Tektronix AWG 2021 - Manual (Page 2)

2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Analog Carriers and Modulation
1 Basic Sine Wave Amplitude Modulation (AM) . . . . . . . . . . . . . . . 3
2 AM with Adjacent Carriers . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Multi-Tone Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Frequency Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 FM with Dual-Tone Modulation . . . . . . . . . . . . . . . . . . . . . . . . 10
6 FM Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Adding Noise to a Carrier Signal — AWG Noise Characteristics . . . . . . . . . . . 14
Digital Modulation
8 Digital Phase Modulation — PSK . . . . . . . . . . . . . . . . . . . . . . . 17
9 Baseband Digital Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Digital AM — OOK and BPSK . . . . . . . . . . . . . . . . . . . . . . . . . 20
11 Digital FM — FSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12 Quadrature Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
13 Filtering Out Unwanted Sidebands . . . . . . . . . . . . . . . . . . . . . . . 25
14 Direct Sequence Spread Spectrum . . . . . . . . . . . . . . . . . . . . . . 28
For More Information on Tektronix Instrumentation . . . . . . . . . . . . . . . . . . 29
AWG 2000 Series Arbitrary Waveform Generators . . . . . . . . . . . . . . . . 30
TDS 744A Digitizing Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . 31
Table of Contents
Note: Each signal and waveform screen in this application note originates from one of three types of instruments: an
arbitrary waveform generator, a digital storage oscilloscope, or a spectrum analyzer. Each illustration is annotated
with a symbol indicating its origin:
AWG
Oscilloscope (DSO)
Spectrum Analyzer