High End Systems SHOWGUN - Manual (Page 26)

CHAPTER 2
Setup and Configuration
14 SHOWGUN ® User Manual
SHOWGUN fixture requires a block of 30 consecutive channels on a 512-Channel DMX link. The
Start channel is the first number of a fixture’s channel range.
The notes in the following table show the various considerations in determining valid Start
Channels for fixtures on a 512 DMX link. A single 512-Channel DMX link can accommodate up to
sixteen 30-channel SHOWGUN fixtures.
Fixture
location
on the
link
Fixture
type
DMX
channels
used per
fixture
DMX
Start
channel
Channel
range
used
Notes
First SHOWGUN 30 channels C001 1-30 The Start channel is the number of the
first channel in a consecutive block of
channels assigned to a fixture.
Third SHOWGUN 30 channels C031 31-60 Fixture can be assigned the second
block of DMX channels without physi-
cally being the second fixture on the
link.
Second SHOWGUN 30 channels C069 69-98 To avoid overlapping channels, place
the start channel at the beginning of a
range of available channels large
enough to accommodate that fixture
type
Fourth Studio Spot 18 channels C121 121-138 Every channel in the link does not need
to be assigned.
When setting the Start channel on a fixture, remember:
• A fixture’s physical location on the link does not have to coincide with the order of channel
range assignments in the link. See Row 2 in the above table.
• 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. The single exception would be if two or more
fixtures need to respond to controller commands in exactly the same way. In that case, those
fixtures must be the same type (for example two SHOWGUN fixtures) and must share the
entire channel range.