4)A block diagram of an Armstrong FM transmitter is shown in the following figure.The parameters are as follows: fi = 200k:H z, fLo = 10.8M H z, Afi = 25H2, nı =64, n2 = 48:The center frequencies of the signal obtained at the output of the local oscillator(fLo) are:FrequencyMultiplierFrequencyMultiplierm(t)NBFMx(t)fLoа. 23.6 МНz, 2 МНиb. 1132.8 МНz, 96 МНzc. 12.8 MHz, 9.6 MHzd. None of these

Answered: A block diagram of an Armstrong FM…

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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3: Compare with aid of figures and equations between the Frequency Modulation (FM) and Phase Modulation (PM). Then draw the FM and PM signals.
Figure (1) shows the block diagram of a wideband frequency modulator using the indirect method. This modulator is used to transmit audio signals containing frequencies in the range of 100 Hz to 15 kHz. The narrowband is supplied with a carrier of frequency fl-0.1 MHz by crystal- controlled oscillator also ß-0.2, a second crystal- controlled oscillator supplied a sinusoidal wave of frequency 9.5 MHz to the mixer. The system Carrier frequency at the transmitter output, fc-100MHz Minimum frequency deviation, Af-75, find nl and n2? f(t) NBFM Freq. Multiplier 1 Oscillator1 Fig. (1) Mixer Oscillator2 Freq. Multiplier 2 frm(t) n1=72, n2=47 O n1=73, n2-48 O n1=75, n2=50 n1=77, n2=52 O n1=76, n2=51 O
Transmitter: a carrier frequency of 108 kHz and a modulating frequency of 0.3 kHz to 3.4 kHz is applied to an amplitude modulator. The USB and the LSB are both transmitted to the distant receiver, with a suppressed carrier. Receiver: the resultant USB and LSB from the transmitter are input to an amplitude demodulator. A carrier frequency of 108 kHz is reintroduced to the demodulator. Determine the following: 1. The LSB and USB at the output of the modulator. 2. The LSB and USB at the output of the demodulator.
4. An FM signal has a deviation of 10 kHz and is modulated by a sine wave with a frequency of 5kHz. The carrier frequency is 150MHz and the signal has a total power of 12.5W, operating into an impedance of 500. a. What is the modulation index? b. How much power is present at the carrier frequency?
An AM waveform has a maximum span of 7.5V while minimum span of 2.5V. Determine the modulation index and the transmission efficiency.
Explain the differences between Angle and Amplitude modulation. Both techniques positive and negative Talk about its features.
1. Calculate the total power of AM signal (par-A). 2. Calculate the bandwidth of AM signal (part-A). 3. Draw the spectrum of AM signal (part-A). DC Vmax Vmin m 3v 1.4 0.25 0.7 2v 1 0 1 1v 0.8 -0.36 1.94
Q)A sinusoidal voltage v = 10 sin 2t is passed through fullwave rectifier find the trigonometric Fourier series of output voltage.
An FM signal which is modulated by a 4 kHz sine wave reaches a maximum frequency of 100.01 MHz and minimum frequency of 99.97 MHz, then what is the one side frequency deviation of the signal?
For the given circuit below, the RF generator is set to EXT MOD, 500kHz. RF GEN 500KHZ R1 2702 R2 10K ELECTRONIC VOM 0.0047pF a) What is this circuit? b) Is there an RF signal across R2? c) Draw the expected signal waveform across R1 d) Draw the expected signal waveform across R2 e) What is the expected frequency of the signal across R2?
Transmitter: a carrier frequency of 108 kHz and a modulating frequency of 3.4 kHz is plied to an amplitude modulator. The USB and the LSB are both transmitted to the distant eceiver, with a suppressed carrier. Receiver: the resultant USB and LSB from the transmitter are input to an amplitude demodulator. A carrier frequency of 108 kHz is reintroduced to the demodulator. Determine the following: 1. The LSB and USB at the output of the modulator. 2. The LSB and USB at the output of the demodulator.
For an FM signal, the maximum frequency of the modulating signal is 100 kHz and the frequency deviation is 10 kHz. Find out the bandwidth of the FM modulated waveform.

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