Sea Tel ST88-21 Installation And Operation Manual
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Sea Tel ST88-21 Installation And Operation Manual

Dual c/quad ku-band tvro antenna
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Sea Tel, Inc.
4030 Nelson Avenue
Concord, CA 94520
Tel: (925) 798-7979
Fax: (925) 798-7986
Web:
http://www.cobham.com/seatel
Sea Tel Inc is also doing business as Cobham SATCOM - Maritime
January 20, 2014
INSTALLATION AND OPERATION MANUAL
FOR SEA TEL MODEL
ST88-21 DUAL C/QUAD KU-BAND TVRO ANTENNA
Sea Tel Europe
Unit 1, Orion Industrial Centre
Wide Lane, Swaythling
Southampton, UK S0 18 2HJ
Tel: 44 (0)23 80 671155
Fax: 44 (0)23 80 671166
Web:
http://www.cobham.com/seatel
Document. No. 136464 Revision A1

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  • Page 1 Southampton, UK S0 18 2HJ Fax: (925) 798-7986 Tel: 44 (0)23 80 671155 Web: http://www.cobham.com/seatel Fax: 44 (0)23 80 671166 Web: http://www.cobham.com/seatel Sea Tel Inc is also doing business as Cobham SATCOM - Maritime January 20, 2014 Document. No. 136464 Revision A1...
  • Page 2 Copyright © 2012 Sea Tel Inc All Rights Reserved. The information contained in this document is proprietary to Sea Tel, Inc.. This document may not be reproduced or distributed in any form without prior written consent of Sea Tel, Inc. The information in this document is subject to change without notice.
  • Page 3 Revision History ECO# Date Description April 11, 2012 Initial Production Release January 20, 2014 Update installation text and installation arrangement drawing...

  • Page 5: Table Of Contents

    Table of Contents 1. INTRODUCTION ......................................1-1 1.1................................1-1 ENERAL ESCRIPTION OF SYSTEM 1.2........................................... 1-1 URPOSE 1.3....................................1-1 YSTEM OMPONENTS 1.4................................1-2 NTENNA ONFIGURATION 1.5..................................1-3 NTENNA RBITRATOR 1.6................................1-3 ENERAL SCOPE OF THIS MANUAL 1.7.
  • Page 6 Table of Contents 3.8.5. Sub-assemble the bottom panels onto the base frame ..................3-20 3.8.6. Sub-assemble the Antenna Pedestal ........................... 3-21 3.8.7. Close the 126” Radome Assembly ..........................3-23 3.9. ADE ....................................3-25 OISTING THE 3.9.1. Prepare the 126” Radome ADE for Lift ........................3-25 3.10.
  • Page 7 Table of Contents 6.1. IF T .................................... 6-1 RACKING REQUENCY 6.2........................................6-1 6.3. FEC ..........................................6-2 6.3.1. DVB Receiver ....................................6-2 6.4..........................................6-2 6.4.1. TVRO Applications ..................................6-2 6.5..........................................6-2 6.5.1. TVRO Application ..................................6-2 6.6. NID ..........................................6-3 7.
  • Page 8 Table of Contents 12.2. L ............................. 12-1 ATITUDE ONGITUDE PDATE CHECK 12.3. S – G ........................12-1 EADING OMPASS OLLOWING HECK 12.4. A ................................12-1 ZIMUTH AND LEVATION RIVE 12.5. F ................................12-1 UADRANT RACKING 12.6. B .................................. 12-2 LOCKAGE IMULATION 13.
  • Page 9 Table of Contents 14. ST88-21 TECHNICAL SPECIFICATIONS ..........................14-1 14.1. 8897 A ..................................14-1 NTENNA EFLECTOR 14.2. F ......................................14-1 SSEMBLIES 14.2.1. TVRO-21 Dual C-Band / Quad Ku-Band Feed Assembly ..................14-1 14.3. S ............................14-2 TABILIZED NTENNA EDESTAL SSEMBLY 14.4.
  • Page 10 Table of Contents This Page Intentionally Left Blank...

  • Page 11: Introduction

    ST88-21 C/Ku-Band TVRO Introduction Introduction 1.1. General Description of system Your system is a fully stabilized antenna that has been designed and manufactured so as to be inherently reliable, easy to maintain, and simple to operate. Except for start-ups, or when changing to operate with different transponders or satellites, the equipment essentially permits unattended operation.

  • Page 12: Dual Antenna Configuration

    Introduction ST88-21 C/Ku-Band TVRO Figure 1-1 TVRO Simplified Block Diagram 1.4. Dual Antenna Configuration Sometimes, due to very large blockage conditions, you may need to install a dual antenna configuration to provide uninterrupted services. Two full antenna systems are installed and the ACU control outputs are connected to an arbitrator switch panel which then is connected to the below decks equipment.

  • Page 13: Dual Antenna Arbitrator

    1.6. General scope of this manual This manual describes the Sea Tel Antenna (also called the Above Decks Equipment), its’ operation and installation. Refer to the manual provided with your Antenna Control Unit for its’ installation and operating instructions. 1.7.
  • Page 14 Introduction ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 15: Site Survey

    ST88-21 C/Ku-Band TVRO Site Survey Site Survey There are three objective of the site survey. The first is to find the best place to mount the antenna and the BDE. The second is to identify the length and routing of the cables and any other items or materials that are required to install the system. The third is to identify any other issues that must be resolved before or during the installation.

