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SurfBeam® 2 Pro Portable Terminal Operations Guide

Page 4-7

1172964, Rev. 002

ViaSat Proprietary Information

4.2.2.4

TRIA Page (TRIA Status)

The

TRIA

page (Figure 4-6) provides general information on the status of the TRIA.

Figure 4-6: Modem Web Interface – TRIA Page

General

Tx IF Power (dBm)

: Displays the IF power for the TRIA.

Tx RF Power (dBm)

: Displays the RF power for the TRIA.

Temperature (°C)

: Displays the ATRIA’s operation temperature.

Diagnostics

Brownout

and

Blueout Mode Enabled

: Displays “Yes” or “No” depending on system configuration.

TRIA Serial Number

: Displays the TRIA’s serial number.

TRIA Firmware Version

: Displays the TRIA’s firmware version.

Module Status

Bullfrog VG

Watchdog Timer

Tx/Rx PLL

, M

icroprocessor

Cable Resistance

and Temperature

: Displays or

depending on if the system has detected an issue.

Summary of Contents for SurfBeam 2

Page 1: ...v 002 Prepared by ViaSat Inc 6155 El Camino Real Carlsbad CA 92009 1699 Tel 760 476 2200 Fax 760 929 3941 www viasat com This technical data is subject to the United States Export Administration Regulations Diversion contrary to U S law is prohibited ViaSat proprietary information ...

Page 2: ...owners ViaSat and the ViaSat logo are registered trademarks of ViaSat Inc in the U S and or other countries All other trademarks and registered trademarks are the property of their respective owners Copyright Copyright 2014 ViaSat Inc All rights reserved Warranty ViaSat Inc does not provide a warranty to the end user for this product Any such warranty from ViaSat including the implied warranty of ...

Page 3: ...ys presented from clicking tabs on a main screen Screens All other displays presented from clicking on continuation buttons Pop ups Displays presented automatically based on some action the user has taken such as confirmation questions information confirmations or error messages Tool tips Descriptive messages displayed by placing the cursor on an editable field SAFETY AND OPERATION PRECAUTIONS The...

Page 4: ...atic Discharge I IF Intermediate Frequency IFL Inter Facility Link IP Internet Protocol L LAT Latitude LAN Local Area Network LCD Liquid Cristal Display LED Light Emitting Diodes LON Longitude LRU Line Replaceable Unit M MAC Media Access Control MPE Maximum Permissible Exposure N NOC Network Operations Center O ODU Outdoor Unit P PLL Phase Locked Loop R RF Radio Frequency RMA Return Material Autho...

Page 5: ...m Assembly LCD 4 1 4 2 Modem Web Interface 4 2 4 2 1 Accessing 4 2 4 2 2 Navigation and Information 4 2 4 3 Router Web Interface 4 8 4 3 1 Accessing 4 8 4 3 2 Navigation and Information 4 8 4 4 Firmware Update 4 17 4 5 Network Connectivity 4 18 5 Terminal Maintenance 5 1 5 1 Check Out Check In Maintenance and Inspection 5 1 5 2 Fielded Daily Maintenance and Inspection 5 3 5 3 Fielded Monthly Maint...

Page 6: ...nu Navigation Tree 4 1 Figure 4 3 Modem Web Interface 4 2 Figure 4 4 Modem Web Interface Home Page 4 4 Figure 4 5 Modem Web Interface Modem Page 4 5 Figure 4 6 Modem Web Interface TRIA Page 4 7 Figure 4 7 Router Web Interface Login Window 4 8 Figure 4 8 Router Web Interface 4 8 Figure 4 9 Router Web Interface System Status Page 4 9 Figure 4 10 Router Web Interface Router Status Page 4 10 Figure 4 ...

Page 7: ...cations e g Skype Google Yahoo etc The SB2 Pro Portable Terminal is a true Go Anywhere device designed to meet the exacting needs of first responders newsgathering and other professional applications With its compact size easy setup ruggedized hardware built to MIL STD 810 specifications and support of both AC and DC power the unit can be deployed in any location The Pro Portable Terminal s design...

Page 8: ... the Tripods legs and level a user can adapt the unit to slopes of varying degrees Securing the Unit The unit require the use of ballast i e a 10 lbs sandbag per Tripod leg to secure it to the ground in case of high winds In the event the 10 lbs ballast is insufficient to maintain stability discontinue use and secure the system by either disassembling and repacking the system or moving the assembl...

