161. When two in-phase sine waves that have identical frequency and amplitude are added together, then the result is a sine wave with __________ the amplitude of either.

5. The following circuit can be used as part of a loudspeaker crossover network. These networks can be pictured as frequency sensitive voltage dividers. This circuit allows low frequency tones to go into the low frequency transducer labeled here as "Loudspeaker", a.k.a. woofer. The crossover frequency is the frequency f at which the reactance magnitude equals the woofer's resistance.

5b) Find P F, S, and Q at 2000 Hz for an harmonic wave (i.e. sinusoidal signal) with a peak amplitude of 1V.

5. The following circuit can be used as part of a loudspeaker crossover network. These networks can be pictured as frequency sensitive voltage dividers. This circuit allows low frequency tones to go into the low frequency transducer labeled here as "Loudspeaker", a.k.a. woofer. The crossover frequency is the frequency f at which the reactance magnitude XL. equals the woofer's resistance.

If the woofer resistance is: R = 4 and L=1 mH.

Q3.
1. State the 3 Major Types of signal distortions. And state the frequency domain conditions for
each.
2. State the time domain condition for distotionless transmission.
3. A transmitter send a signal x(t)=A sin(2πfot + ϴ).The channel is the distortion less.
Propagation delay is г to reach to the receiver. Sketch the transmit and receive signals.
Verify the condition for distotionless transmission.
4. A 3000 km repeater system consists of m identical fibber-optic cable sections with
Attenuation 0.5 dB/km and m identical amplifiers. Find the required number of sections
and the gain per amplifier so that Pout = Pin = 5 mW and the input power to each amplifier
is at least 67 pW.