Txtroubleshooting; Tx System Block Diagram; Tx Introduction; Main Tx Component - Nokia 1508 Manual

Rf description and troubleshooting

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1508(RM-388)

RF Description and Troubleshooting

Nokia Customer Care

Tx Troubleshooting

Figure 3: Tx system block diagram

The GRF6401 (Figure 3) 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 849

MHz. The transmit signal path includes baseband amplifiers, quadrature upconversion, gain

control RF amplifier. The gain control RF amplifier output is routed to the final stages of the

transmit chain –Tx saw filter, power amplifier, direction coupler, duplexer, and antenna.

Figure 4: Tx main components

Put PWB on the module jig. Use the following steps to configure AMS for RF

troubleshooting.

1. Connect RF connector to a CMU200 or 8960.

2. Connect the PWB to a PC via the Module Jig, and connect a power supply.

3. Open AMS Tools software and select RF Tool.

Issue 1

Table of Contents

Troubleshooting

Rm-388