Page 9: ...amage is found In the event questionable damage major or otherwise is identified contact ViaSat Inc for support 2 3 1 2 Handling and Precautions CAUTION Proper ESD precautions shall be maintained when handling equipment CAUTION Care must be taken when handling the antenna to prevent damage to the unprotected Transmit Receive Integrated Assembly TRIA modem semi rigid cables and wire bundle CAUTION ...

Page 10: ...on per the instructions provided in this manual NEVER move or carry the antenna by any part of the rotating antenna reflector TRIA or modem Observe restrictions shown in Figure 2 1 for proper handling and moving of the antenna Figure 2 1 Antenna Transporting Restrictions Modem Assembly Restrictions Proper handling of the modem assembly is extremely important to prevent damage to it and its electri...

Page 11: ...ripod The Tripod has three adjustable legs with pivot feet that connected to center pole to which the Azimuth Elevation Assembly head connects Azimuth Az Elevation El Assembly The head has four adjustment levers to point and lock the assembly head once the fully assemble unit has been pointed This component mounts atop the tripods center pole and provides a platform base for the installation of th...

Page 12: ...tent power output at 24V 9 2A 221W max Accessory Bag GPS The GPS is a magnetic computer mouse shaped device attached to a RG 174 15 cable Coax Cable The Coax cable is a 3 RG 6 F Type m to F Type m 75 Ohms copper core cable that connects the modem and TRIA The cable is rated for use at frequencies up to 3ghz a DC resistance less than 4 5 Ohms a Tx IF loss of less than 15dB for 1800 to 2300MHz and a...

Page 13: ... Image 1 Perform a site survey to locate your unit s deployment location 2 Open the transit case on a flat surface to see the top layer of the case s components Tripod Azimuth Elevation Assembly Center Reflector 3 Remove the Tripod from the pocket on the right side of the case and loosen all knobs to arrange each leg in its out most position 4 Tighten each knob x3 to lock the Tripod s legs and pos...

Page 14: ...h Fine Adjusting knob until the two edges become parallel 8 Turn the Azimuth lever until tightened leaving the Azimuth knob loose 9 Looking at the back of the Assembly loosen the Elevation lever left highlight and knob right highlight 10 Verify that the Assembly top plate has an Elevation angle of 0 If it does not rotate the top plate to its bottom position and rotate the Elevation Fine Adjusting ...

Page 15: ...y s collar bottom and the top of the Tripod s legs 14 Tighten the Assembly Post knob 15 Loosening tightening the knobs on the Tripod s legs and using the leveling bubble on the Assembly base plate make the appropriate adjustments to get the leveling bubble to show inside the black circle NOTE It is not necessary to get the bubble to lineup exactly within the back circle Approximately 90 or more of...

Page 16: ...p between the Assembly s collar bottom and the top of the Tripod s legs 19 At the transit case fold back the layer two felt divider and remove one of the Edge Reflectors 20 Attach the Edge reflectors to each side of the Center Reflector one at a time using the attached screws hand tighten these screws only NOTE For each Edge reflector start by tightening the middle screw first and then tighten the...

Page 17: ...dhorn through the reflector hole until the base of the Feedhorn and TRIA alignment slots contact the reflector hole and Assembly top plate alignment posts 25 Place one hand on the back of the TRIA housing and another on the Assembly tower Gently push and wiggle the TRIA housing until it snaps into place 26 Hand tighten the large Collar Ring located between the TRIA housing and reflector to connect...

Page 18: ...power switch is turned OFF 31 At the transit case locate the pouch attached to the inside of the case s lid and remove the GPS with cable 3ft RG6 Coax cable and power cable NOTE Ensure that the 90 connector is firmly attached to the 3ft RG 6 Coax cable if not already installed on the TRIA hand tightened only as shown in Step 21 32 Connect the end of the GPS cable to the GPS port on the back of the...

Page 19: ...sembly Twist the cap until it stops clicking and the blue ring on the cap covers the red ring on the modem port 36 Plug the end of the power cable into a grounded AC power outlet DO NOT connect to ungrounded power sources as this will severely damage the unit 37 Place any remaining storage bags and or parts back into the transit case and close latch the lid 38 Flip the power switch located on the ...

