High End Systems DL.2 - Manual (Page 60)

CHAPTER 4
DMX Programming Basics and Quick Start
38 DL.2 Digital Light 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.
Axon media servers and DL.2 fixtures both
provide individual and composite graphical control
for up to three 3-D Objects. You can control the
“footprint” of the fixture on a DMX link by
choosing to implement only the number of 3-D
objects your application requires. Select the
protocol level in the fixture’s onboard menu
system for DL.2 fixtures or through the
Protocol
Selection
DMX Channel Range
Axon DL.2
Standard Protocol 149 170
Dual Protocol 111 132
Single Protocol 73 94
CMA for
either DL.2 fixtures or Axon media servers (see Viewing Fixture Configuration Values on page
205).
The tables that follow list the parameters included in each level of protocol for both the DL.2
fixture and the Axon media server.