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CHAPTER 4
DMX Programming Basics and Quick Start
24 StudioPix™ Pixelation Luminaire User Manual
Determining a DMX Start Channel
The DMX Start Channel is the first channel of a device’s channel range on a DMX link. There are
512 available channels on each DMX universe divided among all the devices in a particular
universe. A device must have a unique DMX Start Channel number in order to respond
independently to controller commands.
To determine each device’s DMX Start Channel, identify the footprint of every device on the
universe. The device’s footprint is the number of consecutive DMX channels a device requires
and is determined by the channels in the fixture’s protocol. The fixture’s DMX channel range
must not overlap any other device’s channel range on the link. When two devices on the same
DMX universe have overlapping channel ranges, one or both devices will be disabled or behave
erratically.
Select the protocol level in the fixture’s onboard menu system. The tables on the following
pages list the parameters included in each protocol mode.
Protocol
Mode
Description
DMX Channel Range
Last Valid Start
Channel
SHOWPIX StudioPix SHOWPIX StudioPix
Standard
Protocol
Full control of graphic engine with global
and two image layers
70 70 442 442
RGB Reduced
Protocol
Washlight control only with red, green,
blue, intensity, and strobe controls
12 12 501 501
Pixel Mapping
Protocol
Individual RGB control of LEDs plus
master intensity, and strobe
390 192 123 321
Extended
Protocol
Full control of graphic engine with
Individual RGB control of LEDs available
for additional media input
451 253 62 260