RaySat Gilat SR1500 User manual

Gilat Satellite Networks |Confidential and Proprietary Information
Gilat SR1500
Antenna System Installation and Operation
Release number DCRnnnnnnn(A)
Gilat Satellite Networks April, 2015

ii |Gilat Satellite Networks |Confidential and Proprietary Information
Gilat Satellite Networks |Confidential and Proprietary Information
This document contains information proprietary to Gilat Satellite Networks Ltd. and its affiliates and may not be
reproduced in whole or in part without the express written consent of Gilat Satellite Network s Ltd. The disclosure by Gilat
Satellite Networks Ltd. of information contained herein does not constitute any license or authorization to use or disclose
the information, ideas or concepts presented. The contents of this document are subject to change wit hout prior notice.
For questions about any Gilat products, contact:
http://www.linkedin.com/company/gilat-satellite-networks
http://www.gilat.com/contact-us
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http://twitter.com/#!/GilatSatNet
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Contents
Safety .................................................................................................................. 1
Warnings.................................................................................................................................... 1
Notices ....................................................................................................................................... 2
Introduction ........................................................................................................ 3
About the Gilat SR1500 ............................................................................................................. 3
Signal Reception........................................................................................................................................................ 3
Satellite Coverage......................................................................................................................................................3
Azimuth and Elevation ...............................................................................................................................................3
Line of Sight (LOS) Interruption .................................................................................................................................4
Standing Water Interference ......................................................................................................................................4
Set Top Box (STB) Compatibility ...............................................................................................................................4
Document Objective................................................................................................................... 5
Target Audience......................................................................................................................... 5
Gilat Support Services ............................................................................................................... 5
Specifications............................................................................................................................. 5
Acronyms and Abbreviations...................................................................................................... 5
System Overview ............................................................................................... 6
Power Requirements.................................................................................................................. 7
Antenna Components ................................................................................................................ 8
System Description ...................................................................................................................12
Unpacking, Inspection, and Installation Planning ......................................... 13
Serial Numbers .........................................................................................................................13
Unpacking and Inspection.........................................................................................................14
Installation Sequence................................................................................................................14
Installing the Antenna on a Vehicle Roof ....................................................... 15
Before You Start........................................................................................................................15
Selecting the Location on the Rooftop .....................................................................................................................15
Notes About Clamp Installation.................................................................................................16
Installation on a Vehicle Roof Rack...........................................................................................19
Installation on a Bus..................................................................................................................21
Installation on a Double Decker Bus .........................................................................................25
Indoor Back-of-Bus Installation ................................................................................................................................ 25
Outdoor Trailer Installation.......................................................................................................................................26
Installation on a Train................................................................................................................27

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Installing the Indoor Equipment and Routing the Cables ............................. 29
Placing the ACU and Receiver..................................................................................................29
Installing the ACU and Receiver ...............................................................................................29
Routing Cables Into the Vehicle ................................................................................................30
Routing Cables Through the Rear Hatch of an SUV................................................................................................31
Routing Cables Through Two Panels ......................................................................................................................31
Routing Cables Through a Grommet .......................................................................................................................32
Routing through a Drilled Point of Entry...................................................................................................................32
Connecting the System ................................................................................... 33
Connecting the Cables to the Antenna......................................................................................33
Connecting the System Components........................................................................................34
SR1500 Dual Pol Connectivity .................................................................................................................................34
SR1500 Uni Pol Connectivity................................................................................................................................... 35
Polarization Configuration ........................................................................................................................................36
Connecting the System to Power ..............................................................................................37
Alternative Power Connection –Directly to Battery ................................................................................................. 39
Appendix A –Gilat Approved Roof Bars........................................................ 40
Appendix B –Antenna Mounting Hardware................................................... 41
Clamp Kit...................................................................................................................................41
Bus Mount Kit............................................................................................................................42
Appendix C - Antenna Dimensions................................................................. 43
Appendix D –Basic Cable Kit Contents......................................................... 44
Appendix E –Configuring and Operating the Antenna with ACU ................ 45
ACU Controls ............................................................................................................................46
Front View................................................................................................................................................................46
Rear View –ACU Cable Connections......................................................................................................................47
Operating the ACU....................................................................................................................48
Connecting the ACU to the System .........................................................................................................................48
Operating the Antenna with the ACU ....................................................................................................................... 48
Configuring the Antenna with the ACU......................................................................................48
Configuring the Antenna with the ACU Web Interface ..............................................................49
Accessing the ACU Web Interface........................................................................................................................... 50
Monitoring ACU Parameters ....................................................................................................................................52
Monitoring Antenna Parameters ..............................................................................................................................54
Configuring ACU and Antenna Parameters ............................................................................................................. 55
Configuring Satellite Settings...................................................................................................................................57
Configuring Network Settings...................................................................................................................................61
Antenna Log.............................................................................................................................................................66

