610 Chapter 17
W-CDMA Downlink Digital Modulation for Receiver Test
Setting Up for a Compressed Mode Signal
Setting Up for a Compressed Mode Signal
Using the compressed mode turns the ESG ALC feature off. To maintain amplitude accuracy, it is
recommended that you perform a power search. This is demonstrated in the task, “Performing a Manual
Power Search” on page 617.
The signal parameters set in this section are used for both setups shown in the Equipment Setup section.
NOTE Ensure that transmit diversity has been set to None and the Out-of-sync Test Off On softkey is
set to Off. If either of the two features are active, a conflict of settings error message
(error -221) is generated when compressed mode is turned on. This will prevent you from
using the feature. Refer to “Selecting Antenna One Mode” on page 591 for instructions on
accessing the transmit diversity mode softkey selection menu and “Generating the
Baseband Signal and Activating the Out-Of-Synchronization Test Feature” on page 605 for
instructions on accessing the Out-of-sync Test Off On softkey.
Equipment Setup
Required Equipment for Measuring the DPCH Symbol Power
• one E4438C ESG Vector Signal Generator with Options 001/601or 002/602 and 400
• one Agilent E4440A PSA Spectrum Analyzer with Options B7J and BAF or an equivalent instrument
Required Equipment for BERT Measurements
• one E4438C ESG Vector Signal Generator with Options 001/601or 002/602, 400, and UN7
• an external controller to control the UE being tested
• an interface level matching circuit for interfacing between the UE being tested and the signal generator
when the UE signal specifications are different from those of the signal generator
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