Sea Tel ST94-21 Installation And Operation Manual
  1. Manuals
  2. Brands
  3. Sea Tel Manuals
  4. Antenna
  5. ST94-21
  6. Installation and operation manual

Sea Tel ST94-21 Installation And Operation Manual

Dual c/quad ku-band tvro antenna
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
This technical data is subject to US Government export control in accordance with
the Export Administration Regulations. Export of this data to any foreign country
or disclosure of this data to a Non-US person may be a violation of Federal law.
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
July 1, 2015
INSTALLATION AND OPERATION MANUAL
ST94-21 DUAL C/QUAD KU-BAND TVRO ANTENNA
EAR Controlled - ECCN EAR99
EAR Controlled - ECCN EAR99
FOR SEA TEL MODEL
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:
Document. No. 136465 Revision A1
http://www.cobham.com/seatel

Advertisement

Table of Contents
loading

Related Manuals for Sea Tel ST94-21

Summary of Contents for Sea Tel ST94-21

  • Page 1 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 July 1, 2015 Document. No. 136465 Revision A1 EAR Controlled - ECCN EAR99...
  • 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 July 1, 2015 Clerical corrections in specifications EAR Controlled - ECCN EAR99...
  • Page 4 EAR Controlled - ECCN EAR99...

  • 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 144” Radome Assembly ..........................3-23 3.9. ADE ....................................3-24 NSTALLING 3.9.1. Hoist ......................................3-24 3.9.2. Install Antenna/Radome/Baseframe ..........................3-25 3.10.
  • Page 7 Table of Contents 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. SETUP – HOME FLAG OFFSET ................................7-1 7.1.
  • Page 8 ERIES 13.9.1. To configure the PCU; ................................ 13-25 13.9.2. MODEL CONFIGURATION NUMBERS ........................13-25 13.10. A ................................. 13-26 NTENNA TOWING ROCEDURE 14. ST94-21 TECHNICAL SPECIFICATIONS ..........................14-1 14.1. 9497 A ..................................14-1 NTENNA EFLECTOR viii EAR Controlled - ECCN EAR99...
  • Page 9 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. Fiber Optic Transmitter (CFE Optional) ........................14-6 15. MODEL ST94-21 DRAWINGS ................................15-1 15.1. M ST94-21 S ..............................15-1...
  • Page 10 Table of Contents This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 11: Introduction

    ST94-21 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 12: Dual Antenna Configuration

    Introduction ST94-21 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 ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 15: Site Survey

    ST94-21 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 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: 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 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

    ST94-21 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 22 Site Survey ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 23: Installation

    ST94-21 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 ST94-21 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

    ST94-21 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 ST94-21 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

    ST94-21 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 ST94-21 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 ST94-21 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 ST94-21 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 ST94-21 C/Ku-Band TVRO Installation 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. First, attach 2 lifting straps under the cross-level beam on the pedestal. Assure that no cables, on the front or back side of the cross- level beam, are pinched by the lifting straps.

  • Page 32: Unpacking The Radome Crate

    Installation ST94-21 C/Ku-Band TVRO 12. After removing these 8 bolts the Pedestal Assembly is free to be removed from the crate. 13. Use a crane, or other suitable lifting apparatus, to lift the pedestal off of the crate and relocate it to the area where the pedestal will be sub-assembled.

  • Page 33: Assembling The Ade

    ST94-21 C/Ku-Band TVRO Installation 3.8. Assembling the ADE 3.8.1. Preparing for Assembly of the ADE Read this entire assembly procedure before beginning. Refer to the System Block diagram, General Assembly, Baseframe Assembly, Radome Assembly and Radome Installation Arrangement drawings for your system.

  • Page 34: Sub-Assemble The Bottom Panels Of The 144" Radome Assembly

    Installation ST94-21 C/Ku-Band TVRO Apply Loctite to the bolt threads and tighten all the hardware to specified torque. 10. Remove the support blocks, or jacks, and set the base frame down on the flat, even, assembly surface to align the feet.
  • Page 35 ST94-21 C/Ku-Band TVRO Installation 15. Assure good horizontal alignment of the panels. Good alignment of the bottom edge of the panels is important for good seal on the base frame and good alignment of the top provides a good seal between the lower and upper panels.
  • Page 36 Installation ST94-21 C/Ku-Band TVRO Bad flange alignment 17. 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...
  • Page 37 ST94-21 C/Ku-Band TVRO Installation 18. Clean excess caulking off of the flange area (inside and out). The empty caulking tubes can be used to clean off the excess caulk without scratching the radome finish. 19. Repeat caulking, closing and cleaning the vertical flanges until all of the lower panel seams are closed.