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Maintenance............................................................................................................................................................. 67
Logging Out.............................................................................................................................................................. 69
Antenna Status Bits..................................................................................................................................................70
Configuring the ACU with the ACU LCD Display.......................................................................71
Viewing or Changing Parameters ............................................................................................................................ 71
Diagnostics LCD Parameters...................................................................................................................................72
Setup LCD Parameters ............................................................................................................................................73
Install LCD Parameters ............................................................................................................................................74
IP Config LCD Parameters....................................................................................................................................... 74
Manual Mode LCD Parameters................................................................................................................................ 77
Location LCD Parameters........................................................................................................................................77
Coordinates LCD Parameters.................................................................................................................................. 77
Appendix F –Troubleshooting........................................................................ 78
Appendix G –Specifications........................................................................... 80
Appendix H –Acronyms and Abbreviations.................................................. 82
List of Figures
Figure 1: Satellite Elevation Look Angle ................................................................................. 3
Figure 2: Obstacles Blocking Signal .......................................................................................... 4
Figure 3: SR1500 antenna ............................................................................................................ 6
Figure 4: SR1500 Antenna components ................................................................................. 8
Figure 5: SR1500 Dual Pol connectors ..................................................................................10
Figure 6: SR1500 Uni Pol connector.......................................................................................10
Figure 7: SR1500 antenna ..........................................................................................................12
Figure 8: ACU...................................................................................................................................12
Figure 9: Receiver STB.................................................................................................................12
Figure 10: Position connectors facing cable entry point to vehicle ...........................15
Figure 11: Measure from base of antenna to obstacle on the roof .............................15
Figure 12: Lower bracket parts................................................................................................16
Figure 13: Upper clamp supports preinstalled on antenna ..........................................16
Figure 14: Mounting bracket spacers ....................................................................................17
Figure 15: Lower bracket parts................................................................................................17
Figure 16: Lower bracket placed under the crossbar......................................................18
Figure 17: Placement of top cover plug.................................................................................18
Figure 18: Secure clamp with head screw............................................................................18
Figure 19: Crossbar positioning on roof rack .....................................................................19
Figure 20: Upper mounting bracket with rubber pad.....................................................19

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Figure 21: Equal distance to the center of the roof ..........................................................20
Figure 22: Metal legs installed on bus roof..........................................................................21
Figure 23: Antenna bus installation dimensions...............................................................22
Figure 24: Sanded rectangles on the bus roof ....................................................................23
Figure 25: Preparing the antenna for mounting................................................................24
Figure 26: Antenna mounted on leg .......................................................................................24
Figure 27: Upper deck plan showing indoor antenna location....................................25
Figure 28: Typical under-roof mount and roof cut-out example ................................25
Figure 29: Antenna is clamped to crossbars or legs.........................................................26
Figure 30: Line of site of antenna on a trailer top.............................................................26
Figure 31: Bus with luggage attachment ..............................................................................26
Figure 32: Antenna positioning on train rooftop rails ....................................................27
Figure 33: Crossbars mounted on damper legs on train rooftop rails......................28
Figure 34: Mounting the ACU ....................................................................................................29
Figure 35: Open hatch routing of single cable from a Uni Pol antenna.....................31
Figure 36: Routing cable between two panels or through a grommet .....................31
Figure 37: Routing cables through a grommet...................................................................32
Figure 38: Dual Pol TNC connector inputs...........................................................................33
Figure 39: Tie wrap cables to roof rack (Uni Pol and Dual Pol examples) ..............33
Figure 40: SR1500 Dual Pol Connectivity.............................................................................34
Figure 41: SR1500 Uni Pol Connectivity...............................................................................35
Figure 42: ACU to Battery lead installed with 15Amp fuse ...........................................38
Figure 43: Power supplied from the battery running through the Ignition ...........39
Figure 44: Relay diagram............................................................................................................39
Figure 45: Upper bracket parts ................................................................................................41
Figure 46: Lower bracket parts................................................................................................41
Figure 47: Antenna mounted on leg .......................................................................................42
Figure 48: SR1500 dimensions –side view.........................................................................43
Figure 49: SR1500 dimensions –bottom view...................................................................43
Figure 50: Dual Pol and Uni Pol antenna terminals..........................................................43
Figure 51: ACU front panel controls.......................................................................................46
Figure 52: ACU rear connections .............................................................................................47
Figure 53: ACU web interface –IDU Configuration Page ...............................................51
Figure 54: ACU web interface –Login....................................................................................51
Figure 55: ACU web interface –Monitor IDU Parameters .............................................52
Figure 56: ACU web interface –Monitor Antenna Parameters....................................54
Figure 57: IDU Configuration page..........................................................................................55
Figure 58: Antenna Configuration page ................................................................................56

