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Factory Group Plan
There are 50 factory defined groups in a base
station and beltpack. These group are organized
in different ways to provide flexibility to the
user on selecting frequencies. A group is com-
posed of intermodulation free frequencies, but a
group is also organized to be composed of fre-
quencies in different combinations of the TV
channels. The user then can select a group that
is clear of broadcast TV channels in the area by
selecting a group(s) that doesn’t use those chan-
nels.
Table 3 indicates how the factory defined
groups use the three TV channels for transmit
and 3 TV channels for receive. A shaded TV
channel indicates the group has frequencies in
that channel. The white TV channel indicates
the group has no frequencies in that TV chan-
nel. Group 1 uses at least one frequency from
each of the three TV channels for TX and RX.
However group 50 uses only the third TV chan-
nel for TX and RX.
11-2
Table 3
Groups and TV Channel Used
Shaded = TV used,
Not Shaded = TV not used.