dmx_basics:dmx_timing
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dmx_basics:dmx_timing [2012/01/06 06:47] – Jan_K | dmx_basics:dmx_timing [2013/03/11 03:45] (current) – external edit 127.0.0.1 | ||
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DMX512 sends packages of up to 512 frames with 8 bit data to fixtures.\\ | DMX512 sends packages of up to 512 frames with 8 bit data to fixtures.\\ | ||
Normally only the used addresses are send which means if only up to address 10 are used, only 10 frames are send.\\ | Normally only the used addresses are send which means if only up to address 10 are used, only 10 frames are send.\\ | ||
- | The max number of frame that can be send is 512.\\ | + | The max number of frame that can be send is 512. (Start frame + 511)\\ |
- | The packet don’t contain | + | Start Frame or Address 0 is a sync frame that can't be addressed on the fixtures.\\ |
+ | The packet don’t contain | ||
To synchronize all receivers to the transmitter, | To synchronize all receivers to the transmitter, | ||
Each receiver will from this “MAB” point, count frames and wait for the ones addressed to them.\\ | Each receiver will from this “MAB” point, count frames and wait for the ones addressed to them.\\ | ||
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nd = not defined.\\ | nd = not defined.\\ | ||
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- | A full packet containing 512 frames (Start | + | A full packet containing 512 frames (Start |
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- | Break + MAB + (Star Code + MTBF) + 511*(Frames + MTBF) + MTBP idle\\ | + | Break + MAB + (Start Frame + MTBF) + 511*(Frames + MTBF) + MTBP idle\\ |
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The shortest full pack will then be\\ | The shortest full pack will then be\\ | ||
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- | Note:\\ | + | **Note:**\\ |
Sometimes words like DMX 1024 and DMX 128 pops up.\\ | Sometimes words like DMX 1024 and DMX 128 pops up.\\ | ||
DMX 1024 means that there are 2 universes, DMX512, running in parallel.\\ | DMX 1024 means that there are 2 universes, DMX512, running in parallel.\\ | ||
- | DMX 128 means that only up to 127 channel are send.\\ | + | DMX 128 means that only up to 128 channel are send. (Start Frame + 127)\\ |
On the fixture side this means nothing they all run DMX512 and in the DMX1024 system there will be 2 physical connection available each running DMX512.\\ | On the fixture side this means nothing they all run DMX512 and in the DMX1024 system there will be 2 physical connection available each running DMX512.\\ | ||
- | The DMX128 means that in practice only addresses up to 127 can be used.\\ | + | The DMX128 means that in practice only addresses up to 127 can be used because address 0 is the start sync and it is not a legal address on the fixture.\\ |
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dmx_basics/dmx_timing.1325832476.txt.gz · Last modified: 2013/03/11 02:57 (external edit)