Sea Tel ST88-21 C/Ku-Band TVRO Installation And Operation Manual
  1. Manuals
  2. Brands
  3. Sea Tel Manuals
  4. Antenna
  5. ST88-21 C/Ku-Band TVRO
  6. Installation and operation manual

Sea Tel ST88-21 C/Ku-Band TVRO Installation And Operation Manual

Dual c/quad ku-band tvro antenna
Hide thumbs Also See for ST88-21 C/Ku-Band TVRO:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operation & Installation Manual
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 Antenna Systems
April 11, 2012
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 A

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ST88-21 C/Ku-Band TVRO and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Sea Tel ST88-21 C/Ku-Band TVRO

Summary of Contents for Sea Tel ST88-21 C/Ku-Band TVRO

  • 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 Antenna Systems April 11, 2012 Document. No. 136464 Revision A...
  • 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 The Equipments Maker / Supplier have to declare if his equipment / equipments contain any of the hazardous material listed below with concentration and duly signed and stamped. Vessel Name/Hull Number/Shipyard: Equipment Details: All Sea Tel manufactured antenna systems. Supplier Details: Sea Tel, Inc 4030 Nelson Ave Concord, CA.
  • Page 4 Other Substances inherent in the machinery, equipment or fittings of supplied system Type Equipments/Components Location (If Applicable) Approximate contain such materials quantity/volume Lubricating Oil Hydraulic Oil Lead Acid Batteries Alcohol Methylated Spirits Epoxy Resins Mercury Radioactive Materials Other (Specify) Copyright © Sea Tel, Inc 2011 Document Number 136150 rev A...
  • Page 5 All of the plastics used on Sea Tel antenna systems are completely inert and pose no harm when in use or when scrapped. All of the lubricating oils used on Sea Tel antenna systems are completely inert and pose no harm when in use or when scrapped.

  • Page 7: 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 8 Table of Contents 3.5.3. Installing the Below Deck Equipment ..........................3-7 3.6............................3-8 ONNECTING THE ELOW ECKS QUIPMENT 3.6.1. Connecting the ADE AC Power Cable ..........................3-8 3.6.2. Connecting the BDE AC Power Cables .......................... 3-8 3.6.3. Connecting the ADE IF Coaxes ............................3-8 3.6.4.
  • Page 9 Table of Contents 7.1.1. You Found a Large AZ TRIM value: ..........................7-1 7.1.2. You Observe “Home” Pointing is LEFT of the Bow-line: ..................7-2 7.1.3. You Observe “Home” Pointing is RIGHT of the Bow-line: ..................7-2 7.1.4. To Enter the HFO value in the DAC_2202: ........................7-3 8.
  • Page 10 Table of Contents 13.2.4. Azimuth & Elevation Drive ..............................13-2 13.2.5. Test Tracking .................................... 13-2 13.2.6. Visual Inspection - Radome & Pedestal ........................13-2 13.2.7. Mechanical Checks ................................13-2 13.2.8. Check Balance ..................................13-2 13.2.9. Observe Antenna Initialization ............................13-2 13.3.
  • Page 11 Table of Contents 14.9.1. Antenna Control Cable (Provided from ACU-MUX) ....................14-5 14.9.2. Antenna L-Band TVRO IF Coax Cables (Customer Furnished) ............... 14-5 14.9.3. AC Power Cable (Pedestal & Rf Equipment) ......................14-5 14.9.4. Gyro Compass Interface Cable (Customer Furnished) ..................14-6 14.9.5.
  • Page 12 Table of Contents This Page Intentionally Left Blank...

  • Page 13: Introduction

    ST88-21 C/Ku-Band TVRO Introduction Introduction 1.1. General Description of system Your Series 00 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 14: 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 15: 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 16 Introduction ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 17: Site Survey

    ST88-21 C/Ku-Band TVRO Site Survey Site Survey The objective of the Site survey is to find the best place to mount the antenna & the below decks equipment, the length and routing of the cables and any other items or materials that are required to install the system and identify any other issues that must be resolved before or during the installation.

  • Page 18: 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 19: 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 20: Mast Configurations

    2.5. Mast Configurations Sea Tel recommends the ADE be mounted on the ship in a location which has both a clear line-of-sight to the target satellites in all potential azimuth/elevation ranges and sufficient support against vibration excitement. If possible, mounting the ADE pedestal directly to ship deckhouse structures or other box stiffened structures is preferred.

