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16 W-CDMA Uplink Digital Modulation for Receiver
Test
The following 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 uplink modulated signals for testing base
station receiver designs and provides information on how the W-CDMA uplink format is implemented
within the ESG. The modulation is generated by the signal generator’s internal baseband generator. There are
two channel modes for transmitting an uplink signal, PRACH and DPCH. This chapter covers both channel
modes and includes the following sections:
• “Equipment Setup” on page 447
• “Understanding the PRACH” on page 449
• “Generating a Single PRACH Signal” on page 462
• “Multiple PRACH Overview” on page 474
• “Setting Up a Multiple PRACH Signal” on page 479
• “Overload Testing with Multiple PRACHs—Multiple ESGs” on page 497
• “DPCH” on page 504
• “Compressed Mode Single Transmission Gap Pattern Sequence (TGPS) Overview” on page 517
• “Setting Up Compressed Mode for a Single TGPS Transmission” on page 519
• “Compressed Mode Multiple Transmission Gap Pattern Sequence (TGPS) Overview” on page 528
• “Setting Up Compressed Mode for a Multiple TGPS Transmission” on page 531
• “Configuring the UE Setup” on page 542
• “Locating Rear Panel Input Signal Connectors” on page 543
• “Configuring Rear Panel Output Signals” on page 545
• “Adjusting Code Domain Power” on page 548
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