Tx Introduction; Main Tx Component - Nokia 6088 Rf Description And Troubleshooting

Nokia Customer Care

Tx introduction

The RFT6122 (Figure 2) provides the Zero-IF transmit signal path for Cellular-CDMA transmission. For this chipset, Cellular-CDMA refers to
band classes 0 and 3 as defined by the cdma2000 standard, with mobile station transmitters operating between 824 and 925 MHz. The
transmit signal path includes baseband amplifiers, quadrature upconversion, gain control RF amplification, and an output driver amplifier.
The driver amplifier output is routed to the final stages of the transmit chain – power amplifier, isolator, duplexer, and antenna.

Main TX component

Power Amplifier
TX Saw filter
TX IC
Issue 1 10/2006
Figure 3: Tx components
© 2006 Nokia Corporation
RF Description and Troubleshooting
Direction coupler
Company Confide ntial
6088 (RM-218)
Cell Duplexer
Power detector
Page 6