Rx Introduction; Main Rx Component - Nokia 7088 Troubleshooting Manual

7088 (RM-219)
RF Description and Troubleshooting

Rx introduction

The RFR6122 IC (Figure 8) provides the Zero-IF receiver signal path for Cellular-CDMA reception. For this chipset, Cellular-CDMA
refers to band classes 0 and 3 as defined by the cdma2000 standard, with mobile station receivers operating between 832 and 894
MHz. The Rx signal path includes the LNA, quadrature downconversion, and baseband functions.
The Cellular-CDMA receive signal is routed from the antenna to the RFR6122 IC via the duplexer. The analog baseband outputs
interface with one of Qualcomm's Mobile Station MSM6025 devices that also provide status and control signaling. Integrated RX LO
circuits, ideally supplemented by the RFT6122 transmitter IC, provide frequency plan flexibility and further reduce PCB parts count.

Main RX component

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