Example 7.8 Calculate the modulation frequency fm and modulation index m for the spectrum analyzer display shown in Fig. 7-11 -10 MHz fm = 2*5K = 10 KHZ 3 = 10 * 4 = 40dB = 10 dB M er = 5.5×10:55dB 3= 40 55 2 -15 dB Center Frequency: 10 MHz Ref. Level: 10 dBm Vert: 10 dB/division Span: 5 kHz/division B = atntil 09 dB Fig. 7-11 Spectrum analyzer display for AM modulation

Example 7.8 Calculate the modulation frequency fm and modulation index m for the spectrum analyzer display shown in Fig. 7-11 -10 MHz fm = 25K = 10 KHZ 3 = 10 4 = 40dB = 10 dB M er = 5.5×10:55dB 3= 40 55 2 -15 dB Center Frequency: 10 MHz Ref. Level: 10 dBm Vert: 10 dB/division Span: 5 kHz/division B = atntil 09 dB Fig. 7-11 Spectrum analyzer display for AM modulation

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...

See similar textbooks

Similar questions

Determine the following: Zi Avs = Vo/Vs fLG, fLC, and fLS low-cutoff frequency
the binary modulation scheme where 1 is represented by +A and 0 is represented by -A is called: a)polar NRZ b)NRZ c)RZ D)NRZ-1
What will be the modulation index, if the power in the carrier signal is 15KW and total power in the modulated AM signal is 17KW. Select one: a. 0.516 b. 0.346 c. 0.685 d. 0.826 e. None Clear my choice
For sinusoidal modulation in an AM system, what will be the value of the modulation index when the maximum and the minimum values of the envelope are 5 V and 1 V respectively. Assume no crossover is taking place.
Design an Armstrong indirect FM modulator to generate an FM carrier with carrier frequency of 1 and ∆= 75. A narrowband FM generator is available at a carrier frequency of 100 and a frequency deviation ∆= 10. The stock room also has an oscillator with an adjustable frequency in the range of 10 to 11 MHz. There are also frequemncy doublers, triplers and quantiplers.
(a) Explain on the AM Single Sideband Full Carrier (SSBFC) and compare to DoubleSide Band Full Carrier (DSBFC) on their:(iv) Carrier power.(v) Sideband power
Chose the correct answer 8- Calculate the bandwidth occupied by a DSB signal when the modulating frequency lies in the range from 100 Hz to 10 KHz a) 28 KHz b) 24.5 KHz c) 38.6 KHz d) 19.8 KHz
How would you increase the passband gain by a factor of five without changing the cutoff frequency?
1- Explain the principle of direct method generation of FM signal.2- What is the difference between narrowband FM and wideband FM refer tothe spectral component of the two signals.3- Compare the S/N ratio of:a) AM DSB-LCb) AM SSB-SCc) FM4- Explain the operation of frequency demodulation by using the PLL method.5- Explain what Carson's rule is.
With the blog diagram structure given in Figure 1, 3 different signal amplitudes shown with xa (t), xb (t), xc (t)and w (t) modulated signal is obtained. Belonging to 3 signals to be transmittedfrequency spectra (Xa (jw), Xb (jw), Xc (jw)) are given in Figure 2. According to this;a) Since wa <wb <wc, the frequency at the outputs indicated by ya (t), yb (t), yc (t) and w (t)Draw spectra (Ya (jw), Yb (jw), Yc (jw), W (jw)).b) What is the name of this blog diagram in the communication system? Describe briefly.
An FM signal has a maximum frequency deviation of 1500h and a modulating frequency of 500h, its total power is 6500w, applied to a resistive load of 1ohm, the carrier frequency is 400Mhz. Determine the voltage of the modulated signal and the modulation voltage.
Assume that RE = 0 as shown. What values of RL and IC are required to achieve Avt = 16 dB and Rin = 250 kΩ? Assume βo = 95.