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17 W-CDMA Downlink Digital Modulation for
Receiver Test
In the following sections, this chapter provides the following information. These features are available only
in E4438C ESG Vector Signal Generators with Option 001/601or 002/602.
This chapter teaches you how to build fully coded W-CDMA downlink modulated signals for testing
mobile/user equipment (UE) designs and provides information on how the W-CDMA downlink format is
implemented within the ESG. The modulation is generated by the signal generator’s internal baseband
generator. This chapter includes the following sections:
• “Using W-CDMA Downlink” on page 578
• “Transmit Diversity Overview” on page 586
• “Configuring for Transmit Diversity and BERT” on page 589
• “Out-of-Synchronization Testing Overview” on page 600
• “Configuring for Out-of-Synchronization Testing” on page 601
• “Compressed Mode Overview” on page 607
• “Setting Up for a Compressed Mode Signal” on page 610
• “Making Compressed Mode Signal Measurements” on page 619
• “Locating Rear Panel Input Signal Connectors” on page 625
• “Configuring Rear Panel Output Signals” on page 627
• “W-CDMA Downlink Concepts” on page 632
• “W-CDMA Frame Structures” on page 639
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