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Design an Armstrong indirect FM modulator to generate an FM signal with a carrier frequency of 96.3 MHz and frequency deviation delta f = 20 kHz. The message signal has a bandwidth of 15 kHz. You have at your disposal a narrowband FM generator with a fixed center frequency fc = 150 kHz and an adjustable delta f from 5 to 15 Hz. You also have frequency doublers, mixers and an oscillator with an adjustable frequency from 13 to 14 MHz. There are also bandpass filters of any specification.
A. Draw the block diagram of the system. Specify the settings on each adjustable device. Specify the center frequency and bandwidth of each bandpass filter.
B. Draw the block diagram of a de-modulator for the FM signal.
The solar constant at Earth orbit (1 AU = 1 Astronomical Unit - Sun-Earth distance) is ~1400 Watts/m2. Assuming that this Poynting flux magnitude can be associated with a single E- and Hfield (i.e., E × H ),
A signal is bandlimited to 20kHz. The band between 16 and 20 kHz is corrupted by noise such that the information is unrecoverable. Determine the analog lowpass filter maximum frequency to eliminate corrupted noise.
A)Design a high-pass filter with a cutoff frequency of 40 kHz. Use 0.01 uF capacitor and an appropriate resistor. B) Sketch and label the circuit. C) What is the gain of the filter at the cutoff frequency Give your answer both as ratio (Vout/Vin) ..
Using the Nth order term only of the transfer polynomial, find the Nth order relationship for the Nth order products.
Where (in the sequence of subsystems within a communication system) does the line encoder used? Draw a block diagram. Write a sentence or two on what is in the other boxes. What are the two broad parameters associated with an efficient line encoder..
1 To double the corner frequency in the low-pass and high pass two-pole filters, how would you change the values of the resistors and capacitors .2 Compare the one pole RC filters used in an active setup versus the passive setup
Two free particles (that is, free to move) with charges +1µC and +3µC are a distance L = 2m apart. A third charge is placed so that the entire system is in equilibrium. Find the location, magnitude, and sign of the third charge.
You have a 10 nH inductor. What value of capacitor should you put in series with the inductor to achieve an impedance of Z=j50 ohm at f=1.0 GHz
Write a Matlab program to calculate the electric field due to a line of charge of length 1m. a) Describe the line of charge as a collection of point charges centered on the z-axis. Calculate the electric scalar potential of that same line of charge.
Calculate the unit step response of the DT systems with the following impulse responses: a-) h[k]= u[k+6]- u[k-10] b-) h[k]= 3^k- u[-k]
write a program that calculates the quadratic equation. the program should be able to compute imaginary numbers (i.e. sqrt(-1)). finally, output the tow result. hint: the computer cannot directly compute imaginary numbers
Each pole of a 100kW, 250v flet-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the total shunt field resistance is 100 ohms
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