COBHAM SAILOR 800 VSAT Manuale per l'uso e la cura

Field

Replacement

Procedure

Following legal entities are trading as / doing

business as Cobham SATCOM

Thrane

and Thrane A/S, Kgs. Lyngby, Denmark

Sea Tel Inc., Concord USA

TracStar Systems

Inc., Orlando, USA

Omnipless Manufacturing (Pty) Limited, Cape Town, RSA

www.cobham.com/satcom

SAILOR 800, 900A & 900B VSAT– Polarization Motor Procedure

Brief Summary:

Troubleshooting document for inspecting and replacing the polarization motor (S-62-134493) on the

SAILOR 800 (7008A), 900A (7009A) and 900B (7009B) VSAT antennas.

Checklist:

Status LEDs

Events List / Error Log. Identify Defective Part

Replace Part

Verify Initialization and Run POST Test

Theory of Operation:

A stepper motor is installed on the rear of the dish of the SAILOR 900 VSAT antenna to rotate the

polarization unit through its 270 degree range of motion.

A zero reference point (magnet) is installed in the drive pulley of the polarization as a reference

position. When the system is energised the stepper motor will drive the polarization unit from one end

stop to the other with the hall effect sensor on the Zero Reference Module (ZRM) reading the

magnetic forces in each direction and taking a mean value as a reference position.

Upon initialization the encoder on the polarization unit will be calibrated based on the axis’s zero

reference position and will increment/decrement the drive steps made by the polarization motor.

When targeting a linear satellite the polarization motor will drive the polarization unit until it reaches

the calculated position, based on the vessels GPS position and the look angle to the satellite. At this

point the encoder will be outputting the desired target value, meaning that the Ortho-Mode

Transducer (OMT) is correctly aligned to the linear receive and transmit signals of the satellite for

maximum signal strength and quality.

As the vessels sails and the GPS position changes small adjustments will need to be made to the angle

of the polarization unit to maintain alignment with the linear satellite signal. This will cause the value

the Pedestal Control Module (PCM) is expecting from the encoder to change, meaning the PCM will

issue the command to drive the polarization motor until the correct feedback from the encoder is

received.

Cobham SATCOM

Global Customer Service dept.

Document no.: 97-139037-C

Revision: C

Date: April 2013

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Troubleshooting - Diagnostic LEDs on the ACU:

The ACU has 3 LEDs: Power, Logon and Fail/Pass.

Verify the status of the unit by referencing the LEDs. If any of the LEDs are not steady green or

flashing green then further diagnostics will need to be undertaken, referencing the below table:

If the Fail/Pass LED is illuminated any colour other than steady green then it means there is an issue

with the system. Log into the ACU using your web browser and refer to the systems event log as

detailed in the following sections of this document.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Log into the Antenna Control Unit (ACU):

1. Connect a straight through Ethernet cable from the LAN port of your laptop to the LAN port of

the ACU.

2. Open the “Network and Sharing Center” on your laptop and select “Change Adaptor Settings”.

3. Right-Click the LAN adaptor for your laptop and select the “Properties” tab.

Continued…

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

4. Double click the “Internet Protocol Version 4 (TCP/IPv4)” Option.

5. The Select the “Use the following IP address” button and enter in an IP address of “192.168.0.2”

and a Subnet Mask of “255.255.255.0”.

6. Now click the OK button on both the “IP Protocol Version 4 (TCP/IP)” window and the “Local

Area Connection Properties” window.

7. Open your web browser and enter the IP address “192.168.0.1”, then press the enter button.

Continued…

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

8. You’ll now have access to the systems “DASHBOARD”.

9. The following procedure will tell you how to access the events list and diagnose any errors or

warnings with the system.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Troubleshooting – Event List:

When an event is registered the web interface shows an event icon “ ” in the icon bar as long as

the event is active, the ACU display also shows active events.

To view the event list with active events click the event icon from the icon bar ( ) at the top of the

web interface or select “HELPDESK” and then “Event list” from the navigation pane on the left of the

user interface.

