User Manual

4
Summary of Function and Use
The OS2400s are radios which have been designed to provide a wireless connection
between any two devices which could otherwise be physically cabled together.
Spread spectrum: These radios transmit using a technique known as "spread
spectrum, frequency hopping communications". Using the spread spectrum technique a
narrow band signal is spread over a broader portion of the radio frequency band.
Frequency hopping: A radio which rapidly changes its operating frequency several
times per second using following a pre -determined sequence of frequencies is described
as “frequency hopping”. The receiving and transmitting radios are programmed to follow
the same frequency hopping sequence.
The OverAir design takes advantage of these characteristics which are inherent to the
spread spectrum technique:
increased immunity to noise. Radios are designed to detect specific radio frequencies.
"Noise" is defined as an unwanted signal which h as been transmitted at the same
frequency as the radio was designed to detect. There are many man -made and natural
sources of "noise". The OS2400 operates more efficiently than a radio that operates
using conventional technology.
more users can share the same frequency at the same time. Cell phone use is
dependent upon spread spectrum transmission.
Under FCC rules, users of FCC certified spread spectrum products do not require their
own license from the FCC. The manufacturers of the products are requi red to apply for
and be granted an FCC license for the device. OverAir has been granted a license by
the FCC for the use of its OS2400 radios.