
General Information
GINA User’s Manual
1-2
© 2001 GRE America, Inc. All rights reserved. This material is the property of GRE America, Inc. Copying or reproducing this material
is strictly prohibited. All violators shall be prosecuted to the fullest extent of the law.
3/01 (rev. 3)
System Requirements
For all GINA models, the only system requirement is an EIA232
(RS-232) peripheral or a personal computer (PC). When using a PC, any
communications software package such as BitCom
©
, Procomm
©
,
Crosstalk
©
,
or Windows 95/98
©
Hyper Terminal mode.
GINA
is a highly secure spread spectrum radio.
Figure 1-1. The GINA Transceiver
Spread Spectrum Technology
GINA uses spread spectrum technology, a technique originally developed
by the U.S. military during World War II, to prevent the jamming of com-
munications signals. Spread spectrum technology uses a narrow band-
width radio frequency and spreads it over a wider portion of the
bandwidth. Since the signal is spread out over the band, it renders narrow
band jammers virtually ineffective. Additionally, the spread spectrum
band can be used with low probability of interception, which is an ideal
method of communication since it is ‘radio silent’ to a conventional
receiver.
Advantages of Spread Spectrum Technology
Spread spectrum technology has many advantages. Among them are:
•
System flexibility
. Additions can be made easily.
•
Interference immunity
. Spread spectrum radios are immune
to noise.