Page 20: ...ce them back into the pouch located on the underside of the case lid 3 Hold down the Modem push pin remove it from Tripod leg and place the modem and power brick in its place on the bottom layer of the case 4 Re attach plug dust covers on the modem assembly Place the assembly and power brick in its place on the bottom layer tray of the case 5 Fold the tray s cover down to cover the equipment and u...

Page 21: ...lace it carefully in its designated location on the bottom layer of the case NOTE If the splash plate falls off the TRIA put it back on 8 With the TRIA placed on a stable surface remove the 90 Coax Connector from the Accessory Bag and connect it to the TX RX port on the TRIA NOTE Ensure that the 90 connector is firmly attached hand tightened only 9 Unscrew and detach the Edge Reflectors pulling wi...

Page 22: ...two from the hinge side and two from the opposing side 1 loop the strap through the metal ring 2 pull the strap tight and 3 lay it back over itself so that the Velcro attaches NOTE Pervious versions of the Pro Portable case did not have restraining straps If there are no straps disregard this step 13 Then loosen the Elevation knob beside the AZ EL Assembly s Fine Adjust Preset label and move the e...

Page 23: ... there is only one disregard the second portion of this step and only attach the one strap 18 Loosen Tripod knobs fold feet inward insure that its feet have the points pointing towards the inside and tighten the levers 19 Place the Tripod in the right pocket and lock down with the inner most strap and then the outer most strap NOTE Pervious versions of the Pro Portable case only had one restrainin...

Page 24: ...g the Beam Therefore to find both the right and left edges of the Beam the Installer will sweep to the left then sweep back to the right This allows the modem to learn all the frequencies available in the beam Single Short Beep The Single Short Beep tone is a confirmation that the alignment process has found the correct satellite This tone occurs just after Ring Ring tone defines the edge of the S...

Page 25: ... Menu screen use arrow keys to scroll to 1 Pointing menu item and press ENT button to access the Location screen NOTE Pressing the ENT button will select whatever option that s displayed on the middle line and identified by NOTE If the display starts showing a checkerboard pattern just press any of the four Arrow Keys to continue The checkerboard is a screen saver 3 When the Location screen opens ...

Page 26: ...A This indicates that the TRIA is in Install Mode and ready to begin vertically sweeping the antenna to locate the satellite 2 While supporting the back of the TRIA Loosen the Lock EL Angle lever left side of the AZ EL Assembly Loosen the Internal Elevation knob beside the AZ EL Assembly s Fine Adjust Preset label 3 Using the Inclinometer on the side of the TRIA manually set the reflector elevatio...

Page 27: ...to raise or lower the TRIA angle a degree at a time until the you hear the tone 6 After Identifying the horizontal range where the modem emits a Ring Ring tone rotate the Assembly back across that range until you hear a Short Beep tone and tighten the AZ Course Adjustment lever The Short Beep tone will change to either a Low Slow tone or a High Fast tone indicating the unit is ready for fine tunin...

Page 28: ...le knob just tight enough to allow the azimuth to move 2 Using the AZ Fine Adjust knob horizontally adjust the azimuth a Left until the tone changes from a Low Slow tone to NO tone b Maintaining a consistent speed start turning the adjustment knob right while counting until you hear the tone go from No Tone Low Slow High Fast Low Slow No Tone c Divide the ending count number by 2 and using the sam...

Page 29: ...port a Status as Complete even though the fine tuning process in not complete 5 Tighten the Lock EL Angle lever so the antenna has no movement up or down and verify that all other levers and knobs are tight NOTE If you lose the tone while tightening loosen them and repeat the above steps 6 Press the ENT button to begin the modem lock process The LEDs on the Modem will be flashing Rx LED will begin...

Page 30: ...ength 5 Connect the power cable to the power supply brick and twist the connector onto the Power Input port on the back of the modem assembly a Twist the cap until it stops clicking and the blue ring on the cap covers the red ring on the modem port b Plug the end of the power cable into a grounded AC power outlet DO NOT connect to ungrounded power sources as this will severely damage the unit 6 Po...

Page 31: ... right arrow button once to access the first 0 field and use the up down arrows to set the first number NOTE After entering the first number continue the same process to set the remaining fields 13 After entering all required fields press the ESC button twice NOTE Pressing the ESC button will save the change 14 On the Main Menu screen use arrow keys to scroll to 1 Pointing menu item and press ENT ...