  • Page 16: Mounting Foundation

    The height of the pedestal should be kept as short as possible, taking into account recommendations given in other Sea Tel Guidelines. The minimum height of the pedestal above a flat deck or platform to allow access into the radome for maintenance should be 0.6 meters (24 inches).

  • Page 17: Mounting Height And Fore-Aft Location

    The effect of tangential acceleration is felt by the structure of the ADE before it truly affects the tracking accuracy. For instance, Sea Tel normally accepts that a tracking error of 0.1 degrees RMS at 0.5 G to be within acceptable error margins.

  • Page 18: Vertical Masts

    Site Survey ST88-21 C/Ku-Band TVRO Often the solution for providing the full azimuth/elevation range the antenna needs is to mount the ADE on the ship’s mast. Unfortunately, masts do not consider equipment masses in design and often have harmonic frequencies of their own.

  • Page 19: Girder Masts

    For every 100 kilograms of ADE weight over 250 kilograms, the depth of the platform stiffeners should be increased by 50 millimeters and thickness by 2 millimeters. Sea Tel does not have a recommended arrangement for a truss mast – the variability of truss mast designs means that each installation needs to be evaluated separately.

  • Page 20: Cables

    The ADE should be installed using good electrical practice. Sea Tel recommends referring to IEC 60092- 352 for specific guidance in choosing cables and installing cables onboard a ship. Within these guidelines, Sea Tel will provide some very general information regarding the electrical installation.

  • Page 21: Acu Power Cable/Outlet

    ST88-21 C/Ku-Band TVRO Site Survey 2.8.4. ACU Power Cable/Outlet The AC power for the ACU and the ADE is not required to be from a UPS (same one that supplies power to the ADE), but it is recommended. Power cable shall comply with the provisions of IEC 60092-350 and -351 in so far as practicable.
  • Page 22 Site Survey ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 23: Installation

    ST88-21 C/Ku-Band TVRO Installation Installation This section contains instructions for unpacking, final assembly and installation of the equipment. It is highly recommended that final assembly and installation of the Antenna system be performed by trained technicians. Read this complete section before starting.

  • Page 24: Site Selection Aboard Ship

    Installation ST88-21 C/Ku-Band TVRO 3.2. Site Selection Aboard Ship The radome assembly should be installed at a location aboard ship where: • The antenna has a clear line-of-sight to view as much of the sky (horizon to zenith at all bearings) as is practical.

  • Page 25: Location Of Items Inside The Crates

    ST88-21 C/Ku-Band TVRO Installation 3.4.1. Location of Items inside the Crates New packing lists for the crates make it easier to locate and unpack the items that are needed to assemble and install the Antenna System. Crate design make it easier to unpack the items from each crate. All bolts, There is no longer any need to mounting the equipment in the crate can be removed from the top side.

  • Page 26: Pedestal Crate

    Installation ST88-21 C/Ku-Band TVRO 3.4.3. Pedestal Crate We recommend that you place the Pedestal Crate in the area that you have chosen to assembly it. This is the Pedestal crate. Remove the outer frame (top and sides of the crate) by removing the...

  • Page 27: Radome Crate

    ST88-21 C/Ku-Band TVRO Installation 3.4.4. Radome Crate: We recommend that you place the Radome Crate in the area that you have chosen to assemble the Radome onto the base frame. This is the Radome crate. Remove the clips around the...
  • Page 28 Installation ST88-21 C/Ku-Band TVRO Remove the lower lag bolts from the “L” brackets (left and right) that hold the reflector support structure legs to the crate. Note: There is one “L” bracket on each side. Only remove the lower lag bolt from the “L” brackets.
  • Page 29 ST88-21 C/Ku-Band TVRO Installation Cut the 2 metal bands holding the base frame in place. Remove the base frame, by hand or with a forklift, out from under the reflector support structure. Move the base frame to the location where it will be assembled.

  • Page 30: Unpacking The Pedestal Crate

    Installation ST88-21 C/Ku-Band TVRO 16. Mount the feed assembly with the Linear drive motor at the bottom strut. Linear Drive Motor Bottom Strut 17. Assemble the Feed Assembly to the feed struts, aligning the labels on the end of the feed strut to the label on the feed assembly.
  • Page 31 ST88-21 C/Ku-Band TVRO Installation Cut the bands holding the DAC and BDE Box (pictured in center). Stage this box where the Below Decks Equipment is temporarily located. Remove the plastic covering over the Pedestal. Important: It is good practice to secure the pedestal with lifting harnesses prior to removing the bolts in the subsequent steps.

  • Page 32: Unpacking The Radome Crate

    Installation ST88-21 C/Ku-Band TVRO 10. Remove the 4 bolts securing the base of the pedestal to the crate deck. Note: These 4 bolts are removed by unbolting them fromONLY on the top side of the crate. There is no longer any need to reach...

  • Page 33: Assembling The Ade

    ST88-21 C/Ku-Band TVRO Installation Remove the straps that restrain the radome cap. Leave the radome cap on the pallet with the radome panels for use during the radome assembly. Use diagonal cutters, or shears, to cut the bands that restrain the Hardware kit in the crate.

