230 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Basic Digital Operation for N5172B/82B with Options 653/655/656/657
Using the Custom Real-Time I/Q Baseband Generator
Creating User-Defined Custom Modulation
This section shows you how to perform the following tasks:
“Selecting Data” on page 230
“Configuring the Filter” on page 230
“Selecting a Symbol Rate” on page 230
“Selecting the Modulation Type” on page 230
“Configuring the Burst Rise and Fall Parameters” on page 230
“Activating Differential Data Encoding” on page 231
“Generating the Waveform” on page 231
“Configuring the RF Output” on page 231
Selecting Data
1. Press Preset.
2. Press Mode > Custom > Real Time I/Q Base Band > Data > FIX4.
3. Press 1010 > Enter > Return.
Configuring the Filter
1. Press Filter > Select > Gaussian.
2. Press Filter BbT.
3. Press 0.45 > Enter > Return.
Selecting a Symbol Rate
1. Press Symbol Rate.
2. Press 25 > ksps > Return.
Selecting the Modulation Type
Press Modulation Type > Select > QAM > 32QAM > Return.
For information on user-defined I/Q mapping, see “Using I/Q Modulation” on page 211. For
information on user-defined FSK modulation, see Figure 9-22 on page 283.
Configuring the Burst Rise and Fall Parameters
1. Press Burst Shape > Rise Time.
2. Press 5.202 > bits.
3. Press Rise Delay > 0.667 > bits.
4. Press
Fall Time > 4.8 > bits.
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