User`s guide

Chapter 13 295
W-CDMA Digital Modulation for Component Test
W-CDMA Downlink Modulation
Creating a User-Defined W-CDMA Downlink State
This procedure teaches you how to perform the following tasks:
• “Selecting a W-CDMA Downlink Setup” on page 295
• “Editing Downlink Channel Parameters” on page 296
• “Inserting Additional Channels” on page 298
• “Clipping the Waveform” on page 298
• “Generating the Waveform” on page 298
• “Applying Channel Modifications to an Active Waveform” on page 299
• “Configuring the RF Output” on page 299
CAUTION Unless previously saved to the signal generator’s non-volatile memory,
modifications made to predefined channel configurations are lost when changes
are made to link direction.
To store a custom W-CDMA state, see “Storing a W-CDMA Downlink/Uplink
State” on page 299.
Selecting a W-CDMA Downlink Setup
1. Press
Preset.
2. Press
Mode > W-CDMA > Arb W-CDMA.
3. Press
W-CDMA Define > Edit Channel Setup.
The channel table editor is now displayed, as shown in the following figure. Notice that a
dedicated physical channel (DPCH) with predefined parameters is the default setup. The
horizontal scroll bar at the bottom of the screen indicates that there are more columns to the
right of the Scramble Code column. Use the front panel knob or right arrow key to move the
cursor to view the additional columns.