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Fac tory Group Plan
There are 50 fac tory de fined groups in a base
sta tion and beltpack. These group are or ga nized
in dif fer ent ways to pro vide flex i bil ity to the
user on se lect ing fre quen cies. A group is com --
posed of intermodulation free fre quen cies, but
a group is also or ga nized to be com posed of
fre quen cies in dif fer ent com bi na tions of the TV
chan nels. The user then can se lect a group that
is clear of broad cast TV chan nels in the area by
se lect ing a group(s) that does n’t use those
chan nels.
Ta ble 3 in di cates how the fac tory de fined
groups use the three TV chan nels for transmit
and 3 TV chan nels for re ceive. A shaded TV
chan nel in di cates the group has fre quen cies in
that chan nel. The white TV chan nel in di cates
the group has no fre quen cies in that TV chan --
nel. Group 1 uses at least one fre quency from
each of the three TV chan nels for TX and RX.
How ever group 50 uses only the third TV chan --
nel for TX and RX.
Ta ble 3
Groups and TV Chan nel Used
Shaded = TV used,
Not Shaded = TV not used.
10-2
Base TX Freq. Base RX Freq.
Group TV1 TV2 TV3 TV4 TV5 TV6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50