I have been trying to set up a video sender, with the receiver unit connected to an LCD tv. The audio signal works fine but the picture strobes. The unit I have been trying is a scart plug module, (type Nikkai) from Maplins. After trying 3 different LCD tv's, I am unable to get it to work. My local Euronics store advises me that video senders will not work with LCD tv's. I emailed Audioline and their reply was that they sell many video senders and have not had this problem reported so maybe my sender is faulty. Because the unit I have, works with a standard CRT portable tv Maplin say the unit is not faulty. I have tried the receiver unit with 2 Digilogic sets and a Mikomi, both of which have the same input/output socket panels so I presume they are 'branded' for Tesco & Argos, from the same stable. Has anyone actually got a video sender to work with an LCD tv, or is this an unknown compatability problem? Your comments please would be much appreciated.
video senders
Sep 19, 2006
3 Replies
They should do. The only possible reason I can suggest for them not working is RF interference. Perhaps LCD Tv's are inherently more noisy? Try it at very short range - say six inches.
LCD TV sets do not sync lock exactly the same way as CRT sets. The CRT set uses horizontal and vertical scanning with direct phase and sync lock. The LCD set uses XY addressing that is derived from the video signal, only using the horizontal and vertical sync as a reference. Because of the way that the LCD sets process the input signal, when looking at composite video signals, the signal source has to have very accurate specifications for the sync, burst and blanking content of the video.
The problem with the low cost home type video senders is that their accuracy for their sync spedifications is not accurate enough for your LCD set. The more expenisve type industrial video modulators will work for you. But, these would not be cost effective for you. If
That is the reason why your sender will work with a CRT set, and not with an LCD set. There are some LCD TV models that are more tollerant for sync offsets or errors.
The link below is to a company that makes excellent RF products for RF modulation and transmission.
formatting link
Jerry G.
enfield455 wrote:
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