Manuals / Hughes / Home Audio / Radio Antenna

Hughes AN4-074-DF Trimast or other antenna mount, Trimast in various configurations

Models: AN4-074-DF

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Trimast (or other antenna mount)

Trimast (or other antenna mount)

The trimast is not part of the antenna kit. It is shown here because it is the most commonly used mounting option for the .74 m antenna. As shown in Figure 6, the trimast can be configured and manipulated in several ways to adapt it for mounting onto surfaces of various angles. For other suitable mounting options, see the DIRECWAY Antenna Site Preparation and Mount Installation Guide (HNS 1035678-0001).

Wall

Mast

Struts (2)

T0145002

Flat roof

Pitched roof

Figure 6: Trimast in various configurations

Optional shroud The shroud shown in Figure 4 is optional. It attaches to the feed assembly to protect the feed assembly and improve its appearance, but it is not required.

Figure 7: Optional shroud for feed assembly

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Chapter 2 • Antenna parts and required tools 1035567-0001 Revision A

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Hughes AN4-074-DF Trimast or other antenna mount, Trimast in various configurations, Optional shroud for feed assembly

Contents

Installation Manual for For Consumer Installations74 m Ku-bandAntenna Model AN4-074-DF 1035567-0001 Revision A OctoberCopyright 2004, 2005 Hughes Network Systems, LLC TrademarksImportant safety information Types of warnings used in this manualDANGER Antenna installation safety DANGERTo avoid electric shock, stay at least 20 ft from power lines DANGERObserve these precautions to avoid exposure to RF radiation, a potential safety hazard Page viii Contents Chapter Figures ChapterChapter Chapter30. Transmit and receive cable configurations ChapterChapter Tables xiiiChapter Tables 1035567-0001Revision ATables 1035567-0001Revision A About this document Scope and audience OrganizationRevision record Date of issueRevision ScopeOverview ChapterBroadband satellite system components Antenna installation overview on pageFigure 1 Installed .74 m antenna Chapter 1 Overview 1035567-0001Revision ARadio not visible in optional shroud Antenna reflector Transmitter Feed arm MastAntenna installation overview 6.Assemble and install the Az/El cap7.Install the radio on the feed arm 10.Install the antenna on the mountTasks related to antenna installation Selecting the installation siteInstalling the antenna mount Grounding Mount Installation Guide HNSAntenna parts and required tools Antenna kit componentsChapter Antenna kit components on pageThe Az/El cap is shipped in a bag containing Figure 5 Radio assembly Figure 4 Feed arm unattachedTrimast or other antenna mount Figure 6 Trimast in various configurationsFigure 7 Optional shroud for feed assembly Small hardware list DetailsQuantity Tools ToolDetails Installing the radio and antenna assemblies ChapterDetermining the pointing values on page Assembling the Az/El cap on pageDetermining the pointing values Assembling the Az/El cap 6.Repeat until all four bolts are installed Installing the Az/El cap onto the antenna Figure 12 Locating the polarization scaleElevation Figure 14 Locating the elevation reference edge Figure 15 Reading the elevation reference edgeElevation nut one on each side Elevation reference edgePolarization Bottom of reflector Installing the fine elevation pointing tool Figure 18 The fine elevation pointing tool3.Separate the end of the waveguide from the shim 4.Remove the horizontal shim and O-ring Because of the shim’s alignment pins, you must rotate the TRIA 90 from its horizontal polarization position. You must rotate the TRIA before you re-attachthe waveguide end so you can insert the shim alignment pins into the waveguide end plate. See Figures 21 and 8.Insert and tighten the four Allen screws Installing the radio assembly on the feed arm Figure 23 Securing the O-ringConnecting the feed arm to the antenna reflector Feed assembly WaveguideTransmitterTo connect the feed arm to the antenna reflector Installing the antenna assembly onto the mast Attaching the optional shroud Figure 29 Feed assembly with shroud Figure 28 Shroud screwsSide screw holes, one on each side Bottom screw Cabling and connections ChapterRouting the cables at the ODU on page Ground connection on pageRouting the cables at the ODU Receive cableTransmitter Connecting the transmit and receive cables Transmit cable4.Secure the cable with cable ties Ground connection Transmit Fconnector, female Ground screw Not usedFigure 33 Ground screw on the transmitter Page Pointing the antenna Adjusting the antenna on pageIsolating the transmit signal on page ChapterUsing the installation software Peaking the signalAntenna pointing overview Cable connector Display Figure 34 OPI optional toolPointing Interface Operating Instructions HNS Prerequisites for antenna pointing Adjusting the antenna AzimuthElevation PolarizationPointing adjustments on Az/El capFigure 38 Pointing features on the Az/el cap Figure 39 Antenna adjustment locations3/4-in.to the left of mark 1 and label it Receive pointing not yet moved to mark 3 on the mast, return to step 1 in Adjusting azimuth and adjust it again. Keep moving the reflector a little at a time until you get a signal Elevation Fine-tunethe antenna elevation as follows2.While watching the signal strength display, adjust the elevation adjustment nuts by turning them a few turns clockwise and counterclockwise until you peak the signal again c.Fully tighten the left nut torque to 12 ft-lbf PolarizationIsolating the transmit signal 1.Loosen the two elevation nuts Final steps Removing the fine elevation pointing toolAcronyms and abbreviations Page Index Tasks related to antenna installation 4 Tool list Transmit cable connecting 33 routingIndex 1035567-0001Revision A