308 Chapter 10
CDMA Digital Modulation
cdma2000 Forward Link Modulation for Component Test
cdma2000 Forward Link Modulation for Component Test
This section teaches you how to build forward link cdma2000 waveforms for testing component designs.
The waveforms are generated by the signal generator’s internal dual arbitrary waveform generator.
Activating a Predefined CDMA Forward Link State
This procedure teaches you how to perform the following tasks:
• “Selecting a cdma2000 Forward Link Predefined Setup” on page 308
• “Generating the Waveform” on page 308
• “Configuring the RF Output” on page 308
Selecting a cdma2000 Forward Link Predefined Setup
1. Press
Preset.
2. Press
Mode > CDMA > Arb CDMA2000.
3. Press
CDMA2000 Select > Pilot.
This selects a pilot cdma2000 forward link waveform. The display changes to FWD CDMA2000 Setup:
SR1 Pilot. Forward link is the default setting for link direction, and therefore does not need to be set.
Generating the Waveform
Press
CDMA Off On until On is highlighted.
This generates the predefined pilot CDMA forward link waveform. During waveform generation, the CDMA
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 CDMA forward link signal is now available at the RF OUTPUT connector of the signal
generator.
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