User`s guide

306 Chapter 13

W-CDMA Digital Modulation for Component Test

W-CDMA Uplink Modulation

This section teaches you how to build uplink 3GPP 09-2002 W-CDMA waveforms for testing

component designs. The waveforms are generated by the signal generator’s internal dual

arbitrary waveform generator.

Creating a Predefined W-CDMA Uplink State

This procedure teaches you how to perform the following tasks:

• “Selecting a Predefined W-CDMA Setup” on page 306

• “Generating the Waveform” on page 306

• “Configuring the RF Output” on page 306

Selecting a Predefined W-CDMA Setup

1. Press

Preset.

2. Press

Mode > W-CDMA > Arb W-CDMA > Link Down Up.

3. Press

W-CDMA Select > DPCCH + 3 DPDCH.

This selects a predefined setup, which consists of one dedicated physical control channel

(DPCCH) and three dedicated physical data channels (DPDCH) for an uplink waveform. The

display changes to UL WCDMA Setup: DPCCH + 3 DPDCH.

Generating the Waveform

Press

W-CDMA Off On until On is highlighted.

This generates a predefined W-CDMA uplink waveform with a DPCCH and 3 DPDCH

channels. During waveform generation, the WCDMA and I/Q annunciators appear and the

waveform is stored in volatile ARB memory. The waveform is now modulating the RF carrier.

Configuring the RF Output

1. Set the RF output frequency to 2.17 GHz.

2. Set the output amplitude to

−10 dBm.

3. Press

RF On/Off until On is highlighted.

The predefined W-CDMA uplink signal is now available at the signal generator’s RF OUTPUT

connector.