Multi Task Device Channels - Definition

We have a lamp that uses 4 DMX addresses (it has 4 channels if I dare use that term!), 3 are straight forward Red, Green and Blue intensities based on a  0-256 (0-100%) DMX value coming down the pipe. One though, is 'broken up', sub divided (whatever) whereby different ranges of the 0-256  control different features. e.g. 0-128 is a master dimmer. 129-160 various strobe options. And the 160-256 area is used to control yet other functions/features. So we need to take each of these (what I call sub ranges) out to be controlled independently. What would be the ETC term for such a 'sub range' multi layer channel?

And another; We have a moving head that uses 256 x 256 (two DMX channels) to provide very smooth Pan and Tilt. How do we refer to two (or perhaps more) DMX 'channels that control a single device feature? Is it correct (acceptable) to interchange 'feature' and 'parameter'?

Of course we nowadays often meet fixtures (I.E a device controlled by multiple addresses) that have both multi function per a single DMC address and multi DMX addresses for a single (P/T perhaps) feature.  

Parents
  • As you say you should not use the word channels to refer to dmx addresses,   the lamp is a channel.

    Normally you dont need to think about any of this as you just patch the fixture using the profile in the library for the specific fixture.  If its there then use it.

    If you are really wanting to create your own profile for the lamp, you may need quite a bit of hand holding.  

    To get started just see if you can setup the RGB and make the other one the intensity to just see that you can get control of the lamp.  Obviously if you put the intensity above 50% its going to something strange,  If that is working and you really want to continue to build your own profile for the lamp then come back and we will try to guide you through the next stage.

    On the moving head the pair of addresses used for the fine pan are simply set as a 16bit rather than 8 bit attribute in the patch.  Again unless you are building your own profile you don't need to worry.

    If you want to see how these things are done edit the profile for the MAC250 you were playing with earlier, that's likely to have a good selection of challenging bits in its profile

  • Oh right, no I don't want to make my own profiles (not for a long time). But "Not having to worry about  . . . ." is tough for me. I like to know what's happening inside the box! Have MAC 250 Entour in EOS and linked to Capture now and just wiggling it around.

  • Well if you want to figure out what is going on then in patch click Show at the bottom left to see the fixtures in the show and click edit and then hightlight the MAC250 and on the right you get what the profile looks like.

    You'll see something like the screen shot below, you can see 16bit pan and tilt and if you cloik on the dot in ranges you will see how parameters that have ranges can be set.

Reply Children
Related