  • Page 34: Sub-Assemble The Bottom Panels Of The 126" Radome Assembly

    Installation ST88-21 C/Ku-Band TVRO Place the radome base frame on temporary support blocks, or jack stands, at least 22 inches high. Loosely assemble the eight legs, eight interior braces and four outer braces from the underside of the radome base...
  • Page 35 ST88-21 C/Ku-Band TVRO Installation If only 2 people are available, On a flat surface, adjoin two panels and loosely install a bolt/nut high, mid and low in the adjoined flange. HINT: A crate, or other object, can be put against the panels to hold them up while additional panes are adjoined.
  • Page 36 Installation ST88-21 C/Ku-Band TVRO NOTE: It is extremely important to assure that the flanges are properly aligned before the bolts are tightened and kept in alignment as the hardware is aligned. This is necessary for the inside clearance and the outside aesthetic appearance of the radome.
  • Page 37 ST88-21 C/Ku-Band TVRO Installation Open each seam wide enough to install a good bead of silicone caulk. Working from top to bottom apply Loctite to and then firmly tighten all of the bolts in that seam (smaller dual beads of...

  • Page 38: Sub-Assemble The Upper Panels Of The 126" Radome Assembly

    Installation ST88-21 C/Ku-Band TVRO 12. Attach four radome lifting brackets (PN 122848), or other lifting arrangement, evenly spaced around the bottom of the lower panel assembly. 13. Insert a 1” bolt through a fender washer, down through the bottom flange of one of...
  • Page 39 ST88-21 C/Ku-Band TVRO Installation The person inside now loosely installs the rest of the hardware in all of the flanges. Do NOT tighten the bolts at this time. NOTE: The person who is working inside installing hardware, applying Loctite, tightening hardware and...
  • Page 40 Installation ST88-21 C/Ku-Band TVRO Bad flange alignment Open each seam wide enough to install a good bead of silicone caulk. Working from top to bottom apply Loctite to and then firmly tighten all of the bolts in that seam (smaller dual beads of...
  • Page 41 ST88-21 C/Ku-Band TVRO Installation 10. Apply a 3/8” layer of caulking to the under-side of the perimeter flange of radome cap. 11. (Outside person) Climb onto the upper panel assembly, have someone (third person required only for this step) hand the cap to the person on top of the radome.

  • Page 42: Sub-Assemble The Bottom Panels Onto The Base Frame

    Installation ST88-21 C/Ku-Band TVRO 19. Insert a 1” bolt (no shoulder) through a fender washer, down through the bottom flange of one of the upper panels and thread it into the threaded lip of a radome lifting bracket (or other arrangement).

  • Page 43: Sub-Assemble The Antenna Pedestal

    ST88-21 C/Ku-Band TVRO Installation Use wedges to lift the lower panel assembly up off of the riser panels about ½ inch. Install a good bead of caulking between the bottom of the lower panels and the base frame (smaller dual...
  • Page 44 Installation ST88-21 C/Ku-Band TVRO Using a crane, or other suitable lifting apparatus, lift the pedestal up and onto the stand which was installed in step 1. NOTE: The circuit breaker panel should be oriented to be facing the radome entry hatch (AFT) so that it is within easy reach for powering the equipment OFF.

  • Page 45: Close The 126" Radome Assembly

    ST88-21 C/Ku-Band TVRO Installation 12. Use tie-wraps to attach the reflector harness and coax along the dish strut, around the side of the dish, to the back side of the dish. Assure that you leave sufficient slack in these cables for full rotation of the feed.
  • Page 46 Installation ST88-21 C/Ku-Band TVRO Set the upper section onto the top of the lower panels. Loosely attach the upper panels to the lower panels using the hardware provided. Do NOT tighten the bolts at this time. NOTE: It is extremely important to assure that...

  • Page 47: Hoisting The Ade

    Refer to the Base Frame Assembly drawing for your system and the procedure below. To obtain a Sea Tel recommended lifting harness, please contact the vendor listed below for price and availability. Reference Manufacturer/Sea Tel Part Number: 119792-A 144 Inch Radome Lifting Harness: Lift-It Manufacturing Company 4780 Corona Ave.

  • Page 48: Installing The Ade

    Installation ST88-21 C/Ku-Band TVRO WARNING: Hoisting with other than a webbed four-part sling may result in catastrophic crushing of the radome. Refer to the specifications and drawings for the fully assembled weight of your model Antenna/Radome and assure that equipment used to lift/hoist this system is rated accordingly.

  • Page 49: Install Antenna/Radome/Baseframe

    Assure that the Gyro Compass output is turned OFF when handling and connecting wiring to the Terminal Mounting Strip. CAUTION - Allow only an authorized dealer to install or service the your Sea Tel System components. Unauthorized installation or service can be dangerous and may invalidate the warranty.

  • Page 50: Antenna Control Unit Connections

    Installation ST88-21 C/Ku-Band TVRO 3.12.4. Antenna Control Unit Connections Figure 1-1 Rear Panel DAC-2202 ACU 3.12.4.1. Antenna Control Serial Cable Connected the Antenna Control Serial Cable from the Base Multiplexer to J4A on the DAC-2202. 3.12.4.2. ACU to Terminal Mounting Strip Connections Connect the TMS to the ACU.
  • Page 51 ST88-21 C/Ku-Band TVRO Installation Open provides continuity output (short to ground or open circuit) on the SW2 screw terminal to satellite modem when the modem requires continuity control (short or open) to Mute transmission. In dual antenna configurations this used for dual antenna arbitrators that require continuity control (short or open) to switch.

