henny Posted November 16, 2010 Share Posted November 16, 2010 I'm trying to get the best out of a wireless DMX link , it's 2.4ghz Its a single point to point link aprox 300m line of sight , I have some +10db omi antennas , and one +40db 40* directional antenna What will give the best result ? Tx - directional & Rx omi Or Tx omi & Rx directional ? Cheers Link to comment Share on other sites More sharing options...
Dmills Posted November 16, 2010 Share Posted November 16, 2010 Depends a bit on what else is around in the band, but I would probably start with the yagi on the Rx (The reason is that the directionality will help to reduce interference picked up from out of the acceptance angle, and this can be just as important as getting more signal in line). On paper it makes little difference, but in practise a strong local signal can desense the rx input. Further a 10dB Tx antenna gain is much close to being legal then 40dB at the tx would be. Do make sure you test in the rain, and 2.4Ghz really hates trees during the summer. Regards, Dan. Link to comment Share on other sites More sharing options...
Paul TC Posted November 17, 2010 Share Posted November 17, 2010 Note : The DMX "receiver" will also be a rf transmitter as well as it is a two way link over the radio path. Link to comment Share on other sites More sharing options...
dbuckley Posted November 18, 2010 Share Posted November 18, 2010 Puttting a gainful antenna on the transmitter may run you foul of the rules. Link to comment Share on other sites More sharing options...
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