Frequently Asked Questions
What is Automated Cognitive Coexistence?Most wireless DMX distribution systems, including CRMX, operate on the same license free 2.4 GHz band as WiFi, ZigBee, Bluetooth, wireless intercoms, microphones, etc. Interference between such systems has been a growing problem in the industry with no available solution. LumenRadio's CRMX is the first system to continuously scan the radio spectrum and dynamically adapt its frequency hopping patterns to the surrounding environment. This eliminates interference and maximizes performance of all radio systems in the same area. CRMX is an acronym for Cognitive Radio MultipleXer. It is essentially a smart radio that solves a daunting challenge, with no need for user expertise.
What is fidelity and error correction?DMX fidelity and error correction ensures that DMX frames retain the exact same content and properties, including timing parameters, throughout the transmission process. This is important as many systems now employ moving lights, media servers and LEDs; devices that can severely misbehave if they receive DMX frames that in any way are fragmented or corrupt. In other words, in a system without fidelity DMX frames could arrive to a moving light with only 8 bits of a 16 bit parameter updated, the other 8 bits are old data, hence the 16 bit data field is corrupted which could lead to severe misbehavior of a fixture. The error correction mechanism recreates lost, or corrupted, radio packets thus helping to ensure that the signal have perfect fidelity even under bad radio conditions.
What is synchronization and latency?Synchronization guarantees that the DMX frames are delivered by all receivers at exactly the same time regardless of their location and the presence of other radio systems. This is for example critical to maintain uniformity during color changes in large area LED installations controlled by multiple receivers. Likewise the latency have huge impact on many setups. The latency is the time it takes for the signal to propagate through the system. With the low latency of only 5 milliseconds it is impossible to the human eye to detect the difference in time of a signal delivered by a cable compared to a signal delivered by a CRMX system. Some systems have long latency times, resulting in noticeable delays of the signal. Or even worse, the system might not have latency control at all, making it impossible to predict the delay of the signal.
What is a transmitter, receiver and a Flex unit?In order to wirelessly distribute DMX and RDM, a minimum of two units are required; a transmitter and a receiver.
TransmitterOne transmitter per DMX universe is required. It receives DMX/RDM data from a lighting console which is then distributed wirelessly to any number of linked receivers. If more than one DMX universe is to be distributed, simply add more transmitters.
ReceiverAt least one receiver per transmitter is required, but an unlimited number of receivers can be used. Receivers are physically connected to fixtures and outputs the DMX/RDM data it receives from the transmitter.
FlexA type of unit that is user configurable to act either as a transmitter or as a receiver. When used as a receiver, a Flex unit is also able to output Ethernet based protocols such as Art-Net or Streaming ACN. Can be switched from transmitter mode to receiver mode and vice versa at any time.
Can I transmit multiple universes?CRMX systems can handle any number of receivers connected to a transmitter; use one receiver to create a point-to-point link - for instance to create a long range RF link, or many receivers to create a point-to-multi-point link - for instance a typical truss data distribution. If more than one universe is needed, multi universe transmitters and/or multiple transmitters can be used. This is what we call multi-point-to- multi-point. The only limitation of the number of universes that can be used is the frequency spectrum usage in an area, with smart antenna configurations and cell planning, even as much as 60 universes can be used.
What is CRMX Unity?Lighting professionals are often forced to invest in parallel infrastructure for wired and wireless systems, run different networks for each equipment manufacturer and have different control interfaces for different networks - when all this should be one unified network with one user interface. To make lighting control easy, efficient and affordable LumenRadio now offers CRMX Unity; a platform for unified networking and system management that allows the user to mix wires and wireless connections in the same network.
To read more about CRMX Unity, please visit the dedicated CRMX Unity page.