  • Page 52: Other Bde Connections

    “SEA TEL – RCVR and SCPC VER 5.xx” followed by, “SEA TEL – IO MOD and COMMIF VER 1.xx” followed by, “SEA TEL – REMOTE and INITIALIZING”. After initialization, the bottom line of the remote display will display the antenna model number and the software version from the PCU.

  • Page 53: Other Bde Equipment

    ST88-21 C/Ku-Band TVRO Installation 3.15.3. Other BDE Equipment Refer to the vendor supplied manuals for installation of the other below decks equipment. 3.16. Final Assembly 3.16.1. Remove Stow Braces/Restraints Remove the restraints from the antenna and verify that the antenna moves freely in azimuth, elevation, and cross level without hitting any flanges on the radome.

  • Page 54: Fine Balance And Monitoring Motor Drive Torque

    Installation ST88-21 C/Ku-Band TVRO Then balance Cross Level axis (referred to as left-right balance) by moving existing counter- weights from the left to the right or from the right to the left. Always move weight from one location on the equipment frame to the same location on the opposite side of the equipment frame (ie from the top left of the reflector mounting frame to the top right of the reflector mounting frame).

  • Page 55: Setup

    ST88-21 C/Ku-Band TVRO Installation • The Level display will plot below the reference line when the antenna requires CW drive (Up in elevation). Example: The antenna pictured in the screen capture below is imbalanced so that it is “Front, or Bottom, Heavy”.
  • Page 56 Installation ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 3-34...

  • Page 57: Basic Setup Of The Acu

    ST88-21 C/Ku-Band TVRO Basic Setup of the ACU Basic Setup of the ACU 4.1. Operator Settings Refer to the Operation chapter of this 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.

  • Page 58: Acu Factory Default Parameter Settings - Stxxx-21 Series Antennas

    Basic Setup of the ACU ST88-21 C/Ku-Band TVRO 4.4. ACU Factory Default Parameter Settings – STxxx-21 Series Antennas The following table shows the factory default parameters for the ACU interfaced to a ST-21 Series Antenna. You may need to optimize some of these parameters. Refer to the individual parameter setting information in the Setup section of your ACU manual.

  • Page 59: Setup - Ships Gyro Compass

    ST88-21 C/Ku-Band TVRO Setup – Ships Gyro Compass Setup – Ships Gyro Compass The Ships Gyro Compass connection provides true heading (heading of the ship relative to true North) input to the system. This allows the ACU to target the antenna to a “true” azimuth position to acquire any desired satellite.
  • Page 60 Setup – Ships Gyro Compass ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 61: Determine Internal Tracking Receiver Settings

    ST88-21 C/Ku-Band TVRO Determine Internal Tracking Receiver Settings Determine Internal Tracking Receiver Settings This lesson contains some general information on how to determine, obtain, and enter the antenna control units tracking receiver settings. 6.1. IF Tracking Frequency The IF Tracking parameter is a calculated value entered into the ACU’s FREQ Sub-Menu. The value itself is calculated by using the formula RF- LO = IF.

  • Page 62: Fec

    The Tone state entered into the ACU will be toggled either on or off. Although there are many possibilities of uses of a 22 KHz tone, in a Sea Tel TVRO antenna system it is primarily used for below decks band selection (Tone On = Ku Hi-Band and Tone Off = Ku Lo-Band) and is based on the Downlink RF value from the satellite.

  • Page 63: Nid

    ST88-21 C/Ku-Band TVRO Determine Internal Tracking Receiver Settings 6.6. The Network Identification parameter entered into the ACU is a hexadecimal value based on the Downlink RF from the satellite. When using a Public Satellite Reference Site such as Lyngsat.com or Satellite Reference Software such as WWW.Lyngsat.com, the NID values are presented in decimal format and thus a conversion to hexadecimal format is...
  • Page 64 Determine Internal Tracking Receiver Settings ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 65: Setup - Home Flag Offset

    ST88-21 C/Ku-Band TVRO Setup – Home Flag Offset Setup – Home Flag Offset Home Flag Offset is used to calibrate the relative azimuth value of the antenna to the bow line of the ship. This assures that the encoder input increments/decrements from this initialization value so that the encoder does not have to be precision aligned.

  • Page 66: You Observe "Home" Pointing Is Left Of The Bow-Line

    Setup – Home Flag Offset ST88-21 C/Ku-Band TVRO If AZ TRIM was a plus value: HFO = (TRIM / 360) x 255 Example: AZ TRIM was 0200 (plus 20 degrees). HFO = (20/360) x 255 = (0.0556) x 255 = 14.16 round off to 14. Set, and Save, HFO to 014 using the “To Enter the HFO value”...

