Installation commissioning should carefully

 

    Projector for the home environment , there will generally not very satisfactory results debugging . However, for engineering , the non-standard signal source , a signal line is too long , power factor of electromagnetic interference and other electrical devices often do not have good results , after commissioning and grind and , sometimes require some additional auxiliary equipment, to fully play its due effect.

 

    Multi- source computer engineering karaoke machines , there are already several generations of products to market , there are many brands , there are also stand-alone network version , but the hardware changes connected with the projector is not large , the early output devices graphics format that is standard computer graphics , signal , because the graphics are many kinds of output interface types, the performance difference is also great, with more trouble then , later referred to Cheung . The recent appearance of karaoke machines , panels, appliance operation has the tendency , the output interface is very similar with DVD ,? AV output S-Video VGA port readily available, as long as the projector can be related to the docking port .

 

    Standard setting issues , most decisions VOD machine output signal to PAL signal , the projector is essentially PAL / NTSC dual system , very few models for the NTSC single system , in theory, there would be no system problems However, after careful comparison, domestic projectors tend to have better results in NTSC , PAL system and some models will be out in the field amplitude widening , lose some image information , if there is such a phenomenon , with VOD machine technician negotiated its output is set to NTSC.

 

    To poor signal quality caused by local interference, colorless, no synchronization problems are common. Engineering multi- use AV output , longer cabling, without the insertion relay amplification , AV cable is best not longer than eight meters long connection will bring twill due to signal attenuation or water ripples interference , serious no color or image is not synchronized. If you use a long line of environmental requirements , can be added to the signal amplifier stage buffer amplifier after transmission . Can also be purchased commercially available products, there are 6 ~ 10dB gain ideal.

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