  • Page 21: 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 22: 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 23: 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 other below decks equipment is not required to be from a UPS (same one that supplies power to the ADE), but it is recommended.
  • Page 24 Site Survey ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 25: 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 26: 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 27: Installing The System Cables

    ST88-21 C/Ku-Band TVRO Installation Refer to the vendor supplied manuals for installation of the other below decks equipments. Prepare other locations throughout ship for any other equipment which is not co-located with the ACU. 3.3.5. Installing The System Cables Install appropriate cables from Below Decks Equipment to the ADE Location(s).
  • Page 28 Installation ST88-21 C/Ku-Band TVRO Observe the painted numbers on the radome panels that clearly identify their positions respective to each other and the base pan assembly. Loosely assemble the 5 lower side panels, using the hardware provided, to form the bottom half of the radome.
  • Page 29 ST88-21 C/Ku-Band TVRO Installation 14. Set the lower half of the radome assembly on the base pan aligning the painted numbers on the radome panels. Loosely attach the lower side panel assembly to the base frame using the hardware provided.

  • Page 30: Preparing The Ade For Lift

    Installation ST88-21 C/Ku-Band TVRO 20. Using a four point web lifting sling and lifting clips, lift the upper half of the radome up over the antenna pedestal and set it onto the lower side panels aligning the painted numbers on the radome panels.

  • Page 31: Installing The Ade

    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 32: Connecting The Below Decks Equipment

    Installation ST88-21 C/Ku-Band TVRO that is within 6 feet of the rear panel connections of the ACU. It also is one rack unit height. Install the Base Multiplexer Panel on the rear of the 19” equipment rack or other suitable location that is within 6 feet of the rear panel connections of the ACU.

  • Page 33: Other Bde Connections

    ST88-21 C/Ku-Band TVRO Installation CAUTION - Electrical Shock Potentials exist on the Gyro Compass output lines. Assure that the Gyro Compass output is turned OFF when handling and connecting wiring to the Terminal Mounting Strip. DO NOT HOTPLUG THIS CONNECTION 3.6.5.1.

  • Page 34: Final Checks

    “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 35: Power-Up The Ade

    ST88-21 C/Ku-Band TVRO Installation 3.11. Power-Up The ADE Turn Pedestal AC power breaker ON. 3.11.1. Initialization Turn the pedestal power supply ON. The PCU will initialize the stabilized portion of the mass to be level with the horizon and at a prescribed Azimuth and Elevation angles. The antenna will go through the specific sequence of steps to initialize the level cage, elevation, cross-level and azimuth to predetermined starting positions.

  • Page 36: Fine Balance And Monitoring Motor Drive Torque

    Installation ST88-21 C/Ku-Band TVRO Do NOT cycle antenna power to re-Initialize the antenna. Return to the ACU, which is still in REMOTE BALANCE mode, and press ENTER to exit Remote Balance Mode. When you exit Balance Mode the antenna will be re-initialized, which turns DishScan®, Azimuth, Elevation and Cross-Level drive ON.

  • Page 37: Setup

    ST88-21 C/Ku-Band TVRO Installation Example: The antenna pictured in the screen capture below is imbalanced so that it is “Front, or Bottom, Heavy”. The LV trace is plotting above the red line, indicating that the LV axis is being driven CW to maintain the current elevation position.
  • Page 38 Installation ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 3-14...

  • Page 39: 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 40: 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 41: 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 42 Setup – Ships Gyro Compass ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 43: 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 44: 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 45: 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 46 Determine Internal Tracking Receiver Settings ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 47: 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 48: 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 49: 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 50 Setup – Home Flag Offset ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 51: Setup - Targeting

    ST88-21 C/Ku-Band TVRO Setup – Targeting Setup – Targeting 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 52: 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 53: 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 54: 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 55: 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 56: 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 57: 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 58 Setup – Searching ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank...

  • Page 59: 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 60 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 61 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 62 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 63: 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 64: 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 65: Functional Testing

    12.1. 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 66: 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 67: Maintenance And Troubleshooting

    Power Supply. Observe proper safety precautions when working inside the Pedestal Power Supply. 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 68: 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 69: 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 70: 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 71: 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 72: 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 73 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 74: Isolating A 400 Mhz Modem Fault Procedure

    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 75 ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting Tools suggested: Laptop or PC w/ an available comport and ProgTerm Ver. 1.35 or Later diagnostic software installed DacRemP Ver. 0.20 or Later 9 pin Serial cable Straight thru (1-1 Pin out) For Serial Based...
  • Page 76 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO • Rotary Joint (Receive channel) Verify continuity on the receive channel for its entire 360 degree range of motion. Replace rotary joint if any sector of it has failed. 13.6.3.1.3. BDE/ADE No Response: The Following possibly points of failures assumes LED illumination on both modems.