  • Page 67: To Enter The Hfo Value In The Dac_2202

    ST88-21 C/Ku-Band TVRO Setup – Home Flag Offset “home” was to the right of bow) this difference of 09.0 to the bow line position 000.0. Therefore “home” should be 90.0 Relative. I now calculate the HFO = = ((90.0) / 360)) x 255 = 0.25 x 255 = 63.75 which I round off to 64.
  • Page 68 Setup – Home Flag Offset ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 69: Setup - Targeting

    ST88-21 C/Ku-Band TVRO Setup – Targeting Setup – Targeting The procedure for optimizing the targeting of the antenna to land on or near a desired satellite (within +/-1 degree) is outlined below. 8.1. AUTO TRIM The Auto Trim function will automatically calculate and set the required Azimuth and Elevation trim offset parameters required to properly calibrate the antennas display to the mechanical angle of the antenna itself, while peaked ON satellite.

  • Page 70: El Trim

    Setup – Targeting ST88-21 C/Ku-Band TVRO 8.3. EL TRIM Elevation trim offset parameter is entered in tenths of degrees. Adjusts display to correct for antenna alignment errors or imbalances in the antenna system. Increase number to increase display. Refer to “Optimizing Targeting” in the Setup section of your antenna manual.

  • Page 71: Setup - Searching

    ST88-21 C/Ku-Band TVRO Setup – Searching Setup – Searching 9.1. Searching Operation The ACU will initiate an automated search pattern after AGC falls below the current Threshold setting (indicates that satellite signal has been lost). The SEARCH DELAY parameter sets the amount of delay, in seconds that the ACU will wait after AGC has fallen below the threshold value before it starts a search.

  • Page 72: Inclined Orbit Search Pattern

    Setup – Searching ST88-21 C/Ku-Band TVRO 9.1.2. Inclined Orbit Search Pattern Some older satellites, in order to save fuel to keep them exactly positioned over the Equator, are in an inclined geosynchronous orbit. The satellite remains geosynchronous but is no longer geostationary. From a fixed observation point on Earth, it would appear to trace out a figure-eight with lobes oriented north- southward once every twenty-four hours.

  • Page 73: No Gyro Search Pattern

    ST88-21 C/Ku-Band TVRO Setup – Searching 9.1.3. No Gyro Search Pattern If the ship does not have a gyro compass to use as a heading input to the Antenna Control Unit, you may manually key in the actual heading of the vessel and then re-target the desired satellite, every time you need to re-target a satellite, or configure the ACU to do a “No Gyro Search Pattern”.

  • Page 74: Changing The Search Parameters

    Setup – Searching ST88-21 C/Ku-Band TVRO 9.2. Changing the Search Parameters The information above described what some of these parameters need to be set to for a specific search pattern. Below are some additional pieces of information on the other parameters and the steps to change any one of these parameters.

  • Page 75: Search Inc

    ST88-21 C/Ku-Band TVRO Setup – Searching 9.2.5. SEARCH INC Sets size of search pattern increment. Units are in pedestal step resolution (24 steps per degree). The suggested setting is equal to the full 3dB beamwidth of your antenna. Default value is 30 these systems.
  • Page 76 Setup – Searching ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 77: Setup - Blockage & Rf Radiation Hazard Zones

    BLOCKED condition to test SW2 logic output. When used as simple “BLOCKED” logic output for a single Sea Tel antenna, this output could be used to light a remote LED and/or sound a buzzer to alert someone that the antenna is blocked, and therefore signal is lost.
  • Page 78 ST88-21 C/Ku-Band TVRO When used for “FCC TX Mute” logic output for a single Sea Tel TXRX antenna, this output is used to suppress RF transmissions whenever the antenna is mis-pointed 0.5 degrees or more, is blocked, searching, targeting or unwrapping.
  • Page 79 0000. If your ACU software includes 5 volt polarization you will not see these AZ & EL LIMIT parameters. 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.
  • Page 80 0000. If your ACU software includes 5 volt polarization you will not see these AZ & EL LIMIT parameters. EXAMPLE 4 - 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.

  • Page 81: Setup

    ST88-21 C/Ku-Band TVRO Setup Setup Below are basic steps to guide you in setting up the ACU for your specific antenna pedestal. Assure that the Antenna Pedestal (ADE) has been properly installed before proceeding. Refer to the Setup section of you ACU manual for additional parameter setting details.

  • Page 82: Tx Polarity Setup

    Setup ST88-21 C/Ku-Band TVRO 11.5. TX Polarity Setup 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). If the transmit polarity in the center of the travel range is vertical, use the following entries:...

  • Page 83: Functional Testing

    ACU / Antenna System Check Press RESET on the ACU front panel to initialize the system. Verify the display shows "SEA TEL INC - MASTER" and the ACU software version number. Wait 10 seconds for the display to change to "SEA TEL INC - REMOTE"...

  • Page 84: Blockage Simulation Test

    • When used as simple “BLOCKED” logic output for a single Sea Tel antenna, this output could be used to light a remote LED and/or sound a buzzer to alert someone that the antenna is blocked, and signal is lost.

  • Page 85: Maintenance And Troubleshooting

    13.1. Warranty Information Sea Tel Inc. supports its antenna systems with a TWO YEAR warranty on parts and ONE YEAR warranty on labor. What’s Covered by the Limited Warranty? The Sea Tel 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...

