372 Chapter 13
Custom Digital Modulation
Using the Arbitrary Waveform Generator
Using the Arbitrary Waveform Generator
This section teaches you how to build dual arbitrary (ARB) waveform generated custom TDMA digital
modulation for testing component designs.
Custom ARB digital modulation creates waveforms using modulation types, filtering, symbol rates, and
other parameters defined by digital communications standards. These waveforms are formatted as unframed
data.
Using Predefined Custom TDMA Digital Modulation
This section teaches you how to perform the following tasks:
• “Selecting a Predefined EDGE Setup” on page 372
• “Generating the Waveform” on page 372
• “Configuring the RF Output” on page 372
Selecting a Predefined EDGE Setup
1. Press
Preset.
2. Press
Mode > Custom > ARB Waveform Generator.
3. Press
Setup Select > EDGE.
Generating the Waveform
Press
Digital Modulation Off On.
This generates a waveform with the pre-defined EDGE state selected in the previous section. The display
changes to Dig Mod Setup: EDGE. During waveform generation, the DIGMOD and I/Q annunciators
appear and the pre-defined digital modulation state is stored in volatile memory (WFM1). The waveform is
now modulating the RF carrier.
Configuring the RF Output
1. Set the RF output frequency to 891 MHz.
2. Set the output amplitude to −5 dBm.
3. Press
RF On/Off.
The predefined EDGE signal is now available at the signal generator’s RF OUTPUT connector.
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