When working in hybrid mode, it is possible to provide the 20 W or 40 W terminal with
additional filters to use different frequency slots for the analog and the digital channels in
the same line or, even, in independent lines. The module arrangement for the additional
filters is shown in FIGURE 11.
The use of additional filters in a twin-channel analog terminal also allows the transmission
and reception bands of each channel to be non-adjacent.
FIGURE 11 OPU-1 module arrangement for 20 and 40 W with additional filters
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