Page 32: ...he following sections provide details regarding accessing and navigating the modem s LCD screen and web interface 4 1 Modem Assembly LCD The LCD screen on the modem assembly displays Pointing GPS Modem Status DC Output Help Setting and Volt Status information which the user navigates using the ESC ENT Left Right Arrow and Up Down Arrow buttons on the modems face plate Figure 4 1 Figure 4 1 Modem A...

Page 33: ...tting the laptop s network settings for DHCP In addition the laptop can be connected directly to the modem ETH1 through ETH4 ports 2 Launch a web browser on the Support PC 3 At the web browser s address field enter the modem s IP address i e http 192 168 100 1 and press Enter 4 2 2 Navigation and Information Once accessed the web browser will open the modem s Home page Figure 4 3 From this page th...

Page 34: ... the process is nearing completion Green Indicates the modem has established a Forward Link connection Return Link Second Icon Gray Indicates that there is no Forward Link or that the Return Link is disabled several minute may pass before the icon changes color Yellow Indicates the modem is initiating a Return Link connection several minute may pass before the icon changes color Green Indicates th...

Page 35: ...ace Home Page General Modem Displays the modem s current operating state Clicking on the MODEM label below the box displaying the modem and the state icon will navigate to the Modem page IFL Displays the IFL s current operating state Clicking on the IFL label below the box displaying the IFL connection and the state icon will navigate to the IFL page TRIA Displays the antenna s current operating s...

Page 36: ...4 5 All Rights Reserved 1172964 Rev 002 ViaSat Proprietary Information 4 2 2 3 Modem Page Modem IFL Cable Status The Modem page Figure 4 5 provides general information on the status of the modem Inter Facility Link IFL and antenna Figure 4 5 Modem Web Interface Modem Page ...

Page 37: ...Telemetry Status Displays if the modem is collecting and transmitting data Cable Resistance Ohms Displays the amount of resistance the cable is producing lower is better Cable Attenuation dB Displays the level of attenuation occurring between the modem and antenna Identification IP Address Displays the modem s IP address Software Version Displays the modem s software version Serial Number Displays...

Page 38: ...Bm Displays the IF power for the TRIA Tx RF Power dBm Displays the RF power for the TRIA Temperature C Displays the ATRIA s operation temperature Diagnostics Brownout and Blueout Mode Enabled Displays Yes or No depending on system configuration TRIA Serial Number Displays the TRIA s serial number TRIA Firmware Version Displays the TRIA s firmware version Module Status Bullfrog VG Watchdog Timer Tx...

Page 39: ...e connected directly to the modem ETH1 through ETH4 ports 2 Launch a web browser on the Support PC 3 At the web browser s address field enter the router s IP address i e http 192 168 100 1 and press Enter 4 The web browser will request a user authentication and password Figure 4 7 User Name admin Password admin Figure 4 7 Router Web Interface Login Window 4 3 2 Navigation and Information Once acce...

Page 40: ...g the system router terminal and modem This section covers the Home and Router pages as selecting the Terminal or Modem will take the user to the appropriate Modem Web Interface page 4 3 2 1 1 System Status Page The System Status page Figure 4 9 provides general information on the status of the modem router Firmware version and connection activity Figure 4 9 Router Web Interface System Status Page...

Page 41: ...s Reserved 1172964 Rev 002 ViaSat Proprietary Information 4 3 2 1 2 Router Status Page The Router Status page Figure 4 10 provides general information on the status of the router s WAN DNS LAN DHCP and the router s serial part numbers Figure 4 10 Router Web Interface Router Status Page ...

Page 42: ...useful configuration pages that a user will access 4 3 2 2 1 LAN Setup Page The LAN Setup page Figure 4 11 provides general information on the LAN configuration and the ability to configure modem s IP address and DHCP settings Figure 4 11 Router Web Interface LAN Setup Page 4 3 2 2 2 DHCP Setup Page The DHCP Setup page Figure 4 12 provides the ability to add static IP addresses and view general in...

Page 43: ... and QoS 4 3 2 3 1 Port Forwarding Page The Port Forwarding page Figure 4 13 provides general information and the ability to add configure remove ports for Port Forwarding Figure 4 13 Router Web Interface Port Forwarding Page 4 3 2 3 2 Range Forwarding Page The Range Forwarding page Figure 4 14 provides general information and the ability to add configure remove ports for Range Forwarding Figure 4...

