The SHoW DMX OEM Receiver User’s Manual
Rev 1.1 10/14/08
22 of 27 Pages
Adjustable Output Power
Sometimes an application calls for the most available broadcast power, but most
entertainment systems do not need the full power of the SHoW DMX Transmitter. In
Fact, many Broadway shows have used CTI’s 10mW WDS Transmitters for their
wireless DMX systems.
The broadcast power of the CTI SHoW DMX Transmitter is adjustable
1
to allow the user
to calibrate the system’s broadcast power to match the requirements of the venue. This
means that for very long range applications the Transmitter can be dialed up to the
maximum level, while for places where more than one system is likely to be in used in
relatively close proximity, or where SHoW DMX is being used in the same environment
with other more vulnerable wireless systems (e. g. WiFi), a lower power setting can be
used. Adjustable output power can be coupled with SHoW DMX’s other advanced
features to provide the “greenest”, smallest radio footprint available in wireless DMX
delivery, while also offering the highest possible fidelity and the robust, reliable
performance of FHSS Technology.
Full Bandwidth Hopping
SHoW DMX offers more than one kind of user-selectable FHSS hopping mode. In full
bandwidth hopping mode, the system will continuously hop across the full 2.4Ghz
spectrum, providing the most robust and interference-immune delivery mode available.
The system supports 16 different full bandwidth hopping patterns, which can be used at
any power setting, allowing a number of separate systems to broadcast multiple DMX
Universes in the same venue or setting.
Limited Bandwidth Hopping
In the Limited Bandwidth Hopping mode, the SHoW DMX system is assigned to one of
three sub-bands of the full 2.4Ghz spectrum. Each sub-band occupies approximately
2/5s of the full band, with one sub-band positioned at the low end, one in the center, and
one at the high end of the full spectrum. The three sub-bands overlap and each avoids
some combination of WiFi channels. This will allow the SHoW DMX Transmitter to be set
to broadcast in a different area of the spectrum than other equipment being used in the
area, to minimize or eliminate interference with WiFi or other channel specific or limited
bandwidth equipment. Whenever the Transmitter broadcast power is set to 125mW or
below, the user can select Limited Bandwidth Hopping. While not as robust as full
bandwidth hopping, limited bandwidth hopping still offers much of the protection of FHSS
broadcasting while having a lower impact on other more fragile systems.
Limited Burst DMX Output
Limited Burst mode reduces the number of DMX channels and the amount of radio
energy that is broadcast by the SHoW DMX Transmitter.
If you don’t need all 512 DMX values and you need to control the radio energy in your
system as much as possible, then you can use Limited Burst to target only the DMX
channels you need, and reduce your radio footprint even further.
1
5600 FCC Transmitter = 15mW ETSI (5mW FCC) to 398mW ETSI (125mW FCC),
5601 International
Transmitter =
5mW ETSI to 100mW ETSI
