Keysight EXG and MXG X-Series Signal Generators User’s Guide 303
Using Custom Digital Modulation for N5172B/82B with Option 431 and 653/655/656/657
Using the Custom Real-Time I/Q Baseband Generator
Creating User-Defined Custom Modulation
This section teaches you how to perform the following tasks:
“Selecting Data” on page 303
“Configuring the Filter” on page 303
“Selecting a Symbol Rate” on page 303
“Selecting the Modulation Type” on page 303
“Configuring the Burst Rise and Fall Parameters” on page 303
“Activating Differential Data Encoding” on page 304
“Generating the Waveform” on page 304
“Configuring the RF Output” on page 304
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 .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 > .667 > bits.
4. Press Fall Time > 4.8 > bits.
5. Press Fall Delay > .667 > bits.
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