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© 2000 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)
General Information
GINA User’s Manual
RAW DATA RATE
— Response time of data transmission/reception.
The raw data rate is factory set to 128 Kbps.
ROBUSTNESS
— GRE America, Inc. believes that an RF link should be
‘as good as wire.’ Robustness is closely related to range. Variables for
robustness and range include:
•
Transmitter Output Power
•
Receiver Sensitivity
•
Spreading Code Length
•
Raw Data Rate
•
Antenna Configuration
NOTE:
Spreading Code Length, Raw Data Rate, Robustness, and Multi-
path are interrelated; all terms are defined in this section.
SPREADING CODE LENGTH
— A shorter spreading code length
results in better performance in measurable areas such as cost, actual data
throughput, size, range, and robustness.
A longer spreading code length reduces the possibility of unintended sig-
nal interruption and/or regulatory implications. GRE America has taken
all the above criteria and used a spreading code length of 127 chip with
four different codes selectable by channel.
SYSTEM RESPONSE TIME
— Raw data rate, reflected by transmis-
sion response time. The minimum response time is 12 msec.
FCC Requirements
The FCC has allocated the frequencies between 902 – 928 MHz and
2.404 and 2.478 GHz for use with spread spectrum technology and does
not require the end user to obtain an FCC license to operate a GINA trans-
ceiver.
NOTE
: Professional installers who replace GRE-provided whip antennas
with one not approved by GRE America, must obey FCC regulations con-
cerning effective radiated power in the U.S. or the effective rules in the
destination country relating to ERP. For detail specifications, refer to
FCC Rules Part 15.247.