Rohde & Schwarz SMW200A - Page 26

Contents
R&S
®
SMW200A
11User Manual 1175.6632.02 ─ 16
4.10.3.4 Trigger, Marker and Clock Setting.............................................................................. 379
4.10.4 How to Use the Multi-Carrier Continuous Wave Function...........................................380
4.10.5 References..................................................................................................................381
4.11 Generating a Linear Slope Ramp Waveform.......................................................... 382
4.12 Shifting and Boosting the Baseband Signal.......................................................... 382
4.12.1 About the Baseband Offsets....................................................................................... 383
4.12.1.1 Impact of the Frequency Offset...................................................................................383
4.12.1.2 Impact of the Phase Offset..........................................................................................384
4.12.1.3 Impact of the Gain.......................................................................................................385
4.12.2 Baseband Offsets Settings..........................................................................................385
4.12.3 How to Improve Signal Characteristics by Shifting the Wanted Baseband Signal......387
5 Simulating Fading, Adding Noise and Predistortions, and Impairing
the Signal............................................................................................389
5.1 Simulating Fading..................................................................................................... 389
5.2 Adding Noise to the Signal...................................................................................... 389
5.2.1 Required Options........................................................................................................ 389
5.2.2 About the AWGN Generator....................................................................................... 390
5.2.3 AWGN Settings........................................................................................................... 394
5.2.3.1 General Settings......................................................................................................... 396
5.2.3.2 Noise Power/Output Results Settings......................................................................... 398
5.2.4 How to Configure the Noise Generator for Receiver Tests.........................................403
5.3 Impairing the Signal..................................................................................................406
5.3.1 Required Options........................................................................................................ 406
5.3.2 About the Linear I/Q Impairments............................................................................... 406
5.3.2.1 Gain and Gain Imbalance........................................................................................... 407
5.3.2.2 I and Q Offset..............................................................................................................408
5.3.2.3 Quadrature Offset....................................................................................................... 408
5.3.3 Analog and Digital Impairments Settings.................................................................... 409
5.3.4 How to Optimize the Carrier Leakage and Sidebands Suppression........................... 413
5.4 Frequency Response Correction.............................................................................414
5.5 Applying Digital Predistortion................................................................................. 414
6 Applying I/Q Vector Modulation........................................................415
6.1 Required Options...................................................................................................... 415