Tektronix AWG 2021 Manuale Utente Scaricare il pdf (Pagina 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

1 2 3 4 5 6 7 ... 35 36

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Tektronix AWG 2021 Manuale Utente Pagina 2