Page 44: ...formation 4 3 2 3 3 DMZ Page The DMZ page Figure 4 15 provides the ability to configure the router and modem for operations in a Demilitarized Zone Figure 4 15 Router Web Interface DMZ Page 4 3 2 3 4 Routes Page The Routes page Figure 4 16 provides information on the current routing table Figure 4 16 Router Web Interface Routes Page ...

Page 45: ...d restore router configuration upgrading the firmware rebooting the system and ping trace route utilities 4 3 2 4 1 Password Page The Password page Figure 4 17 provides the ability to change the router s required password Figure 4 17 Router Web Interface Password Page 4 3 2 4 2 Backup Restore Page The Backup Restore page Figure 4 18 provides the ability backup load new or restore the modem s confi...

Page 46: ...e page Figure 4 19 provides information on the current firmware and the ability upgrade the modem s firmware Section 4 4 provides the details on performing a firmware upgrade Figure 4 19 Router Web Interface Firmware Upgrade Page 4 3 2 4 4 Reboot Page The Reboot page Figure 4 20 provides the ability to perform a router reboot from the web interface Figure 4 20 Router Web Interface Reboot Page ...

Page 47: ...ghts Reserved 1172964 Rev 002 ViaSat Proprietary Information 4 3 2 4 5 Utilities Page The Utilities page Figure 4 21 provides the ability to test network connectivity by Pinging specific devices or web sites and performing a Trace Route Figure 4 21 Router Web Interface Utilities Page ...

Page 48: ...e to the ENT1 port and the other end to the computer 5 Open a web browser window type 192 168 100 1 into the address bar and press Enter 6 The web browser will request a user authentication and password User Name admin Password admin NOTE User Name and Password may have been changed from the above configuration per customer service provider defined requirements refer to section 7 for additional as...

Page 49: ...stem is now updated with the new firmware The reloaded web page will display the updated Version number The modem s front panel will display the updated Version number 4 5 Network Connectivity After achieving modem lock the user will need to connect to the internet Simply try going to any known website like Yahoo com MSN com and Google com to verify that a connection has been established NOTE If n...

Page 50: ...up of dirt debris c Levers that function appropriately and have clear threads d Legs that can fully extend and be locked in place e Footpads that rotate smoothly 3 Remove and inspect the Azimuth Elevation Assembly for a Bent damaged or loose parts bolts b Excessive buildup of dirt debris c Levers and knobs that function appropriately and have clear threads d Sufficiently tightened hing nuts and bo...

Page 51: ...ons and threads 7 Remove and inspect the modem assembly for a Bent damaged or loose parts bolts b Excessive buildup of dirt debris c Clean and corrosion free cable connections and threads d Connected latch pin e Covers to the Power Input Power Output and ENET ports f Functioning ESC ENT Left Right Arrow and Up Down Arrow buttons that make a popping sound when pushed 8 Remove and inspect the conten...

Page 52: ...moisture o If sand dirt or other debris is found use a brush or vacuum to remove the foreign matter o If moisture exists allow the unit to dry Check that the antenna heat sinks are clear of debris Inspect all electrical connectors for broken loose or corroded parts and missing and or loose hardware Check all wiring and coaxial cables for cuts nicks burns or abraded insulation bare or damaged wires...

Page 53: ...ax GPS etc 3 Listen for a clicking noise coming from the TRIA after the modem assembly s power is cycled Modem does not populate latitude and longitude information 1 Ensure the GPS cable connection with the modem assembly is fully seated 2 Relocate the GPS unit to another location near the terminal 3 Cycle the modems power ON OFF switch Terminal will not Peak 1 Ensure the Elevation is correctly se...

Page 54: ...formation and relevant detail as possible to provide an accurate description of the suspected issue Minimum information required includes Modem MAC Address Antenna terminal equipment manufacturer model or description Detailed description of problem Terminal Location ViaSat s Exede Enterprise Helpdesk for support installation or field Phone Domestic 855 656 6623 International 1 720 493 7300 E mail ...

