Different frequencies to be
used to prevent the power that “leaks”
out the back and sides of a transmit antenna from interfering with the signal
entering the input of a nearby receive antenna.
If the transmit and receive
carrier frequencies are different, filters in the receiver separation network
will prevent ringaround from occuring.
The equalizer compensates for
gain-versus-frequency
nonlinearities and envelope delay distortion introduced in the system.
Transmit Modulator up converts the
IF to RF for retransmission.
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