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Figure 59: Satellite Settings .......................................................................................................57
Figure 60: Create Satellite ..........................................................................................................58
Figure 61: Satellite Parameters Edit.......................................................................................60
Figure 62: Static Network Settings .........................................................................................61
Figure 63: Dynamic Network Settings...................................................................................62
Figure 64: Static Network Parameters ..................................................................................63
Figure 65: DHCP Clients ..............................................................................................................64
Figure 66: Advanced Network Settings.................................................................................65
Figure 67: Antenna Log ...............................................................................................................66
Figure 68: ACU web interface –Maintenance.....................................................................67
List of Tables
Table 1: Power consumption of SR1500 system components ....................................... 7
Table 2: Antenna components .................................................................................................... 9
Table 3: Minimum distance needed between antenna and other objects ...............15
Table 4: Wiring connections for SR1500 Dual Pol Connectivity .................................34
Table 5: Wiring connections for SR1500 Uni Pol Connectivity....................................35
Table 6: Pin Connections for direect battery power connection.................................39
Table 7: Upper bracket parts.....................................................................................................41
Table 8: Lower bracket parts ....................................................................................................41
Table 9: AKT2000066 Bus mount kit.....................................................................................42
Table 10: Cable Kit for SR1500 antenna ...............................................................................44
Table 11: ACU front panel controls.........................................................................................46
Table 12: ACU rear panel connections...................................................................................47
Table 13: ACU web interface menus.......................................................................................49
Table 14: ACU web interface –Monitor IDU parameters...............................................52
Table 15: ACU Status messages and their interpretation...............................................53
Table 16: ACU web interface –Monitor Antenna parameters......................................54
Table 17: ACU web interface - IDU Configuration parameters ....................................55
Table 18: ACU web interface - Antenna Configuration parameters...........................56
Table 19: ACU web interface - Satellite parameters.........................................................58
Table 20: ACU web interface - Static Network Setting parameters............................61
Table 21: ACU web interface - Dynamic Network Settings ...........................................62
Table 22: ACU web interface - Dynamic Network Parameters ....................................63
Table 23: ACU web interface - DHCP Clients.......................................................................64
Table 24: ACU web interface - Advanced Network Settings .........................................65
Table 25: ACU web interface –Antenna Log parameters...............................................66

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Table 26: ACU web interface - Maintenance parameters - Pointing..........................68
Table 27: ACU web interface - Maintenance parameters –LNB configuration .....68
Table 28: ACU web interface - Maintenance parameters –Monitoring....................69
Table 29: Antenna Status Bits ...................................................................................................70
Table 30: ACU LCD - Diagnostics parameters.....................................................................72
Table 31: ACU LCD - Setup parameters.................................................................................73
Table 32: ACU LCD - Install parameters................................................................................74
Table 33: ACU LCD - IP Config static network parameters............................................74
Table 34: ACU LCD - IP Config dynamic network parameters .....................................75
Table 35: ACU LCD - IP Config advanced network parameters ...................................76
Table 36: ACU LCD –Manual Mode parameters................................................................77
Table 37: ACU LCD –Location parameters..........................................................................77
Table 38: ACU LCD –Coordinates parameters ...................................................................77
Table 39: Problems and fixes ....................................................................................................78
Table 40: Technical specifications for SR1500...................................................................80

