Solve Q5 only4)A block diagram of an Armstrong FM transmitter is shown in the following figure.The parameters are as follows: fi = 200k H z, fLo = 10.8MHZ, Afi = 25HZ, n1 =64, n2 = 48:FrequencyMultiplierFrequencyMultiplierx n2m(t)NBFM→ x(t)f,Af1fLo5)The center frequency at the output for Q4 will be:а. 23.6 МHz, 2 MHzb. 1132.8 MHz, 96 MHzc. 12.8 MHz, 9.6 MHzd. None of these

Answered: Image /qna-images/answer/02fba371-1714-418e-9cc7-ffb18d60a9ae.jpg

Answered: 4) 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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An FM signal, eFM = 50 sin [2π(800k)t - 4 sin 2π(5k)t] is produced by a frequency modulator with -500Hz/V frequency deviation constant. Determine (a)Determine the equation of the carrier signal (b) What is the equation of the modulating signal (c) Determine the approximate bandwidth of the FM signal (use Carson’s Approximation)
A carrier (fc = 100 MHZ, A, = 25V) is frequency modulated by the sine wave (fm = 8 kHz, Am = 3V) using a frequency modulator with frequency deviation of 58kHz. Determine: (a) Carrier swing frequency of the output FM signal. (b) Highest and lowest sidebands' frequencies generated by the modulated signal. (c) The bandwidth of the FM signal. (d) The transmitted power through a 502 load. Ignore UnB < 0.1
In the circuit in the figure, Vcc= 18 V, Rs1 = 0.9 kohm, Rohm = 0.5 kQ, R1 = 75 kohm, R2 = 15 kohm, RC = 2.2 kohm, RE = 1 kohm and B = 120. It is also known that Cwi = 6 pF, Cwo = 10 pF, Cbc = Cu = 7 pF, Cbe = C = 44 pF and Cce = 11 PF. Accordingly, considering the frequency response of the circuit, what would the high cutoff frequency (fH) be? NOTE-1: The output impedance of the transistor is ro = 20 k and will be taken into account in the calculations. NOTE-2: high frequency dependence of hfe, B. will be taken into account.
The carrier signal of amplitude 10V is frequency modulated (K=2kHz/V) by a signal with frequency spectrum shown: a. Determine the approximate bandwidth of the FM signal (Bessel approximation).b. Determine the approximate bandwidth of the FM signal (Carson approximation).c. The power dissipated by the FM signal in a 75-ohm antenna.Answers a) 24 kHzb) 16 kHzc) 0.667 W
An Armstrong modulator is used to generate FM which is suitable for FM broadcasting.You are given input of narrowband FM signal with carrier frequency fc1 = 27 MHz anda frequency deviation Δf1= 17 kHz. Assume that the frequency multiplier with n = 3 andlocal oscillator frequency of 80 MHz. Calculate the output of the carrier frequency andfrequency deviation if additive frequency is selected by mixer. Explain your obtainedanswer.
A cellular radio transmitter has a power output of 3 W at 800 MHz. It uses an antenna with a gain of 3 dBi. The receiver is 5 km away, with antenna gain of 12 dBi. Ignoring feedline losses and mismatch, calculate (a) the EIRP in dBW (b) the free space path loss, (c) the power delivered to the receiver in W and dBm
Obtaining broadband FM signal from narrowband frequency modulated (FM) signal is shown below. The narrowband FM signal has a maximum frequency deviation of 100 Hz. The frequency of the local oscillator is f0=100 kHz. Since the sign at point A is Ac(cos 2πf0t+θ(t)), express the signs at points B and C. Ac is a constant and θ(t) is a function of m(t).
In the circuit in the figure, Vcc= 18 V, Rs1 = 0.9 k2, Rs2 = 0.5 kQ, R1 = 75 kQ, R2 = 15 kQ, RC = 2.2 kQ, RE = 1 k and B = 120. It is also known that Cwi = 6 pF, Cwo = 10 pF, Cbc = Cu = 7 pF, Cbe = C = 44 pF and Cce = 11 PF. Accordingly, considering the frequency response of the circuit, what would the high cutoff frequency (fH) be? NOTE-1: The output impedance of the transistor is ro = 20 k and will be taken into account in the calculations. NOTE-2: high frequency dependence of hfe, B. will be taken into account.
An Access Point in one room needs to reach a wireless station which is two rooms away. The signal must pass through 2 walls as shown in the diagram. The transmit power at the AP is 15 dBm. The distance from the AP to the wireless station is 12 meters and operation is in the 5 GHz band. The wall attenuation for each wall is 5 dB. What is the received power level at the wireless station in dBm. Enter a value without units. Truncate your answer to 1 decimal place (i.e. 5.6).
An interview is held with a student about the importance of education for thirty minutes at a radio station. It was later amplitude modulated & transmitted to receivers on the school campus.The expression below describes the transmitted signal a(z) a(z)= Acos(16πz) where A=3cos(10πz) a. In an expression form, express a(z) as a sum of sinusoids & determine the frequency components of the signal a(z)b. To adequately & fully recover the signal at the receiver, determine the rate at which the signal should be sampled.c. Determine the discrete signal,a[n] that was transmitted in a reduced form & the angular frequency assuming the signal a(z) is sampled at ten Hertz.
A transmission line with a characteristic impedance of 100 Ohm is used tomatch a 50 ohm section to a 200ohm section. If the matching is to be doneat 429 MHz and I GHz. The length of the transmission line can beapproximately.
As a technician, you are responsible for the construction of a 10km optical communication link between Pelonomi Hospital and National Hospital in Bloemfontein. The following link specifications are available:Transmitter output power: 15mWCommercially available optical cable length: 2kmOptical cable attenuation: 1.2dB/kmSplice attenuation: 0.1dB/kmLight transmitter-to-cable loss: 1.5dBCable-to-photo detector loss: 1.5dBSafety margin: 7dB Determine the minimum receiver sensitivity in microwatts needed to reliably detect a transmitted signal.

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