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2-16 Configuring the Fixture Technobeam
®
User Manual
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
Technobeams set to iris protocol) 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 DMX channels used by each fixture (see
“Fixture Types” on page 2-13).
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 2-2, 18 (channels used by the
Technobeam set to iris protocol) + 1 (DMX start channel for the first
fixture) = 19 (DMX start channel for the next fixture on the link).
*
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.
To assign a unique DMX start channel for the fixture:
1. Press and hold the <Menu> button until “ADDR” appears on the LED
display.
Table 2-2. Example: Determining the DMX Start Channel
Fixture
location on
the link*
Fixture name
Number of DMX
channels used
per fixture
DMX start
channel
Channel
range used
First
Technobeam
(iris protocol)
18 channels C001 1-18
Second
Technobeam
(full protocol)
18 channels C019 19-36
Third
Technobeam
(reduced protocol)
14 channels C037 37-50
Fourth
Other Device
(using 12 channels)
12 channels C051 51-62
Fifth
Technobeam
(iris protocol)
18 channels C063 63-80