  • Page 77: Troubleshooting

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting • ADE Modem Rx Port Failure (Not receiving at 452.50MHz) Install Spectrum Analyzer in line with the Rx IF coax path. If 452.5MHz Transmit Beacon is present, the fault is the BDE modem. If 452.5MHz Transmit Beacon is NOT present, the fault is with the ADE modem.

  • Page 78: Antenna Initialization (St-21 Series)

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO the signal coming from the targeted satellite. The 24VDC motor is remotely controlled by the ACU (Manual OR Auto-Polarization) through the PCU and Shielded Polang Relay Assy. Two fixed frequency C-Band LNBs and one Quad Ku-Band LNBs are installed. Both C-Band polarizations (H &...

  • Page 79: Troubleshooting Using Dacremp

    13.7.4. 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.

  • Page 80: Antenna Loop Error Monitoring

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO 13.7.5. 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.

  • Page 81: Reference Sensor Monitoring

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

  • Page 82: Open Loop Rate Sensor Monitoring

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

  • Page 83: Open Loop Motor Test

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

  • Page 84: To Disable/Enable Dishscan

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO • 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.
  • Page 85 ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting Select the “Comm Diagnostics” window under to the Tools submenu or Press “CTRL + C” 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.
  • Page 86 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 87: 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 88: 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 89: To Adjust Tilt

    ST88-21 C/Ku-Band TVRO Maintenance and Troubleshooting 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 90: To Reset/Reinitialize The Antenna

    Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO back and left to right. You should wait at least 10 seconds between commands to allow time for sensor to settle. 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...

  • Page 91: 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 92: 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 93 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 94 Maintenance and Troubleshooting ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 13-28...

  • Page 95: 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 96: 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 97: 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 98: 126" Radome Assembly

    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 99: 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 100: 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 101: Model St88-21 Drawings

    ST88-21 C/Ku-Band TVRO Model ST88-21 Drawings Model ST88-21 Drawings The drawings listed below are provided as apart of this manual for use as a diagnostic reference. Spare Parts kits listings are provided as part number reference for replaceable parts and common assemblies.
  • Page 102 Model ST88-21 Drawings ST88-21 C/Ku-Band TVRO This Page Intentionally Left Blank 15-2...
  • Page 103 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 104 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 105 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 136759-1 ANTENNA ASS'Y, ST88-21 1 EA 135631-1 FEED ASS'Y, DUAL C, QUAD KU 2 EA 134164-1 LNB, C-BAND, DRO, 8225RF 1 EA 132463-1 LNBF, QUAD, KU, INVERTO, MODIFIED 1 EA 131057-3...
  • Page 106 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 125411-2 M1 DAC-2202, DVB RCVR, 9 WIRE IF 1 EA 131856-1 BELOW DECK KIT, 4CH, TVRO, 400MHZ 1 EA 131857-1 B1 BASE MODEM RACK PANEL ASS'Y, 4CH TVRO 1 EA 116676 D ASSEMBLY, TERMINAL MOUNTING STRIP 1 EA 130854-2...
  • Page 108 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 136765-1 PEDESTAL ASS'Y, ST94/ST88 PL C3 Pedestal_Crate 1 EA 128515-2 POWER ASS'Y, 220V, 45 IN. SHROUD, TVR PL C3 I1 w/136765-1,1 Pedestal_Crate 1 EA 136763-1 ELECT.
  • Page 109 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 111 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 109731-2 REFLECTOR, 2.1M, W/CUSTOM BACKFRAME PL C2 Base&Refl_Crate 4 EA 115446-8 Q2 FEED STRUT ASS'Y, 39.00 IN PL C1 Radome_Crate 1 EA 135631-1 FEED ASS'Y, DUAL C, QUAD KU PL C1 B4 SN Feed_Assy_Box Radome_Crate 4 EA 126468-1...
  • Page 112 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 113 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 114 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 115 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 116 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 117 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 118 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 120 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 121 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 122 80 81 82 83 INTERNAL AC (SPIDER MOUNTING BASE) SIZE SCALE: DRAWING NUMBER 123723 2 OF 2 SHEET NUMBER...
  • Page 126 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 127 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...

Table of Contents