Chapter 13 375
Custom Digital Modulation
Using the Arbitrary 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 374.
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 375
• “Modifying Carrier Frequency Offset” on page 375
• “Modifying Carrier Power” on page 376
• “Generating the Waveform” on page 372
• “Configuring the RF Output” on page 376
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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