(2) Considering transmitter frequencies only, six groups or
blocks of frequencies are required for the triangle (A, figure 23).
These blocks of frequencies are numbered from I through VI. Relative
to location A, I and II are the transmitting frequencies and IV and V
are the receiving frequencies.
(3) Analyzing the situation, in order to set up a system
between A and M, the transmitter frequencies at A must be from Block
I and the receiver frequencies at A must be from Block IV.
Each
system has a designated block from which the frequencies are taken
(B, figure 23). To set up a system from B to M, find the block where
B transmits and M receives. In this case it is Block VI (B, figure
23).
(4) It has been determined that six blocks of frequencies are
required by considering the six transmitter frequencies from the
triangle situation.
Also considered are the necessary separation
required between the blocks, that is, the transmitter separation from
receiver frequency by at least 16.5 megahertz or more.
From the
triangle situation to a more complex situation such as figure 24, now
it is necessary to determine the number of frequencies required in
each block.
To accomplish this, an analysis must be made of the
system requirements (figure 24).
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