Rf Description; Receiver (Rx); Transmitter (Tx) - Nokia RM-849 Service Manual

RM-849; (Nokia Lumia 610)
System Module

RF description



Receiver (RX)

An analogue signal is received by phone's antenna. The signal is converted to a digital signal and then
transferred further to the baseband (e.g. to the earpiece).
The receiver functions are implemented in the RTR6285A RF block. Signals at different frequencies goes different
path, and are therefore is processed by different components.

Transmitter (TX)

The digital baseband signal (e.g. from the microphone) is converted to an analogue signal, which is then
amplified by amplifier and transmitted from the antenna. The frequency of this signal can be tuned to match the
bandwidth of the system in use (e.g. WCDMA Band1 band).
The transmitter functions are implemented in the RTR6285A RF block. Even though WCDMA Band1 signals are
sent via different components, the principles of the transmission are the same.
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