ETS2228 Maintenance Manual
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Figure 8 RF receiving unit
2 .Transmit unit
Primary unit function: Emission modulation module RFT6120 directly amplifies analog I/O signals
after DA conversion. Next, radio frequency signals are generated after RF Mixer and RF filter function
on the signals. Then the RF signals are amplified by the RF amplifier, so that RF emission signals set
with certain output power value are generated. Finally, after the duplex module sufficiently filters
out-of-band spurious emission signals, the signals will be sent to the antenna. The other function of the
duplex module is to prevent the emission signals from disturbing the work of the receiver.
