Answered: Define the following concepts a.…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

100%

Define the following concepts
a. Positive modulation percentage
b. Modulation efficiency
c. Signal strength
d. At least one technique for building an AM transmitter.

Expert Solution

Step 1

$A . P o s i t i v e m o d u l a t i o n p e r c e n t a g e - T h e p o s i t i v e m o d u l a t i o n p e r c e n t a g e c a n b e c a l c u l a t e d b y s u b t r a c t i n g t h e A_{C} (L e v e l o f A M e n v e l o p e i n t h e a b s e n c e o f m o d u l a t i o n) f r o m t h e A_{m a x} (M a x i m u m v a l u e o f A_{C} [1 + m (t)]) a n d t h e n d i v i d i n g i t b y A_{C} . P o s i t i v e m o d u l a t i o n % = \frac{A_{m a x} - A_{C}}{A_{C}} \times 100 O R P o s i t i v e m o d u l a t i o n % = m a x [m (t)] \times 100 w h e r e, A_{m a x} - M a x i m u m v a l u e o f A_{C} [1 + m (t)] A_{C} - L e v e l o f A M e n v e l o p e i n t h e a b s e n c e o f m o d u l a t i o n$