336 Chapter 10
CDMA Digital Modulation
IS-95A Modulation
IS-95A Modulation
This section teaches you how to build dual arbitrary waveform generated IS-95A CDMA modulation for
testing component designs.
Creating a Predefined CDMA State
This section teaches you how to perform the following tasks:
• “Selecting a Predefined CDMA Setup” on page 336
• “Generating the Waveform” on page 336
• “Configuring the RF Output” on page 336
Selecting a Predefined CDMA Setup
1. Press
Preset.
2. Press
Mode > CDMA > Arb IS-95A.
3. Press
Setup Select > 64 Ch Fwd.
Generating the Waveform
Press
CDMA Off On.
This generates a predefined 64 channel forward CDMA waveform. The display changes to CDMA Setup:
64 Ch Fwd. During waveform generation, the CDMA and I/Q annunciators appear and the predefined
digital modulation state 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 890.01 MHz.
2. Set the output amplitude to −10 dBm.
3. Press
RF On/Off.
The predefined 64 channel forward CDMA signal is now available at the signal generator’s RF OUTPUT
connector.
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