Recently, wireless DMX512 adapters have become popular, especially in architectural lighting installations where cable lengths can be prohibitively long. Such networks typically employ a wireless transmitter at the controller, with strategically placed receivers near the fixtures to convert the wireless signal back to conventional DMX512 wired network signals.
Although wireless DMX512 networks can function over distances exceeding 3,000 feet (910 m) under ideal conditions, most wireless DMX512 links are limited to a maximum distance of 1,000–1,500 feet (300–460 m) to ensure reliable operation. The first commercially marketed wireless DMX512 system was based on frequency-hopping spread spectrum (FHSS) technology using commercial wireless modems. Some later venders have used WiFi/WLAN technology. Other later-generation systems still used frequency-hopping spread spectrum (FHSS) technology, but at higher bandwidth. FHSS systems tend to disturb other types of wireless communication systems such as WiFi/WLAN. This has been solved in newer wireless DMX systems by using adaptive frequency hopping and cognitive coexistence, a technique to detect and avoid surrounding wireless systems, to avoid transmitting on occupied frequencies.
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