  • Page 86: Azimuth & Elevation Drive

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 13.2.4. Azimuth & Elevation Drive Refer to the Azimuth & Elevation Drive check procedure in the Functional Testing section of this manual. 13.2.5. Test Tracking Refer to the four quadrant Tracking check procedure in the Functional Testing section of this manual.

  • Page 87: 400Mhz Modem Configuration

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.3. 400MHz Modem Configuration The 400MHz FSK modem PCB has a jumper block (located component side of PCB) that is used to configure it for Above Decks or Below Decks operation as well as to configure its’ serial communications protocol (RS232, RS422, or RS485).

  • Page 88: Mh Zled Indicators

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO Below 2 Wire RS485 Decks (Half Duplex) 9-10 13.4. 400 MHz LED indicators For diagnostic purposes, the 400MHz FSK modem assemblies have an LED Indicator (located to the on the bottom left hand side of the enclosure for BDE modems and directly underneath the rotary joint port on the 09 Series PCU). By observing the amount of amber colored flashes during power up, the modems configuration may be established.

  • Page 89: Radio M&C

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.5.2. Radio M&C The RS-232, RS-422, or RS-485 (depending on configuration) Radio M&C signals pass from the BDE computer through the RF M&C port of the base modem and are modulated and demodulated. These M&C signals are diplexed with the pedestal M&C signals before passing through to the above decks modem.

  • Page 90: Troubleshooting 400Mhz Modem Communication Faults

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 13.6. Troubleshooting 400MHz Modem Communication Faults 13.6.1. 400MHz Modem Queries: The 400MHz modem assemblies facilitates the use of line-based commands via the ACU’s front panel, its’ internal HTML page, or using remote diagnostic software such as DacRemP or ProgTerm. The use of these commands will aid in troubleshooting communication failures between the above decks and below decks modems.
  • Page 91 ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.6.2.1. Using the ACU Front Panel Using the ACU’s Front Panel, navigate through the Setup menu to access the Remote Command Sub-Menu. Enter in the desired Modem Query then press the ENTER key. Observe and/or Record the displayed response.
  • Page 92 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO Observe and/or Record the displayed response. Repeat as required until all desired modem queries are noted. 13.6.2.4. Using ProgTerm Open up ProgTerm and select the Tools Menu. Select “Modem Tools”. Select the desired modem location.

  • Page 93: Isolating A 400 Mhz Modem Fault Procedure

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.6.3. Isolating a 400 MHz Modem Fault Procedure: Issue “<0000” and “>0000” queries to the ADE and BDE modems and record the responses. ADE (>0000)______________ BDE (<0000)______________ Compare your recorded responses to the list below to determine what modem fault(s) (if any) is present.
  • Page 94 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO BDE Modem to connector bracket (Base Rack Panel Assembly) (CFE) BDE to ADE Rx IF (Base Rack Panel to radome Connector bracket) Rx N to SMA Adapter (Located on connector bracket at radome base)

  • Page 95: Troubleshooting

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting If 465.0MHz Transmit Beacon is present, the fault is the BDE modem. If 465.0MHz Transmit Beacon is NOT present fault is with the ADE modem. 13.6.3.1.7. BDE Transmit or ADE Receive (PED M&C): •...

  • Page 96: Series Dual C-Band Or Quad Ku-Band Tvro Rf Flow

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 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. 13.7.2. ST-21 Series Dual C-Band OR Quad Ku-Band TVRO RF Flow Refer to the System Block Diagram in the Drawings section of this manual.

  • Page 97: Antenna Loop Error Monitoring

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting Cross-Level sensor is used to drive Cross-Level of the equipment frame to bring it to level (this results in the tilt of the Cross-Level Beam being level). Step 2. Azimuth axis activates - Antenna drives CW in azimuth until the “Home Flag” signal is produced.

  • Page 98: Reference Sensor Testing

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO • 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 •...

  • Page 99: Reference Sensor Monitoring

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.7.6. 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°...

  • Page 100: Open Loop Rate Sensor Monitoring

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 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. 13.7.7. Open Loop Rate Sensor Monitoring The DacRemP DISPW graph chart provides a means for monitoring the output of the three solid state rate sensors (located inside the level cage assembly) for diagnostic purposes.

  • Page 101: Open Loop Motor Test

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.7.8. 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.

  • Page 102: To Read/Decode An Acu Error Code 0008 (Pedestal Function Error)

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 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.
  • Page 103 ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting Left mouse click on the icon. Right mouse click on the icon. This will display a list box with the status of the above decks pedestal filtered into 3 sections. Items preceded with a check marks indicate a flagged status.
  • Page 104 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO State Description PCU Status (Word 1) Slow Scan Indicates antenna is in a specialized mode, Slow Scan, which is required when ever a test requires driving the antenna >5°/sec Sat Reference Indicates that satellite reference mode is enabled.

  • Page 105: Remote Gps Lat/Lon Position

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.7.12. 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, Cross-level and Polarity pointing angles of the desired satellite.

  • Page 106: Maintenance

    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.

  • Page 107: Remote Tilt

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting one location on the equipment frame to the same location on the opposite side of the equipment frame (ie from the top left of the reflector mounting frame to the top right of the reflector mounting frame).

