Spread Spectrum Wireless Data Transceiver User Manual
F
REQ
K
EY IN
2.4
GH
Z
T
RANSCEIVERS
The Frequency Key for the FreeWave Technologies 2.4GHz transceivers offers the ability to select more
than just a different pseudo-random hop table, but also the portion of the band which the transceiver will
use. In Point-to-Point networks the FreqKey is inherited from the Master transceiver or controlling
Repeater. FreqKey is also inherited from the Master or controlling Repeater when subnets are enabled.
Selection 0-E provides 15 different random hop tables, similar to the 900 MHz transceiver.
Selection F allows the user to set the Hop Table parameters. The user is then presented with 5 additional
choices.
Selection 0 allows the user to determine which portion of the band to use:
Selection
Band
0
Entire band, 2.400 - 2.4835 GHz
1
Entire band, but offset frequencies from selection 0
2 Lower
1/3
rd
of band
3
Middle of band
4
Upper one third
of the band
5
2 outer 1/3
rds
of band, avoids the middle
Thus, two networks can be set up side-by-side, one with a setting of 0 and the other set to 1, and use the
entire band without collisions
.
Selection
1
and
2
, Hop table size and Hop freq offset, behave the same as in the 900 MHz transceiver.
Selection
3
, Frequency Zone, allows the user to set which portions of the band the transceiver will use.
Setting a zone to 1 will include it in the hopping pattern of the radio, while setting the zone to 0 will
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6.1
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