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1. The phase shift between fi(t) and f:(1) in QAM is a. 90° b. 180° c. 270 d. 360

1. The phase shift between fi(t) and f:(1) in QAM is a. 90° b. 180° c. 270 d. 360

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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1. The phase shift between fi(t) and fa(1) in QAM is c. 270 a. 90° b. 180° d. 360° 2. In envelope detector circuit, the negative half signal of AM signal will capacitor the a. discharge b. charge c. a&b 3. LPF has a. One cutoff frequency b. two cutoff frequency c. a&b 4. The normal AM is a. DSB-SC b. DSB-LC c. SSB 5. The transmission bandwidth in FDM must be the signal to be combined. a. equal to the sum of the bandwidths of b. less than C. greater than
Transcribed Image Text:1. The phase shift between fi(t) and fa(1) in QAM is c. 270 a. 90° b. 180° d. 360° 2. In envelope detector circuit, the negative half signal of AM signal will capacitor the a. discharge b. charge c. a&b 3. LPF has a. One cutoff frequency b. two cutoff frequency c. a&b 4. The normal AM is a. DSB-SC b. DSB-LC c. SSB 5. The transmission bandwidth in FDM must be the signal to be combined. a. equal to the sum of the bandwidths of b. less than C. greater than
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