ADDER AdderLink LPV User Manual

Contents

ADDER AdderLink LPV User Manual Manual pdf 2 page image

Connecting your AdderLink LPVDDC informationDDC information is not sent from the remote unit. Instead, the local unit holds a standard setof DDC details which are suitable for most display screens. If the standard details are not suit-able, temporarily connect the local unit directly to the display screen that is to be emulated andpower on the screen. Note: The local unit must be powered via its USB connection.If the DDC information is different to that already held, the yellow indicator will flicker rapidlyfor 2 to 3 seconds while the new information is stored.If a problem occurs while attempting to harvest DDC information, the yellow indicator on thelocal unit will show a number of distinct flashes. Note the number of flashes in case you needto contact technical support, but otherwise retry the procedure.Power controlIMPORTANT: Do not connect the local unit, via the CATx cable, to anything other than theremote unit.Low voltage power for the remote unit is fed via one of the pairs within the cable. The localunit always performs a check before applying power, which is shown by flashing the yellowindicator. When power is applied, the yellow indicator will remain on.The local unit will disable the power and begin flashing its yellow indicator if:• The cable is disconnected• Line power is overloadedIf the host computer goes into standby (turns off the display screen by disabling sync pulses, asis usually the case) the local unit will disable line power and go into a low power mode after aperiod of approximately 16 seconds. It will not attempt to check the line or turn power backon. The yellow indicator will remain off until video input is restored.Local unit1 Connect the plugs to the video outputand a vacant USB port on the computer.Note: The USB connection provides onlypower for the units.2 Attach one end of the link cable to thesocket at the end of the unit.Remote unit1 Connect the video plug to the socketon the display screen.2 Attach the other end of the link cableto the socket at the end of the unit.IMPORTANT:• Use only screened (FTP) cable to connect the two units. For cable runs greaterthan 50m, low skew cable may also be required to avoid colour fringing ef-fects within the video image.• Do not connect the local unit, via CATx cable, to anything other than the remoteunit.Video and USBconnections to thehost computerVideo connectionto the displayscreenVideo sharpness adjustmentThe remote module has a video adjustment tocontrol picture sharpness on the display screen.To adjust video sharpness1 On the computer, display a suitable highcontrast image (ideally with one or more blackvertical lines on a white background (e.g. acapital 'H' at 72 points in a word processor).2 Insert a small screwdriver into the adjustmentscrew on the side of the remote module.3 Turn the screw fully clockwise - you should seea bright white shadow to the right of your highcontrast image4 Turn the screw anti-clockwise until the whiteshadow disappears and the edges of your im-age become sharp.High contrastblack character onwhite backgroundBlack or bright whiteshadow on the rightindicates the need forsharpness adjustmentNote: The default DDC data held within the unit supports a rangeof common video resolutions. However, some graphics adapterswill choose the highest declared resolution and then scale theirvideo output to suit, which can result in poor image qual-ity. If you experience poor quality video, follow theinstructions in the 'DDC information' section toharvest DDC data from your display screen.

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