Intuicom Communicator
TM
User Manual
Revision A © 2001 Intuicom, Inc.
28
September 2001
8.2.2 2.4GHz
The Frequency Key for the Communicator 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. Because this feature offers the ability to select which
portion of the spectrum will be used it is critical that all radios in a link, whether point to
point or point to multipoint, use the same selections.
Frequency Key
Selections 0-E provide 15 different pseudo 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 3 additional choices
Selection 0 allows the user to determine which portion of the band to use:
Selection
Band Used
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 1/3
rd
of band
5
2 outer 1/3
rds
of band, avoids the middle
Table 8-2: 2.4 GHz Frequency Band Selections Available
Thus, two networks could be set up side by side using the entire band without collisions
by setting one network up with selection 0 and the second network with selection 1.
Selection 1 allows the user to set the size (number of frequencies) of the hop table to use.
The range available is from a minimum of 50 to a maximum of 80.
Selection 2 allows the user to select a frequency offset, whereby the frequencies used are
offset by 115.2 KHz from other frequency selections in the same portion of the band. For
example, if two networks are operating side by side in the lower 1/3
rd
of the band using
50 frequencies, with one set to Frequency Offset of 0 and the other to Frequency Offset
of 1, the frequencies used in the different hopping patterns will be offset by 115.2 KHz