  • Page 38: Sub-Assemble The Upper Panels Of The 144" Radome Assembly

    Installation ST94-21 C/Ku-Band TVRO now ready to lift onto the base frame. 3.8.4. Sub-assemble the upper panels of the 144” Radome Assembly Refer to the Radome Assembly drawing for your system and the procedure below. It is best to have at least TWO people sub-assembling the radome, one working from the inside and the other outside.
  • Page 39 ST94-21 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 ST94-21 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 ST94-21 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 ST94-21 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

    ST94-21 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 ST94-21 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 144" Radome Assembly

    ST94-21 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: Installing The Ade

    Installation ST94-21 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. Use wedges to lift the upper panels off of the lower panels about ½...

  • Page 47: 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 48: Connecting The Ade Ac Power Cable

    Installation ST94-21 C/Ku-Band TVRO 3.11.1. Connecting the ADE AC Power Cable Connect the AC Power cable that supplies power to the ADE to a suitably rated breaker or UPS. 3.11.2. Connecting the BDE AC Power Cables Connect the AC Power cables that supply power to the Below Decks Equipment (ACU, Satellite Modem, phone, fax, computer and all other equipment) to an outlet strip fed from a suitably rated breaker or UPS.

  • Page 49: Other Bde Connections

    ST94-21 C/Ku-Band TVRO Installation 3.11.5.2. SW2 - The Blockage/TX Mute Control output is driven by Blockage and RF Radiation Hazard functions. This output will short to ground whenever the antenna is within the programmed AZ LIMIT zone(s) or is Searching, Targeting or is mispointed 0.5 degrees from satellite peak.

  • Page 50: Power-Up

    “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 51: Home Flag Position

    ST94-21 C/Ku-Band TVRO Installation If any of these steps fail, or the ACU reports model "xx97", re-configure the PCU as described in the Setup section of this manual. If initialization still fails, this indicates a drive or sensor problem, refer to the Troubleshooting section.
  • Page 52 Installation ST94-21 C/Ku-Band TVRO • This chart displays the Torque Command errors for each axis via three traces, CL (Cross Level), LV (Elevation), and AZ (Azimuth), at a fixed 0.195 amps/vertical division. • In all axes, tracing centered on the reference line means that that axis drive is neutral. Tracing above the reference line means that that axis is being driven CCW.

  • Page 53: Setup

    ST94-21 C/Ku-Band TVRO Installation • The Azimuth display plots below the red line as the antenna is driven CW and plots above the red line as the antenna is driving CCW. 3.17. Setup Refer to the Setup information in the next section of this manual and in the Setup section of your ACU Manual.
  • Page 54 Installation ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank 3-32 EAR Controlled - ECCN EAR99...

  • Page 55: Basic Setup Of The Acu

    ST94-21 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 56: Acu Factory Default Parameter Settings - Stxxx-21 Series Antennas

    Basic Setup of the ACU ST94-21 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 57: Setup - Ships Gyro Compass

    ST94-21 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 58 Setup – Ships Gyro Compass ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 59: Determine Internal Tracking Receiver Settings

    ST94-21 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 60: 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 61: Nid

    ST94-21 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 62 Determine Internal Tracking Receiver Settings ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 63: Setup - Home Flag Offset

    ST94-21 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 64: You Observe "Home" Pointing Is Left Of The Bow-Line

    Setup – Home Flag Offset ST94-21 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 65: To Enter The Hfo Value In The Dac_2202

    ST94-21 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 66 Setup – Home Flag Offset ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 67: Setup - Targeting

    ST94-21 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 68: El Trim

    Setup – Targeting ST94-21 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 69: Setup - Searching

    ST94-21 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 70: Inclined Orbit Search Pattern

    Setup – Searching ST94-21 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 71: No Gyro Search Pattern

    ST94-21 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 72: Changing The Search Parameters

    Setup – Searching ST94-21 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 73: Search Inc

    ST94-21 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 74 Setup – Searching ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank EAR Controlled - ECCN EAR99...

