Chapter 15 419
W-CDMA Digital Modulation for Component Test
W-CDMA Downlink Modulation
Creating a User-Defined Multicarrier W-CDMA State
This procedure teaches you how to perform the following tasks:
• “Selecting a Multicarrier W-CDMA Setup” on page 419
• “Adding a Carrier” on page 419
• “Modifying Carrier Parameters” on page 419
• “Clipping the Multicarrier Waveform” on page 421
• “Generating the Waveform” on page 421
• “Applying Modifications to an Active Multicarrier Waveform” on page 422
• “Configuring the RF Output” on page 422
Selecting a Multicarrier W-CDMA Setup
1. Press
Preset.
2. Press
Mode > W-CDMA > Arb W-CDMA.
3. Press
Multicarrier Off On > Multicarrier Define.
The Multicarrier WCDMA 3GPP Setup table editor is now displayed, showing parameters for the
default two-carrier setup.
Adding a Carrier
1. Highlight the PCCPCH + SCH carrier in table row 2 and press,
Insert Row > 3 DPCH.
This adds a predefined 3 DPCH carrier between the two original default carriers. You can also add a custom
W-CDMA carrier that has been previously created and stored.
Modifying Carrier Parameters
1. Press
Return.
2. Highlight the Freq Offset value (7.500000 MHz) for the new 3 DPCH carrier in row 2 and press,
Edit Item > −2.5 > MHz. Refer to, “Multicarrier Setup Page 1” on page 420.
3. Highlight the Power value (0.00 dB) for the new 3 DPCH carrier in row 2 and press,
Edit Item > −10 >
dB. Refer to, “Multicarrier Setup Page 1” on page 420.
4. Highlight Primary Scramble Code value N/A for the new 3 DPCH carrier in row 2 and press,
Edit
Item
> 5 > Enter. Refer to, “Multicarrier Setup Page 2” on page 421.
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