Labgear LAB32KIT/S User Manual

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troubleshooting

Labgear LAB32KIT/S User Manual Manual pdf 1 page image

Troubleshooting© Philex Electronic Ltd. 2008. v132 Element Digital Aerial with4 Room Distribution KitUSER GUIDEIntroductionCustomer Careline 08457 573479Congratulations on the purchase of your aerial and distribution kit. The kit is designed to receive and distributeboth analogue and digital terrestrial signals around your home to up to 4 TVs without loss of signal strength.This aerial has been manufactured to the standard required to get the best reception of digital terrestrial TVservices (e.g. Freeview™). If the aerial is to be used for DTT reception check before installation atwww.digitaluk.co.uk/ to confirm that your home is in a coverage area and to find where your localtransmitter is. This kit contains all the items necessary for mounting the aerial to an existing mast or formounting externally to eaves or a wall or mounting in a loft. This kit also contains digital type coax cable toensure good reception.Aerial Features• Wideband – suitable for all UK TV reception areas, covering UHF channels 21 to 68• Receives both digital and analogue TV signals• Perfect for use in the majority of locations although in very high strength signal areas anattenuator may be required, or for very weak strength signal areas an amplifier may be neededThe aerial requires some assembly - please read these instructions carefully before beginning.CAUTION: When mounting the assembled aerial, always observe safety precautions and use thecorrect equipment. Unless you are competent in the use of ladders and other access equipment,do not work outdoors at roof height. If in any doubt, refer to a qualified aerial installer.A. Fitting the dipole assembly1. The dipole clips onto the centralboom. Ensure that the cable exit hole(from the terminal box) faces the rearof the aerial and that the locating stud fitsinto the locating hole on the boom asshown in Fig. 1.B. Rotating the aerial elements1. Rotate the elements about thecentral fixing clip until they‘snap’ into an upright position asshown in Fig. 2.LAB32KIT/SAnalogue Terrestrial TVSnowy PictureA faint, grainy or snowy picture is generally caused bya weak signal. Normally the TV transmitter will be along way away. A possible improvement could be madeby reducing the aerial downlead losses, installing ahigh gain aerial and by adding a low noise mastheadamplifier or signal booster. In a small number of cases, asnowy picture can also be caused by a TV signal that istoo strong.‘Herringbone’ Pattern‘Herringboning’ is generally caused by too strong a TVsignal or by a local high power transmitter such as CB,amateur or taxi radio. Your TV sound may be affected aswell as the picture. Using an attenuator will reduce thegain of an aerial signal and improve the overall picture.Digital Terrestrial TelevisionUnlike analogue TV signals which can still be viewedunder weak signal strength conditions, with digitalterrestrial signals blocking/freezing and/or loss of digitalpicture and sound can be caused by insufficient digitalsignal and carrier to noise ratio.Similarly blocking and even a completely blank screenwith no sound can result if the input signal to the settop box is too high. The digital cliff refers to the rapidchange from the picture and sound being perfect, todisappearing altogether.For specific help with DTT reception problems,log onto *www.digitaluk.co.uk/No picture: Check all connections from aerial to TV.Poor picture: Check all connections from aerial to TV.Check aerial is properly aligned to the correcttransmitter.If the aerial has been loft mounted try mountingoutside.Make sure new digital coax cable has been usedthroughout the installation.Check the transmitter signal is not obstructed by nearbytrees or buildings.If in a very weak signal area or for long cable runs,installing a masthead amplifier will improve the signal.If in a strong signal area the signal strength may need tobe reduced by fitting an attenuator.Intermittent Picture: Make sure all RF cable toconnector joints are tight (both inner and outer)including all flyleads and surface outlet connections.To Prevent OverheatingThe recommended clearances and other precautionsgiven in the installation section of these instructionsmust be observed to prevent overheating.In addition, the amplifier should not be fixed where it islikely to become smothered by curtains or other fabrics,etc, or other thermal insulation materials in a roof spaceor similar building void. The unit should not be leftresting on a carpet.Cable InstallationDo not install cable - Closer than 50mm to mains ortelephone wiring.Under carpets in areas likely to be walked on regularly.With sharp bends at corners.Other PrecautionsApart from the aerial and cable all other parts of the kitare not waterproof and are for indoor use only.They must not be fixed where they could be exposed todripping or splashing water. Objects containing liquidsshould not be placed on or near the appliance.To prevent risk of fire, no object with a naked flameshould be placed on or near the appliances or the wiringto them.Fitted Mains PlugThe amplifier is supplied with a standard fixed plugalready fitted. In the unlikely event that you need tochange the fuse in this plug, a 3Amp fuse to BS1362carrying the ASTA or BSI approved mark must be used.General Safety PrecautionsFor further information or any queries please contactCustomer Careline: 08457 573 479(Local rate – UK only)www.labgear.comWaste electrical products should notbe disposed of with household waste.Please recycle where facilities exist.Check with your Local Authority orretailer for recycling advice.Labgearrotate elementslocating holelocating studrear of aerialelementin uprightpositioncentral boomdipoleFig. 2Fig. 1Aerial assembly and mounting

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