  • Page 108: To Reset/Reinitialize The Antenna

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO Left arrow will rotate antenna mass down to the left in the Cross-Level axis ½ degree Right arrow will rotate antenna mass up to the right in the Cross-Level axis ½ degree Up arrow will rotate antenna mass up in the Level axis ½ degree Down arrow will rotate antenna mass down in the Level axis ½...

  • Page 109: Pedestal Control Unit Configuration - Stxxx-21 Series

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 13.9. Pedestal Control Unit Configuration - STxxx-21 Series The PCU is designed to be used with a variety of antenna pedestal configurations. The configuration information that is unique to each pedestal type 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 re-configured to operate with the pedestal it is installed on.

  • Page 110: Antenna Stowing Procedure

    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.
  • Page 111 ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting Hook the other end hook of the nylon strap to the pedestal- mounting frame as shown in Figure 3. Use the ratchet of the strap to tighten nylon straps. As the straps are tightened, observe the vertical isolation canister assembly as shown in Figure 4.
  • Page 112 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 13-28...

  • Page 113: St88-21 Technical Specifications

    ST88-21 C/Ku-Band TVRO ST88-21 Technical Specifications ST88-21 Technical Specifications The technical specifications for your Series Above Decks Equipment subsystems are listed below: Refer to your ACU manual for its’ Specifications. 14.1. 8897 Antenna Reflector Type: Hydro-Formed aluminum parabola Diameter (D): 2.1 M (82 in.)

  • Page 114: Stabilized Antenna Pedestal Assembly

    ST88-21 Technical Specifications ST88-21 C/Ku-Band TVRO 14.3. Stabilized Antenna Pedestal Assembly Type: Three-axis (Level, Cross Level and Azimuth) Stabilization: Torque Mode Servo Stab Accuracy: 0.3 degrees MAX, 0.15 degrees RMS in presence of specified ship motions (see below). LV & CL motors: Size 34 Brushless DC Servo motor with integrated brake.

  • Page 115: Mk 2 Pedestal Control Unit (Pcu)

    ST88-21 C/Ku-Band TVRO ST88-21 Technical Specifications 14.4. MK 2 Pedestal Control Unit (PCU) The PCU Assembly contains 3 Printed Circuit Boards (PCBs). Connectors AC Power 100-240 VAC, 2A-1A Mini USB GPS Input RJ-11 connector Motor Control DA-15S connector 70/140 MHz...

  • Page 116: Mh Z Base & Pedestal Unlimited Azimuth Modems (3 Channel )

    Withstand relative average winds up to 100 MPH from any direction. Ingress Protection Rating All Sea Tel radomes have an IP rating of 56 NOTE: Radome panels can absorb up to 3-55% moisture by weight. Soaked panels will also have higher attenuation.

  • Page 117: Environmental Conditions (Ade)

    Due to the dB losses across the length of the RF coaxes at L-Band, Sea Tel recommends the following 75 ohm coax, or Heliax, cable types (and their equivalent conductor size) for our standard pedestal installations:...

  • Page 118: Gyro Compass Interface Cable (Customer Furnished)

    ST88-21 Technical Specifications ST88-21 C/Ku-Band TVRO 14.9.4. Gyro Compass Interface Cable (Customer Furnished) Type: Multi-conductor, Shielded Number of wires 4 Conductors for Step-By-Step Gyro, 5 Conductors for Synchro Wire Gauge: see Multi-conductor Cables spec above Insulation: 600 VAC 14.9.5. Fiber Optic Transmitter (CFE Optional)