Gilat Satellite Networks |Confidential and Proprietary Information | 1
Safety
This antenna is one-way receive-only (non-transmitting) and does
not does not emit radiation.
Warnings
DO NOT INSTALL AN ACTIVE MONITOR IN RANGE OF THE
VEHICLE’S DRIVER TO AVOID DISTRACTION WHILE IN MOTION.
This product is intended for entertainment, program selection, and
viewing for rear seat passengers in vehicles. Consult local law
concerning installation of televisions in motor vehicles. Some
countries may prohibit TVs in motor vehicles, others restrict
placement of monitors. Do NOT view from the driver’s seat!
Do not open or remove the cover of the receiver, antenna or ACU to
avoid exposure to dangerous voltage.
The SR1500 system is specifically designed for use as it comes
shipped –with the housings and unit covers intact.
Any attempt to modify or to retrofit this product or its
components will void the warranty and may be hazardous.
Consumers should not attempt repairs to any components in the
system! There are no user accessible parts. Only qualified and
authorized service personnel should repair damaged or non-
operational equipment. Repairs to any component of the antenna
should be performed only by Gilat authorized technicians. Evidence
of unauthorized repairs or tampering will void the warranty.

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To avoid fire or electrical shock by the receiver, indoor unit, or
other components, do not expose them to rain or moisture (this
does not include the weatherproof antenna). The ACU and receiver’s
ventilation openings must not be tampered with, covered or
obstructed.
Make sure that the power to antenna is ALWAYS disconnected from
the power source BEFORE connecting or removing any cables from
the ACU.
Most television, audio and video programming is protected by copyright and
other laws. Recording or rebroadcasting of paid or other public display may
violate such laws and result in civil and/or criminal penalties.
Consumer is responsible for subscribing to a satellite broadcast service and for
all subscription costs. Unauthorized decoding of broadcast signals may violate
applicable laws and result in civil and/or criminal penalties. Consumer is also
responsible for receiving an maintaining any and all product approvals
required under applicable laws and regulations.
Gilat has tried to make this manual user friendly and helpful. It is important
that only qualified technicians install the product. This manual is subject to
change without notice.
Notices
Read this manual thoroughly and carefully before attempting to install or operate the
SR1500 antenna system. Observing these instructions is critical to ensure proper
installation. Follow each detail to ensure accurate and safe installation.
Follow all warnings and cautionary instructions in this manual.
The customer’s Direct Broadcast Satellite (DBS) account must be set up BEFORE
beginning the SR1500 antenna installation.
Save the shipping box and packing materials for the antenna. If the system
needs to be returned for maintenance, while under warranty, you will be
responsible for proper packaging.
The SR1500 antenna installation hardware provided in your kit will fit almost
any design of roof rack. There are, however, some vehicles with larger crossbars
that may not be compatible with the provided mount.
Install the antenna as far away as possible from any satellite radio antennas to
prevent interference.
Always use two people to move or lift the antenna to avoid strain or injury.
Thoroughly inspect the vehicle’s roof rack to ensure it can support the antenna
weight of 32 kg. Verify that the roof rack is in good condition prior to
installation. Seek professional assistance to tighten or adjust the mounting
brackets, as required for safety and safe operation of the vehicle.
The SR1500 antenna, when properly installed, increases the vehicle height by at
least 27.5 cm over the existing roof rack or cab. This includes an at least 2.5 cm
gap between the antenna and the vehicle roof for necessary air flow, plus the
antenna’s height of 24 cm. Make sure you are aware of the new height of the
vehicle with the antenna and mount above the roof rack. Use caution when
driving under overpasses, parking garages and other low clearance areas.

Gilat Satellite Networks |Confidential and Proprietary Information | 3
Introduction
About the Gilat SR1500
The Gilat SpeedRay™ 1500 (SR1500) is the innovative antenna system that provides
live satellite TV to a vehicle, while in motion. This manual provides basic instructions
on how to install the antenna and controller in most vehicles and operate it safely.
Signal Reception
The SR1500 antenna can be used to receive satellite television via the Direct
Broadcast Satellite (DBS) satellites, located 35,000 km in space. This system requires
a clear view to the skies above the equator to maximize the signal reception. Other
factors, such as satellite coverage area, elevation angle, and weather also contribute
to the signal quality.
Figure 1: Satellite Elevation Look Angle
Satellite Coverage
You must be located within the satellite’s coverage area for proper reception. As you
begin to travel outside of this coverage area, the signal becomes weaker.
Azimuth and Elevation
The DBS satellites are located in the skies above the equator. The SR1500 is a
sophisticated mobile antenna with a satellite recognition and tracking system. The
antenna automatically determines and maintains the proper azimuth and elevation
angle without user intervention. This enables the system to receive satellite TV while
stationary or in motion.

