424 Chapter 15
W-CDMA Digital Modulation for Component Test
W-CDMA Uplink Modulation
W-CDMA Uplink Modulation
This section teaches you how to build uplink 3GPP 12-2004 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 424
• “Generating the Waveform” on page 424
• “Configuring the RF Output” on page 424
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.
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