  • Page 75: 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 76 ST94-21 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 77 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 78 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 79: Setup

    ST94-21 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 80: Tx Polarity Setup

    Setup ST94-21 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 81: 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 82: 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 83: 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 84: Azimuth & Elevation Drive

    Maintenance and Troubleshooting ST94-21 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 85: 400Mhz Modem Configuration

    ST94-21 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 86: Mh Zled Indicators

    Maintenance and Troubleshooting ST94-21 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 87: Radio M&C

    ST94-21 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 88: Troubleshooting 400Mhz Modem Communication Faults

    Maintenance and Troubleshooting ST94-21 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 89 ST94-21 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 90: Isolating A 400 Mhz Modem Fault Procedure

    Maintenance and Troubleshooting ST94-21 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 91 ST94-21 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 92 Maintenance and Troubleshooting ST94-21 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 93: Troubleshooting

    ST94-21 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 94: Antenna Initialization (St-21 Series)

    Maintenance and Troubleshooting ST94-21 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 95: Troubleshooting Using Dacremp

    Maintenance section of this manual. If initialization still fails, this indicates a drive or sensor problem. 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.

  • Page 96: Antenna Loop Error Monitoring

    Maintenance and Troubleshooting ST94-21 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 97: Reference Sensor Monitoring

    ST94-21 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 98: Open Loop Rate Sensor Monitoring

    Maintenance and Troubleshooting ST94-21 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 99: Open Loop Motor Test

    ST94-21 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 100: To Disable/Enable Dishscan

    Maintenance and Troubleshooting ST94-21 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 101 ST94-21 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 102 Maintenance and Troubleshooting ST94-21 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 103: Remote Gps Lat/Lon Position

    ST94-21 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 104: 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 105: To Adjust Tilt

    ST94-21 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 106: To Reset/Reinitialize The Antenna

    Maintenance and Troubleshooting ST94-21 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 107: Pedestal Control Unit Configuration - Stxxx-21 Series

    ST94-21 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 108: 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 109 ST94-21 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 110 Maintenance and Troubleshooting ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank 13-28 EAR Controlled - ECCN EAR99...

  • Page 111: St94-21 Technical Specifications

    ST94-21 C/Ku-Band TVRO ST94-21 Technical Specifications ST94-21 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. 9497 Antenna Reflector Type Hydro Formed Aluminum Parabola Diameter (D) 2.4 Meter (94 inches)

  • Page 112: Stabilized Antenna Pedestal Assembly

    ST94-21 Technical Specifications ST94-21 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 113: Mk 2 Pedestal Control Unit (Pcu)

    ST94-21 C/Ku-Band TVRO ST94-21 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 114: 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 3-5% moisture by weight. Soaked panels will also have higher attenuation.

  • Page 115: 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 116: Gyro Compass Interface Cable (Customer Furnished)

    ST94-21 Technical Specifications ST94-21 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 117: Model St94-21 Drawings

