Determining The Unique Dmx Start Channel; Table 2-1. Example: Determining The Dmx Start Channel - High End Systems Studio Spot 250 User Manual

used by Studio Spot 250 = 28.4 fixtures per link) or up to 32 Studio Color 250
fixtures*.
*Note: Although there are enough available DMX channels to link up to 34
Studio Color 250 fixtures, you must use a DMX splitter to connect more
than 32 fixtures per link. The 32 device limit complies with the EIA-485
standard. Connecting more than 32 devices per link without a DMX
splitter will eventually deteriorate the digital signal.
The fixture's channel range must not overlap any other device's channel range on the
link. When two devices on the same DMX link have overlapping channel ranges, one
or both devices will be disabled or behave erratically.
Note: The single exception to the non-overlapping rule is if the fixtures are
the same type (for example two Studio Spot 250 fixtures) and share the
entire channel range.

Determining the Unique DMX Start Channel

The DMX start channel is the first channel available to a fixture in its channel range.
To determine each fixture's DMX start channel in a link, you must know the number of
channels used by each fixture (see "Fixture Types" on page 2-1).
Knowing that the first fixture on the link will use DMX start channel 1, you can
determine the DMX start channel for each successive fixture by adding the number of
DMX channels used by the fixture to the fixture's DMX start channel. For example, in
Table 2-1, 18 (channels used by the Studio Spot 250) + 1 (DMX start channel for the
first fixture) = 19 (DMX start channel for the next fixture on the link).

Table 2-1. Example: Determining the DMX Start Channel

Fixture location
on the link*
First Studio Spot 250
Second Studio Spot 250
Third Studio Color 250
Other Device
Fourth
(using 14 channels)
Fifth Studio Color 250
*Note: The fixture location on the link does not have to comply with this
example. The fixtures can be addressed in any order on the link.
2-4 Configuring the Fixture
Number of DMX channels
Fixture name
18 channels
18 channels
15 channels
14 channels
15 channels
used per fixture
®
Studio Spot 250 / Studio Color
DMX start Channel
channel range used
C001 1-18
C019 19-36
C037 37-51
C052 52-65
C066 66-80
®
250 User Manual