Keysight EXG and MXG X-Series Signal Generators User’s Guide 231
Basic Digital Operation for N5172B/82B with Options 653/655/656/657
Using the Custom Real-Time I/Q Baseband Generator
5. Press Fall Delay > .667 > bits.
This configures the burst shape for the custom real-time I/Q baseband digital modulation format.
For instructions on creating and applying user-defined burst shape curves, see “Using Customized
Burst Shape Curves” on page 270.
Activating Differential Data Encoding
1. Press Return.
2. Press More (1 of 3) > Diff Data Encode Off On.
This activates differential data encoding for the current real-time I/Q baseband digital modulation
format. For more information, see “Differential Encoding” on page 305.
To generate and output the custom digital modulation, complete the steps in the following
sections.
Generating the Waveform
1. Press More (2 of 3) > More (3 of 3)
2. Press Custom Off On until On is highlighted.
This generates the custom real-time I/Q baseband waveform with the parameters defined in the
previous sections. During waveform generation, the CUSTOM and I/Q annunciators activate and the
custom waveform is stored in pattern RAM. The waveform is now modulating the RF carrier.
Configuring the RF Output
1. Set the RF output frequency to 500 MHz.
2. Set the output amplitude to 0 dBm.
3. Press RF On/Off.
The custom real-time I/Q baseband waveform is now available at the signal generator’s
RF OUTPUT connector.
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