    15.1. Model ST94-21 Specific Drawings Drawing Title 136761-1_A System, Model ST94-21 15-3 135626-2_A1 System Block Diagram – Model ST94-21 15-5 136762-1_A General Assembly – Model ST94-21 15-8 135625_A1 Antenna System Schematic – Model ST94-21 15-10 136764-1_A Antenna Assembly, 2.4M, Dual C/Quad Ku...
  • Page 118 Model ST94-21 Drawings ST94-21 C/Ku-Band TVRO This Page Intentionally Left Blank 15-2 EAR Controlled - ECCN EAR99...
  • Page 119 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 136762-1 GENERAL ASS'Y, ST94-21 1 EA 111365-17 P1 RADOME ASS'Y, 144 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 C3 B1 SN DAC&BDE_Box...
  • Page 120 Do Not Copy, Distribute or Disclose Without Prior 1:18 136761 Written Approval From Sea Tel. ST94-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 121 CABLE ASS'Y, RG-179 COAX, F TO F(RA), 1 EA 127963-60GRN 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, ST94-21 PROD FAMILY EFF. DATE DRAWING SHT 1 OF 4/11/2012 NUMBER...
  • Page 122 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, ST94-21 PROD FAMILY EFF. DATE DRAWING SHT 2 OF 4/11/2012...
  • Page 123 EAR Controlled - ECCN EAR99...
  • Page 124 ELECT. EQ. FRAME ASS'Y, STXX-21 PL C3 I1 w/136765-1,2 Pedestal_Crate 1 EA 136764-1 ANTENNA ASS'Y, ST94-21 1 EA 136766-1 BALANCE WEIGHT KIT, ST94-21 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 125 Do Not Copy, Distribute or Disclose Without Prior 1:12 136762 Written Approval From Sea Tel. ST94-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 126 EAR Controlled - ECCN EAR99...
  • Page 127 WASHER, FLAT, 3/8, S.S. ( 7/8 OD X 13 PL C2 B2 I1 w/PkgTg2/3,2 Feed_Assy_Box Base&Refl_Crate 4 EA 114583-031 NUT, HEX, 3/8-16, S.S. PL C2 B2 I1 w/PkgTg3/3,3 Feed_Assy_Box Base&Refl_Crate ANTENNA ASS'Y, ST94-21 PROD FAMILY EFF. DATE DRAWING SHT 1 OF COMMON 4/11/2012 NUMBER 136764-1...
  • Page 128 Do Not Copy, Distribute or Disclose Without Prior 1:15 136764 Written Approval From Sea Tel. RX GAIN 33.0 dB AT 2.226 GHz ST94-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 129 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 130 Sea Tel - Strictly Confidential & Proprietary. Do Not Copy, Distribute or Disclose Without Prior 135631 Written Approval From Sea Tel. 14400MK2-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 131 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 132 Do Not Copy, Distribute or Disclose Without Prior 1:10 135632 Written Approval From Sea Tel. SCALE 1 : 2 14400MK2-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...
  • Page 133 SINGLE LEVEL MFG BILL OF MATERIAL FIND QTY PART NO REV DESCRIPTION REFERENCE DESIGNATOR 1 EA 109119-17 F4 RADOME FAB ASS'Y, 144 INCH, WHITE/SID 12 EA 117762-1 SILICONE ADHESIVE, WHT RTV 122, 10.1 PL C1 B2 DC Radome_ACC_Box Radome_Crate 12 EA 117762-1 SILICONE ADHESIVE, WHT RTV 122, 10.1 NOT SHOWN 1 EA 124818-3...
  • Page 134 RAD. MIN. HORIZONTAL EDGES OF ALL PANELS, RADOME CAP, AND BASE PAN UNDER PANELS. APPLY ADHESIVE PER SEA TEL SPEC 121730 TO ALL THREADED FASTENERS AT TIME OF FINAL ASSEMBLY AND TORQUE TO SEA TEL SPEC. 122305. SEE DETAIL A BASED ON WIND VELOCITY OF 100 MPH: HORIZONTAL WIND SHEAR: 870 LBS.
  • Page 135 RADOME CAP BASE PAN FAB DETAIL A SCALE 1 : 8 DETAIL C 204X TOP RAOME PANEL SCALE 1 : 8 RADOME PANEL P/N: 131731-1 KIT, RADOME PANEL TO BASE FRAME, 75 IN 102X P/N: 131729-2 KIT, RADOME CAP, 126, 144 IN DETAIL B SCALE 1 : 8 BOTTOM RADOME PANEL...
  • Page 136 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 137 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 138 80 81 82 83 INTERNAL AC (SPIDER MOUNTING BASE) SIZE SCALE: DRAWING NUMBER 123723 EAR Controlled - ECCN EAR99 2 OF 2 SHEET NUMBER...
  • Page 139 EAR Controlled - ECCN EAR99...
  • Page 140 EAR Controlled - ECCN EAR99...
  • Page 141 EAR Controlled - ECCN EAR99...
  • Page 142 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 143 Do Not Copy, Distribute or Disclose Without Prior 1:1.5 131857 Written Approval From Sea Tel. 14400B-21 EAR Controlled - ECCN EAR99 3rd ANGLE 1 OF 1 Copyright c Sea Tel, Inc 2011 - Unpublished Work FIRST USED: SHEET NUMBER PROJECTION...

Table of Contents