Page 55: ...clude a commercial invoice with the following statement American goods being returned for repair NOTE Before returning the unit it is important that a RMA form and number is obtained from the NOC at ViaSat 8 2 Packaging To package the unit for shipment perform the following steps 1 Ensure that there is sufficient foam packing material in the shipping container to protect the unit from any hard imp...

Page 56: ...f cable and shield 75 Ohm impedance Minimum of 100 braid over foil coverage Connector Requirements RG6 linear compression connector type No crimp connectors Fully weather sealed CAT5 Ethernet Cable The SurfBeam 2 Pro Portable Terminal will come with a 5 foot CAT5 Ethernet cable GPS Single port 15 foot GPS cable Power Requirements Connection Type 6 pin port connection with screw on feature for a se...

Page 57: ...olarization Dual Polarization Reflector Characteristics Reflector 75 cm 3 piece composite ruggedized connected using 6 integrated knob screws o Center reflector x1 o Universal edge reflectors x2 Weight 6 2 lbs Modem Assembly Characteristics Router 4 port ruggedized Ethernet router Rack mountable removable brackets Keyboard Display LCD screen 6 input keys Sun shade Input Power 21 38 DC 220 Watts On...

Page 58: ...nting and press Enter 3 Wait for Long and Lat screen to appear scroll down the list and press Enter 4 Set coarse elevation to the value listed on the LCD display and then lock the antenna dish down CAUTION When connecting to the power source the integrity of the protective earth ground must be ensured so that the equipment is connected to a socket outlet with a protective earth ground connection N...

Page 59: ...Wrt open source software made available under the GNU General Public License version 2 GPL V2 as published by the Free Software Foundation As such the software is distributed WITHOUT ANY WARRANTY and to the extent permitted by law we EXCLUDE ALL WARRANTIES including the warranties of MERCHANTABILITY and FITNESS FOR A PARTICULAR PURPOSE Copies of the GPL V2 license can be obtained online at www gnu...

Page 60: ... requires the unit to be capable of either Left Hand or Right Hand Circular Polarization To address the need for dual polarization capabilities the Pro Portable comes in two configurations 1 with one Co Pol TRIA and the ability to rotate the Feedhorn assembly or 2 with two Co Pol TRIAs Configuration 1 Requires that end user have access to a clean low humidity dust free environment to disassemble r...

Page 61: ... 002 ViaSat Proprietary Information Beam Identification and Co Pol TRIA Modification Selection Resolution The KACST program has designed the following map to identify the beam coverage areas and the polarization of those beams refer to Figure C 1 Figure C 1 KACST Pro Portable Polarization Identification Map ...

Page 62: ...Beam B In this instance choose Beam B due to the unit s location being closer to the center of the beam s footprint NOTE Always select the beam circle where the deployment location is closest to the beam s general center If the location is about equal distance away from both beam centers either Polarization configuration will work NOTE If the system cannot connect to the internet but does not prod...

Page 63: ...d Assembly section of the SurfBeam 2 Pro Portable Terminal manual released in September 2012 Process 2 Disassembling rotating and reassembling the Co Pol TRIA 1 Perform the steps outlined in the terminal manual until reaching the deviation point identified in the process described above 2 Verify the unit has one Co Pol TRIA with an unmarked Feedhorn if the unit has two refer to the Configuration 2...

Page 64: ...e Kapton tape is installed between the horn base and Ortho Mode Transducer OMT housing This tape needs to stay intact to protect the unit from humidity corrosion and debris NOTE In the event the protective Kapton tape is damaged or lost contact the KACST NOC for instructions on moving forward with the installation Figure C 4 Uninstalling Feedhorn 8 Rotate the Feedhorn 90 degrees so the markings on...

Page 65: ...s Reserved 1172964 Rev 002 ViaSat Proprietary Information 9 Install the four hex screws on the base of the Feedhorn torque screws to 35 6 kgf cm 30 0 in lbs refer to Figure C 6 Figure C 6 Reinstalling Feedhorn 10 Continue with the Unpack and Assembly instructions provided with the unit ...

Page 66: ...able Terminal manual released in September 2012 Process 2 Identifying the correct Co Pol TRIA 1 Perform the steps outlined in the terminal manual until reaching the deviation point identified in the process described above 2 Verify the unit has two Co Pol TRIAs one unmarked and one marked with a striped label located on the Feedhorn just above the Feedhorn s base and on the rear of the TRIA housin...

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