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Line of Sight (LOS) Interruption
The SR1500 antenna needs a clear line of sight (LOS), or view to the satellite for
uninterrupted reception. Objects such as buildings, mountains, bridges, tunnels and
trees that block this view will cause a loss of signal. The signal will, however, be
quickly restored once the antenna has a clear LOS again.
Heavy rain, snow or ice may also interfere with the signal reception. Stray signals
from radio or television broadcast towers may also affect the satellite signal.
Figure 2: Obstacles Blocking Signal
Standing Water Interference
When a vehicle is parked, rain and morning dew may collect on the radome of the
antenna. This may cause interference with satellite reception. Once the vehicle is in
motion, any standing water on the antenna should roll off and the interference
resolved. Clean the radome with a soft, clean cloth if necessary. Some aftermarket
water repellents are also available to help reduce rain and dew from building up on
the antenna.
Set Top Box (STB) Compatibility
Some STBs are more sensitive than others and may cause a degradation in
performance during marginal conditions, such as heavy rain, heavy snow, and
partially blocked LOS. The STB model should be selected, and an initial setup run, in
coordination with Gilat Technical Support to assure compatibility with the particular
application.

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Document Objective
This manual provides basic instructions on how to install the antenna and controller
in most vehicles and operate it safely.
Target Audience
The Installation sections of this document are intended for trained personnel
familiar with installing automotive-type electronic equipment. The Configuration
and Operation sections are intended for field operations personnel trained to
operate the antenna.
Gilat Support Services
In order to receive support from Gilat, the installer/customer needs to register on
the Gilat Star Track customer web site at https://startrack.gilat.com/signUp. The
registration must be made using the name of the party who purchased the antenna
and other equipment. If there are any problems during the registration process,
contact your local Gilat representative for assistance.
You can use your account to obtain assistance on installation and operational issues
as well as requests for equipment repair.
Specifications
See Appendix G –Specifications for the product specifications.
Acronyms and Abbreviations
See Appendix H –Acronyms and Abbreviations.

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System Overview
The SR1500 antenna system provides live satellite TV to a vehicle, while in motion. It
is suitable for installation on any vehicle. It includes a receive panel and electronic
circuits, and is designed, built, and ruggedized for outdoor operation.
Figure 3: SR1500 antenna
The SR1500 antenna is available in two versions:
Uni Pol (one cable connection) antenna model supports a single TV screen –
one user on one channel at a time.
Dual Pol (three cable connections) antenna can service multiple TV screens,
with each passenger able to access a different channel. The Dual Pol model is
useful on buses.
Accordingly to the version selected, either one or three cables are routed from the
antenna to the indoor compartment.

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Power Requirements
The power consumption of the SR1500 antenna components is detailed below.
Typical power consumption is relevant for general sizing of the power system to
support the system.
Maximum power consumption relates to extreme situations where the antenna
DC motors need full power to rotate the platform on the azimuth and elevation
against the inertia (such as when a vehicle turns sharply or travels at an
extreme tilt). This is relevant when designing for peak system requirements.
The additional power consumption of peripheral equipment needs to be considered
when planning the overall power budget. The actual installation should be
performed by an expert in the field.
Gilat recommends using a true sine wave DC to AC power inverter,
0 AWG cables for connection in the vehicle, and a secondary battery
or UPS, including a circuit breaker to prevent damage to the
equipment or vehicle.
Table 1: Power consumption of SR1500 system components
S
Sy ys st te em m C Co om mp po on ne en nt t
P
Po ow we er r C Co on ns su um mp pt ti io on n
T
Ty yp pi ic ca al l
M
Ma ax xi im mu um m
Antenna
50 W
110 W
ACU
8 W
20 W
STB, typical
10 W
25 W
Total
Uni Pol antenna using one STB
68 W
155 W
Dual Pol antenna using three STBs
88 W
205 W
The ACU provides power to the antenna and STBs, and is typically
powered by a 10-30 VDC/110 W source. The values shown are for
individual unit consumption. Actual power consumed depends on
the applicable efficiency coefficient (up to 15%) due to indirect
powering of each unit through the ACU.

