
Chapter 9 249
Custom Digital Modulation
Using the Arbitrary Waveform Generator
1. Press Mode > Custom > ARB Waveform Generator.
2. Press
Setup Select > More (1 of 2) > Custom Digital Mod State.
3. Highlight the desired file (for example, NADCQPSK).
4. Press
Select File.
5. Press
Digital Modulation Off On until On is highlighted.
The firmware generates the custom digital modulation waveform in volatile memory. After
waveform generation, the custom digital modulation waveform is available to be modulated
on the RF output.
For instruction on configuring the RF output, see “Configuring the RF Output” on page 248.
Creating a Custom Multicarrier TDMA Digital Modulation State
In this procedure, you learn how to customize a predefined multicarrier digital modulation
setup by creating a custom 3-carrier EDGE digital modulation state.
This section teaches you how to perform the following tasks:
• “Creating a Multicarrier Digital Modulation Setup” on page 249
• “Modifying Carrier Frequency Offset” on page 249
• “Modifying Carrier Power” on page 250
• “Generating the Waveform” on page 246
• “Configuring the RF Output” on page 250
Creating a Multicarrier Digital Modulation Setup
1. Press
Preset.
2. Press
Mode > Custom > Arb Waveform Generator.
3. Press
Multicarrier Off On.
4. Press
Multicarrier Define > Initialize Table > Carrier Setup > EDGE > Done.
Modifying Carrier Frequency Offset
1. Highlight the Freq Offset value (500.000 kHz) for the carrier in row 2.
2. Press
Edit Item > -625 > kHz.
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