Custom Wireless Industrial Remote Controls by BWI Eagle Inc.

Why should you choose BWI Eagle's "Spread Spectrum" technology?

The short answer...

BWI's spread spectrum technology allows the use of multiple transmitters operating at the same time with NO blocking of each other's transmission. Conversely, a single transmitter can also send a broadcast signal out to multiple receivers, and they'll ALL receive the transmission. It also is unaffected by other RF equipment such as CB radios, wireless LAN systems, alarm systems, children's toys, and other radio frequency devices. It is extremely reliable, secure and private!

The long answer...

Remote controls that use simple FM radio frequency must continuously transmit a carrier and modulate that carrier with the unique data that needs to be decoded by the receiver. This type of technology does not allow for multiple transmissions at the same time because the data becomes corrupted. Therefore, it is impossible to have two transmitters transmitting at the same time because neither transmission would be correctly decoded at the receiver.

Spread spectrum modulation techniques enable a signal to be transmitted across a frequency band that is much wider than the minimum bandwidth required by the information signal. The transmitter "spreads" the energy, originally concentrated in narrowband, across a number of frequency band channels on a wider electromagnetic spectrum. Benefits include improved privacy, decreased narrowband interference, and increased signal capacity. The transmission frequencies are determined by a spreading, or hopping, code. The receiver must be set to the same hopping code and must listen to the incoming signal at the right time and correct frequency in order to properly receive the signal.

Our 900MHz (902 – 928MHz) and 2.4GHz (2.4000 – 2.4835GHz) spread spectrum remote controls have a wide bandwidth that allows for multiple devices to share the same frequency band without interference. The band is broken up into frequencies and no spread spectrum device stays on a given frequency for longer than a few milliseconds. Each RF manufacturer has the capability of programming in a unique “seed” that instruct its transmitter and receivers, and only its transmitters and receivers, to follow a unique frequency hopping pattern that will not be duplicated by any other devices in the area. Even if two different transmitters happen upon the exact same frequency at the same time, a disruption in communication is avoided because the data is transmitted simultaneously on multiple frequencies thus allowing the message to always get through.

Our RF products have been programmed with either 7 or 8 user selectable channels (or hopping patterns) that prevent even our own systems from interfering with one another. In addition to this enhanced communication protocol, we have the ability to assign a unique vendor ID (VID) to any of our customers which would not be replicated to any other customer. This provides additional security, due to the unique VID being embedded into the data packet being transmitted. This ensures that even our own products, on the same network pattern, will not interfere with each others transmissions. Our RF signals do not occur continuously as you would find on a typical wireless LAN communications system. Our short bursts of data can actually be transmitted in between other communication packets that may be transmitting in the area. With our unique collision avoidance protocol, we are able to have multiple transmitters communicating with the same receiver at the same time. All transmitted information will be decoded by the receiver and will not cause cancellations of the information as in other RF protocols.

We feel our wireless systems utilize some of the most advanced technology available today and provide the utmost in security and reliability in even the noisiest of RF environments. We have been utilizing this technology in our Air-Eagle systems for years. Our controls have been implemented in many installations, having multiple RF protocols in the same frequency band, with total success. All this boils down to fact that you can be confident that when the operator presses a button on our transmitter, the signal is sent to the intended receiver, all the time, every time!