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Antenna Components
The SR1500 antenna is a self-pointing mechanically steered Ku-band phase array
antenna. The Uni Pol version provides reception (Rx) by a single antenna array panel
at dual circular or linear polarizations. The Dual Pol version provides simultaneous
V/H or RHCP/LHCP on 1.5GHz band on three simultaneous connections. In addition,
the antenna can automatically search for, locate, and track a requested
communication satellite.
The antenna includes the following key components:
Rotating platform containing:
oPhased array panel
oReceive and polarization control units
oElevation and azimuth mechanisms for panel movement
oGPS, motion sensors, and main CPU unit with a built-in RSSI tuner
Dual-channel rotary joint
Radio frequency transparent weather proof radome
Connector interface box
Static platform holding all antenna components
The major components of the antenna are shown in the figure below:
Figure 4: SR1500 Antenna components

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Table 2: Antenna components
C
Co om mp po on ne en nt t
D
De es sc cr ri ip pt ti io on n
1
Azimuth Motor
Control
Control unit for the azimuth motor.
2
Azimuth Motor
A belt-driven motion mechanism that turns the rotating
platform in azimuth based on RSSI power levels and gyro
block readings.
3
Two-Axis Gyro
The gyro block and inclinometer control part of the antenna
acquisition and tracking process. They ensure tracking under
normal conditions and maintain the orientation of the
antenna toward the satellite for some period during
blockages, when the satellite signal is not available.
4
Panel
The panel consists of a multi-layer structure of two-port
radiating elements and a complex low loss feeder system. It
operates with two orthogonal polarizations, which are later
used for precise linear polarization control.
5
Rotating Platform
Contains all antenna parts and it is attached to the static
platform by a central bearing and peripheral damping rollers.
6
Static Platform
Base of the entire antenna that holds the rotating platform, a
top cover radome, a connector box and four mounting
dampers.
7
LNB and Rx Pol
Control
Standard PLL-based device that down-converts different
receive signal frequencies to IF band.
8
Elevation Motor
Positions the panel to the proper elevation angle using a
stepper motor and a belt-driven pulley. An elevation home
sensor is used to define the initial position of the panel.

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C
Co om mp po on ne en nt t
D
De es sc cr ri ip pt ti io on n
9
Connectors
Coaxial TNC bulkhead jack connectors, as follows:
SR1500 Dual Pol - Three TNC connectors
- Ctrl - 30V DC and Rx
- Low band –Low band Rx
- High band –High band Rx
The Ctrl connector is configurable to H or V polarization
and Low or High band.
The Low band and High band Rx are automatically set to
the opposite of the Ctrl polarization. For details, see
Polarization Configuration, on page 36.
Figure 5: SR1500 Dual Pol connectors
OR
SR1500 Uni Pol –Ctrl TNC connector for 30V DC and Rx
Figure 6: SR1500 Uni Pol connector
10
Rotary Joint
Provides independent Ku and L-band RF channels, DC, and
digital control connectivity between the rotating and static
platforms.

Gilat Satellite Networks |Confidential and Proprietary Information | 11
C
Co om mp po on ne en nt t
D
De es sc cr ri ip pt ti io on n
11
Static Dual BDC
Box
(Dual Pol version antenna only)
Fully electronic proprietary device based on RaySat's MMIC
technology, which assists the Pol configuration of additional
set top boxes (STBs). After the first STB is configured as
Vertical or Horizontal polarization setting with the ACU, the
remaining STBs are automatically set with an opposite-pol
configuration.
12
GPS
Gives the geographical location of the antenna. The elevation
look angle is based on its readings.
13
RSSI Tuner
A satellite DVB tuner with RSSI power level detector for
satellite recognition, used to maintain the panel pointing to
the satellite in elevation and azimuth.
14
CPU
Automatically controls the antenna terminal.
Radome
(Not shown) Top antenna cover made of radio signal
transparent plastics, ensuring sufficient weather and
mechanical protection of the antenna panel and all
components on the rotating platform. It is attached to the
static platform and provides additional rigidness to the entire
antenna construction.

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System Description
The SR1500 antenna system includes the following components.
SR1500 Antenna, sometimes referred to as the Outdoor unit (ODU)
(The antenna comes in Uni Pol or Dual Pol versions. The Dual Pol version is
illustrated.)
Figure 7: SR1500 antenna
Antenna Control Unit (ACU)
The ACU, sometimes referred to as Indoor Unit or IDU, supplies power and
commands to the antenna. This device allows for selection of the satellite from
which you wish to receive a signal. It is located with the satellite receiver inside
the vehicle.
Figure 8: ACU
Direct-Broadcast Satellite (DBS) Receiver, or Set Top Box (STB)
The STB picks up the satellite signals from the antenna and decodes them into
video and audio Installation and operation. The Dual Pol antenna
accommodates up to three STBs.
Figure 9: Receiver STB
External power supply
The power solution design must be examined on a case-by-case basis, taking
into consideration the vehicle and battery type. Gilat Technical Support can
provide assistance if needed.