedure for setting

Pol Pot to its center of range.

7-47


Step 1: In the ACU setup menu, go to

Pol Type parameter and set to Polang to manual Mode:

7. Get into the ‘SETUP’ mode by pressing and holding the two

LEFT & RIGHT arrows until the ‘EL TRIM’ window appears.

10. Briefly release and then push and release both

LEFT & RIGHT arrow keys again. The ‘SAVE NEW

PARAMETERS’ window should now be displayed.

11. Push the ‘ UP’ arrow key until the until the ‘Pol Type’ parameter is displayed.


12. Use the LEFT &

RIGHT arrow keys to select appropriate digits then use the

‘ UP & DOWN’ arrow keys to change value. For Manual

Polarization Mode set Pol Type to 9. (To put antenna into Auto

Polarization Mode set to Pol

Type to 72)

Step 2: Press ‘ ENTER’ key to go to Pol Offset window and verify setting is

0030. (If necessary use arrow keys to select appropriate digits and change accordingly).

Step 3: Press ‘ ENTER’ key to go to Tx Pol parameter and ensure 2 is entered. (If necessary use arrow keys to select appropriate digits and change accordingly).

7-48


Step 4: Press

Antenna Window.

‘ NEXT’ key to select

Step 5: Press ‘ ENTER’ key until

‘Pol xxxx’ is displayed.

(Steps 7-12 requires assistance to observe and operate antenna

simultaneously)

Step 7: Enter radome and observe physical alignment of LNB. For the xx04 series, the LNB should be aligned in a

Vertical orientation, If not continue on to step 8, else skip ahead to step 9.


Step 8: Using the DAC2200 ACU drive the feed assembly to vertical.

8. Press the ‘RIGHT’ arrow key to display cursor to the right of the displayed Pol Value

13. Using the ‘UP & DOWN’ arrow keys to increment & decrement Pol Value, drive the

LNB to achieve a vertical orientation of the LNB as described in Step 7.

Step 9: Verify Pol Pot sprocket is out of alignment with the main driven gear.

Step 10: On the ACU, push

‘ ENTER’ key so that the cursor is not within the Pol display (failure to do this will result in display not changing).

Rotate the pot manually until a count of

120 is achieved.

7-49


Step 11: Reengage Pol Pot gear with the driven gear, while trying to maintain the

120 Pol Value set in step 10 and tighten the mounting plate screw loosened in step 9. (A Pol Value Variance of ± 3 counts is acceptable while trying to reengage the gears)


Step 12: Drive Polang to upper and lower electrical limits and verify drive direction

& full range of motion of feed assembly.

9. On the ACU ‘ RIGHT’ arrow key to display cursor underneath

Pol Value

14. Press the ‘ UP’ key to drive feed fully CW and verify Pol value of 210.

15. Press the ‘ DOWN’ key to drive feed fully CCW and verify

Pol Value of 29.

7-50


Step 13: In the ACU setup menu, go to

Pol Type parameter and set antenna back to Auto Pol Mode:

10. Briefly release and then push and release both

LEFT & RIGHT arrow keys again. The ‘SAVE NEW

PARAMETERS’ window should now be displayed.

16. Push the ‘ UP’ arrow key a few times until the until the ‘Pol

Type’ parameter is displayed.


17. Use the LEFT &

RIGHT arrow keys to display a cursor under appropriate Pol value digits then use the ‘ UP

& DOWN’ arrow keys to change value. Then Press

‘ ENTER’ key. For Auto

Polarization Mode set to Pol

Type to 72. (To put antenna into Manual Polarization Mode set Pol Type to 9)

7.4.15. Removing & Replacing the Feed Tube

Series 04 Vertex Feed Tube replacement procedure

Tools Required:

• ¼” Open Ended Wrench

• 5/64”, 7/64”, and 5/32” Allen Head Wrench

• Snips/ Cutters



7-51


1. Using a ¼” Wrench remove the four 4-40 Small Pattern Hex

Nuts and Washers. Remove

Vertex Feed Tube and set aside.

Save all Hardware for future use.


2. Before installing replacement

Vertex Feed Tube it is necessary to observe orientation of the inner ½ wavelength phase card.

*Orientation can also be observed from outside of feed tube by the 4 (2 each side) protruding white plastic phase card mounting points.

3. Install the replacement Vertex

Feed Tube with the phase card oriented in the horizontal axis

(ref. to reflector).

4. Secure with the Loctite 222 and hardware removed in step 1.

5. Check and/or adjust antenna balance

7.4.16. Balancing the Antenna

The antenna and equipment frame is balanced at the factory however, after disassembly for shipping or maintenance, balance adjustment may be necessary. Balancing must be done with the power supply turned off. No belt removal is required to balance the antenna pedestal. Balancing is accomplished by adding or removing balance trim weights at strategic locations to keep the antenna from falling forward/back or side to side. The antenna system is not pendulous so

'balanced' is defined as the antenna remaining at rest when left in any position. The antenna should be balanced within one or two ounces at the typical trim weight location of 2 feet from the axis of rotation.