The Events List page then shows a list of active events and notifications including:

The time and date of the first occurrence (Time UTC)

The event code (ID)

The severity of the event message (Severity)

A description describing the event (Text)

For a more comprehensive diagnosis of the event displayed reference the error and event codes

document, document number: 97-139344-A. Once diagnosed replace the defective component and

run the Power On Self Test (POST) and verify the operation of the system.

*Note: Active events are cleared from the event list when the error is cleared. They are then moved

to the notifications section and are displayed there with the severity, after 24 hours the notifications

are then cleared or after the system is restarted.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Replacing the Polarization Motor:

Tools needed:

•Torx TX20 Screwdriver

•4mm Allen Key (provided in the radome hatch, part number: S-47-206968-004)

Flat-head Screwdriver

1. Open the service hatch by releasing the two

latches using a Torx TX20 screwdriver (if applicable).

2. Rotate the antenna pedestal so that the arm with

the GPS antenna faces the service hatch.

3. Switch off the power to the antenna using the

service switch, located on the rear of the pedestal.

4. Rotate the antenna dish to 90 degrees of elevation

(facing upwards).

5. Press in and turn the elevation locking pin to the

locked position (if applicable).

6. Remove the connector marked “M” from the PMM.

7. Now disconnect the D-Sub connector from the

PMM using a small flat-head screwdriver.

8. Disconnect the two RF F-connectors from the LNBs

using an 11mm spanner. Mark the LNBs after the

label on the wires: Co-pol (left) and X-pol (right).

9. Disconnect the transmit N-connector.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

10. Remove the four 4mm Allen screws to free the

cable spool attached to the PMM, using the 4mm

Allen key provided in the radome hatch. Let the cable

spool hang freely, retain the hardware for future use.

You can now access the polarization motor.

11. Disconnect the power connector of the

polarisation motor.

12. Remove the four 4mm Allen screws that hold the

motor, retain the hardware for future use.

13. Remove the defective polarisation motor.

14. To insert a new polarisation motor follow the

instructions above in reverse order.

15. Once the replacement polarization motor has

been installed verify that the antenna passes the

Power On Self Test (POST) as per the following

procedure.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Troubleshooting - Verify the Initialization of the Pedestal:

After replacing the defective component re-initialize the pedestal and verify its operation. First switch

off the power to the antenna using the service switch, located on the rear of the pedestal:

Then restart the pedestal by pressing and holding the and arrows on the ACU together:

Now view the pedestal through the service hatch and switch on the service switch located on the rear

of the pedestal. Now verify the Initialization process is as follows:

1. The elevation axis will drive from end-stop to end-stop and then to its zero reference point, with

the reflector at 45 degrees.

2. The cross-elevation then drives from end-stop to end-stop and then to its zero reference point,

level with the horizon.

3. Then the azimuth axis drives one direction and then back on itself before settling at its zero

reference point, with the antenna facing away from the service hatch.

4. And finally the polarization unit then drives from end-stop to end-stop (270 degrees) and then

back to its zero reference point, at which point the polarization motor module will be at the

highest point of the polarization unit with the LNB coax cables pointing left.

*Note: Any errors during the Power On Self Test (POST) will make the system go to safe mode,

dropping the ADU power from 48VDC to 20VDC and making the DC-Motor Drive Modules (DDM)

status LEDs illuminate red.

A minor issue with the POST may enable the system to operate, with the Antenna Control Unit (ACU)

displaying a warning. If the Pass/Fail LED is illuminated on the ACU, refer to the error log for further

information.

5. The system will then go into ‘ready mode’, expecting to get data from the satellite modem.

6. The satellite data is then sent from modem and will be displayed on the systems dashboard.

7. The Above Deck Unit (ADU) then goes from pointing the antenna to then acquiring the signal,

and finally into tracking mode.

8. Verify the system completed the initialization process correctly and that no errors were flagged

by the POST.

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Spare Part Instruction – SAILOR 800 & 900 Pol Motor

Document No.: 97-139037-C

Revision: C

Troubleshooting - Self Test:

You can run a self test on the ACU and ADU of the antenna system.

1. From the “HELPDESK” page, click the “Self test” option.

2. The system will now run the Self test.

3. Ensure the test is completed with no errors.

4. If any errors are displayed refer to the “ACU Error Messages” section of this document for further

information.

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