  • Page 119: Model St88-21 Drawings

    15.1. Model ST88-21 Specific Drawings Drawing Title 136756-1_A System, Model ST88-21 15-3 135626-3_A1 System Block Diagram – Model ST88-21 15-5 136757-1_A General Assembly – Model ST88-21 15-8 135625_A1 Antenna System Schematic – Model ST88-21 15-10 136759-1_A Antenna Assembly, 2.0M, Dual C/Quad Ku...
  • Page 120 Model ST88-21 Drawings ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 15-2...
  • Page 121 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 136757-1 GENERAL ASS'Y, ST88-21 1 EA 111678-9 RADOME ASS'Y, 126 INCH, WHITE/SIDE AC 1 EA 123723-1 D RADOME BASE ASS'Y, 75 IN., STL, NO AC 1 EA 125411-2 M1 DAC-2202, DVB RCVR, 9 WIRE IF PL C1 B3 SN DAC&BDE_Box...
  • Page 122 Sea Tel - Strictly Confidential & Proprietary. Do Not Copy, Distribute or Disclose Without Prior 1:18 136756 Written Approval From Sea Tel. ST88-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 123 CABLE ASS'Y, RG-179 COAX, F TO F(RA), 1 EA 127963-60WHT CABLE ASS'Y, RG-179 COAX, F TO F(RA), 6 EA 109391 ADAPTER, F(F)-F(F) (BULLET), 0.84 IN 1 EA 127968-1 A1 ROTARY JOINT, 4RF-2DC SYSTEM BLOCK DIAGRAM, ST88-21 PROD FAMILY EFF. DATE DRAWING SHT 1 OF 4/10/2012 NUMBER...
  • Page 124 1 EA 116298-1 G INTERFACE HARNESS ASS'Y, SINGLE MODEM 1 EA 120643-25 CABLE ASS'Y, RS232, 9-WIRE, STRAIGHT, 1 EA 119479-10 B1 CABLE ASS'Y, CAT5 JUMPER, 10 FT. SYSTEM BLOCK DIAGRAM, ST88-21 PROD FAMILY EFF. DATE DRAWING SHT 2 OF 4/10/2012...
  • Page 126 ELECT. EQ. FRAME ASS'Y, STXX-21 PL C3 I1 w/136765-1,2 Pedestal_Crate 1 EA 136759-1 ANTENNA ASS'Y, ST88-21 1 EA 136758-1 BALANCE WEIGHT KIT, ST88-21 1 EA 121655-1 H8 LABELS INSTALLATION, XX97, 9711 PL C3 I1 w/136765-1,4 Pedestal_Crate 1 EA 123530-4 GROUND BONDING KIT, XX97, TVRO...
  • Page 127 Sea Tel - Strictly Confidential & Proprietary. Do Not Copy, Distribute or Disclose Without Prior 1:12 136757 Written Approval From Sea Tel. ST88-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 129 WASHER, FLAT, 3/8, S.S. ( 7/8 OD X 13 PL C2 B2 I1 w/PkgTg_2/3,2 Reflector_HW_Box Base&Refl_Crate 8 EA 114583-031 NUT, HEX, 3/8-16, S.S. PL C2 B2 I1 w/PkgTg_3/3,3 Reflector_HW_Box ANTENNA ASS'Y, ST88-21 PROD FAMILY EFF. DATE DRAWING SHT 1 OF COMMON 4/10/2012 NUMBER...
  • Page 130 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR Base&Refl_Crate ANTENNA ASS'Y, ST88-21 PROD FAMILY EFF. DATE DRAWING SHT 2 OF COMMON 4/10/2012 NUMBER 136759-1...
  • Page 131 C-BAND; 37.8 dB Do Not Copy, Distribute or Disclose Without Prior 1:14 136759 Written Approval From Sea Tel. KU-BAND; 46.6 dB ST88-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 132 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 116286-5 OMT, DUAL BAND, 4-PORT 2 EA 134164-1 LNB, C-BAND, DRO, 8225RF PL C2 B4 I1 SN w/135631- 1,1 Feed_Assy_Box Pedestal_Crate 1 EA 123648-1 D SCALAR PLATE ASS'Y, C/KU-BAND, RX ONL PL C2 B4 I1 w/135631-1,3 Feed_Assy_Box...
  • Page 133 Sea Tel - Strictly Confidential & Proprietary. Do Not Copy, Distribute or Disclose Without Prior 135631 Written Approval From Sea Tel. 14400MK2-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 134 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 131057-3 E1 ENCLOSURE ASS'Y, PCU, 09G2, 3 CH, 422 1 EA 134130 A1 MOUNTING PLATE, TVRO SWITCH 1 EA 128204-1 RF SWITCH ASSEMBLY 1 EA 131227-1 ENCLOSURE ASS'Y, MOTOR DRIVER, 09G2 4 EA 135639 A1 BAR, MK2 PCU MOUNTING, TVRO...
  • Page 135 DETAIL A Do Not Copy, Distribute or Disclose Without Prior 1:10 135632 Written Approval From Sea Tel. SCALE 1 : 2 14400MK2-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 136 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 115931-9 C4 RADOME FAB ASS'Y, 126 INCH, WHITE/FOA 1 EA 124818-2 HARDWARE KIT, MULTI-PANEL RADOME, 126 NOT SHOWN 12 EA 117762-1 SILICONE ADHESIVE, WHT RTV 122, 10.1 PL C1 B2 DC Radome_ACC_Box Radome_Crate...
  • Page 138 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 123724-1 D RADOME BASE FRAME ASS'Y, 75 IN, STEEL 1 EA 123726-1 C1 RADOME BASE PAN FAB, 75 IN, WHITE PL C2 I1 w/123724-1,1 Base&Refl_Crate 1 EA 123726-1 C1 RADOME BASE PAN FAB, 75 IN, WHITE...
  • Page 139 71 72 70 72 61 62 62 63 EXTERNAL AC/ NO AC (BASE CROSS) NOTES: UNLESS OTHERWISE SPECIFIED INSTALLED WITH ITEM 2 AT SEA TEL. NO AC CONFIG. SHOWN USE DRAWING INCONJUNCTION WITH P/N: 131733-1 IN P/N: 124822-1. APPLY ADHESIVE PER SEA TEL SPEC. 121730.
  • Page 140 80 81 82 83 INTERNAL AC (SPIDER MOUNTING BASE) SIZE SCALE: DRAWING NUMBER 123723 2 OF 2 SHEET NUMBER...
  • Page 144 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 116880 G PANEL MACHINING, RACK, BASE MUX 1 EA 130854-2 MODEM ASS'Y, 400MHZ FSK, 4CH,BDE, RS 1 EA 118429 O BRACKET, CONNECTOR 1 EA 128001-8BLU A2 CABLE ASS'Y, RG-179 COAX, F(M) TO SMA 5 EA 114178 O ADAPTER, F(F)-F(F) (BULLET), 1.10 IN...
  • Page 145 Sea Tel - Strictly Confidential & Proprietary. Do Not Copy, Distribute or Disclose Without Prior 1:1.5 131857 Written Approval From Sea Tel. 14400B-21 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...

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