7-52


The recommend balancing order is Elevation Axis with the antenna pointed at the horizon (referred to as front to back balance). Elevation Axis with the antenna pointed at zenith (referred to as top to bottom balance). Then Cross Level axis at any elevation position (referred to as side to side balance). The balance about azimuth axis is accomplished by accurately positioning the cross level beam in the azimuth stabilization assembly. This adjustment is done at the factory using special alignment tools. Do NOT attempt to adjust the cross level beam position in the field without the proper test fixtures.

7.5. Pedestal Control Unit Configuration – 6004

The PCU is designed to be used with a variety of antenna pedestal models. So, the PCU must be configured correctly for the model number of the antenna it is mounted on. The configuration information that is unique to each pedestal model is stored in a Non Volatile Random Access Memory (NVRAM) in the PCU enclosure. If the PCU is replaced or the NVRAM in the PCU should become corrupt, the PCU must be reconfigured to operate with the pedestal it is installed on. The default configuration for the PCU is model

xx04. In this configuration the Level Cage will drive normally but the PCU will not drive any of the three

torque motors to prevent damage to the unknown pedestal.

7.5.1. To configure the PCU;

1. Select the REMOTE COMMAND window on the ACU.

2. Refer to the table below to key in the appropriate value for you model antenna to enter in the next step. EXAMPLE: For a 6004 Model Antenna, select system type 0073.

3. Using the LEFT/RIGHT and UP/DOWN arrow keys set the Remote Command value to

" N0073" and press ENTER. The display should now show "N0073".

4. Press ENTER several times to select REMOTE PARAMETERS. Press LEFT arrow and then

ENTER to save the system type in the PCU.

5. Press RESET and the displayed Remote Version Number should now display "6004 VER

2.nn".

7.5.2. Model Configuration Numbers

The following table shows the current mode configuration values for Series 06 pedestals.

MODEL Configuration Number xx03a

6003A or 6004

N 0000 Turns off all drive motors

N 0073

7-53


7.6. Antenna Stowing Procedure

WARNING: Antenna Pedestal must be properly restrained (stowed) to

prevent damage to wire rope isolators, isolator springs and/or antenna pedestal mechanism during underway conditions

when power is removed from the antenna assembly.

The normal operating condition for the Sea Tel Antenna system is to remain powered up at all times. This ensures that the antenna remains actively stabilized to prevent physical damage to the antenna pedestal and reduce condensation and moisture in the radome to prevent corrosion. If, for some reason, the antenna must be powered down during underway transits, it should be secured with nylon straps regardless of sea conditions to prevent damage to the antenna system. Refer to the procedure below to secure the antenna pedestal.

Equipment & Hardware needed:

• Two (2) Nylon web straps with buckle or ratchet mechanism. Nylon straps should be rated to

300 lbs. Max rated capacity.

Stowing procedure:

1. Point the antenna to Zenith, (90 degree elevation angle), straight up.

2. Install one strap through the hole in one side elevation beam, down under the upper base plate, through the other elevation beam hole. Cinch or ratchet the web strap to just restrain the antenna.

3. Install another web strap, or a large tiewrap, around the azimuth tongue counter-weights and down under one corner of the upper base plate to restrain azimuth rotation of the antenna.

CAUTION: Tighten the straps ONLY tight enough to restrain the antenna. When restrained the antenna will only be able to move about an inch in any direction. DO

NOT OVER-TIGHTEN.

NOTE: Remove the straps, and/or Tiewraps, before applying power and returning the antenna to normal operating condition.

7-54

INSTALLATION AND OPERATION MANUAL FOR SEA

7. Troubleshooting and Maintenance

7.1. Warranty Information

7.2. Recommended Preventive Maintenance

7.3. Troubleshooting

7.4. Maintenance

7.5. Pedestal Control Unit Configuration – 6004

7.6. Antenna Stowing Procedure

WARNING: Antenna Pedestal must be properly restrained (stowed) to

when power is removed from the antenna assembly.

Related manuals

Table of contents

INSTALLATION AND OPERATION MANUAL FOR SEA

7. Troubleshooting and Maintenance

7.1. Warranty Information

7.2. Recommended Preventive Maintenance

7.3. Troubleshooting

7.4. Maintenance

7.5. Pedestal Control Unit Configuration – 6004

7.6. Antenna Stowing Procedure

WARNING: Antenna Pedestal must be properly restrained (stowed) to

when power is removed from the antenna assembly.

Related manuals

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ZQ08A10A

Friedrich

ZQ08A10

Sea Tel

DTV04

Sea Tel

9497B-21

Sea Tel

9497B-1

Table of contents