GAMA Electronics, Inc.

R.F. Remote Control Systems

GAMA R.F. transmitters and receivers are designed to provide wireless remote control for a variety of applications. Operating in the UHF frequency band, these low power transmitter/receivers are typically used for remote control of AC & DC motors, hoist/lift controls and lighting devices. The FCC requires all R.F. wireless devices to be tested and certified to their stringent standards. Our transmitters have been FCC certified and no user license is required for operation. Most applications for our devices are custom in nature due to unique requirements requested by individual customers. We have, however, designed the basic products so they can be modified quickly and inexpensively to provide a variety of custom options. A number of standard transmitter/receivers incorporating the most popular features are available from stock. Features

FCC Certified: No user license required
Typical transmission range 100-500 feet
Secure Encoding
Addressable
AC/DC Designs
High Current Motor Controls
Custom and standard designs available

Range Issues
The FCC regulates the power of all R.F. transmitters. Our transmitters fall into the category of "Low Power Transmitters". This category is limited in range so no user license is required for operation.
While we have tested our transmitters and received signals at a distance of 1/4 mile, range can vary widely depending on the specific application. In actual operation, the transmitter sends a data stream to the receiver when a button is depressed. The receiver must receive the same data to respond to the command. If erroneous data is received, the receiver ignores the command. Thus, the shorter and simpler the data stream is, the more likely the data will be received correctly. The data stream becomes longer and more complicated as the number of functions increases or if multiple receivers must operate in the same area.
R.F. noise and interference will also effect range. The greater the distance between the receiver and transmitter, the weaker the signal becomes and the greater the likelihood that noise or interference will prevent a valid signal from being received.
Another factor that will affect range is the location of the receiver. For example, if the receiver is located inside a closed steel building and the transmitter is outside, the R.F. signal will not transmit as far as it would in open air.
The type of control required also is a factor in range. A typical garage door opener uses a single pulse to activate the receiver. Limit switches then determine direction and duration of travel. This type of control is called intermittent duty. A continuous duty signal is one where a switch on the transmitter must be pressed continuously during the entire duration of an operation. It is much easier to transmit a single intermittent pulse to a receiver and thus the range will be much greater for this type of transmission.
Typical transmission range will be in the area of 100 feet for a keyfob transmitter & 300-400 feet for a full size transmitter.
P.O. Box 1488
Crystal Lake, Illinois 60039
815.356.9600
Fax 815.356.9603
gama@gamainc.com